Project: Apache Solr
Code Location: http://svn.apache.org/repos/asf/lucene/dev/trunk/solr//lucene/dev/trunk/solr
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                      Apache Solr Release Notes

Introduction
------------
Apache Solr is an open source enterprise search server based on the Apache Lucene Java
search library, with XML/HTTP and JSON APIs, hit highlighting, faceted search,
caching, replication, and a web administration interface. It runs in a Java
servlet container such as Jetty.

See http://lucene.apache.org/solr for more information.


Getting Started
---------------
You need a Java 1.7 VM or later installed.
In this release, there is an example Solr server including a bundled 
servlet container in the directory named "example".
See the tutorial at http://lucene.apache.org/solr/tutorial.html


$Id: CHANGES.txt 1592605 2014-05-05 18:54:08Z hossman $

==================  5.0.0 ==================

Versions of Major Components
---------------------
Apache Tika 1.5
Carrot2 3.9.0
Velocity 1.7 and Velocity Tools 2.0
Apache UIMA 2.3.1
Apache ZooKeeper 3.4.6

Upgrading from Solr 4.x
----------------------

* The "file" attribute of infoStream in solrconfig.xml is removed. Control this 
  via your logging configuration (org.apache.solr.update.LoggingInfoStream) instead.

* UniqFieldsUpdateProcessorFactory no longer supports the <lst named="fields"> init
  param style that was deprecated in Solr 4.5.  If you are still using this syntax, 
  update your configs to use <arr name="fieldName"> instead. See SOLR-4249 for more 
  details.

* The following legacy numeric and date field types, deprecated in Solr 4.8, are no
  longer supported: BCDIntField, BCDLongField, BCDStrField, IntField, LongField,
  FloatField, DoubleField, SortableIntField, SortableLongField, SortableFloatField,
  SortableDoubleField, and DateField.  Convert these types in your schema to the
  corresponding Trie-based field type and then re-index.  See SOLR-5936 for more
  information.

* getAnalyzer() in IndexSchema and FieldType that was deprecated in Solr 4.9 has
  been removed.  Use getIndexAnalyzer() instead. See SOLR-6022 for more information.

Detailed Change List
----------------------

New Features
----------------------

* SOLR-5287: You can edit files in the conf directory from the admin UI.
  (Erick Erickson, Stefan Matheis)
  Additional work:
  - SOLR-5446: Admin UI - Allow changing Schema and Config (steffkes)
  - SOLR-5458: Admin UI - Remove separated Pages for Config & Schema (steffkes)
  - SOLR-5456: Admin UI - Allow creating new Files (steffkes)
  - SOLR-5518: Added EditFileRequestHandler to deal with security issues around
    modifying solr configuration files.  (Erick Erickson)
  - SOLR-5539: Admin UI - Remove ability to create/modify files (steffkes)


Other Changes
----------------------

* SOLR-4622: Hardcoded SolrCloud defaults for hostContext and hostPort that
  were deprecated in 4.3 have been removed completely. (hossman)

* SOLR-4792: Stop shipping a .war. (Robert Muir)

* SOLR-5936: Removed deprecated non-Trie-based numeric & date field types.
  (Steve Rowe)

* SOLR-5868: HttpClient should be configured to use ALLOW_ALL_HOSTNAME hostname
  verifier to simplify SSL setup. (Steve Davids via Mark Miller)

==================  4.9.0 ==================

Versions of Major Components
---------------------
Apache Tika 1.5
Carrot2 3.9.0
Velocity 1.7 and Velocity Tools 2.0
Apache UIMA 2.3.1
Apache ZooKeeper 3.4.6

Upgrading from Solr 4.8
----------------------

* placeholder

Detailed Change List
----------------------

New Features
----------------------

* SOLR-5999: Add checkIntegrityAtMerge support to solrconfig.xml.
  (Varun Thacker via Ryan Ernst)

Bug Fixes
----------------------

* SOLR-5904: ElectionContext can cancel an election when it should not if there
  was an exception while trying to register as the leader. 
  (Mark Miller, Alan Woodward)

* SOLR-5993: ZkController can warn about shard leader conflict even after the conflict
  is resolved. (Gregory Chanan via shalin)

* SOLR-6002: Fix a couple of ugly issues around SolrIndexWriter close and 
  rollback as well as how SolrIndexWriter manages it's ref counted directory
  instance. (Mark Miller, Gregory Chanan)

* SOLR-6017: Fix SimpleQParser to use query analyzer instead of index analyzer.
  (Ryan Ernst)

* SOLR-6029: CollapsingQParserPlugin throws ArrayIndexOutOfBoundsException
  if elevated doc has been deleted from a segment. (Greg Harris, Joel Bernstein)

* SOLR-6030: Use System.nanoTime() instead of currentTimeInMills() in LRUCache.warm.
  (Tomás Fernández Löbbe via shalin)

* SOLR-6037: Fixed incorrect max/sum/stddev for Date fields in StatsComponent
  (Brett Lucey, hossman)

* SOLR-6023: FieldAnalysisRequestHandler throws NPE if no parameters are supplied.
  (shalin)
  
* SOLR-5090: SpellCheckComponent sometimes throws NPE if 
  "spellcheck.alternativeTermCount" is set to zero (James Dyer).

* SOLR-6039: fixed debug output when no results in response
  (Tomás Fernández Löbbe, hossman)


Other Changes
---------------------

* SOLR-5980: AbstractFullDistribZkTestBase#compareResults always returns false
  for shouldFail. (Mark Miller, Gregory Chanan)

* SOLR-5987: Add "collection" to UpdateParams. (Mark Miller, Greg Solovyev)

* SOLR-3862: Add remove" as update option for atomically removing a value 
  from a multivalued field (Jim Musli, Steven Bower, Alaknantha via Erick Erickson) 

* SOLR-5974: Remove ShardDoc.score and use parent's ScoreDoc.score.
  (Tomás Fernández Löbbe via Ryan Ernst)

* SOLR-6025: Replace mentions of CommonsHttpSolrServer with HttpSolrServer and
  StreamingUpdateSolrServer with ConcurrentUpdateSolrServer. (Ahmet Arslan via shalin)

* SOLR-6013: Fix method visibility of Evaluator, refactor DateFormatEvaluator for
  extensibility. (Aaron LaBella via shalin)

* SOLR-6022: Deprecate getAnalyzer() in IndexField and FieldType, and add getIndexAnalyzer().
  (Ryan Ernst)

* SOLR_3671: Fix DIHWriter interface usage so users may implement writers that output
  documents to a location external to Solr (ex. a NoSql db). (Roman Chyla via James Dyer)

Build
---------------------

* SOLR-6006: Separate test and compile scope dependencies in the Solrj and
  Solr contrib ivy.xml files, so that the derived Maven dependencies get
  filled out properly in the corresponding POMs. (Steven Scott, Steve Rowe)

==================  4.8.0 ==================

Versions of Major Components
---------------------
Apache Tika 1.5
Carrot2 3.9.0
Velocity 1.7 and Velocity Tools 2.0
Apache UIMA 2.3.1
Apache ZooKeeper 3.4.6

Upgrading from Solr 4.7
----------------------

* In previous versions of Solr, Terms that exceeded Lucene's MAX_TERM_LENGTH were
  silently ignored when indexing documents.  Begining with Solr 4.8, a document
  an error will be generated when attempting to index a document with a term
  that is too large.  If you wish to continue to have large terms ignored,
  use "solr.LengthFilterFactory" in all of your Analyzers.  See LUCENE-5472 for
  more details.
  
* Solr 4.8 requires Java 7 or greater, Java 8 is verified to be
  compatible and may bring some performance improvements. When using
  Oracle Java 7 or OpenJDK 7, be sure to not use the GA build 147 or
  update versions u40, u45 and u51! We recommend using u55 or later.
  An overview of known JVM bugs can be found on
  http://wiki.apache.org/lucene-java/JavaBugs

* ZooKeeper is upgraded from 3.4.5 to 3.4.6.

* <fields> and <types> tags have been deprecated. There is no longer any reason to
  keep them in the schema file, they may be safely removed. This allows intermixing of
  <fieldType>, <field> and <copyField> definitions if desired. Currently, these tags
  are supported so either style may be implemented. TBD is whether they'll be
  deprecated formally for 5.0


Detailed Change List
----------------------

System Requirements
----------------------

* LUCENE-4747, LUCENE-5514: Move to Java 7 as minimum Java version.
  (Robert Muir, Uwe Schindler)

New Features
----------------------

* SOLR-5130: Implement addReplica Collections API (Noble Paul)

* SOLR-5183: JSON updates now support nested child documents using a 
  "_childDocument_" object key.  (Varun Thacker, hossman)

* SOLR-5714: You can now use one pool of memory for for the HDFS block cache
  that all collections share. (Mark Miller, Gregory Chanan)

* SOLR-5720: Add ExpandComponent to expand results collapsed by the 
  CollapsingQParserPlugin. (Joel Bernstein)

* SOLR-3177: Enable tagging and excluding filters in StatsComponent via the
  localParams syntax. (Mathias H., Nikolai Luthman, Vitaliy Zhovtyuk, shalin)
  
* SOLR-1604: Wildcards, ORs etc inside Phrase Queries. (Ahmet Arslan via Erick Erickson)

* SOLR-5477: Async execution of OverseerCollectionProcessor(CollectionsAPI)
  tasks. (Anshum Gupta)

* SOLR-5865: Provide a MiniSolrCloudCluster to enable easier testing.
 (Greg Chanan via Mark Miller)

* SOLR-5860: Use leaderConflictResolveWait in WaitForState during recovery/startup,
  improve logging and force refresh cluster state every 15 seconds.
  (Timothy Potter via shalin)
  
* SOLR-5749: A new Overseer status collection API exposes overseer queue sizes, timing
  statistics, success and error counts and last N failures per operation. (shalin)

* SOLR-5858: Add a hl.qparser parameter to allow you to define a queryparser
  for hl.q highlight queries. If no queryparser is defined, Solr will use
  the overall query's defType. (Alan Woodward)

* SOLR-4478: Allow cores to use configuration from a configsets directory
  outside their instance directory. (Alan Woodward, Erick Erickson)

* SOLR-5466: A new List collections and cluster status API which clients can use
  to read collection and shard information instead of reading data directly from ZooKeeper.
  (Dave Seltzer, Varun Thacker, Vitaliy Zhovtyuk, Erick Erickson, shalin)

* SOLR-5795: New DocExpirationUpdateProcessorFactory supports computing an expiration 
  date for documents from the "TTL" expression, as well as automatically deleting expired 
  documents on a periodic basis. (hossman)

* SOLR-5829: Allow ExpandComponent to accept query and filter query parameters
  (Joel Bernstein)

* SOLR-5653: Create a RestManager to provide REST API endpoints for
  reconfigurable plugins. (Tim Potter, Steve Rowe)

* SOLR-5655: Create a stopword filter factory that is (re)configurable,
  and capable of reporting its configuration, via REST API.
  (Tim Potter via Steve Rowe)

* SOLR-5654: Create a synonym filter factory that is (re)configurable, and
  capable of reporting its configuration, via REST API.
  (Tim Potter via Steve Rowe)

* SOLR-5960: Add support for basic authentication in post.jar tool, e.g.:
  java -Durl="http://username:password@hostname:8983/solr/update" -jar post.jar sample.xml
  (Sameer Maggon via Uwe Schindler)

* SOLR-4864: RegexReplaceProcessorFactory should support pattern capture group
  substitution in replacement string.
  (Sunil Srinivasan, Jack Krupansky via Steve Rowe)

Bug Fixes
----------------------

* SOLR-5858, SOLR-4812: edismax and dismax query parsers can be used for parsing
  highlight queries. (Alan Woodward, Tien Nguyen Manh)

* SOLR-5893: On restarting overseer designate , move itself to front of the queue (Noble Paul)

* SOLR-5915: Attempts to specify the parserImpl for
  solr.PreAnalyzedField fieldtype failed.  (Mike McCandless)

* SOLR-5943: SolrCmdDistributor does not distribute the openSearcher parameter.
  (ludovic Boutros via shalin)

* SOLR-5954: Slower DataImportHandler process caused by not reusing jdbc
  connections. (Mark Miller, Paco Garcia, Raja Nagendra Kumar)

* SOLR-5897: Upgraded to jQuery 1.7.2, Solr was previously using 1.4.3, the file was 
  mistakenly named 1.7.2 (steffkes)

Optimizations
----------------------
* SOLR-1880: Distributed Search skips GET_FIELDS stage if EXECUTE_QUERY
  stage gets all fields. Requests with fl=id or fl=id,score are now single-pass.
  (Shawn Smith, Vitaliy Zhovtyuk, shalin)

* SOLR-5783: Requests to open a new searcher will now reuse the current registered
  searcher (w/o additional warming) if possible in situations where the underlying 
  index has not changed.  This reduces overhead in situations such as deletes that 
  do not modify the index, and/or redundant commits. (hossman)
  
* SOLR-5884: When recovery is cancelled, any call to the leader to wait to see
  the replica in the right state for recovery should be aborted. (Mark Miller)

Other Changes
---------------------

* SOLR-5909: Upgrade Carrot2 clustering dependency to 3.9.0. (Dawid Weiss)

* SOLR-5764: Fix recently added tests to not use absolute paths to load test-files,
  use SolrTestCaseJ4.getFile() and getResource() instead; fix morphlines/map-reduce
  to not duplicate test resources and fix dependencies among them.
  (Uwe Schindler)
  
* SOLR-5765: Update to SLF4J 1.7.6. (Mark Miller)

* SOLR-5609: If legacy mode is disabled don't let cores create slices/replicas/collections .
  All operations should be performed through collection API (Noble Paul)

* SOLR-5613: Upgrade to commons-codec 1.9 for better BeiderMorseFilter performance.
  (Thomas Champagne, Shawn Heisey via shalin)

* SOLR-5771: Add SolrTestCaseJ4.SuppressSSL annotation to disable SSL (instead of static boolean).
  (Robert Muir)

* SOLR-5799: When registering as the leader, if an existing ephemeral
  registration exists, wait a short time to see if it goes away.
  (Mark Miller)

* LUCENE-5472: IndexWriter.addDocument will now throw an IllegalArgumentException 
  if a Term to be indexed exceeds IndexWriter.MAX_TERM_LENGTH.  To recreate previous
  behavior of silently ignoring these terms, use LengthFilter in your Analyzer.
  (hossman, Mike McCandless, Varun Thacker)

* SOLR-5825: Separate http request creating and execution in SolrJ
  (Steven Bower via Erick Erickson)
  
* SOLR-5837: Add hashCode/equals to SolrDocument, SolrInputDocument
  and SolrInputField for testing purposes. (Varun Thacker, Noble Paul,
  Mark Miller)

* SOLR-5853: The createCollection methods in the test framework now reports
  result of operation in the returned CollectionAdminResponse (janhoy)

* SOLR-5838: Relative SolrHome Path Bug At AbstractFullDistribZkTestBase.
  (Furkan KAMACI via shalin)

* SOLR-5763: Upgrade to Tika 1.5 (Vitaliy Zhovtyuk via Steve Rowe)

* SOLR-5881: Upgrade ZooKeeper to 3.4.6 (Shawn Heisey)

* SOLR-5883: Many tests do not shutdown SolrServer. 
  (Tomás Fernández Löbbe via Mark Miller)

* SOLR-5898: Update to latest Kite Morphlines release: Version 0.12.1. 
  (Mark Miller)

* SOLR-5228: Don't require <field> or <dynamicField> be inside of <fields> -- or
  that <fieldType> be inside of <types>. (Erick Erickson)

* SOLR-5903: SolrCore implements Closeable, cut over to using try-with-resources
  where possible. (Alan Woodward)

* SOLR-5914: Cleanup and fix Solr's test cleanup code. 
 (Mark Miller, Uwe Schindler)

* SOLR-5936: Deprecate non-Trie-based numeric & date field types. (Steve Rowe)

* SOLR-5934: LBHttpSolrServer exception handling improvement and small test
  improvements. (Gregory Chanan via Mark Miller)

* SOLR-5773: CollapsingQParserPlugin should make elevated documents the 
  group head. (David Boychuck, Joel Bernstein)

* SOLR-5937: Modernize the DIH example config sets. (Steve Rowe)

==================  4.7.2  ==================

Versions of Major Components
---------------------
Apache Tika 1.4
Carrot2 3.8.0
Velocity 1.7 and Velocity Tools 2.0
Apache UIMA 2.3.1
Apache ZooKeeper 3.4.5

Detailed Change List
----------------------

Bug Fixes
----------------------

* SOLR-5951: Fixed SolrDispatchFilter to throw useful exception on startup if
  SLF4j logging jars are missing.  (Uwe Schindler, Hossman, Shawn Heisey)

* SOLR-5950: Maven config: make the org.slf4j:slf4j-api dependency transitive
  (i.e., not optional) in all modules in which it's a dependency, including
  solrj, except for the WAR, where it will remain optional.
  (Uwe Schindler, Steve Rowe)

==================  4.7.1  ==================

Versions of Major Components
---------------------
Apache Tika 1.4
Carrot2 3.8.0
Velocity 1.7 and Velocity Tools 2.0
Apache UIMA 2.3.1
Apache ZooKeeper 3.4.5

Detailed Change List
----------------------

Bug Fixes
----------------------

* SOLR-5647: The lib paths in example-schemaless will now load correctly.
  (Paul Westin via Shawn Heisey)

* SOLR-5770: All attempts to match a SolrCore with it's state in clusterstate.json
  should be done with the CoreNodeName. (Steve Davids via Mark Miller)

* SOLR-5875: QueryComponent.mergeIds() unmarshals all docs' sort field values once
  per doc instead of once per shard.
  (Alexey Serba, hoss, Martin de Vries via Steve Rowe)

* SOLR-5800: Admin UI - Analysis form doesn't render results correctly when a
  CharFilter is used. (steffkes)

* SOLR-5870: Admin UI - Reload on Core Admin doesn't show errors (steffkes)

* SOLR-5867: OverseerCollectionProcessor isn't properly generating https urls in some
  cases. (Steve Davids via shalin)

* SOLR-5866: UpdateShardHandler needs to use the system default scheme registry to
  properly handle https via javax.net.ssl.* properties. (Steve Davids via shalin)
  
* SOLR-5782: The full MapReduceIndexer help text does not display when using --help.
  (Mark Miller, Wolfgang Hoschek)

* SOLR-5824: Merge up Solr MapReduce contrib code to latest external changes.
  Includes a few minor bug fixes.
  (Mark Miller)

* SOLR-5818: distrib search with custom comparator does not quite work correctly
  (Ryan Ernst)

* SOLR-5895: JavaBinLoader hides IOExceptions. (Mike Sokolov via shalin)

* SOLR-5861: Recovery should not set onlyIfLeaderActive=true for slice in 'recovery'
  state. (shalin)

* SOLR-5423: CSV output doesn't include function field
  (Arun Kumar, hossman, Steve Rowe)

* SOLR-5550: shards.info is not returned by a short circuited distributed query.
  (Timothy Potter, shalin)

* SOLR-5777: Fix ordering of field values in JSON updates where
  field name key is repeated (hossman)

* SOLR-5734: We should use System.nanoTime rather than System.currentTimeMillis
  when calculating elapsed time. (Mark Miller, Ramkumar Aiyengar)

* SOLR-5760: ConcurrentUpdateSolrServer has a blockUntilFinished call when
  streamDeletes is true that should be tucked into the if statement below it.
  (Mark Miller, Gregory Chanan)

* SOLR-5761: HttpSolrServer has a few fields that can be set via setters but
  are not volatile. (Mark Miller, Gregory Chanan)

* SOLR-5907: The hdfs write cache can cause a reader to see a corrupted state.
  It now defaults to off, and if you were using solr.hdfs.blockcache.write.enabled
  explicitly, you should set it to false.
  (Mark Miller)

* SOLR-5811: The Overseer will retry work items until success, which is a serious
  problem if you hit a bad work item. (Mark Miller)

* SOLR-5796: Increase how long we are willing to wait for a core to see the ZK
  advertised leader in it's local state. (Timothy Potter, Mark Miller)  

* SOLR-5834: Overseer threads are only being interrupted and not closed.
  (hossman, Mark Miller)

* SOLR-5839: ZookeeperInfoServlet does not trim path properly.
  (Furkan KAMACI via Mark Miller)

* SOLR-5874: Unsafe cast in CloudSolrServer's RouteException. Change
  RouteException to handle Throwable rather than Exception.
  (Mark Miller, David Arthur)

* SOLR-5899: CloudSolrServer's RouteResponse and RouteException should be
  publicly accessible. (Mark Miller, shalin)

* SOLR-5905: CollapsingQParserPlugin throws a NPE if required 'field' param is missing.
  (Spyros Kapnissis via shalin)

* SOLR-5906: Collection create API ignores property.instanceDir parameter.
  (Varun Thacker, shalin)

* SOLR-5920: Distributed sort on DateField, BoolField and BCD{Int,Long,Str}Field
  returns string cast exception (Eric Bus, AJ Lemke, hossman, Steve Rowe)

Other Changes
---------------------

* SOLR-5796: Make how long we are willing to wait for a core to see the ZK
  advertised leader in it's local state configurable. 
  (Timothy Potter via Mark Miller)

==================  4.7.0 ==================

Versions of Major Components
---------------------
Apache Tika 1.4
Carrot2 3.8.0
Velocity 1.7 and Velocity Tools 2.0
Apache UIMA 2.3.1
Apache ZooKeeper 3.4.5

Upgrading from Solr 4.6.0
----------------------

* CloudSolrServer and LBHttpSolrServer no longer declare MalformedURLException
  as thrown from their constructors.  

* Due to a bug in previous versions the default value of the 'discountOverlap' property
  of DefaultSimilarity was not being set appropriately if you were using the implicit
  DefaultSimilarityFactory instead of explicitly configuring it.  To preserve 
  consistent behavior for people who upgrade, the implicit behavior is now contingent 
  on the <luceneMatchVersion/> -- discountOverlap=false for 4.6 and below, 
  discountOverlap=true for 4.7 and above.  See SOLR-5561 for more information.
                      
Detailed Change List
----------------------

New Features
----------------------

* SOLR-5308: SOLR-5601: SOLR-5710: A new 'migrate' collection API to split all
  documents with a route key into another collection (shalin)

* SOLR-5441: Expose number of transaction log files and their size via JMX.
  (Rafał Kuć via shalin)

* SOLR-5320: Added support for tri-level compositeId routing.
  (Anshum Gupta via shalin)
  
* SOLR-5287,SOLR-5522,SOLR-5446,SOLR-5456,SOLR-5539,SOLR-5458:
  Admin UI - Added a new "Files" conf directory browser/file viewer.
  (steffkes, Erick Erickson)

* SOLR-5447, SOLR-5490: Add a QParserPlugin for Lucene's SimpleQueryParser.
  (Jack Conradson via shalin)

* SOLR-5208: Support for the setting of core.properties key/values at create-time on
  Collections API (Erick Erickson)

* SOLR-5428: SOLR-5690: New 'stats.calcdistinct' parameter in StatsComponent returns
  set of distinct values and their count. This can also be specified per field
  e.g. 'f.field.stats.calcdistinct'. (Elran Dvir via shalin)

* SOLR-5378, SOLR-5528: A new SuggestComponent that fully utilizes the Lucene suggester
  module and adds pluggable dictionaries, payloads and better distributed support.
  This is intended to eventually replace the Suggester support through the
  SpellCheckComponent. (Areek Zillur, Varun Thacker via shalin)

* SOLR-5492: Return the replica that actually served the query in shards.info
  response. (shalin)

* SOLR-5506: Support docValues in CollationField and ICUCollationField.
  (Robert Muir)

* SOLR-5023: Add support for deleteInstanceDir to be passed from SolrJ for Core
  Unload action. (Lyubov Romanchuk, shalin)

* SOLR-1871: The 'map' function query accepts a ValueSource as target and
  default value. (Chris Harris, shalin)

* SOLR-5556: Allow class of CollectionsHandler and InfoHandler to be specified
  in solr.xml. (Gregory Chanan, Alan Woodward)

* SOLR-5581: Give ZkCLI the ability to get files. (Gregory Chanan via Mark Miller)

* SOLR-5536: Add ValueSource collapse criteria to CollapsingQParsingPlugin (Joel Bernstein)

* SOLR-5541: Allow QueryElevationComponent to accept elevateIds and excludeIds 
  as http parameters (Joel Bernstein)

* SOLR-5463: new 'cursorMark' request param for deep paging of sorted result sets
  (sarowe, hossman)

* SOLR-5529: Add support for queries to use multiple suggesters.
  (Areek Zillur, Erick Erickson, via Robert Muir)

* SOLR-1301: Add a Solr contrib that allows for building Solr indexes via
  Hadoop's MapReduce. (Matt Revelle, Alexander Kanarsky, Steve Rowe,
  Mark Miller, Greg Bowyer, Jason Rutherglen, Kris Jirapinyo, Jason Venner ,
  Andrzej Bialecki, Patrick Hunt, Wolfgang Hoschek, Roman Shaposhnik,
  Eric Wong)

* SOLR-5631: Add support for Lucene's FreeTextSuggester.
  (Areek Zillur via Robert Muir)

* SOLR-5695: Add support for Lucene's BlendedInfixSuggester.
  (Areek Zillur)
  
* SOLR-5476: Overseer Role for nodes (Noble Paul)

* SOLR-5594: Allow FieldTypes to specify custom PrefixQuery behavior
  (Anshum Gupta via hossman)

* LUCENE-5395: Upgrade to Spatial4j 0.4. Various new options are now exposed
  automatically for an RPT field type.  See Spatial4j CHANGES & javadocs.
  https://github.com/spatial4j/spatial4j/blob/master/CHANGES.md  (David Smiley)

* SOLR-5670: allow _version_ to use DocValues.  (Per Steffensen via yonik)

* SOLR-5535: Set "partialResults" header for shards that error out if
  shards.tolerant is specified. (Steve Davids via shalin)

* SOLR-5610: Support cluster-wide properties with an API called CLUSTERPROP (Noble Paul)

* SOLR-5623: Better diagnosis of RuntimeExceptions in analysis
  (Benson Margulies)

* SOLR-5530: Added a NoOpResponseParser for SolrJ which puts the entire raw
  response into an entry in the NamedList.
  (Upayavira, Vitaliy Zhovtyuk via shalin)

* SOLR-5682: Make the admin InfoHandler more pluggable / derivable.
  (Greg Chanan via Mark Miller)

* SOLR-5672: Add logParamsList parameter to support reduced logging.
  (Christine Poerschke via Mark Miller)

* SOLR-3854: SSL support for SolrCloud. (Sami Siren, hossman, Steve Davids, 
  Alexey Serba, Mark Miller)

Bug Fixes
----------------------

* SOLR-5438: DebugComponent throws NPE when used with grouping.
  (Tomás Fernández Löbbe via shalin)

* SOLR-4612: Admin UI - Analysis Screen contains empty table-columns (steffkes)

* SOLR-5451: SyncStrategy closes it's http connection manager before the
  executor that uses it in it's close method. (Mark Miller)

* SOLR-5460: SolrDispatchFilter#sendError can get a SolrCore that it does not 
  close. (Mark Miller)

* SOLR-5461: Request proxying should only set con.setDoOutput(true) if the
  request is a post. (Mark Miller)

* SOLR-5481: SolrCmdDistributor should not let the http client do it's own 
  retries. (Mark Miller)

* LUCENE-5347: Fixed Solr's Zookeeper Client to copy files to Zookeeper using
  binary transfer. Previously data was read with default encoding and stored
  in zookeeper as UTF-8. This bug was found after upgrading to forbidden-apis
  1.4.  (Uwe Schindler)

* SOLR-4376: DataImportHandler uses wrong date format for last_index_time if
  a delta-import is run first before any full-imports.
  (Sebastien Lorber, Arcadius Ahouansou via shalin)

* SOLR-5494: CoreContainer#remove throws NPE rather than returning null when
  a SolrCore does not exist in core discovery mode. (Mark Miller)
  
* SOLR-5354: Distributed sort is broken with CUSTOM FieldType. 
  (Steve Rowe, hossman, Robert Muir, Jessica Cheng)

* SOLR-5515: NPE when getting stats on date field with empty result on
  SolrCloud. (Alexander Sagen, shalin)

* SOLR-5204: StatsComponent and SpellCheckComponent do not support the
  shards.tolerant=true parameter. (Anca Kopetz, shalin)

* SOLR-5527: DIH logs spurious warning for special commands. (shalin)

* SOLR-5524: Exception when using Query Function inside Scale Function.
  (Trey Grainger, yonik)

* SOLR-5562: ConcurrentUpdateSolrServer constructor ignores supplied httpclient.
  (Kyle Halliday via Mark Miller)

* SOLR-5567: ZkController getHostAddress duplicates url prefix.
  (Kyle Halliday, Alexey Serba, shalin)

* SOLR-4992: Solr eats OutOfMemoryError exceptions in many cases.
  (Mark Miller, Daniel Collins)  

* LUCENE-5399, SOLR-5354 sort wouldn't work correctly with
  distributed searching for some field types such as legacy numeric
  types (Rob Muir, Mike McCandless)

* SOLR-5643: ConcurrentUpdateSolrServer will sometimes not spawn a new Runner
  thread even though there are updates in the queue. (Mark Miller)

* SOLR-5650: When a replica becomes a leader, only peer sync with other replicas
  that last published an ACTIVE state. (Mark Miller)

* SOLR-5657: When a SolrCore starts on HDFS, it should gracefully handle HDFS
  being in safe mode. (Mark Miller)

* SOLR-5663: example-DIH uses non-existing column for mapping (case-sensitive)
  (steffkes)

* SOLR-5666: Using the hdfs write cache can result in appearance of corrupted
  index. (Mark Miller)

* SOLR-5230: Call DelegatingCollector.finish() during grouping.
  (Joel Bernstein, ehatcher)

* SOLR-5679: Shard splitting fails with ClassCastException on collections
  upgraded from 4.5 and earlier versions. (Brett Hoerner, shalin)

* SOLR-5673: HTTPSolrServer doesn't set own property correctly in
  setFollowRedirects. (Frank Wesemann via shalin)

* SOLR-5676: SolrCloud updates rejected if talking to secure ZooKeeper.
  (Greg Chanan via Mark Miller)

* SOLR-5634: SolrJ GroupCommand.getNGroups returns null if group.format=simple
  and group.ngroups=true. (Artem Lukanin via shalin)

* SOLR-5667: Performance problem when not using hdfs block cache. (Mark Miller)

* SOLR-5526: Fixed NPE that could arrise when explicitly configuring some built 
  in QParserPlugins (Nikolay Khitrin, Vitaliy Zhovtyuk, hossman)

* SOLR-5598: LanguageIdentifierUpdateProcessor ignores all but the first value
  of multiValued string fields. (Andreas Hubold, Vitaliy Zhovtyuk via shalin)

* SOLR-5593: Replicas should accept the last updates from a leader that has just 
  lost it's connection to ZooKeeper. (Christine Poerschke via Mark Miller)

* SOLR-5678: SolrZkClient should throw a SolrException when connect times out
  rather than a RuntimeException. (Karl Wright, Anshum Gupta, Mark Miller)

* SOLR-4072: Error message is incorrect for linkconfig in ZkCLI.
  (Vamsee Yarlagadda, Adam Hahn, via Mark Miller)

* SOLR-5691: Sharing non thread safe WeakHashMap across thread can cause
  problems. (Bojan Smid, Mark Miller)

* SOLR-5693: Running on HDFS does work correctly with NRT search. (Mark Miller)

* SOLR-5644: SplitShard does not handle not finding a shard leader well.
  (Mark Miller, Anshum Gupta via shalin)

* SOLR-5704: coreRootDirectory was not respected when creating new cores
  via CoreAdminHandler (Jesse Sipprell, Alan Woodward)

* SOLR-5709: Highlighting grouped duplicate docs from different shards with
  group.limit > 1 throws ArrayIndexOutOfBoundsException. (Steve Rowe)

* SOLR-5561: Fix implicit DefaultSimilarityFactory initialization in IndexSchema 
  to properly specify discountOverlap option.
  (Isaac Hebsh, Ahmet Arslan, Vitaliy Zhovtyuk, hossman)

* SOLR-5689: On reconnect, ZkController cancels election on first context rather
  than latest. (Gregory Chanan, Mark Miller via shalin)

* SOLR-5649: Clean up some minor ConnectionManager issues. 
  (Mark Miller, Gregory Chanan)

* SOLR-5365: Fix bug with compressed files in ExtractingRequestHandler by
  upgrading commons-compress to 1.7 (Jan Høydahl, hossman)

* SOLR-5675: cloud-scripts/zkcli.bat: quote option log4j
  (Günther Ruck via steffkes

* SOLR-5721: ConnectionManager can become stuck in likeExpired.
  (Gregory Chanan via Mark Miller)
  
* SOLR-5731: In ConnectionManager, we should catch and only log exceptions
  from BeforeReconnect. (Mark Miller)

* SOLR-5718: Make LBHttpSolrServer zombie checks non-distrib and non-scoring.
  (Christine Poerschke via Mark Miller)

* SOLR-5727: LBHttpSolrServer should only retry on Connection exceptions when 
  sending updates. Affects CloudSolrServer. (Mark Miller)

* SOLR-5739: Sub-shards created by shard splitting have their update log set
  to buffering mode on restarts. (Günther Ruck, shalin)

* SOLR-5741: UpdateShardHandler was not correctly setting max total connections
  on the HttpClient. (Shawn Heisey)

* SOLR-5620: ZKStateReader.aliases should be volatile to ensure all threads see
  the latest aliases. (Ramkumar Aiyengar via Mark Miller)

* SOLR-5448: ShowFileRequestHandler treats everything as Directory, when in
  Cloud-Mode. (Erick Erickson, steffkes)

Optimizations
----------------------

* SOLR-5436: Eliminate the 1500ms wait in overseer loop as well as
  polling the ZK distributed queue. (Noble Paul, Mark Miller)

* SOLR-5189: Solr 4.x Web UI Log Viewer does not display 'date' column from 
  logs (steffkes)

* SOLR-5512: Optimize DocValuesFacets. (Robert Muir)

* SOLR-2960: fix DIH XPathEntityProcessor to add the correct number of "null"
  placeholders for multi-valued fields (Michael Watts via James Dyer)

* SOLR-5214: Reduce memory usage for shard splitting by merging segments one
  at a time. (Christine Poerschke via shalin)

* SOLR-4227: Wrap XML RequestWriter's OutputStreamWriter in a BufferedWriter
  to avoid frequent converter invocations. (Conrad Herrmann, shalin)

* SOLR-5624: Enable QueryResultCache for CollapsingQParserPlugin.
  (David Boychuck, Joel Bernstein)

* LUCENE-5440: DocSet decoupled from OpenBitSet. DocSetBase moved to use 
  FixedBitSet instead of OpenBitSet. As a result BitDocSet now only works 
  with FixedBitSet. (Shai Erera)

Other Changes
---------------------

* SOLR-5399: Add distributed request tracking information to DebugComponent
  (Tomás Fernández Löbbe via Ryan Ernst)

* SOLR-5421: Remove double set of distrib.from param in processAdd method of
  DistributedUpdateProcessor. (Anshum Gupta via shalin)

* SOLR-5404: The example config references deprecated classes.
  (Uwe Schindler, Rafał Kuć  via Mark Miller)

* SOLR-5487: Replication factor error message doesn't match constraint.
  (Patrick Hunt via shalin)

* SOLR-5499: Log a warning if /get is not registered when using SolrCloud.
  (Daniel Collins via shalin)

* SOLR-5517: Return HTTP error on POST requests with no Content-Type.
  (Ryan Ernst, Uwe Schindler)

* SOLR-5502: Added a test for tri-level compositeId routing with documents
  having a "/" in a document id. (Anshum Gupta via Mark Miller)

* SOLR-5533: Improve out of the box support for running Solr on hdfs with
  SolrCloud. (Mark Miller)

* SOLR-5548: Give DistributedSearchTestCase / JettySolrRunner the ability to 
  specify extra filters. (Greg Chanan via Mark Miller)

* SOLR-5555: LBHttpSolrServer and CloudSolrServer constructors don't need to
  declare MalformedURLExceptions (Sushil Bajracharya, Alan Woodward)

* SOLR-5565: Raise default ZooKeeper session timeout to 30 seconds from 15
  seconds. (Mark Miller)

* SOLR-5574: CoreContainer shutdown publishes all nodes as down and waits to
  see that and then again publishes all nodes as down. (Mark Miller)

* SOLR-5590: Upgrade HttpClient/HttpComponents to 4.3.x.
  (Karl Wright via Shawn Heisey)

* SOLR-2794: change the default of hl.phraseLimit to 5000.
  (Michael Della Bitta via Robert Muir, Koji, zarni - pull request #11)

* SOLR-5632: Improve response message for reloading a non-existent core.
  (Anshum Gupta via Mark Miller)

* SOLR-5633: HttpShardHandlerFactory should make its http client available to subclasses.
  (Ryan Ernst)

* SOLR-5684: Shutdown SolrServer clients created in BasicDistributedZk2Test and
  BasicDistributedZkTest. (Tomás Fernández Löbbe via shalin)

* SOLR-5629: SolrIndexSearcher.name should include core name.
  (Shikhar Bhushan via shalin)

* SOLR-5702: Log config name found for collection at info level.
  (Christine Poerschke via Mark Miller)

* SOLR-5659: Add test for compositeId ending with an '!'.
  (Markus Jelsma, Anshum Gupta via shalin)

* SOLR-5700: Improve error handling of remote queries (proxied requests).
  (Greg Chanan, Steve Davids via Mark Miller)

* SOLR-5585: Raise Collections API timeout to 3 minutes from one minute.
  (Mark Miller)

* SOLR-5257: Improved error/warn messages when Update XML contains unexpected XML nodes
  (Vitaliy Zhovtyuk, hossman)


==================  4.6.1  ==================

Versions of Major Components
---------------------
Apache Tika 1.4
Carrot2 3.8.0
Velocity 1.7 and Velocity Tools 2.0
Apache UIMA 2.3.1
Apache ZooKeeper 3.4.5

Detailed Change List
----------------------

Bug Fixes
----------------------

* SOLR-5408: CollapsingQParserPlugin scores incorrectly when multiple sort criteria are used
  (Brandon Chapman, Joel Bernstein)

* SOLR-5416: CollapsingQParserPlugin breaks Tag/Exclude Faceting (David Boychuck, Joel Bernstein)

* SOLR-5442: Python client cannot parse proxied response when served by Tomcat.
  (Patrick Hunt, Gregory Chanan, Vamsee Yarlagadda, Romain Rigaux, Mark Miller)

* SOLR-5445: Proxied responses should propagate all headers rather than the 
  first one for each key. (Patrick Hunt, Mark Miller) 

* SOLR-5479: SolrCmdDistributor retry logic stops if a leader for the request 
  cannot be found in 1 second. (Mark Miller)

* SOLR-5532: SolrJ Content-Type validation is too strict for some
  webcontainers / proxies. (Jakob Furrer, hossman, Shawn Heisey, Uwe Schindler,
  Mark Miller)

* SOLR-5547: Creating a collection alias using SolrJ's CollectionAdminRequest
  sets the alias name and the collections to alias to the same value.
  (Aaron Schram, Mark Miller)

* SOLR-5577: Likely ZooKeeper expiration should not slow down updates a given
  amount, but instead cut off updates after a given time. 
  (Mark Miller, Christine Poerschke, Ramkumar Aiyengar)
  
* SOLR-5580: NPE when creating a core with both explicit shard and coreNodeName.
  (YouPeng Yang, Mark Miller)

* SOLR-5552: Leader recovery process can select the wrong leader if all replicas 
  for a shard are down and trying to recover as well as lose updates that should 
  have been recovered. (Timothy Potter, Mark Miller)
  
* SOLR-5569 A replica should not try and recover from a leader until it has 
  published that it is ACTIVE. (Mark Miller)
  
* SOLR-5568 A SolrCore cannot decide to be the leader just because the cluster
  state says no other SolrCore's are active. (Mark Miller)

* SOLR-5496: We should share an http connection manager across non search 
  HttpClients and ensure all http connection managers get shutdown.
  (Mark Miller)

* SOLR-5583: ConcurrentUpdateSolrServer#blockUntilFinished may wait forever if
  the executor service is shutdown. (Mark Miller)

* SOLR-5586: All ZkCmdExecutor's should be initialized with the zk client
  timeout. (Mark Miller)

* SOLR-5587: ElectionContext implementations should use 
  ZkCmdExecutor#ensureExists to ensure their election paths are properly
  created. (Mark Miller)

* SOLR-5540: HdfsLockFactory should explicitly create the lock parent directory if 
  necessary. (Mark Miller)
  
* SOLR-4709: The core reload after replication if config files have changed
  can fail due to a race condition. (Mark Miller, Hossman)

* SOLR-5503: Retry 'forward to leader' requests less aggressively - rather 
  than on IOException and status 500, ConnectException. (Mark Miller)

* SOLR-5588: PeerSync doesn't count all connect failures as success.
  (Mark Miller)

* SOLR-5564: hl.maxAlternateFieldLength should apply to original field when
  fallback is attempted (janhoy)

* SOLR-5608: Don't allow a closed SolrCore to publish state to ZooKeeper.
  (Mark Miller, Shawn Heisey)

* SOLR-5615: Deadlock while trying to recover after a ZK session expiration.
  (Ramkumar Aiyengar, Mark Miller)

* SOLR-5543: Core swaps resulted in duplicate core entries in solr.xml when
  using solr.xml persistence. (Bill Bell, Alan Woodward)

* SOLR-5618: Fix false cache hits in queryResultCache when hashCodes are equal 
  and duplicate filter queries exist in one of the requests (hossman)

* SOLR-4260: ConcurrentUpdateSolrServer#blockUntilFinished can return before
  all previously added updates have finished. This could cause distributed
  updates meant for replicas to be lost. (Markus Jelsma, Timothy Potter,
  Joel Bernstein, Mark Miller)

* SOLR-5645: A SolrCore reload via the CoreContainer will try and register in
  zk again with the new SolrCore. (Mark Miller)

* SOLR-5636: SolrRequestParsers does some xpath lookups on every request, which
  can cause concurrency issues. (Mark Miller)

* SOLR-5658: commitWithin and overwrite are not being distributed to replicas
  now that SolrCloud uses javabin to distribute updates.
  (Mark Miller, Varun Thacker, Elodie Sannier, shalin)

Optimizations
----------------------  

* SOLR-5576: Improve concurrency when registering and waiting for all 
  SolrCore's to register a DOWN state. (Christine Poerschke via Mark Miller)

==================  4.6.0 ==================

Versions of Major Components
---------------------
Apache Tika 1.4
Carrot2 3.8.0
Velocity 1.7 and Velocity Tools 2.0
Apache UIMA 2.3.1
Apache ZooKeeper 3.4.5

Upgrading from Solr 4.5.0
----------------------

* If you are using methods from FieldMutatingUpdateProcessorFactory for getting
  configuration information (oneOrMany or getBooleanArg), those methods have
  been moved to NamedList and renamed to removeConfigArgs and removeBooleanArg,
  respectively.  The original methods are deprecated, to be removed in 5.0.
  See SOLR-5264.

Detailed Change List
----------------------

New Features
----------------------

* SOLR-5167: Add support for AnalyzingInfixSuggester (AnalyzingInfixLookupFactory).
  (Areek Zillur, Varun Thacker via Robert Muir)

* SOLR-5246: Shard splitting now supports collections configured with router.field.
  (shalin)
 
* SOLR-5274: Allow JettySolrRunner SSL config to be specified via a constructor.
  (Mark Miller)

* SOLR-5300: Shards can be split by specifying arbitrary number of hash ranges
  within the shard's hash range. (shalin)

* SOLR-5226: Add Lucene index heap usage to the Solr admin UI. 
  (Areek Zillur via Robert Muir)

* SOLR-5324: Make sub shard replica recovery and shard state switch asynchronous.
  (Yago Riveiro, shalin)

* SOLR-5338: Split shards by a route key using split.key parameter. (shalin)

* SOLR-5353: Enhance CoreAdmin api to split a route key's documents from an index
  and leave behind all other documents. (shalin)

* SOLR-5027: CollapsingQParserPlugin for high performance field collapsing on high cardinality fields.
  (Joel Bernstein)

* SOLR-5395: Added a RunAlways marker interface for UpdateRequestProcessorFactory 
  implementations indicating that they should not be removed in later stages
  of distributed updates (usually signalled by the update.distrib parameter)
  (yonik)

 * SOLR-5310: Add a collection admin command to remove a replica (noble)

 * SOLR-5311: Avoid registering replicas which are removed (noble)

 * SOLR-5406: CloudSolrServer failed to propagate request parameters
   along with delete updates. (yonik)

 * SOLR-5374: Support user configured doc-centric versioning rules
   via the optional DocBasedVersionConstraintsProcessorFactory
   update processor (Hossman, yonik)

*  SOLR-5392: Extend solrj apis to cover collection management.
   (Roman Shaposhnik via Mark Miller)
   
* SOLR-5084: new field type EnumField. (Elran Dvir via Erick Erickson)

* SOLR-5464: Add option to ConcurrentSolrServer to stream pure delete 
   requests. (Mark Miller)
  
Bug Fixes
----------------------
  
* SOLR-5216: Document updates to SolrCloud can cause a distributed deadlock.
  (Mark Miller)

* SOLR-5367: Unmarshalling delete by id commands with JavaBin can lead to class cast 
  exception. (Mark Miller)

* SOLR-5359: ZooKeeper client is not closed when it fails to connect to an ensemble.
  (Mark Miller, Klaus Herrmann)

* SOLR-5042: MoreLikeThisComponent was using the rows/count value in place of
  flags, which caused a number of very strange issues, including NPEs and
  ignoring requests for the results to include the score.
  (Anshum Gupta, Mark Miller, Shawn Heisey)

* SOLR-5371: Solr should consistently call SolrServer#shutdown (Mark Miller)

* SOLR-5363: Solr doesn't start up properly with Log4J2 (Petar Tahchiev via Alan
  Woodward)

* SOLR-5380: Using cloudSolrServer.setDefaultCollection(collectionId) does not
  work as intended for an alias spanning more than 1 collection. 
  (Thomas Egense, Shawn Heisey, Mark Miller)

* SOLR-5418: Background merge after field removed from solr.xml causes error. 
  (Reported on user's list, Robert M's patch via Erick Erickson)
  
* SOLR-5318: Creating a core via the admin API doesn't respect transient property
   (Olivier Soyez via Erick Erickson)

* SOLR-5388: Creating a new core via the HTTP API that results in a transient being
  unloaded results in a " Too many close [count:-1]" error.
  (Olivier Soyez via Erick Erickson)

* SOLR-5453: Raise recovery socket read timeouts. (Mark Miller)

* SOLR-5397: Replication can fail silently in some cases. (Mark Miller)

* SOLR-5465: SolrCmdDistributor retry logic has a concurrency race bug. 
  (Mark Miller)
  
* SOLR-5452: Do not attempt to proxy internal update requests. (Mark Miller)

Optimizations
----------------------  

* SOLR-5232: SolrCloud should distribute updates via streaming rather than buffering.
  (Mark Miller)

* SOLR-5223: SolrCloud should use the JavaBin binary format for communication by default. 
  (Mark Miller)

* SOLR-5370: Requests to recover when an update fails should be done in 
  background threads. (Mark Miller)

* LUCENE-5300,LUCENE-5304: Specialized faceting for fields which are declared as
  multi-valued in the schema but are actually single-valued. (Adrien Grand)
  
Security
----------------------

* SOLR-4882: SolrResourceLoader was restricted to only allow access to resource
  files below the instance dir. The reason for this is security related: Some
  Solr components allow to pass in resource paths via REST parameters
  (e.g. XSL stylesheets, velocity templates,...) and load them via resource
  loader. For backwards compatibility, this security feature can be disabled
  by a new system property: solr.allow.unsafe.resourceloading=true
  (Uwe Schindler)

Other Changes
----------------------

* SOLR-5237: Add indexHeapUsageBytes to LukeRequestHandler, indicating how much
  heap memory is being used by the underlying Lucene index structures.
  (Areek Zillur via Robert Muir)

* SOLR-5241: Fix SimplePostToolTest performance problem - implicit DNS lookups
  (hossman)

* SOLR-5273: Update HttpComponents to 4.2.5 and 4.2.6. (Mark Miller)

* SOLR-5264: Move methods for getting config information from
             FieldMutatingUpdateProcessorFactory to NamedList. (Shawn Heisey)

* SOLR-5319: Remove unused and incorrect router name from Collection ZK nodes.
  (Jessica Cheng via shalin)

* SOLR-5321: Remove unnecessary code in Overseer.updateState method which tries to
  use router name from message where none is ever sent. (shalin)

* SOLR-5401: SolrResourceLoader logs a warning if a deprecated (factory) class
  is used in schema or config.  (Uwe Schindler)
  
* SOLR-3397: Warn if master or slave replication is enabled in SolrCloud mode. (Erick
  Erickson)

==================  4.5.1 ==================

Versions of Major Components
---------------------
Apache Tika 1.4
Carrot2 3.8.0
Velocity 1.7 and Velocity Tools 2.0
Apache UIMA 2.3.1
Apache ZooKeeper 3.4.5

Detailed Change List
----------------------

Bug Fixes
----------------------

* SOLR-4590: Collections API should return a nice error when not in SolrCloud mode.
  (Anshum Gupta, Mark Miller)

* SOLR-5295: The CREATESHARD collection API creates maxShardsPerNode number of
  replicas if replicationFactor is not specified. (Brett Hoerner, shalin)

* SOLR-5296: Creating a collection with implicit router adds shard ranges
  to each shard. (shalin)

* SOLR-5263: Fix CloudSolrServer URL cache update race. (Jessica Cheng, Mark Miller)

* SOLR-5297: Admin UI - Threads Screen missing Icon (steffkes)

* SOLR-5301: DELETEALIAS command prints CREATEALIAS in logs (janhoy)

* SOLR-5255: Remove unnecessary call to fetch and watch live nodes in ZkStateReader
  cluster watcher. (Jessica Cheng via shalin)

* SOLR-5305: Admin UI - Reloading System-Information on Dashboard does not work
  anymore (steffkes)

* SOLR-5314: Shard split action should use soft commits instead of hard commits
  to make sub shard data visible. (Kalle Aaltonen, shalin)

* SOLR-5327: SOLR-4915, "The root cause should be returned to the user when a SolrCore create
  call fails", was reverted. (Mark Miller)

* SOLR-5317: SolrCore persistence bugs if defining SolrCores in solr.xml.
  (Mark Miller, Yago Riveiro)

 * SOLR-5306: Extra collection creation parameters like collection.configName are
  not being respected. (Mark Miller, Liang Tianyu, Nathan Neulinger)

* SOLR-5325: ZooKeeper connection loss can cause the Overseer to stop processing
  commands. (Christine Poerschke, Mark Miller, Jessica Cheng)

* SOLR-4327: HttpSolrServer can leak connections on errors. (Karl Wright, Mark Miller)

* SOLR-5349: CloudSolrServer - ZK timeout arguments passed to ZkStateReader are flipped.
  (Ricardo Merizalde via shalin)

* SOLR-5330: facet.method=fcs on single values fields could sometimes result
  in incorrect facet labels. (Michael Froh, yonik)


Other Changes
----------------------

* SOLR-5323: Disable ClusteringComponent by default in collection1 example.
  The solr.clustering.enabled system property needs to be set to 'true'
  to enable the clustering contrib (reverts SOLR-4708). (Dawid Weiss)

==================  4.5.0 ==================

Versions of Major Components
---------------------
Apache Tika 1.4
Carrot2 3.8.0
Velocity 1.7 and Velocity Tools 2.0
Apache UIMA 2.3.1
Apache ZooKeeper 3.4.5

Upgrading from Solr 4.4.0
----------------------

* XML configuration parsing is now more strict about situations where a single
  setting is allowed but multiple values are found.  In the past, one value
  would be chosen arbitrarily and silently.  Starting with 4.5, configuration 
  parsing will fail with an error in situations like this.  If you see error 
  messages such as "solrconfig.xml contains more than one value for config path: 
  XXXXX" or "Found Z configuration sections when at most 1 is allowed matching 
  expression: XXXXX" check your solrconfig.xml file for multiple occurrences of 
  XXXXX and delete the ones that you do not wish to use.  See SOLR-4953 & 
  SOLR-5108 for more details.

* In the past, schema.xml parsing would silently ignore "default" or "required" 
  options specified on <dynamicField/> declarations.  Begining with 4.5, attempting
  to do configured these on a dynamic field will cause an init error.  If you 
  encounter one of these errors when upgrading an existing schema.xml, you can 
  safely remove these attributes, regardless of their value, from your config and 
  Solr will continue to bahave exactly as it did in previous versions.  See 
  SOLR-5227 for more details.

* The UniqFieldsUpdateProcessorFactory has been improved to support all of the
  FieldMutatingUpdateProcessorFactory selector options.  The <lst named="fields"> 
  init param option is now deprecated and should be replaced with the more standard
  <arr name="fieldName">.  See SOLR-4249 for more details.

* UpdateRequestExt has been removed as part of SOLR-4816. You should use UpdateRequest 
  instead.
  
* CloudSolrServer can now use multiple threads to add documents by default. This is a
  small change in runtime semantics when using the bulk add method - you will still
  end up with the same exception on a failure, but some documents beyond the one that
  failed may have made it in. To get the old, single threaded behavior, set parallel updates
  to false on the CloudSolrServer instance.  

Detailed Change List
----------------------

New Features
----------------------

* SOLR-5219: Rewritten selection of the default search and document clustering 
  algorithms. (Dawid Weiss)

* SOLR-5202: Support easier overrides of Carrot2 clustering attributes via 
  XML data sets exported from the Workbench. (Dawid Weiss)

* SOLR-5126: Update Carrot2 clustering to version 3.8.0, update Morfologik 
  to version 1.7.1 (Dawid Weiss)

* SOLR-2345: Enhanced geodist() to work with an RPT field, provided that the
  field is referenced via 'sfield' and the query point is constant.
  (David Smiley)

* SOLR-5082: The encoding of URL-encoded query parameters can be changed with
  the "ie" (input encoding) parameter, e.g. "select?q=m%FCller&ie=ISO-8859-1".
  The default is UTF-8. To change the encoding of POSTed content, use the
  "Content-Type" HTTP header.  (Uwe Schindler, Shawn Heisey)
  
* SOLR-4221: Custom sharding (Noble Paul)

* SOLR-4808: Persist and use router,replicationFactor and maxShardsPerNode at Collection 
  and Shard level (Noble Paul, Shalin Mangar)

* SOLR-5006: CREATESHARD command for 'implicit' shards (Noble Paul)

* SOLR-5017: Allow sharding based on the value of a field (Noble Paul)

* SOLR-4222: create custom sharded collection via collections API (Noble Paul)

* SOLR-4718: Allow solr.xml to be stored in ZooKeeper. (Mark Miller, Erick Erickson)

* SOLR-5156: Enhance ZkCLI to allow uploading of arbitrary files to ZK. (Erick Erickson)

* SOLR-5165: Single-valued docValues fields no longer require a default value.
  Additionally they work with sortMissingFirst, sortMissingLast, facet.missing, 
  exists() in function queries, etc.  (Robert Muir)

* SOLR-5182: Add NoOpRegenerator, a regenerator for custom per-segment caches
  where items are preserved across commits.  (Robert Muir)

* SOLR-4249: UniqFieldsUpdateProcessorFactory now extends 
  FieldMutatingUpdateProcessorFactory and supports all of it's selector options. Use
  of the "fields" init param is now deprecated in favor of "fieldName" (hossman)
  
* SOLR-2548: Allow multiple threads to be specified for faceting. When threading, one
  can specify facet.threads to parallelize loading the uninverted fields. In at least
  one extreme case this reduced warmup time from 20 seconds to 3 seconds. (Janne Majaranta,
  Gun Akkor via Erick Erickson, David Smiley)

* SOLR-4816: CloudSolrServer can now route updates locally and no longer relies on inter-node
  update forwarding.  (Joel Bernstein, Shikhar Bhushan, Stephen Riesenberg, Mark Miller)
  
* SOLR-3249: Allow CloudSolrServer and SolrCmdDistributor to use JavaBin. (Mark Miller)  

Bug Fixes
----------------------

* SOLR-3633: web UI reports an error if CoreAdminHandler says there are no
  SolrCores (steffkes)
  
* SOLR-4489: SpellCheckComponent can throw StringIndexOutOfBoundsException
  when generating collations involving multiple word-break corrections.
  (James Dyer)
  
* SOLR-5087 - CoreAdminHandler.handleMergeAction generating NullPointerException
 (Patrick Hunt via Erick Erickson)

* SOLR-5107: Fixed NPE when using numTerms=0 in LukeRequestHandler
  (Ahmet Arslan, hossman)

* SOLR-4679, SOLR-4908, SOLR-5124: Text extracted from HTML or PDF files
  using Solr Cell was missing ignorable whitespace, which is inserted by
  TIKA for convenience to support plain text extraction without using the
  HTML elements. This bug resulted in glued words.  (hossman, Uwe Schindler)

* SOLR-5121: zkcli usage help for makepath doesn't match actual command.
  (Daniel Collins via Mark Miller)
  
* SOLR-5119: Managed schema problems after adding fields via Schema Rest API.
  (Nils Kübler, Steve Rowe)
  
* SOLR-5133: HdfsUpdateLog can fail to close a FileSystem instance if init 
  is called more than once. (Mark Miller)

* SOLR-5135: Harden Collection API deletion of /collections/$collection 
  ZooKeeper node. (Mark Miller)

* SOLR-4764: When using NRT, just init the first reader from IndexWriter.
  (Robert Muir, Mark Miller)
  
* SOLR-5122: Fixed bug in spellcheck.collateMaxCollectDocs.  Eliminates risk 
  of divide by zero, and makes estimated hit counts meaningful in non-optimized
  indexes.  (hossman)
  
* SOLR-3936: Fixed QueryElevationComponent sorting when used with Grouping
  (Michael Garski via hossman)

* SOLR-5171: SOLR Admin gui works in IE9, breaks in IE10. (Joseph L Howard via
  steffkes)

* SOLR-5174: Admin UI - Query View doesn't highlight (json) Result if it 
  contains HTML Tags (steffkes)
  
* SOLR-4817 Solr should not fall back to the back compat built in solr.xml in SolrCloud 
  mode (Erick Erickson)

* SOLR-5112: Show full message in Admin UI Logging View (Matthew Keeney via
  steffkes)

* SOLR-5190: SolrEntityProcessor substitutes variables only once in child entities
  (Harsh Chawla, shalin)

* SOLR-3852: Fixed ZookeeperInfoServlet so that the SolrCloud Admin UI pages will 
  work even if ZK contains nodes with data which are not utf8 text. (hossman)

* SOLR-5206: Fixed OpenExchangeRatesOrgProvider to use refreshInterval correctly
  (Catalin, hossman)

* SOLR-5215: Fix possibility of deadlock in ZooKeeper ConnectionManager.
  (Mark Miller, Ricardo Merizalde)

* SOLR-4909: Use DirectoryReader.openIfChanged in non-NRT mode.
  (Michael Garski via Robert Muir)

* SOLR-5227: Correctly fail schema initalization if a dynamicField is configured to
  be required, or have a default value.  (hossman)

* SOLR-5231: Fixed a bug with the behavior of BoolField that caused documents w/o
  a value for the field to act as if the value were true in functions if no other
  documents in the same index segment had a value of true.
  (Robert Muir, hossman, yonik)

* SOLR-5233: The "deleteshard" collections API doesn't wait for cluster state to update,
  can fail if some nodes of the deleted shard were down and had incorrect logging.
  (Christine Poerschke, shalin)

* SOLR-5150: HdfsIndexInput may not fully read requested bytes. (Mark Miller, Patrick Hunt)

* SOLR-5240: All solr cores will now be loaded in parallel (as opposed to a fixed number)
  in zookeeper mode to avoid deadlocks due to replicas waiting for other replicas
  to come up. (yonik)

* SOLR-5243: Killing a shard in one collection can result in leader election in a different 
  collection if they share the same coreNodeName. (yonik, Mark Miller)

* SOLR-5281: IndexSchema log message was printing '[null]' instead of
  '[<core name>]' (Jun Ohtani via Steve Rowe)
  
* SOLR-5279: Implicit properties don't seem to exist on core RELOAD
  (elyograg, hossman, Steve Rowe) 

* SOLR-5291: Solrj does not propagate the root cause to the user for many errors.
  (Mark Miller)

Optimizations
----------------------

* SOLR-5044: Admin UI - Note on Core-Admin about directories while creating 
  core (steffkes)

* SOLR-5134: Have HdfsIndexOutput extend BufferedIndexOutput. 
  (Mark Miller, Uwe Schindler)

 * SOLR-5057: QueryResultCache should not related with the order of fq's list (Feihong Huang via Erick Erickson)

* SOLR-4816: CloudSolrServer now uses multiple threads to send updates by default.  
  (Joel Bernstein via Mark Miller)

* SOLR-3530: Better error messages / Content-Type validation in SolrJ. (Mark Miller, hossman)

Other Changes
----------------------

* SOLR-4708: Enable ClusteringComponent by default in collection1 example.
  The solr.clustering.enabled system property is set to 'true' by default.
  (ehatcher, Dawid Weiss)

* SOLR-4914, SOLR-5162: Factor out core list persistence and discovery into a
  new CoresLocator interface. (Alan Woodward, Shawn Heisey)

* SOLR-5056: Improve type safety of ConfigSolr class. (Alan Woodward)

* SOLR-4951: Better randomization of MergePolicy in Solr tests (hossman)

* SOLR-4953, SOLR-5108: Make XML Configuration parsing fail if an xpath matches 
  multiple nodes when only a single value or plugin instance is expected.  
  (hossman)

* The routing parameter "shard.keys" is deprecated as part of SOLR-5017 .The new parameter name is '_route_' .
  The old parameter should continue to work for another release  (Noble Paul)

* SOLR-5173: Solr-core's Maven configuration includes test-only Hadoop
  dependencies as indirect compile-time dependencies.
  (Chris Collins, Steve Rowe)

==================  4.4.0 ==================

Versions of Major Components
---------------------
Apache Tika 1.4
Carrot2 3.6.2
Velocity 1.7 and Velocity Tools 2.0
Apache UIMA 2.3.1
Apache ZooKeeper 3.4.5

Upgrading from Solr 4.3.0
----------------------

* TieredMergePolicy and the various subtypes of LogMergePolicy no longer have 
  an explicit "setUseCompoundFile" method.  Instead the behavior of new 
  segments is determined by the IndexWriter configuration, and the MergePolicy 
  is only consulted to determine if merge segements should use the compound 
  file format (based on the value of "setNoCFSRatio").  If you have explicitly 
  configured one of these classes using <mergePolicy> and include an init arg 
  like this...
     <bool name="useCompoundFile">true</bool>
  ...this will now be treated as if you specified...
     <useCompoundFile>true</useCompoundFile> 
  ...directly on the <indexConfig> (overriding any value already set using that
  syntax) and a warning will be logged to updated your configuration.  Users 
  with an explicitly declared <mergePolicy> are encouraged to review the 
  current javadocs for their MergePolicy subclass and review their configured 
  options carefully.  See SOLR-4941, SOLR-4934 and LUCENE-5038 for more 
  information.

* SOLR-4778: The signature of LogWatcher.registerListener has changed, from
  (ListenerConfig, CoreContainer) to (ListenerConfig).  Users implementing their
  own LogWatcher classes will need to change their code accordingly.

* LUCENE-5063: ByteField and ShortField have been deprecated and will be removed
  in 5.0. If you are still using these field types, you should migrate your
  fields to TrieIntField.

  
Detailed Change List
----------------------

New Features
----------------------

* SOLR-3251: Dynamically add fields to schema. (Steve Rowe, Robert Muir, yonik)   

* SOLR-4761, SOLR-4976: Add option to plugin a merged segment warmer into solrconfig.xml. 
  Info about segments warmed in the background is available via infostream.
  (Mark Miller, Ryan Ernst, Mike McCandless, Robert Muir)

* SOLR-3240: Add "spellcheck.collateMaxCollectDocs" option so that when testing
  potential Collations against the index, SpellCheckComponent will only collect
  n documents, thereby estimating the hit-count.  This is a performance optimization
  in cases where exact hit-counts are unnecessary.  Also, when "collateExtendedResults"
  is false, this optimization is always made (James Dyer).

* SOLR-4785: New MaxScoreQParserPlugin returning max() instead of sum() of terms (janhoy)

* SOLR-4234: Add support for binary files in ZooKeeper. (Eric Pugh via Mark Miller)

* SOLR-4048: Add findRecursive method to NamedList. (Shawn Heisey)

* SOLR-4228: SolrJ's SolrPing object has new methods for ping, enable, and
  disable. (Shawn Heisey, hossman, Steve Rowe)
  
* SOLR-4893: Extend FieldMutatingUpdateProcessor.ConfigurableFieldNameSelector
  to enable checking whether a field matches any schema field.  To select field
  names that don't match any fields or dynamic fields in the schema, add
  <bool name="fieldNameMatchesSchemaField">false</bool> to an update
  processor's configuration in solrconfig.xml.  (Steve Rowe, hossman)

* SOLR-4921: Admin UI now supports adding documents to Solr (gsingers, steffkes)

* SOLR-4916: Add support to write and read Solr index files and transaction log
  files to and from HDFS. (phunt, Mark Miller, Greg Chanan)
  
* SOLR-4892: Add FieldMutatingUpdateProcessorFactory subclasses 
  Parse{Date,Integer,Long,Float,Double,Boolean}UpdateProcessorFactory. These
  factories have a default selector that matches all fields that either dont
  match any schema field, or are in the schema with the corresponding
  typeClass. If they see a value that is not a CharSequence, or can't parse
  the value, they leave it as is. For multi-valued fields, these processors
  will not convert any values unless all are first successfully parsed, or 
  already are instances of the target class. Ordering the processors, e.g.
  [Boolean, Long, Double, Date] will allow e.g. values ["2", "5", "8.6"] to
  be left alone by the Boolean and Long processors, but then converted by the
  Double processor.  (Steve Rowe, hossman)

* SOLR-4972: Add PUT command to ZkCli tool. (Roman Shaposhnik via Mark Miller)

* SOLR-4973: Adding getter method for defaultCollection on CloudSolrServer.
  (Furkan KAMACI via Mark Miller)
  
* SOLR-4897: Add solr/example/example-schemaless/, an example config set
  for schemaless mode. (Steve Rowe)

* SOLR-4655: Add option to have Overseer assign generic node names so that
  new addresses can host shards without naming confusion. (Mark Miller, Anshum Gupta)

* SOLR-4977: Add option to send IndexWriter's infostream to the logging system.
  (Ryan Ernst via Robert Muir)

* SOLR-4693: A "deleteshard" collections API that unloads all replicas of a given
  shard and then removes it from the cluster state. It will remove only those shards
  which are INACTIVE or have no range (created for custom sharding).
  (Anshum Gupta, shalin)

* SOLR-5003: CSV Update Handler supports optionally adding the line number/row id to 
  a document (gsingers)

* SOLR-5010: Add support for creating copy fields to the Schema REST API (gsingers)

* SOLR-4991: Register QParserPlugins as SolrInfoMBeans (ehatcher)

* SOLR-4943: Add a new system wide info admin handler that exposes the system info
  that could previously only be retrieved using a SolrCore. (Mark Miller)

* SOLR-3076: Block joins.  Documents and their sub-documents must be indexed
  as a block.
  {!parent which=<allParents>}<someChildren>  takes in a query that matches child
     documents and results in matches on their parents.
  {!child of=<allParents>}<someParents>  takes in a query that matches some parent
     documents and results in matches on their children.
  (Mikhail Khludnev, Vadim Kirilchuk, Alan Woodward, Tom Burton-West, Mike McCandless,
  hossman, yonik)


Bug Fixes
----------------------

* SOLR-4333: edismax parser to not double-escape colons if already escaped by
  the client application (James Dyer, Robert J. van der Boon)

* SOLR-4776: Solrj doesn't return "between" count in range facets
  (Philip K. Warren via shalin)

* SOLR-4616: HitRatio on caches is now exposed over JMX MBeans as a float.
  (Greg Bowyer)
  
* SOLR-4803: Fixed core discovery mode (ie: new style solr.xml) to treat 
  'collection1' as the default core name. (hossman)
  
* SOLR-4790: Throw an error if a core has the same name as another core, both old and
  new style solr.xml

* SOLR-4842: Fix facet.field local params from affecting other facet.field's.
  (ehatcher, hossman)

* SOLR-4814: If a SolrCore cannot be created it should remove any information it 
  published about itself from ZooKeeper. (Mark Miller)

* SOLR-4863: Removed non-existent attribute sourceId from dynamic JMX stats
  to fix AttributeNotFoundException (suganuma, hossman via shalin)

* SOLR-4891: JsonLoader should preserve field value types from the JSON content stream.
  (Steve Rowe)
 
* SOLR-4805: SolreCore#reload should not call preRegister and publish a DOWN state to
  ZooKeeper. (Mark Miller, Jared Rodriguez)

* SOLR-4899: When reconnecting after ZooKeeper expiration, we need to be willing to wait 
  forever, not just for 30 seconds. (Mark Miller)

* SOLR-4920: JdbcDataSource incorrectly suppresses exceptions when retrieving a connection from
  a JNDI context and falls back to trying to use DriverManager to obtain a connection. Additionally,
  if a SQLException is thrown while initializing a connection, such as in setAutoCommit(), the
  connection will not be closed. (Chris Eldredge via shalin)

* SOLR-4915: The root cause should be returned to the user when a SolrCore create call fails.
  (Mark Miller)

* SOLR-4925 : Collection create throws NPE when 'numShards' param is missing (Noble Paul)

* SOLR-4910: persisting solr.xml is broken. More stringent testing of persistence fixed
  up a number of issues and several bugs with persistence. Among them are
  > don't persisting implicit properties
  > should persist zkHost in the <solr> tag (user's list)
  > reloading a core that has transient="true" returned an error. reload should load
    a transient core if it's not yet loaded.
  > No longer persisting loadOnStartup or transient core properties if they were not
    specified in the original solr.xml
  > Testing flushed out the fact that you couldn't swap a core marked transient=true
    loadOnStartup=false because it hadn't been loaded yet.
  > SOLR-4862, CREATE fails to persist schema, config, and dataDir
  > SOLR-4363, not persisting coreLoadThreads in <solr> tag
  > SOLR-3900, logWatcher properties not persisted
  > SOLR-4850, cores defined as loadOnStartup=true, transient=false can't be searched
  (Erick Erickson)

* SOLR-4923: Commits to non leaders as part of a request that also contain updates
  can execute out of order. (hossman, Ricardo Merizalde, Mark Miller)

* SOLR-4932: persisting solr.xml saves some parameters it shouldn't when they weren't
  defined in the original. Benign since the default values are saved, but still incorrect.
  (Erick Erickson, thanks Shawn Heisey for helping test!)

* SOLR-4934, SOLR-4941: Fix handling of <mergePolicy> init arg 
  "useCompoundFile" needed after changes in LUCENE-5038 (hossman)

* SOLR-4456: Admin UI: Displays dashboard even if Solr is down (steffkes)

* SOLR-4949: UI Analysis page dropping characters from input box (steffkes)

* SOLR-4960: Fix race conditions in shutdown of CoreContainer
  and getCore that could cause a request to attempt to use a core that
  has shut down. (yonik)

* SOLR-4926: Fixed rare replication bug that normally only manifested when 
  using compound file format. (yonik, Mark Miller)
  
* SOLR-4974: Outgrowth of SOLR-4960 that includes transient cores and pending cores
  (Erick Erickson)

* SOLR-3369: shards.tolerant=true is broken for group queries
  (Russell Black, Martijn van Groningen, Jabouille jean Charles, Ryan McKinley via shalin)

* SOLR-4452: Hunspell stemmer should not merge duplicate dictionary entries (janhoy)

* SOLR-5000: ManagedIndexSchema doesn't persist uniqueKey tag after calling addFields
  method. (Jun Ohtani, Steve Rowe)
  
* SOLR-4982: Creating a core while referencing system properties looks like it loses files
  Actually, instanceDir, config, dataDir and schema are not dereferenced properly
  when creating cores that reference sys vars (e.g. &dataDir=${dir}). In the dataDir
  case in particular this leads to the index being put in a directory literally named
  ${dir} but on restart the sysvar will be properly dereferenced.

* SOLR-4788: Multiple Entities DIH delta import: dataimporter.[entityName].last_index_time
  is empty. (chakming wong, James Dyer via shalin)

* SOLR-4978: Time is stripped from datetime column when imported into Solr date field
  if convertType=true. (Bill Au, shalin)

* SOLR-5019: spurious ConcurrentModificationException when spell check component
  was in use with filters. (yonik)
  
* SOLR-5018: The Overseer should avoid publishing the state for collections that do not 
  exist under the /collections zk node. (Mark Miller)

* SOLR-5028,SOLR-5029: ShardHandlerFactory was not being created properly when
  using new-style solr.xml, and was not being persisted properly when using
  old-style.  (Tomás Fernández Löbbe, Ryan Ernst, Alan Woodward)

* SOLR-4997: The splitshard api doesn't call commit on new sub shards before
  switching shard states. Multiple bugs related to sub shard recovery and
  replication are also fixed. (shalin)

* SOLR-5034: A facet.query that parses or analyzes down to a null Query would
  throw a NPE. Fixed. (David Smiley)
  
* SOLR-5039: Admin/Schema Browser displays -1 for term counts for multiValued fields.

* SOLR-5037: The CSV loader now accepts field names that are not in the schema.
  (gsingers, ehatcher, Steve Rowe)

* SOLR-4791: solr.xml sharedLib does not work in 4.3.0 (Ryan Ernst, Jan Høydahl via 
  Erick Erickson)

Optimizations
----------------------

* SOLR-4923: Commit to all nodes in a collection in parallel rather than locally and
  then to all other nodes. (hossman, Ricardo Merizalde, Mark Miller)

* SOLR-3838: Admin UI - Multiple filter queries are not supported in Query UI (steffkes)

* SOLR-4719 : Admin UI - Default to wt=json on Query-Screen (steffkes)

* SOLR-4611: Admin UI - Analysis-Urls with empty parameters create empty result table
  (steffkes)

* SOLR-4955: Admin UI - Show address bar on top for Schema + Config (steffkes)

* SOLR-4412: New parameter langid.lcmap to map detected language code to be placed 
  in "language" field (janhoy)

* SOLR-4815: Admin-UI - DIH: Let "commit" be checked by default (steffkes)

* SOLR-5002: optimize numDocs(Query,DocSet) when filterCache is null (Robert Muir)

* SOLR-5012: optimize search with filter when filterCache is null (Robert Muir)

Other Changes
----------------------

* SOLR-4737: Update Guava to 14.0.1 (Mark Miller)

* SOLR-2079: Add option to pass HttpServletRequest in the SolrQueryRequest context map.
  (Tomás Fernández Löbbe via Robert Muir)

* SOLR-4738: Update Jetty to 8.1.10.v20130312 (Mark Miller, Robert Muir)

* SOLR-4749: Clean up and refactor CoreContainer code around solr.xml and SolrCore
  management. (Mark Miller)

* SOLR-4547: Move logging of filenames on commit from INFO to DEBUG.
  (Shawn Heisey, hossman)

* SOLR-4757: Change the example to use the new solr.xml format and core 
  discovery by directory structure. (Mark Miller)

* SOLR-4759: Velocity (/browse) template cosmetic cleanup.
  (Mark Bennett, ehatcher)

* SOLR-4778: LogWatcher init code moved out of CoreContainer (Alan Woodward)

* SOLR-4784: Make class LuceneQParser public (janhoy)

* SOLR-4448: Allow the solr internal load balancer to be more easily pluggable.
  (Philip Hoy via Robert Muir)
  
* SOLR-4224: Refactor JavaBinCodec input stream definition to enhance reuse.
  (phunt via Mark Miller)

* SOLR-4931: SolrDeletionPolicy onInit and onCommit methods changed to override
  exact signatures (with generics) from IndexDeletionPolicy (shalin)

* SOLR-4942: test improvements to randomize use of compound files (hosman)

* SOLR-4966: CSS, JS and other files in webapp without license (uschindler,
  steffkes)

* SOLR-4986: Upgrade to Tika 1.4 (Markus Jelsma via janhoy)

* SOLR-4948, SOLR-5009: Tidied up CoreContainer construction logic.
  (Alan Woodward, Uwe Schindler, Steve Rowe)

* LUCENE-5107: Properties files by Solr are now written in UTF-8 encoding,
  Unicode is no longer escaped. Reading of legacy properties files with
  \u escapes is still possible.  (Uwe Schindler, Robert Muir)

==================  4.3.1 ==================

Versions of Major Components
---------------------
Apache Tika 1.3
Carrot2 3.6.2
Velocity 1.7 and Velocity Tools 2.0
Apache UIMA 2.3.1
Apache ZooKeeper 3.4.5

Detailed Change List
----------------------

Bug Fixes
----------------------

* SOLR-4795: Sub shard leader should not accept any updates from parent after
  it goes active (shalin)

* SOLR-4798: shard splitting does not respect the router for the collection
  when executing the index split.   One effect of this is that documents
  may be placed in the wrong shard when the default compositeId router
  is used in conjunction with IDs containing "!". (yonik)

* SOLR-4797: Shard splitting creates sub shards which have the wrong hash
  range in cluster state. This happens when numShards is not a power of two
  and router is compositeId. (shalin)

* SOLR-4806: Shard splitting does not abort if WaitForState times out (shalin)

* SOLR-4807: The zkcli script now works with log4j. The zkcli.bat script
  was broken on Windows in 4.3.0, now it works. (Shawn Heisey)

* SOLR-4813: Fix SynonymFilterFactory to allow init parameters for
  tokenizer factory used when parsing synonyms file.  (Shingo Sasaki, hossman)

* SOLR-4829: Fix transaction log leaks (a failure to clean up some old logs)
  on a shard leader, or when unexpected exceptions are thrown during log
  recovery.  (Steven Bower, Mark Miller, yonik)

* SOLR-4751: Fix replication problem of files in sub directory of conf directory.
  (Minoru Osuka via Koji)

* SOLR-4741: Deleting a collection should set DELETE_DATA_DIR to true.
  (Mark Miller)

* SOLR-4752: There are some minor bugs in the Collections API parameter
  validation. (Mark Miller)

* SOLR-4563: RSS DIH-example not working (janhoy)

* SOLR-4796: zkcli.sh should honor JAVA_HOME (Roman Shaposhnik via Mark Miller)

* SOLR-4734: Leader election fails with an NPE if there is no UpdateLog.
 (Mark Miller, Alexander Eibner)

* SOLR-4868: Setting the log level for the log4j root category results in
  adding a new category, the empty string. (Shawn Heisey)

* SOLR-4855: DistributedUpdateProcessor doesn't check for peer sync requests (shalin)

* SOLR-4867: Admin UI - setting loglevel on root throws RangeError (steffkes)

* SOLR-4870: RecentUpdates.update() does not increment numUpdates loop counter
  (Alexey Kudinov via shalin)

* SOLR-4877, LUCENE-5023: Removed SolrIndexSearcher#getDocSetNC()'s special
  case for handling TermQuery to prevent NullPointerException if reader does
  not have fields.  (Bao Yang Yang, Uwe Schindler)

* SOLR-4881: Fix DocumentAnalysisRequestHandler to correctly use
  EmptyEntityResolver to prevent loading of external entities like
  UpdateRequestHandler does.  (Hossman, Uwe Schindler)

* SOLR-4858: SolrCore reloading was broken when the UpdateLog
  was enabled.  (Hossman, Anshum Gupta, Alexey Serba, Mark Miller, yonik)

* SOLR-4853: Fixed SolrJettyTestBase so it may be reused by end users
  (hossman)

* SOLR-4744: Update failure on sub shard is not propagated to clients by parent
  shard (Anshum Gupta, yonik, shalin)
  
Other Changes
----------------------

* SOLR-4760: Include core name in logs when loading schema.
  (Shawn Heisey)

==================  4.3.0 ==================

Versions of Major Components
---------------------
Apache Tika 1.3
Carrot2 3.6.2
Velocity 1.7 and Velocity Tools 2.0
Apache UIMA 2.3.1
Apache ZooKeeper 3.4.5

Upgrading from Solr 4.2.0
----------------------

* In the schema REST API, the output path for copyFields and dynamicFields 
  has been changed from all lowercase "copyfields" and "dynamicfields" to 
  camelCase "copyFields" and "dynamicFields", respectively, to align with all 
  other schema REST API outputs, which use camelCase.  The URL format remains 
  the same: all resource names are lowercase.  See SOLR-4623 for details.
  
* Slf4j/logging jars are no longer included in the Solr webapp. All logging 
  jars are now in example/lib/ext. Changing logging impls is now as easy as 
  updating the jars in this folder with those necessary for the logging impl 
  you would like. If you are using another webapp container, these jars will 
  need to go in the corresponding location for that container. 
  In conjunction, the dist-excl-slf4j and dist-war-excl-slf4 build targets 
  have been removed since they are redundent.  See the Slf4j documentation, 
  SOLR-3706, and SOLR-4651 for more details.

* The hardcoded SolrCloud defaults for 'hostContext="solr"' and 
  'hostPort="8983"' have been deprecated and will be removed in Solr 5.0.  
  Existing solr.xml files that do not have these options explicitly specified 
  should be updated accordingly.  See SOLR-4622 for more details.


Detailed Change List
----------------------

New Features
----------------------

* SOLR-4648 PreAnalyzedUpdateProcessorFactory allows using the functionality
  of PreAnalyzedField with other field types. See javadoc for details and
  examples. (Andrzej Bialecki)
  
* SOLR-4623: Provide REST API read access to all elements of the live schema.
  Add a REST API request to return the entire live schema, in JSON, XML, and
  schema.xml formats.  Move REST API methods from package org.apache.solr.rest
  to org.apache.solr.rest.schema, and rename base functionality REST API
  classes to remove the current schema focus, to prepare for other non-schema
  REST APIs.  Change output path for copyFields and dynamicFields from
  "copyfields" and "dynamicfields" (all lowercase) to "copyFields" and
  "dynamicFields", respectively, to align with all other REST API outputs, which
  use camelCase.
  (Steve Rowe)
    
* SOLR-4658: In preparation for REST API requests that can modify the schema,
  a "managed schema" is introduced.  
  Add '<schemaFactory class="ManagedSchemaFactory" mutable="true"/>' to solrconfig.xml
  in order to use it, and to enable schema modifications via REST API requests.
  (Steve Rowe, Robert Muir)

* SOLR-4656: Added two new highlight parameters, hl.maxMultiValuedToMatch and 
  hl.maxMultiValuedToExamine. maxMultiValuedToMatch stops looking for snippets after 
  finding the specified number of matches, no matter how far into the multivalued field
  you've gone. maxMultiValuedToExamine stops looking for matches after the specified
  number of multiValued entries have been examined. If both are specified, the limit
  hit first stops the loop. Also this patch cuts down on the copying of the document 
  entries during highlighting. These optimizations are probably unnoticeable unless
  there are a large number of entries in the multiValued field. Conspicuously, this will
  prevent the "best" match from being found if it appears later in the MV list than the
  cutoff specified by either of these params. (Erick Erickson)

* SOLR-4675: Improve PostingsSolrHighlighter to support per-field/query-time overrides
  and add additional configuration parameters. See the javadocs for more details and
  examples. (Robert Muir)

* SOLR-3755: A new collections api to add additional shards dynamically by splitting
  existing shards. (yonik, Anshum Gupta, shalin)

* SOLR-4530: DIH: Provide configuration to use Tika's IdentityHtmlMapper
  (Alexandre Rafalovitch via shalin)
  
* SOLR-4662: Discover SolrCores by directory structure rather than defining them
  in solr.xml. Also, change the format of solr.xml to be closer to that of solrconfig.xml.
  This version of Solr will ship the example in the old style, but you can manually
  try the new style. Solr 4.4 will ship with the new style, and Solr 5.0 will remove
  support for the old style. (Erick Erickson, Mark Miller)
  Additional Work:
  - SOLR-4347: Ensure that newly-created cores via Admin handler are persisted in solr.xml
  (Erick Erickson)
  - SOLR-1905: Cores created by the admin request handler should be persisted to solr.xml.
  Also fixed a problem whereby properties like solr.solr.datadir would be persisted
  to solr.xml. Also, cores that didn't happen to be loaded were not persisted. 
  (Erick Erickson)

* SOLR-4717/SOLR-1351: SimpleFacets now work with localParams allowing faceting on the 
  same field multiple ways (ryan, Uri Boness)

* SOLR-4671: CSVResponseWriter now supports pseudo fields. (ryan, nihed mbarek)

* SOLR-4358: HttpSolrServer sends the stream name and exposes 'useMultiPartPost'
  (Karl Wright via ryan)
   

Bug Fixes
----------------------

* SOLR-4543: setting shardHandlerFactory in solr.xml/solr.properties does not work.
  (Ryan Ernst, Robert Muir via Erick Erickson)

* SOLR-4634: Fix scripting engine tests to work with Java 8's "Nashorn" Javascript
  implementation.  (Uwe Schindler)

* SOLR-4636: If opening a reader fails for some reason when opening a SolrIndexSearcher,
  a Directory can be left unreleased. (Mark Miller)

* SOLR-4405: Admin UI - admin-extra files are not rendered into the core-menu (steffkes)

* SOLR-3956: Fixed group.facet=true to work with negative facet.limit
  (Chris van der Merwe, hossman)
  
* SOLR-4650: copyField doesn't work with source globs that don't match any
  explicit or dynamic fields.  This regression was introduced in Solr 4.2.
  (Daniel Collins, Steve Rowe)
  
* SOLR-4641: Schema now throws exception on illegal field parameters.  (Robert Muir)

* SOLR-3758: Fixed SpellCheckComponent to work consistently with distributed grouping
  (James Dyer)

* SOLR-4652: Fix broken behavior with shared libraries in resource loader for
  solr.xml plugins.  (Ryan Ernst, Robert Muir, Uwe Schindler)

* SOLR-4664: ZkStateReader should update aliases on construction. 
  (Mark Miller, Elodie Sannier)

* SOLR-4682: CoreAdminRequest.mergeIndexes can not merge multiple cores or indexDirs.
  (Jason.D.Cao via shalin)

* SOLR-4581: When faceting on numeric fields in Solr 4.2, negative values (constraints)
  were sorted incorrectly. (Alexander Buhr, shalin, yonik)

* SOLR-4699: The System admin handler should not assume a file system based data directory 
  location. (Mark Miller)

* SOLR-4695: Fix core admin SPLIT action to be useful with non-cloud setups (shalin)

* SOLR-4680: Correct example spellcheck configuration's queryAnalyzerFieldType and
  use "text" field instead of narrower "name" field (ehatcher, Mark Bennett)

* SOLR-4702: Fix example /browse "Did you mean?" suggestion feature. (ehatcher, Mark Bennett)

* SOLR-4710: You cannot delete a collection fully from ZooKeeper unless all nodes are up and 
  functioning correctly. (Mark Miller)

* SOLR-4487: SolrExceptions thrown by HttpSolrServer will now contain the 
  proper HTTP status code returned by the remote server, even if that status 
  code is not something Solr itself returned -- eg: from the Servlet Container, 
  or an intermediate HTTP Proxy (hossman)

* SOLR-4661: Admin UI Replication details now correctly displays the current
  replicable generation/version of the master. (hossman)

* SOLR-4716,SOLR-4584: SolrCloud request proxying does not work on Tomcat and
  perhaps other non Jetty containers. (Po Rui, Yago Riveiro via Mark Miller)

* SOLR-4746: Distributed grouping used a NamedList instead of a SimpleOrderedMap
  for the top level group commands, causing output formatting differences
  compared to non-distributed grouping. (yonik)

* SOLR-4705: Fixed bug causing NPE when querying a single replica in SolrCloud 
  using the shards param (Raintung Li, hossman)

* SOLR-4729: LukeRequestHandler: Using a dynamic copyField source that is
  not also a dynamic field triggers error message 'undefined field: "(glob)"'.
  (Adam Hahn, hossman, Steve Rowe)

Optimizations
----------------------

Other Changes
----------------------

* SOLR-4653: Solr configuration should log inaccessible/ non-existent relative paths in lib 
  dir=... (Dawid Weiss)

* SOLR-4317: SolrTestCaseJ4: Can't avoid "collection1" convention (Tricia Jenkins, via Erick Erickson)

* SOLR-4571: SolrZkClient#setData should return Stat object. (Mark Miller)

* SOLR-4603: CachingDirectoryFactory should use an IdentityHashMap for 
  byDirectoryCache. (Mark Miller)

* SOLR-4544: Refactor HttpShardHandlerFactory so load-balancing logic can be customized.
  (Ryan Ernst via Robert Muir)

* SOLR-4607: Use noggit 0.5 release jar rather than a forked copy.  (Yonik Seeley, Robert Muir)
  
* SOLR-3706: Ship setup to log with log4j. (ryan, Mark Miller)

* SOLR-4651: Remove dist-excl-slf4j build target. (Shawn Heisey)

* SOLR-4622: The hardcoded SolrCloud defaults for 'hostContext="solr"' and 
  'hostPort="8983"' have been deprecated and will be removed in Solr 5.0.  
  Existing solr.xml files that do not have these options explicitly specified 
  should be updated accordingly.  (hossman)

* SOLR-4672: Requests attempting to use SolrCores which had init failures 
  (that would be reported by CoreAdmin STATUS requests) now result in 500 
  error responses with the details about the init failure, instead of 404 
  error responses.  (hossman)

* SOLR-4730: Make the wiki link more prominent in the release documentation.
  (Uri Laserson via Robert Muir)
  

==================  4.2.1 ==================

Versions of Major Components
---------------------
Apache Tika 1.3
Carrot2 3.6.2
Velocity 1.7 and Velocity Tools 2.0
Apache UIMA 2.3.1
Apache ZooKeeper 3.4.5

Detailed Change List
----------------------

Bug Fixes
----------------------

* SOLR-4567: copyField source glob matching explicit field(s) stopped working
  in Solr 4.2. (Alexandre Rafalovitch, Steve Rowe)
  
* SOLR-4475: Fix various places that still assume File based paths even when 
  not using a file based DirectoryFactory. (Mark Miller)

* SOLR-4551: CachingDirectoryFactory needs to create CacheEntry's with the 
  fullpath not path. (Mark Miller)

* SOLR-4555: When forceNew is used with CachingDirectoryFactory#get, the old
  CachValue should give up it's path as it will be used by a new Directory
  instance. (Mark Miller)

* SOLR-4578: CoreAdminHandler#handleCreateAction gets a SolrCore and does not
  close it in SolrCloud mode when a core with the same name already exists.
  (Mark Miller)

* SOLR-4574: The Collections API will silently return success on an unknown
  ACTION parameter. (Mark Miller)

* SOLR-4576: Collections API validation errors should cause an exception on
  clients and otherwise act as validation errors with the Core Admin API.
  (Mark Miller)

* SOLR-4577: The collections API should return responses (success or failure)
  for each node it attempts to work with. (Mark Miller)
  
* SOLR-4568: The lastPublished state check before becoming a leader is not 
  working correctly. (Mark Miller)

* SOLR-4570: Even if an explicit shard id is used, ZkController#preRegister 
  should still wait to see the shard id in it's current ClusterState.
  (Mark Miller)

* SOLR-4585: The Collections API validates numShards with < 0 but should use 
  <= 0. (Mark Miller)

* SOLR-4592: DefaultSolrCoreState#doRecovery needs to check the CoreContainer
  shutdown flag inside the recoveryLock sync block. (Mark Miller)

* SOLR-4595: CachingDirectoryFactory#close can throw a concurrent 
  modification exception. (Mark Miller)

* SOLR-4573: Accessing Admin UI files in SolrCloud mode logs warnings.
  (Mark Miller, Phil John)

* SOLR-4594: StandardDirectoryFactory#remove accesses byDirectoryCache 
  without a lock. (Mark Miller)

* SOLR-4597: CachingDirectoryFactory#remove should not attempt to empty/remove 
  the index right away but flag for removal after close. (Mark Miller)

* SOLR-4598: The Core Admin unload command's option 'deleteDataDir', should use 
  the DirectoryFactory API to remove the data dir. (Mark Miller)

* SOLR-4599: CachingDirectoryFactory calls close(Directory) on forceNew if the 
  Directory has a refCnt of 0, but it should call closeDirectory(CacheValue).
  (Mark Miller)

* SOLR-4602: ZkController#unregister should cancel it's election participation 
  before asking the Overseer to delete the SolrCore information. (Mark Miller)

* SOLR-4601: A Collection that is only partially created and then deleted will 
  leave pre allocated shard information in ZooKeeper. (Mark Miller)
  
* SOLR-4604: UpdateLog#init is over called on SolrCore#reload. (Mark Miller)

* SOLR-4605: Rollback does not work correctly. (Mark S, Mark Miller)

* SOLR-4609: The Collections API should only send the reload command to ACTIVE 
  cores. (Mark Miller)     
           
* SOLR-4297: Atomic update request containing null=true sets all subsequent
  fields to null (Ben Pennell, Rob, shalin)
  
* SOLR-4371: Admin UI - Analysis Screen shows empty result (steffkes)

* SOLR-4318: NPE encountered with querying with wildcards on a field that uses
  the DefaultAnalyzer (i.e. no analysis chain defined). (Erick Erickson)

* SOLR-4361: DataImportHandler would throw UnsupportedOperationException if
  handler-level parameters were specified containing periods in the name
  (James Dyer)

* SOLR-4538: Date Math expressions were being truncated to 32 characters
  when used in field:value queries in the lucene QParser.  (hossman, yonik)

* SOLR-4617: SolrCore#reload needs to pass the deletion policy to the next 
  SolrCore through it's constructor rather than setting a field after.
  (Mark Miller)
    
* SOLR-4589: Fixed CPU spikes and poor performance in lazy field loading 
  of multivalued fields. (hossman)

* SOLR-4608: Update Log replay and PeerSync replay should use the default
  processor chain to update the index. (Ludovic Boutros, yonik)

* SOLR-4625: The solr (lucene syntax) query parser lost top-level boost
  values and top-level phrase slops on queries produced by nested
  sub-parsers. (yonik)

* SOLR-4624: CachingDirectoryFactory does not need to support forceNew any 
  longer and it appears to be causing a missing close directory bug. forceNew
  is no longer respected and will be removed in 4.3. (Mark Miller)

* SOLR-3819: Grouped faceting (group.facet=true) did not respect filter
  exclusions. (Petter Remen, yonik)

* SOLR-4637: Replication can sometimes wait until shutdown or core unload until
  removing some tmp directories. (Mark Miller)
  
* SOLR-4638: DefaultSolrCoreState#getIndexWriter(null) is a way to avoid
  creating the IndexWriter earlier than necessary, but it's not 
  implemented quite right. (Mark Miller)

* SOLR-4640: CachingDirectoryFactory can fail to close directories in some race
  conditions. (Mark Miller)

* SOLR-4642: QueryResultKey is not calculating the correct hashCode for filters.
  (Joel Bernstein via Mark Miller)

Optimizations
----------------------

* SOLR-4569: waitForReplicasToComeUp should bail right away if it doesn't see the
  expected slice in the clusterstate rather than waiting. (Mark Miller)

* SOLR-4311: Admin UI - Optimize Caching Behaviour (steffkes)
      
Other Changes
----------------------

* SOLR-4537: Clean up schema information REST API. (Steve Rowe)

* SOLR-4596: DistributedQueue should ensure its full path exists in the constructor.
  (Mark Miller)
  
==================  4.2.0 ==================

Versions of Major Components
---------------------
Apache Tika 1.3
Carrot2 3.6.2
Velocity 1.7 and Velocity Tools 2.0
Apache UIMA 2.3.1
Apache ZooKeeper 3.4.5

Upgrading from Solr 4.1.0
----------------------

(No upgrade instructions yet)

Detailed Change List
----------------------

New Features
----------------------

* SOLR-4043: Add ability to get success/failure responses from Collections API.
  (Raintung Li, Mark Miller)

* SOLR-2827: RegexpBoost Update Processor (janhoy)

* SOLR-4370: Allow configuring commitWithin to do hard commits. 
  (Mark Miller, Senthuran Sivananthan)

* SOLR-4451: SolrJ, and SolrCloud internals, now use SystemDefaultHttpClient 
  under the covers -- allowing many HTTP connection related properties to be
  controlled via 'standard' java system properties.  (hossman)

* SOLR-3855, SOLR-4490: Doc values support. (Adrien Grand, Robert Muir)

* SOLR-4417: Reopen the IndexWriter on SolrCore reload. (Mark Miller)

* SOLR-4477: Add support for queries (match-only) against docvalues fields. 
  (Robert Muir)

* SOLR-4488: Return slave replication details for a master if the master has
  also acted like a slave. (Mark Miller)

* SOLR-4498: Add list command to ZkCLI that prints out the contents of 
  ZooKeeper. (Roman Shaposhnik via Mark Miller)

* SOLR-4481: SwitchQParserPlugin registered by default as 'switch' using  
  syntax: {!switch case=XXX case.foo=YYY case.bar=ZZZ default=QQQ}foo
  (hossman)
  
* SOLR-4078: Allow custom naming of SolrCloud nodes so that a new host:port 
  combination can take over for a previous shard. (Mark Miller)

* SOLR-4210: Requests to a Collection that does not exist on the receiving node
  should be proxied to a suitable node. (Mark Miller, Po Rui, yonik)

* SOLR-1365: New SweetSpotSimilarityFactory allows customizable TF/IDF based
  Similarity when you know the optimal "Sweet Spot" of values for the field 
  length and TF scoring factors.  (hossman)

* SOLR-4138: CurrencyField fields can now be used in a ValueSources to
  get the "raw" value (using the default number of fractional digits) in 
  the default currency of the field type.  There is also a new 
  currency(field,[CODE]) function for generating a ValueSource of the 
  "natural" value, converted to an optionally specified currency to 
  override the default for the field type.
  (hossman)
  
* SOLR-4503: Add REST API methods, via Restlet integration, for reading schema
  elements, at /schema/fields/, /schema/dynamicfields/, /schema/fieldtypes/,
  and /schema/copyfields/.  (Steve Rowe)

Bug Fixes
----------------------

* SOLR-2850: Do not refine facets when minCount == 1
  (Matt Smith, lundgren via Adrien Grand)

* SOLR-4309: /browse: Improve JQuery autosuggest behavior (janhoy)

* SOLR-4330: group.sort is ignored when using group.truncate and ex/tag
  local params together (koji)
  
* SOLR-4321: Collections API will sometimes use a node more than once, even
  when more unused nodes are available. 
  (Eric Falcao, Brett Hoerner, Mark Miller)

* SOLR-4345 : Solr Admin UI dosent work in IE 10 (steffkes)

* SOLR-4349 : Admin UI - Query Interface does not work in IE
  (steffkes)

* SOLR-4359: The RecentUpdates#update method should treat a problem reading the
  next record the same as a problem parsing the record - log the exception and
  break. (Mark Miller)

* SOLR-4225: Term info page under schema browser shows incorrect count of terms
  (steffkes)
  
* SOLR-3926: Solr should support better way of finding active sorts (Eirik Lygre via
  Erick Erickson)

* SOLR-4342: Fix DataImportHandler stats to be a proper Map (hossman)

* SOLR-3967: langid.enforceSchema option checks source field instead of target field (janhoy)

* SOLR-4380: Replicate after startup option would not replicate until the
  IndexWriter was lazily opened. (Mark Miller, Gregg Donovan)

* SOLR-4400: Deadlock can occur in a rare race between committing and
  closing a SolrIndexWriter. (Erick Erickson, Mark Miller)
  
* SOLR-3655: A restarted node can briefly appear live and active before it really
  is in some cases. (Mark Miller)

* SOLR-4426: NRTCachingDirectoryFactory does not initialize maxCachedMB and maxMergeSizeMB
  if <directoryFactory> is not present in solrconfig.xml (Jack Krupansky via shalin)

* SOLR-4463: Fix SolrCoreState reference counting. (Mark Miller)

* SOLR-4459: The Replication 'index move' rather than copy optimization doesn't
  kick in when using NRTCachingDirectory or the rate limiting feature.
  (Mark Miller)

* SOLR-4421,SOLR-4165: On CoreContainer shutdown, all SolrCores should publish their 
  state as DOWN. (Mark Miller, Markus Jelsma)

* SOLR-4467: Ephemeral directory implementations may not recover correctly 
  because the code to clear the tlog files on startup is off. (Mark Miller)

* SOLR-4413: Fix SolrCore#getIndexDir() to return the current index directory.
  (Gregg Donovan, Mark Miller)
  
* SOLR-4469: A new IndexWriter must be opened on SolrCore reload when the index
  directory has changed and the previous SolrCore's state should not be 
  propagated. (Mark Miller, Gregg Donovan)

* SOLR-4471: Replication occurs even when a slave is already up to date.
  (Mark Miller, Andre Charton)
  
* SOLR-4484: ReplicationHandler#loadReplicationProperties still uses Files 
  rather than the Directory to try and read the replication properties files.
  (Mark Miller) 
  
* SOLR-4352: /browse pagination now supports and preserves sort context
  (Eric Spiegelberg, Erik Hatcher)

* LUCENE-4796, SOLR-4373: Fix concurrency issue in NamedSPILoader and
  AnalysisSPILoader when doing concurrent core loads in multicore
  Solr configs.  (Uwe Schindler, Hossman)

* SOLR-4504: Fixed CurrencyField range queries to correctly exclude 
  documents w/o values (hossman)

* SOLR-4480: A trailing + or - caused the edismax parser to throw
  an exception.  (Fiona Tay, Jan Høydahl, yonik)

* SOLR-4507: The Cloud tab does not show up in the Admin UI if you
  set zkHost in solr.xml. (Alfonso Presa, Mark Miller)

* SOLR-4505: Possible deadlock around SolrCoreState update lock.
  (Erick Erickson, Mark Miller)
  
* SOLR-4511: When a new index is replicated into place, we need
  to update the most recent replicatable index point without 
  doing a commit. This is important for repeater use cases, as
  well as when nodes may switch master/slave roles.
  (Mark Miller, Raúl Grande)

* SOLR-4515: CurrencyField's OpenExchangeRatesOrgProvider now requires
  a ratesFileLocation init param, since the previous global default
  no longer works (hossman)

* SOLR-4518: Improved CurrencyField error messages when attempting to
  use a Currency that is not supported by the current JVM. (hossman)
  
* SOLR-3798: Fix copyField implementation in IndexSchema to handle
  dynamic field references that aren't string-equal to the name of
  the referenced dynamic field. (Steve Rowe)

* SOLR-4497: Collection Aliasing. (Mark Miller)

Optimizations
----------------------

* SOLR-4339: Admin UI - Display Field-Flags on Schema-Browser
  (steffkes)

* SOLR-4340: Admin UI - Analysis's Button Spinner goes wild
  (steffkes)

* SOLR-4341: Admin UI - Plugins/Stats Page contains loooong
  Values which result in horizontal Scrollbar (steffkes)

* SOLR-3915: Color Legend for Cloud UI (steffkes)

* SOLR-4306: Utilize indexInfo=false when gathering core names in UI
  (steffkes)

* SOLR-4284: Admin UI - make core list scrollable separate from the rest of
  the UI (steffkes)

* SOLR-4364: Admin UI - Locale based number formatting (steffkes)

* SOLR-4521: Stop using the 'force' option for recovery replication. This
  will keep some less common unnecessary replications from happening.
  (Mark Miller, Simon Scofield)

* SOLR-4529: Improve Admin UI Dashboard legibility (Felix Buenemann via 
  steffkes)

* SOLR-4526: Admin UI depends on optional system info (Felix Buenemann via
  steffkes)

Other Changes
----------------------

* SOLR-4259: Carrot2 dependency should be declared on the mini version, not the core.
  (Dawid Weiss).

* SOLR-4348: Make the lock type configurable by system property by default.
  (Mark Miller)

* SOLR-4353: Renamed example jetty context file to reduce confusion (hossman)

* SOLR-4384: Make post.jar report timing information (Upayavira via janhoy)

* SOLR-4415: Add 'state' to shards (default to 'active') and read/write them to
  ZooKeeper (Anshum Gupta via shalin)

* SOLR-4394: Tests and example configs demonstrating SSL with both server 
  and client certs (hossman)

* SOLR-3060: SurroundQParserPlugin highlighting tests 
  (Ahmet Arslan via hossman)

* SOLR-2470: Added more tests for VelocityResponseWriter

* SOLR-4471: Improve and clean up TestReplicationHandler. 
  (Amit Nithian via Mark Miller)

* SOLR-3843: Include lucene codecs jar and enable per-field postings and docvalues
  support in the schema.xml (Robert Muir, Steve Rowe)

* SOLR-4511: Add new test for 'repeater' replication node. (Mark Miller)

* SOLR-4458: Sort directions (asc, desc) are now case insensitive
  (Shawn Heisey via hossman)

* SOLR-2996: A bare * without a field specification is treated as *:*
  by the lucene and edismax query paesers.
  (hossman, Jan Høydahl, Alan Woodward, yonik)

* SOLR-4416: Upgrade to Tika 1.3. (Markus Jelsma via Mark Miller)

* SOLR-4200: Reduce INFO level logging from CachingDirectoryFactory
  (Shawn Heisey via hossman)

==================  4.1.0 ==================

Versions of Major Components
---------------------
Apache Tika 1.2
Carrot2 3.6.2
Velocity 1.7 and Velocity Tools 2.0
Apache UIMA 2.3.1
Apache ZooKeeper 3.4.5

Upgrading from Solr 4.0.0
----------------------

Custom java parsing plugins need to migrate from throwing the internal
ParseException to throwing SyntaxError.

BaseDistributedSearchTestCase now randomizes the servlet context it uses when 
creating Jetty instances.  Subclasses that assume a hard coded context of 
"/solr" should either be fixed to use the "String context" variable, or should 
take advantage of the new BaseDistributedSearchTestCase(String) constructor
to explicitly specify a fixed servlet context path.  See SOLR-4136 for details.


Detailed Change List
----------------------

New Features
----------------------

* SOLR-2255: Enhanced pivot faceting to use local-params in the same way that
  regular field value faceting can. This means support for excluding a filter
  query, using a different output key, and specifying 'threads' to do
  facet.method=fcs concurrently. PivotFacetHelper now extends SimpleFacet and
  the getFacetImplementation() extension hook was removed. (dsmiley)

* SOLR-3897: A highlighter parameter "hl.preserveMulti" to return all of the
  values of a multiValued field in their original order when highlighting.
  (Joel Bernstein via yonik)

* SOLR-3929: Support configuring IndexWriter max thread count in solrconfig.
  (phunt via Mark Miller)

* SOLR-3906: Add support for AnalyzingSuggester (LUCENE-3842), where the
  underlying analyzed form used for suggestions is separate from the returned
  text.  (Robert Muir)

* SOLR-3985: ExternalFileField caches can be reloaded on firstSearcher/
  newSearcher events using the ExternalFileFieldReloader (Alan Woodward)

* SOLR-3911: Make Directory and DirectoryFactory first class so that the majority 
  of Solr's features work with any custom implementations. (Mark Miller)
  Additional Work:
  - SOLR-4032: Files larger than an internal buffer size fail to replicate.
    (Mark Miller, Markus Jelsma)
  - SOLR-4033: Consistently use the solrconfig.xml lockType everywhere.
    (Mark Miller, Markus Jelsma)
  - SOLR-4144: Replication using too much RAM. (yonik, Markus Jelsma)
  - SOLR-4187: NPE on Directory release (Mark Miller, Markus Jelsma)
    
* SOLR-4051: Add <propertyWriter /> element to DIH's data-config.xml file,  
  allowing the user to specify the location, filename and Locale for
  the "data-config.properties" file.  Alternatively, users can specify their
  own property writer implementation for greater control. This new configuration 
  element is optional, and defaults mimic prior behavior.  The one exception is 
  that the "root" locale is default. Previously it was the machine's default locale.  
  (James Dyer)

* SOLR-4084: Add FuzzyLookupFactory, which is like AnalyzingSuggester except that 
  it can tolerate typos in the input.  (Areek Zillur via Robert Muir)

* SOLR-4088: New and improved auto host detection strategy for SolrCloud.
  (Raintung Li via Mark Miller)

* SOLR-3970: SystemInfoHandler now exposes more details about the 
  JRE/VM/Java version in use.  (hossman)

* SOLR-4101: Add support for storing term offsets in the index via a
  'storeOffsetsWithPositions' flag on field definitions in the schema.
  (Tom Winch, Alan Woodward)

* SOLR-4093: Solr QParsers may now be directly invoked in the lucene
  query syntax without the _query_ magic field hack.
  Example:  foo AND {!term f=myfield v=$qq}
  (yonik)

* SOLR-4087: Add MAX_DOC_FREQ option to MoreLikeThis.
  (Andrew Janowczyk via Mark Miller)

* SOLR-4114: Allow creating more than one shard per instance with the
  Collection API. (Per Steffensen, Mark Miller)

* SOLR-3531: Allowing configuring maxMergeSizeMB and maxCachedMB when
  using NRTCachingDirectoryFactory. (Andy Laird via Mark Miller) 

* SOLR-4118: Fix replicationFactor to align with industry usage.
  replicationFactor now means the total number of copies
  of a document stored in the collection (or the total number of
  physical indexes for a single logical slice of the collection).
  For example if replicationFactor=3 then for a given shard there
  will be a total of 3 replicas (one of which will normally be
  designated as the leader.) (yonik)

* SOLR-4124: You should be able to set the update log directory with the
  CoreAdmin API the same way as the data directory. (Mark Miller)
  
* SOLR-4028: When using ZK chroot, it would be nice if Solr would create the 
  initial path when it doesn't exist. (Tomás Fernández Löbbe via Mark Miller)

* SOLR-3948: Calculate/display deleted documents in admin interface.
  (Shawn Heisey via Mark Miller)
  
* SOLR-4030: Allow rate limiting Directory IO based on the IO context.
  (Mark Miller, Radim Kolar)

* SOLR-4166: LBHttpSolrServer ignores ResponseParser passed in constructor.
  (Steve Molloy via Mark Miller)

* SOLR-4140: Allow access to the collections API through CloudSolrServer
  without referencing an existing collection. (Per Steffensen via Mark Miller)

* SOLR-788: Distributed search support for MLT.
  (Matthew Woytowitz, Mike Anderson, Jamie Johnson, Mark Miller)

* SOLR-4120: Collection API: Support for specifying a list of Solr addresses to
  spread a new collection across. (Per Steffensen via Mark Miller)

* SOLR-4110: Configurable Content-Type headers for PHPResponseWriters and 
  PHPSerializedResponseWriter. (Dominik Siebel via Mark Miller)
  
* SOLR-1028: The ability to specify "transient" and "loadOnStartup" as a new properties of
  <core> tags in solr.xml. Can specify "transientCacheSize" in the <cores> tag. Together
  these allow cores to be loaded only when needed and only transientCacheSize transient
  cores will be loaded at a time, the rest aged out on an LRU basis.

* SOLR-4246: When update.distrib is set to skip update processors before
  the distributed update processor, always include the log update processor
  so forwarded updates will still be logged. (yonik)

* SOLR-4230: The new Solr 4 spatial fields now work with the {!geofilt} and
  {!bbox} query parsers. The score local-param works too. (David Smiley)

* SOLR-1972: Add extra statistics to RequestHandlers - 5 & 15-minute reqs/sec
  rolling averages; median, 75th, 95th, 99th, 99.9th percentile request times
  (Alan Woodward, Shawn Heisey, Adrien Grand, Uwe Schindler)

* SOLR-4271: Add support for PostingsHighlighter.  (Robert Muir)

* SOLR-4255: The new Solr 4 spatial fields now have a 'filter' boolean local-param
  that can be set to false to not filter. Its useful when there is already a spatial
  filter query but you also need to sort or boost by distance. (David Smiley)

* SOLR-4265, SOLR-4283: Solr now parses request parameters (in URL or sent with POST
  using content-type application/x-www-form-urlencoded) in its dispatcher code. It no
  longer relies on special configuration settings in Tomcat or other web containers
  to enable UTF-8 encoding, which is mandatory for correct Solr behaviour. Query
  strings passed in via the URL need to be properly-%-escaped, UTF-8 encoded
  bytes, otherwise Solr refuses to handle the request. The maximum length of
  x-www-form-urlencoded POST parameters can now be configured through the
  requestDispatcher/requestParsers/@formdataUploadLimitInKB setting in
  solrconfig.xml (defaults to 2 MiB). Solr now works out of the box with
  e.g. Tomcat, JBoss,...  (Uwe Schindler, Dawid Weiss, Alex Rocher)

* SOLR-2201: DIH's "formatDate" function now supports a timezone as an optional
  fourth parameter (James Dyer, Mark Waddle)

* SOLR-4302: New parameter 'indexInfo' (defaults to true) in CoreAdmin STATUS
  command can be used to omit index specific information (Shahar Davidson via shalin)

* SOLR-2592: Collection specific document routing.  The "compositeId"
  router is the default for collections with hash based routing (i.e. when
  numShards=N is specified on collection creation).  Documents with ids sharing
  the same domain (prefix) will be routed to the same shard, allowing for
  efficient querying.

  Example:
    The following two documents will be indexed to the same shard
    since they share the same domain "customerB!". 
    <code>
       {"id" : "customerB!doc1" [...] }
       {"id" : "customerB!doc2" [...] }
    </code>
    At query time, one can specify a "shard.keys" parameter that lists what
    shards the query should cover.
       http://.../query?q=my_query&shard.keys=customerB!

  Collections that do not specify numShards at collection creation time
  use custom sharding and default to the "implicit" router.  Document updates
  received by a shard will be indexed to that shard, unless a "_shard_" parameter
  or document field names a different shard.
  (Michael Garski, Dan Rosher, yonik)


Optimizations
----------------------

* SOLR-3788: Admin Cores UI should redirect to newly created core details
  (steffkes)

* SOLR-3895: XML and XSLT UpdateRequestHandler should not try to resolve
  external entities. This improves speed of loading e.g. XSL-transformed
  XHTML documents.  (Martin Herfurt, uschindler, hossman)

* SOLR-3614: Fix XML parsing in XPathEntityProcessor to correctly expand
  named entities, but ignore external entities.  (uschindler, hossman)

* SOLR-3734: Improve Schema-Browser Handling for CopyField using
  dynamicField's (steffkes)
  
* SOLR-3941: The "commitOnLeader" part of distributed recovery can use
  openSearcher=false. (Tomás Fernández Löbbe via Mark Miller)
  
* SOLR-4063: Allow CoreContainer to load multiple SolrCores in parallel rather
  than just serially. (Mark Miller)
  
* SOLR-4199: When doing zk retries due to connection loss, rather than just
  retrying for 2 minutes, retry in proportion to the session timeout.
  (Mark Miller)

* SOLR-4262: Replication Icon on Dashboard does not reflect Master-/Slave-
  State (steffkes)

* SOLR-4264: Missing Error-Screen on UI's Cloud-Page (steffkes)

* SOLR-4261: Percentage Infos on Dashboard have a fixed width (steffkes)

* SOLR-3851: create a new core/delete an existing core should also update 
  the main/left list of cores on the admin UI (steffkes)

* SOLR-3840: XML query response display is unreadable in Solr Admin Query UI
  (steffkes)

* SOLR-3982: Admin UI: Various Dataimport Improvements (steffkes)

* SOLR-4296: Admin UI: Improve Dataimport Auto-Refresh (steffkes)

* SOLR-3458: Allow multiple Items to stay open on Plugins-Page (steffkes)

Bug Fixes
----------------------

* SOLR-4288: Improve logging for FileDataSource (basePath, relative 
  resources). (Dawid Weiss)

* SOLR-4007: Morfologik dictionaries not available in Solr field type
  due to class loader lookup problems. (Lance Norskog, Dawid Weiss)

* SOLR-3560: Handle different types of Exception Messages for Logging UI
  (steffkes)

* SOLR-3637: Commit Status at Core-Admin UI is always false (steffkes)

* SOLR-3917: Partial State on Schema-Browser UI is not defined for Dynamic
  Fields & Types (steffkes)
  
* SOLR-3939: Consider a sync attempt from leader to replica that fails due 
  to 404 a success. (Mark Miller, Joel Bernstein)
  
* SOLR-3940: Rejoining the leader election incorrectly triggers the code path
  for a fresh cluster start rather than fail over. (Mark Miller)

* SOLR-3961: Fixed error using LimitTokenCountFilterFactory 
  (Jack Krupansky, hossman)

* SOLR-3933: Distributed commits are not guaranteed to be ordered within a 
  request. (Mark Miller)

* SOLR-3939: An empty or just replicated index cannot become the leader of a
  shard after a leader goes down. (Joel Bernstein, yonik, Mark Miller)
  
* SOLR-3971: A collection that is created with numShards=1 turns into a 
  numShards=2 collection after starting up a second core and not specifying 
  numShards. (Mark Miller)

* SOLR-3988: Fixed SolrTestCaseJ4.adoc(SolrInputDocument) to respect 
  field and document boosts (hossman)

* SOLR-3981: Fixed bug that resulted in document boosts being compounded in
  <copyField/> destination fields. (hossman)

* SOLR-3920: Fix server list caching in CloudSolrServer when using more than one
  collection list with the same instance. (Grzegorz Sobczyk, Mark Miller)

* SOLR-3938: prepareCommit command omits commitData causing a failure to trigger
  replication to slaves. (yonik)

* SOLR-3992: QuerySenderListener doesn't populate document cache.
  (Shotaro Kamio, yonik)

* SOLR-3995: Recovery may never finish on SolrCore shutdown if the last reference to 
  a SolrCore is closed by the recovery process. (Mark Miller)

* SOLR-3998: Atomic update on uniqueKey field itself causes duplicate document.
  (Eric Spencer, yonik)

* SOLR-4001: In CachingDirectoryFactory#close, if there are still refs for a
  Directory outstanding, we need to wait for them to be released before closing.
  (Mark Miller)

* SOLR-4005: If CoreContainer fails to register a created core, it should close it.
  (Mark Miller)

* SOLR-4009: OverseerCollectionProcessor is not resilient to many error conditions
  and can stop running on errors. (Raintung Li, milesli, Mark Miller)

* SOLR-4019: Log stack traces for 503/Service Unavailable SolrException if not
  thrown by PingRequestHandler. Do not log exceptions if a user tries to view a
  hidden file using ShowFileRequestHandler.  (Tomás Fernández Löbbe via James Dyer)

* SOLR-3589: Edismax parser does not honor mm parameter if analyzer splits a token.
  (Tom Burton-West, Robert Muir)

* SOLR-4031: Upgrade to Jetty 8.1.7 to fix a bug where in very rare occasions 
  the content of two concurrent requests get mixed up. (Per Steffensen, yonik)

* SOLR-4060: ReplicationHandler can try and do a snappull and open a new IndexWriter
  after shutdown has already occurred, leaving an IndexWriter that is not closed.
  (Mark Miller)

* SOLR-4055: Fix a thread safety issue with the Collections API that could
  cause actions to be targeted at the wrong SolrCores. 
  (Raintung Li, Per Steffensen via Mark Miller)

* SOLR-3993: If multiple SolrCore's for a shard coexist on a node, on cluster
  restart, leader election would stall until timeout, waiting to see all of 
  the replicas come up. (Mark Miller, Alexey Kudinov)
  
* SOLR-2045: Databases that require a commit to be issued before closing the 
  connection on a non-read-only database leak connections.  Also expanded the
  SqlEntityProcessor test to sometimes use Derby as well as HSQLDB (Derby is
  one db affected by this bug).  (Fenlor Sebastia, James Dyer)

* SOLR-4064: When there is an unexpected exception while trying to run the new
  leader process, the SolrCore will not correctly rejoin the election.
  (Po Rui via Mark Miller)

* SOLR-3989: SolrZkClient constructor dropped exception cause when throwing
  a new RuntimeException. (Colin Bartolome, yonik)

* SOLR-4036: field aliases in fl should not cause properties of target field
  to be used. (Martin Koch, yonik)

* SOLR-4003: The SolrZKClient clean method should not try and clear zk paths
  that start with /zookeeper, as this can fail and stop the removal of
  further nodes. (Mark Miller)

* SOLR-4076: SolrQueryParser should run fuzzy terms through
  MultiTermAwareComponents to ensure that (for example) a fuzzy query of
  foobar~2 is equivalent to FooBar~2 on a field that includes lowercasing.
  (yonik)

* SOLR-4081: QueryParsing.toString, used during debugQuery=true, did not
  correctly handle ExtendedQueries such as WrappedQuery
  (used when cache=false), spatial queries, and frange queries.
  (Eirik Lygre, yonik)

* SOLR-3959: Ensure the internal comma separator of poly fields is escaped
  for CSVResponseWriter.  (Areek Zillur via Robert Muir)
  
* SOLR-4075: A logical shard that has had all of it's SolrCores unloaded should 
  be removed from the cluster state. (Mark Miller, Gilles Comeau)
  
* SOLR-4034: Check if a collection already exists before trying to create a
  new one. (Po Rui, Mark Miller)

* SOLR-4097: Race can cause NPE in logging line on first cluster state update.
  (Mark Miller)
  
* SOLR-4099: Allow the collection api work queue to make forward progress even
  when it's watcher is not fired for some reason. (Raintung Li via Mark Miller)

* SOLR-3960: Fixed a bug where Distributed Grouping ignored PostFilters
  (Nathan Visagan, hossman)

* SOLR-3842: DIH would not populate multivalued fields if the column name
  derives from a resolved variable (James Dyer)

* SOLR-4117: Retrieving the size of the index may use the wrong index dir if
  you are replicating.
  (Mark Miller, Markus Jelsma)

* SOLR-2890: Fixed a bug that prevented omitNorms and omitTermFreqAndPositions 
  options from being respected in some <fieldType/> declarations (hossman)

* SOLR-4159: When we are starting a shard from rest, a potential leader should 
  not consider it's last published state when deciding if it can be the new 
  leader. (Mark Miller)

* SOLR-4158: When a core is registering in ZooKeeper it may not wait long 
  enough to find the leader due to how long the potential leader waits to see 
  replicas. (Mark Miller, Alain Rogister)

* SOLR-4162: ZkCli usage examples are not correct because the zkhost parameter 
  is not present and it is mandatory for all commands. 
  (Tomás Fernández Löbbe via Mark Miller)

* SOLR-4071: Validate that name is pass to Collections API create, and behave the
  same way as on startup when collection.configName is not explicitly passed.
  (Po Rui, Mark Miller)

* SOLR-4127: Added explicit error message if users attempt Atomic document 
  updates with either updateLog or DistribUpdateProcessor. (hossman)

* SOLR-4136: Fix SolrCloud behavior when using "hostContext" containing "_" 
  or"/" characters.  This fix also makes SolrCloud more accepting of 
  hostContext values with leading/trailing slashes. (hossman)

* SOLR-4168: Ensure we are using the absolute latest index dir when getting
  list of files for replication. (Mark Miller)

* SOLR-4171: CachingDirectoryFactory should not return any directories after it
  has been closed. (Mark Miller)

* SOLR-4102: Fix UI javascript error if canonical hostname can not be resolved
  (steffkes via hossman)

* SOLR-4178: ReplicationHandler should abort any current pulls and wait for 
  it's executor to stop during core close. (Mark Miller)

* SOLR-3918: Fixed the 'dist-war-excl-slf4j' ant target to exclude all
  slf4j jars, so that the resulting war is usable as is provided the servlet 
  container includes the correct slf4j api and impl jars.
  (Shawn Heisey, hossman)

* SOLR-4198: OverseerCollectionProcessor should implement ClosableThread.
  (Mark Miller)

* SOLR-4213: Directories that are not shutdown until DirectoryFactory#close 
  do not have close listeners called on them. (Mark Miller)

* SOLR-4134: Standard (XML) request writer cannot "set" multiple values into
  multivalued field with partial updates. (Luis Cappa Banda, Will Butler, shalin)

* SOLR-3972: Fix ShowFileRequestHandler to not log a warning in the 
  (expected) situation of a file not found.  (hossman)

* SOLR-4133: Cannot "set" field to null with partial updates when using the
  standard RequestWriter. (Will Butler, shalin)

* SOLR-4223: "maxFormContentSize" in jetty.xml is not picked up by jetty 8
  so set it via solr webapp context file. (shalin)
  
* SOLR-4175:SearchComponent chain can't contain two components of the
  same class and use debugQuery. (Tomás Fernández Löbbe via ehatcher)

* SOLR-4244: When coming back from session expiration we should not wait for
  the leader to see us in the down state if we are the node that must become
  the leader. (Mark Miller)

* SOLR-4245: When a core is registering with ZooKeeper, the timeout to find the
  leader in the cluster state is 30 seconds rather than leaderVoteWait + extra 
  time. (Mark Miller)

* SOLR-4238: Fix jetty example requestLog config (jm via hossman)

* SOLR-4251: Fix SynonymFilterFactory when an optional tokenizerFactory is supplied.
  (Chris Bleakley via rmuir)

* SOLR-4253: Misleading resource loading warning from Carrot2 clustering 
  component fixed (Stanisław Osiński)

* SOLR-4257: PeerSync updates and Log Replay updates should not wait for
  a ZooKeeper connection in order to proceed. (yonik)

* SOLR-4045: SOLR admin page returns HTTP 404 on core names containing
  a '.' (dot) (steffkes)

* SOLR-4176: analysis ui: javascript not properly handling URL decoding
  of input (steffkes)

* SOLR-4079: Long core names break web gui appearance and functionality
  (steffkes) 

* SOLR-4263: Incorrect Link from Schema-Browser to Query From for Top-Terms
  (steffkes)

* SOLR-3829: Admin UI Logging events broken if schema.xml defines a catch-all
  dynamicField with type ignored (steffkes)

* SOLR-4275: Fix TrieTokenizer to no longer throw StringIndexOutOfBoundsException
  in admin UI / AnalysisRequestHandler when you enter no number to tokenize.
  (Uwe Schindler)

* SOLR-4279: Wrong exception message if _version_ field is multivalued (shalin)

* SOLR-4170: The 'backup' ReplicationHandler command can sometimes use a stale
  index directory rather than the current one. (Mark Miller, Marcin Rzewucki)

* SOLR-3876: Solr Admin UI is completely dysfunctional on IE 9 (steffkes)

* SOLR-4112: Fixed DataImportHandler ZKAwarePropertiesWriter implementation so
  import works fine with SolrCloud clusters (Deniz Durmus, James Dyer,
  Erick Erickson, shalin)

* SOLR-4291: Harden the Overseer work queue thread loop. (Mark Miller)

* SOLR-3820: Solr Admin Query form is missing some edismax request parameters
  (steffkes)

* SOLR-4217: post.jar no longer ignores -Dparams when -Durl is used.
  (Alexandre Rafalovitch, ehatcher)

* SOLR-4303: On replication, if the generation of the master is lower than the
  slave we need to force a full copy of the index. (Mark Miller, Gregg Donovan)
  
* SOLR-4266: HttpSolrServer does not release connection properly on exception
  when no response parser is used. (Steve Molloy via Mark Miller)

* SOLR-2298: Updated JavaDoc for SolrDocument.addField and SolrInputDocument.addField
  to have more information on name and value parameters. (Siva Natarajan)

Other Changes
----------------------

* SOLR-4106: Javac/ ivy path warnings with morfologik fixed by
  upgrading to Morfologik 1.5.5 (Robert Muir, Dawid Weiss)

* SOLR-3899: SolrCore should not log at warning level when the index directory
  changes - it's an info event. (Tobias Bergman, Mark Miller)

* SOLR-3861: Refactor SolrCoreState so that it's managed by SolrCore.
  (Mark Miller, hossman)

* SOLR-3966: Eliminate superfluous warning from LanguageIdentifierUpdateProcessor
  (Markus Jelsma via hossman)

* SOLR-3932: SolrCmdDistributorTest either takes 3 seconds or 3 minutes.
  (yonik, Mark Miller)  
  
* SOLR-3856: New tests for SqlEntityProcessor/CachedSqlEntityProcessor 
  (James Dyer)

* SOLR-4067: ZkStateReader#getLeaderProps should not return props for a leader
  that it does not think is live. (Mark Miller)
  
* SOLR-4086: DIH refactor of VariableResolver and Evaluator.  VariableResolver
  and each built-in Evaluator are separate concrete classes.  DateFormatEvaluator
  now defaults with the ROOT Locale. However, users may specify a different 
  Locale using an optional new third parameter. (James Dyer)

* SOLR-3602: Update ZooKeeper to 3.4.5 (Mark Miller)

* SOLR-4095: DIH NumberFormatTransformer & DateFormatTransformer default to the
  ROOT Locale if none is specified.  These previously used the machine's default.
  (James Dyer)
  
* SOLR-4096: DIH FileDataSource & FieldReaderDataSource default to UTF-8 encoding
  if none is specified.  These previously used the machine's default.
  (James Dyer)
  
* SOLR-1916: DIH to not use Lucene-forbidden Java APIs 
  (default encoding, locale, etc.) (James Dyer, Robert Muir)

* SOLR-4111: SpellCheckCollatorTest#testContextSensitiveCollate to test against
  both DirectSolrSpellChecker & IndexBasedSpellChecker
  (Tomás Fernández Löbbe via James Dyer)

* SOLR-2141: Better test coverage for Evaluators (James Dyer)

* SOLR-4119: Update Guava to 13.0.1 (Mark Miller)

* SOLR-4074: Raise default ramBufferSizeMB to 100 from 32.
  (yonik, Mark Miller)

* SOLR-4062: The update log location in solrconfig.xml should default to 
  ${solr.ulog.dir} rather than ${solr.data.dir:} (Mark Miller)

* SOLR-4155: Upgrade Jetty to 8.1.8. (Robert Muir)

* SOLR-2986: Add MoreLikeThis to warning about features that require uniqueKey.
  Also, change the warning to warn log level. (Shawn Heisey via Mark Miller)

* SOLR-4163: README improvements (Shawn Heisey via hossman)

* SOLR-4248: "ant eclipse" should declare .svn directories as derived.
  (Shawn Heisey via Mark Miller)

* SOLR-3279: Upgrade Carrot2 to 3.6.2 (Stanisław Osiński)

* SOLR-4254: Harden the 'leader requests replica to recover' code path.
  (Mark Miller, yonik)

* SOLR-4226: Extract fl parsing code out of ReturnFields constructor.
  (Ryan Ernst via Robert Muir)

* SOLR-4208: ExtendedDismaxQParserPlugin has been refactored to make 
  subclassing easier. (Tomás Fernández Löbbe, hossman)
  
* SOLR-3735: Relocate the example mime-to-extension mapping, and
  upgrade Velocity Engine to 1.7 (ehatcher)

* SOLR-4287: Removed "apache-" prefix from Solr distribution and artifact
  filenames. (Ryan Ernst, Robert Muir, Steve Rowe)

* SOLR-4016: Deduplication does not work with atomic/partial updates so
  disallow atomic update requests which change signature generating fields.
  (Joel Nothman, yonik, shalin)

* SOLR-4308: Remove the problematic and now unnecessary log4j-over-slf4j.
  (Mark Miller)

==================  4.0.0 ==================

Versions of Major Components
---------------------
Apache Tika 1.2
Carrot2 3.5.0
Velocity 1.6.4 and Velocity Tools 2.0
Apache UIMA 2.3.1
Apache ZooKeeper 3.3.6

Upgrading from Solr 4.0.0-BETA
----------------------

In order to better support distributed search mode, the TermVectorComponent's
response format has been changed so that if the schema defines a 
uniqueKeyField, then that field value is used as the "key" for each document in
it's response section, instead of the internal lucene doc id.  Users w/o a 
uniqueKeyField will continue to see the same response format.  See SOLR-3229
for more details.

If you are using SolrCloud's distributed update request capabilities and a non
string type id field, you must re-index.

Upgrading from Solr 4.0.0-ALPHA
----------------------

Solr is now much more strict about requiring that the uniqueKeyField feature 
(if used) must refer to a field which is not multiValued.  If you upgrade from 
an earlier version of Solr and see an error that your uniqueKeyField "can not 
be configured to be multivalued" please add 'multiValued="false"' to the 
<field /> declaration for your uniqueKeyField.  See SOLR-3682 for more details.

In addition, please review the notes above about upgrading from 4.0.0-BETA

Upgrading from Solr 3.6
----------------------

* The Lucene index format has changed and as a result, once you upgrade, 
  previous versions of Solr will no longer be able to read your indices.
  In a master/slave configuration, all searchers/slaves should be upgraded
  before the master.  If the master were to be updated first, the older
  searchers would not be able to read the new index format.

* Setting abortOnConfigurationError=false is no longer supported
  (since it has never worked properly).  Solr will now warn you if
  you attempt to set this configuration option at all. (see SOLR-1846)

* The default logic for the 'mm' param of the 'dismax' QParser has
  been changed.  If no 'mm' param is specified (either in the query,
  or as a default in solrconfig.xml) then the effective value of the
  'q.op' param (either in the query or as a default in solrconfig.xml
  or from the 'defaultOperator' option in schema.xml) is used to
  influence the behavior.  If q.op is effectively "AND" then mm=100%.
  If q.op is effectively "OR" then mm=0%.  Users who wish to force the
  legacy behavior should set a default value for the 'mm' param in
  their solrconfig.xml file.
  
* The VelocityResponseWriter is no longer built into the core.  Its JAR and
  dependencies now need to be added (via <lib> or solr/home lib inclusion),
  and it needs to be registered in solrconfig.xml like this:
    <queryResponseWriter name="velocity" class="solr.VelocityResponseWriter"/>

* The update request parameter to choose Update Request Processor Chain is 
  renamed from "update.processor" to "update.chain". The old parameter was
  deprecated but still working since Solr3.2, but is now removed
  entirely.

* The <indexDefaults> and <mainIndex> sections of solrconfig.xml are discontinued
  and replaced with the <indexConfig> section. There are also better defaults.
  When migrating, if you don't know what your old settings mean, simply delete
  both <indexDefaults> and <mainIndex> sections. If you have customizations,
  put them in <indexConfig> section - with same syntax as before.

* Two of the SolrServer subclasses in SolrJ were renamed/replaced.
  CommonsHttpSolrServer is now HttpSolrServer, and 
  StreamingUpdateSolrServer is now ConcurrentUpdateSolrServer.

* The PingRequestHandler no longer looks for a <healthcheck/> option in the 
  (legacy) <admin> section of solrconfig.xml.  Users who wish to take 
  advantage of this feature should configure a "healthcheckFile" init param 
  directly on the  PingRequestHandler.  As part of this change, relative file 
  paths have been fixed to be resolved against the data dir.  See the example 
  solrconfig.xml and SOLR-1258 for more details.

* Due to low level changes to support SolrCloud, the uniqueKey field can no 
  longer be populated via <copyField/> or <field default=...> in the 
  schema.xml.  Users wishing to have Solr automatically generate a uniqueKey 
  value when adding documents should instead use an instance of
  solr.UUIDUpdateProcessorFactory in their update processor chain.  See 
  SOLR-2796 for more details.

In addition, please review the notes above about upgrading from 4.0.0-BETA, and 4.0.0-ALPHA

Detailed Change List
----------------------

New Features
----------------------

* SOLR-3670: New CountFieldValuesUpdateProcessorFactory makes it easy to index 
  the number of values in another field for later use at query time. (hossman)

* SOLR-2768: new "mod(x,y)" function for computing the modulus of two value 
  sources. (hossman)

* SOLR-3238: Numerous small improvements to the Admin UI (steffkes)

* SOLR-3597: seems like a lot of wasted whitespace at the top of the admin screens
  (steffkes)

* SOLR-3304: Added Solr adapters for Lucene 4's new spatial module.  With
  SpatialRecursivePrefixTreeFieldType ("location_rpt" in example schema), it is
  possible to index a variable number of points per document (and sort on them),
  index not just points but any Spatial4j supported shape such as polygons, and
  to query on these shapes too.  Polygons requires adding JTS to the classpath.
  (David Smiley)

* SOLR-3825: Added optional capability to log what ids are in a response
        (Scott Stults via gsingers)

* SOLR-3821: Added 'df' to the UI Query form (steffkes)

* SOLR-3822: Added hover titles to the edismax params on the UI Query form 
  (steffkes)

Optimizations
----------------------

* SOLR-3715: improve concurrency of the transaction log by removing
  synchronization around log record serialization. (yonik)

* SOLR-3807: Currently during recovery we pause for a number of seconds after 
  waiting for the leader to see a recovering state so that any previous updates
  will have finished before our commit on the leader - we don't need this wait 
  for peersync. (Mark Miller)
  
* SOLR-3837: When a leader is elected and asks replicas to sync back to him and 
  that fails, we should ask those nodes to recovery asynchronously rather than 
  synchronously. (Mark Miller)

* SOLR-3709: Cache the url list created from the ClusterState in CloudSolrServer
  on each request. (Mark Miller)


Bug Fixes
----------------------

* SOLR-3685: Solr Cloud sometimes skipped peersync attempt and replicated instead due
  to tlog flags not being cleared when no updates were buffered during a previous
  replication.  (Markus Jelsma, Mark Miller, yonik)

* SOLR-3229: Fixed TermVectorComponent to work with distributed search
  (Hang Xie, hossman)

* SOLR-3725: Fixed package-local-src-tgz target to not bring in unnecessary jars
  and binary contents.  (Michael Dodsworth via rmuir)

* SOLR-3649: Fixed bug in JavabinLoader that caused deleteById(List<String> ids)
  to not work in SolrJ (siren)

* SOLR-3730: Rollback is not implemented quite right and can cause corner case fails in 
  SolrCloud tests. (rmuir, Mark Miller)

* SOLR-2981: Fixed StatsComponent to no longer return duplicated information 
  when requesting multiple stats.facet fields.
  (Roman Kliewer via hossman)

* SOLR-3743: Fixed issues with atomic updates and optimistic concurrency in
  conjunction with stored copyField targets by making real-time get never
  return copyField targets. (yonik)

* SOLR-3746: Proper error reporting if updateLog is configured w/o necessary 
  "_version_" field in schema.xml (hossman)

* SOLR-3745: Proper error reporting if SolrCloud mode is used w/o 
  necessary "_version_" field in schema.xml (hossman)

* SOLR-3770: Overseer may lose updates to cluster state (siren)

* SOLR-3721: Fix bug that could theoretically allow multiple recoveries to run
  briefly at the same time if the recovery thread join call was interrupted.
  (Per Steffensen, Mark Miller)

* SOLR-3782: A leader going down while updates are coming in can cause shard
  inconsistency. (Mark Miller)

* SOLR-3611: We do not show ZooKeeper data in the UI for a node that has children.
  (Mark Miller)

* SOLR-3789: Fix bug in SnapPuller that caused "internal" compression to fail.
  (siren)

* SOLR-3790: ConcurrentModificationException could be thrown when using hl.fl=*.
  Fixed in r1231606. (yonik, koji)

* SOLR-3668: DataImport : Specifying Custom Parameters (steffkes)

* SOLR-3793: UnInvertedField faceting cached big terms in the filter
  cache that ignored deletions, leading to duplicate documents in search
  later when a filter of the same term was specified.
  (Günter Hipler, hossman, yonik)

* SOLR-3679: Core Admin UI gives no feedback if "Add Core" fails (steffkes, hossman)

* SOLR-3795: Fixed LukeRequestHandler response to correctly return field name 
  strings in copyDests and copySources arrays (hossman)

* SOLR-3699: Fixed some Directory leaks when there were errors during SolrCore 
  or SolrIndexWriter initialization. (hossman)

* SOLR-3518: Include final 'hits' in log information when aggregating a 
  distributed request (Markus Jelsma via hossman)

* SOLR-3628: SolrInputField and SolrInputDocument are now consistently backed 
  by Collections passed in to setValue/setField, and defensively copy values 
  from Collections passed to addValue/addField
  (Tom Switzer via hossman)

* SOLR-3595: CurrencyField now generates an appropriate error on schema init
  if it is configured as multiValued - this has never been properly supported, 
  but previously failed silently in odd ways.  (hossman)

* SOLR-3823: Fix 'bq' parsing in edismax.  Please note that this required 
  reverting the negative boost support added by SOLR-3278 (hossman)

* SOLR-3827: Fix shareSchema=true in solr.xml 
  (Tomás Fernández Löbbe via hossman)

* SOLR-3809: Fixed config file replication when subdirectories are used
  (Emmanuel Espina via hossman)

* SOLR-3828: Fixed QueryElevationComponent so that using 'markExcludes' does 
  not modify the result set or ranking of 'excluded' documents relative to 
  not using elevation at all.  (Alexey Serba via hossman)

* SOLR-3569: Fixed debug output on distributed requests when there are no 
  results found.  (David Bowen via hossman)

* SOLR-3811: Query Form using wrong values for dismax, edismax (steffkes)

* SOLR-3779: DataImportHandler's LineEntityProcessor when used in conjunction 
  with FileListEntityProcessor would only process the first file.
  (Ahmet Arslan via James Dyer)
  
* SOLR-3791: CachedSqlEntityProcessor would throw a NullPointerException when 
  a query returns a row with a NULL key.  (Steffen Moelter via James Dyer)

* SOLR-3833: When a election is started because a leader went down, the new 
  leader candidate should decline if the last state they published was not
  active. (yonik, Mark Miller)

* SOLR-3836: When doing peer sync, we should only count sync attempts that 
  cannot reach the given host as success when the candidate leader is 
  syncing with the replicas - not when replicas are syncing to the leader.
  (Mark Miller)

* SOLR-3835: In our leader election algorithm, if on connection loss we found
  we did not create our election node, we should retry, not throw an exception.
  (Mark Miller)

* SOLR-3834: A new leader on cluster startup should also run the leader sync 
  process in case there was a bad cluster shutdown. (Mark Miller)

* SOLR-3772: On cluster startup, we should wait until we see all registered 
  replicas before running the leader process - or if they all do not come up,
  N amount of time. (Mark Miller)
  
* SOLR-3756: If we are elected the leader of a shard, but we fail to publish 
  this for any reason, we should clean up and re trigger a leader election.
  (Mark Miller)

* SOLR-3812: ConnectionLoss during recovery can cause lost updates, leading to 
  shard inconsistency. (Mark Miller)
  
* SOLR-3813: When a new leader syncs, we need to ask all shards to sync back, 
  not just those that are active. (Mark Miller)

* SOLR-3641: CoreContainer is not persisting roles core attribute. 
  (hossman, Mark Miller)

* SOLR-3527: SolrCmdDistributor drops some of the important commit attributes
  (maxOptimizeSegments, softCommit, expungeDeletes) when sending a commit to
  replicas. (Andy Laird, Tomás Fernández Löbbe, Mark Miller)

* SOLR-3844: SolrCore reload can fail because it tries to remove the index 
  write lock while already holding it. (Mark Miller)

* SOLR-3831: Atomic updates do not distribute correctly to other nodes.
  (Jim Musil, Mark Miller)
  
* SOLR-3465: Replication causes two searcher warmups. 
  (Michael Garski, Mark Miller)

* SOLR-3645: /terms should default to distrib=false. (Nick Cotton, Mark Miller)

* SOLR-3759: Various fixes to the example-DIH configs (Ahmet Arslan, hossman)

* SOLR-3777: Dataimport-UI does not send unchecked checkboxes (Glenn MacStravic
  via steffkes)

* SOLR-3850: DataImportHandler "cacheKey" parameter was incorrectly renamed "cachePk"
  (James Dyer)

* SOLR-3087: Fixed DOMUtil so that code doing attribute validation will 
  automatically ignore nodes in the reserved "xml" prefix - in particular this
  fixes some bugs related to xinclude and fieldTypes.
  (Amit Nithian, hossman)

* SOLR-3783: Fixed Pivot Faceting to work with facet.missing=true (hossman)

* SOLR-3869: A PeerSync attempt to it's replicas by a candidate leader should
  not fail on o.a.http.conn.ConnectTimeoutException. (Mark Miller)

* SOLR-3875: Fixed index boosts on multi-valued fields when docBoost is used 
  (hossman)

* SOLR-3878: Exception when using open-ended range query with CurrencyField (janhoy)

* SOLR-3891: CacheValue in CachingDirectoryFactory cannot be used outside of 
  solr.core package. (phunt via Mark Miller)
  
* SOLR-3892: Inconsistent locking when accessing cache in CachingDirectoryFactory
  from RAMDirectoryFactory and MockDirectoryFactory. (phunt via Mark Miller)

* SOLR-3883: Distributed indexing forwards non-applicable request params.
  (Dan Sutton, Per Steffensen, yonik, Mark Miller)

* SOLR-3903: Fixed MissingFormatArgumentException in ConcurrentUpdateSolrServer
  (hossman)

* SOLR-3916: Fixed whitespace bug in parsing the fl param (hossman)

Other Changes
----------------------

* SOLR-3690: Fixed binary release packages to include dependencies needed for
  the solr-test-framework (hossman)

* SOLR-2857: The /update/json and /update/csv URLs were restored to aid
  in the migration of existing clients.  (yonik)

* SOLR-3691: SimplePostTool: Mode for crawling/posting web pages
  See http://wiki.apache.org/solr/ExtractingRequestHandler for examples (janhoy)

* SOLR-3707: Upgrade Solr to Tika 1.2 (janhoy)

* SOLR-2747: Updated changes2html.pl to handle Solr's CHANGES.txt; added
  target 'changes-to-html' to solr/build.xml.
  (Steve Rowe, Robert Muir)
  
* SOLR-3752: When a leader goes down, have the Overseer clear the leader state
  in cluster.json (Mark Miller)

* SOLR-3751: Add defensive checks for SolrCloud updates and requests that ensure 
  the local state matches what we can tell the request expected. (Mark Miller)
  
* SOLR-3773: Hash based on the external String id rather than the indexed 
  representation for distributed updates. (Michael Garski, yonik, Mark Miller)

* SOLR-3780: Maven build: Make solrj tests run separately from solr-core.
  (Steve Rowe)
  
* SOLR-3772: Optionally, on cluster startup, we can wait until we see all registered 
  replicas before running the leader process - or if they all do not come up, 
  N amount of time. (Jan Høydahl, Per Steffensen, Mark Miller)

* SOLR-3750: Optionally, on session expiration, we can explicitly wait some time before
  running the leader sync process so that we are sure every node participates.
  (Per Steffensen, Mark Miller)

* SOLR-3824: Velocity: Error messages from search not displayed (janhoy)

* SOLR-3826: Test framework improvements for specifying coreName on initCore
  (Amit Nithian, hossman)
  
* SOLR-3749: Allow default UpdateLog syncLevel to be configured by
  solrconfig.xml (Raintung Li, Mark Miller)

* SOLR-3845: Rename numReplicas to replicationFactor in Collections API.
  (yonik, Mark Miller)

* SOLR-3815: SolrCloud - Add properties such as "range" to shards, which changes
  the clusterstate.json and puts the shard replicas under "replicas". (yonik)

* SOLR-3871: SyncStrategy should use an executor for the threads it creates to
  request recoveries. (Mark Miller)
  
* SOLR-3870: SyncStrategy should have a close so it can abort earlier on 
  shutdown. (Mark Miller)


==================  4.0.0-BETA ===================


Versions of Major Components
---------------------
Apache Tika 1.1
Carrot2 3.5.0
Velocity 1.6.4 and Velocity Tools 2.0
Apache UIMA 2.3.1
Apache ZooKeeper 3.3.6

Upgrading from Solr 4.0.0-ALPHA
----------------------

Solr is now much more strict about requiring that the uniqueKeyField feature 
(if used) must refer to a field which is not multiValued.  If you upgrade from 
an earlier version of Solr and see an error that your uniqueKeyField "can not 
be configured to be multivalued" please add 'multiValued="false"' to the 
<field /> declaration for your uniqueKeyField.  See SOLR-3682 for more details.

Detailed Change List
----------------------

New Features
----------------------

* LUCENE-4201: Added JapaneseIterationMarkCharFilterFactory to normalize Japanese
  iteration marks. (Robert Muir, Christian Moen)

* SOLR-1856: In Solr Cell, literals should override Tika-parsed values.
  Patch adds a param "literalsOverride" which defaults to true, but can be set 
  to "false" to let Tika-parsed values be appended to literal values (Chris Harris, janhoy)
  
* SOLR-3488: Added a Collection management API for SolrCloud.
  (Tommaso Teofili, Sami Siren, yonik, Mark Miller)

* SOLR-3559: Full deleteByQuery support with SolrCloud distributed indexing.
  All replicas of a shard will be consistent, even if updates arrive in a
  different order on different replicas.  (yonik)

* SOLR-1929: Index encrypted documents with ExtractingUpdateRequestHandler.
  By supplying resource.password=<mypw> or specifying an external file with regular
  expressions matching file names, Solr will decrypt and index PDFs and DOCX formats.
  (janhoy, Yiannis Pericleous)

* SOLR-3562: Add options to remove instance dir or data dir on core unload.
  (Mark Miller, Per Steffensen)

* SOLR-2702: The default directory factory was changed to NRTCachingDirectoryFactory 
  which wraps the StandardDirectoryFactory and caches small files for improved
  Near Real-time (NRT) performance. (Mark Miller, yonik)
  
* SOLR-2616: Include a sample java util logging configuration file. 
  (David Smiley, Mark Miller)
 
* SOLR-3460: Add cloud-scripts directory and a zkcli.sh|bat tool for easy scripting
  and interaction with ZooKeeper. (Mark Miller)

* SOLR-1725: StatelessScriptUpdateProcessorFactory allows users to implement
  the full ScriptUpdateProcessor API using any scripting language with a 
  javax.script.ScriptEngineFactory
  (Uri Boness, ehatcher, Simon Rosenthal, hossman)

* SOLR-139: Change to updateable documents to create the document if it doesn't
  already exist.  To assert that the document must exist, use the optimistic
  concurrency feature by specifying a _version_ of 1.  (yonik)

* LUCENE-2510, LUCENE-4044: Migrated Solr's Tokenizer-, TokenFilter-, and
  CharFilterFactories to the lucene-analysis module. To add new analysis
  modules to Solr (like ICU, SmartChinese, Morfologik,...), just drop in
  the JAR files from Lucene's binary distribution into your Solr instance's
  lib folder. The factories are automatically made available with SPI.
  (Chris Male, Robert Muir, Uwe Schindler)

* SOLR-3634, SOLR-3635: CoreContainer and CoreAdminHandler will now remember 
  and report back information about failures to initialize SolrCores.  These 
  failures will be accessible from the web UI and CoreAdminHandler STATUS 
  command until they are "reset" by creating/renaming a SolrCore with the 
  same name.  (hossman, steffkes)

* SOLR-1280: Added commented-out example of the new script update processor
  to the example configuration.  See http://wiki.apache.org/solr/ScriptUpdateProcessor (ehatcher)

* SOLR-3672: SimplePostTool: Improvements for posting files
  Support for auto mode, recursive and wildcards (janhoy)

Optimizations
----------------------

* SOLR-3708: Add hashCode to ClusterState so that structures built based on the 
  ClusterState can be easily cached. (Mark Miller)

* SOLR-3709: Cache the url list created from the ClusterState in CloudSolrServer on each 
  request. (Mark Miller, yonik)
  
* SOLR-3710: Change CloudSolrServer so that update requests are only sent to leaders by 
  default. (Mark Miller)

Bug Fixes
----------------------

* SOLR-3582: Our ZooKeeper watchers respond to session events as if they are change events, 
  creating undesirable side effects. (Trym R. Møller, Mark Miller)

* SOLR-3467: ExtendedDismax escaping is missing several reserved characters
  (Michael Dodsworth via janhoy)
  
* SOLR-3587: After reloading a SolrCore, the original Analyzer is still used rather than a new 
  one. (Alexey Serba, yonik, rmuir, Mark Miller)
  
* LUCENE-4185: Fix a bug where CharFilters were wrongly being applied twice. (Michael Froh, rmuir)

* SOLR-3610: After reloading a core, indexing would fail on any newly added fields to the schema. (Brent Mills, rmuir)

* SOLR-3377: edismax fails to correctly parse a fielded query wrapped by parens.
  This regression was introduced in 3.6.  (Bernd Fehling, Jan Høydahl, yonik)
  
* SOLR-3621: Fix rare concurrency issue when opening a new IndexWriter for replication or rollback.
  (Mark Miller)

* SOLR-1781: Replication index directories not always cleaned up. 
  (Markus Jelsma, Terje Sten Bjerkseth, Mark Miller)

* SOLR-3639: Update ZooKeeper to 3.3.6 for a variety of bug fixes. (Mark Miller)

* SOLR-3629: Typo in solr.xml persistence when overriding the solrconfig.xml 
  file name using the "config" attribute prevented the override file from being
  used. (Ryan Zezeski, hossman)

* SOLR-3642: Correct broken check for multivalued fields in stats.facet
  (Yandong Yao, hossman)

* SOLR-3660: Velocity: Link to admin page broken (janhoy)

* SOLR-3658: Adding thousands of docs with one UpdateProcessorChain instance can briefly create
  spikes of threads in the thousands. (yonik, Mark Miller)

* SOLR-3656: A core reload now always uses the same dataDir.  (Mark Miller, yonik)

* SOLR-3662: Core reload bugs: a reload always obtained a non-NRT searcher, which
  could go back in time with respect to the previous core's NRT searcher.  Versioning
  did not work correctly across a core reload, and update handler synchronization
  was changed to synchronize on core state since more than on update handler
  can coexist for a single index during a reload. (yonik)
  
* SOLR-3663: There are a couple of bugs in the sync process when a leader goes down and a 
  new leader is elected. (Mark Miller)

* SOLR-3623: Fixed inconsistent treatment of third-party dependencies for 
  solr contribs analysis-extras & uima (hossman) 

* SOLR-3652: Fixed range faceting to error instead of looping infinitely 
  when 'gap' is zero -- or effectively zero due to floating point arithmetic 
  underflow. (hossman)

* SOLR-3648: Fixed VelocityResponseWriter template loading in SolrCloud mode.
  For the example configuration, this means /browse now works with SolrCloud.
  (janhoy, ehatcher)

* SOLR-3677: Fixed misleading error message in web ui to distinguish between
  no SolrCores loaded vs. no /admin/ handler available.
  (hossman, steffkes)
  
* SOLR-3428: SolrCmdDistributor flushAdds/flushDeletes can cause repeated 
  adds/deletes to be sent (Mark Miller, Per Steffensen)
  
* SOLR-3647: DistributedQueue should use our Solr zk client rather than the std zk 
  client. ZooKeeper expiration can be permanent otherwise. (Mark Miller)

Other Changes
----------------------

* SOLR-3524: Make discarding punctuation configurable in JapaneseTokenizerFactory.
  The default is to discard punctuation, but this is overridable as an expert option.
  (Kazuaki Hiraga, Jun Ohtani via Christian Moen)

* SOLR-1770: Move the default core instance directory into a collection1 folder.
  (Mark Miller)
  
* SOLR-3355: Add shard and collection to SolrCore statistics. (Michael Garski, Mark Miller)

* SOLR-3575: solr.xml should default to persist=true (Mark Miller)

* SOLR-3563: Unloading all cores in a SolrCloud collection will now cause the removal of
  that collection's meta data from ZooKeeper. (Mark Miller, Per Steffensen)

* SOLR-3599: Add zkClientTimeout to solr.xml so that it's obvious how to change it and so 
  that you can change it with a system property. (Mark Miller)

* SOLR-3609: Change Solr's expanded webapp directory to be at a consistent path called
  solr-webapp rather than a temporary directory. (Mark Miller)
  
* SOLR-3600: Raise the default zkClientTimeout from 10 seconds to 15 seconds. (Mark Miller)

* SOLR-3215: Clone SolrInputDocument when distrib indexing so that update processors after
  the distrib update process do not process the document twice. (Mark Miller)

* SOLR-3683: Improved error handling if an <analyzer> contains both an 
  explicit class attribute, as well as nested factories. (hossman)

* SOLR-3682: Fail to parse schema.xml if uniqueKeyField is multivalued (hossman)

* SOLR-2115: DIH no longer requires the "config" parameter to be specified in solrconfig.xml.
  Instead, the configuration is loaded and parsed with every import.  This allows the use of
  a different configuration with each import, and makes correcting configuration errors simpler.
  Also, the configuration itself can be passed using the "dataConfig" parameter rather than
  using a file (this previously worked in debug mode only).  When configuration errors are 
  encountered, the error message is returned in XML format.  (James Dyer)
  
* SOLR-3439: Make SolrCell easier to use out of the box. Also improves "/browse" to display
  rich-text documents correctly, along with facets for author and content_type.  
  With the new "content" field, highlighting of body is supported. See also SOLR-3672 for
  easier posting of a whole directory structure. (Jack Krupansky, janhoy)
  
* SOLR-3579: SolrCloud view should default to the graph view rather than tree view.
  (steffkes, Mark Miller)

==================  4.0.0-ALPHA ==================
More information about this release, including any errata related to the 
release notes, upgrade instructions, or other changes may be found online at:
   https://wiki.apache.org/solr/Solr4.0


Versions of Major Components
---------------------
Apache Tika 1.1
Carrot2 3.5.0
Velocity 1.6.4 and Velocity Tools 2.0
Apache UIMA 2.3.1
Apache ZooKeeper 3.3.4


Upgrading from Solr 3.6-dev
----------------------

* The Lucene index format has changed and as a result, once you upgrade, 
  previous versions of Solr will no longer be able to read your indices.
  In a master/slave configuration, all searchers/slaves should be upgraded
  before the master.  If the master were to be updated first, the older
  searchers would not be able to read the new index format.

* Setting abortOnConfigurationError=false is no longer supported
  (since it has never worked properly).  Solr will now warn you if
  you attempt to set this configuration option at all. (see SOLR-1846)

* The default logic for the 'mm' param of the 'dismax' QParser has
  been changed.  If no 'mm' param is specified (either in the query,
  or as a default in solrconfig.xml) then the effective value of the
  'q.op' param (either in the query or as a default in solrconfig.xml
  or from the 'defaultOperator' option in schema.xml) is used to
  influence the behavior.  If q.op is effectively "AND" then mm=100%.
  If q.op is effectively "OR" then mm=0%.  Users who wish to force the
  legacy behavior should set a default value for the 'mm' param in
  their solrconfig.xml file.
  
* The VelocityResponseWriter is no longer built into the core.  Its JAR and
  dependencies now need to be added (via <lib> or solr/home lib inclusion),
  and it needs to be registered in solrconfig.xml like this:
    <queryResponseWriter name="velocity" class="solr.VelocityResponseWriter"/>

* The update request parameter to choose Update Request Processor Chain is 
  renamed from "update.processor" to "update.chain". The old parameter was
  deprecated but still working since Solr3.2, but is now removed
  entirely.

* The <indexDefaults> and <mainIndex> sections of solrconfig.xml are discontinued
  and replaced with the <indexConfig> section. There are also better defaults.
  When migrating, if you don't know what your old settings mean, simply delete
  both <indexDefaults> and <mainIndex> sections. If you have customizations,
  put them in <indexConfig> section - with same syntax as before.

* Two of the SolrServer subclasses in SolrJ were renamed/replaced.
  CommonsHttpSolrServer is now HttpSolrServer, and 
  StreamingUpdateSolrServer is now ConcurrentUpdateSolrServer.

* The PingRequestHandler no longer looks for a <healthcheck/> option in the 
  (legacy) <admin> section of solrconfig.xml.  Users who wish to take 
  advantage of this feature should configure a "healthcheckFile" init param 
  directly on the  PingRequestHandler.  As part of this change, relative file 
  paths have been fixed to be resolved against the data dir.  See the example 
  solrconfig.xml and SOLR-1258 for more details.

* Due to low level changes to support SolrCloud, the uniqueKey field can no 
  longer be populated via <copyField/> or <field default=...> in the 
  schema.xml.  Users wishing to have Solr automatically generate a uniqueKey 
  value when adding documents should instead use an instance of
  solr.UUIDUpdateProcessorFactory in their update processor chain.  See 
  SOLR-2796 for more details.


Detailed Change List
----------------------

New Features
----------------------

* SOLR-3272: Solr filter factory for MorfologikFilter (Polish lemmatisation).
  (Rafał Kuć via Dawid Weiss, Steven Rowe, Uwe Schindler).

* SOLR-571: The autowarmCount for LRUCaches (LRUCache and FastLRUCache) now 
  supports "percentages" which get evaluated  relative the current size of 
  the cache when warming happens. 
  (Tomás Fernández Löbbe and hossman)

* SOLR-1932: New relevancy function queries: termfreq, tf, docfreq, idf
  norm, maxdoc, numdocs. (yonik)

* SOLR-1665: Add debug component options for timings, results and query info only (gsingers, hossman, yonik)

* SOLR-2112: Solrj API now supports streaming results. (ryan)

* SOLR-792: Adding PivotFacetComponent for Hierarchical faceting
  (ehatcher, Jeremy Hinegardner, Thibaut Lassalle, ryan)

* LUCENE-2507, SOLR-2571, SOLR-2576: Added DirectSolrSpellChecker, which uses Lucene's
  DirectSpellChecker to retrieve correction candidates directly from the term dictionary using
  levenshtein automata.  (James Dyer, rmuir)
   
* SOLR-1873, SOLR-2358: SolrCloud - added shared/central config and core/shard management via zookeeper,
  built-in load balancing, and distributed indexing. 
  (Jamie Johnson, Sami Siren, Ted Dunning, yonik, Mark Miller)
  Additional Work:
  - SOLR-2324: SolrCloud solr.xml parameters are not persisted by CoreContainer.
    (Massimo Schiavon, Mark Miller)
  - SOLR-2287: Allow users to query by multiple, compatible collections with SolrCloud.
    (Soheb Mahmood, Alex Cowell, Mark Miller)
  - SOLR-2622: ShowFileRequestHandler does not work in SolrCloud mode.
    (Stefan Matheis, Mark Miller)
  - SOLR-3108: Error in SolrCloud's replica lookup code when replica's are hosted in same Solr instance.
    (Bruno Dumon, Sami Siren, Mark Miller)
  - SOLR-3080: Remove shard info from zookeeper when SolrCore is explicitly unloaded.
    (yonik, Mark Miller, siren)
  - SOLR-3437: Recovery issues a spurious commit to the cluster. (Trym R. Møller via Mark Miller)
  - SOLR-2822: Skip update processors already run on other nodes (hossman)

* SOLR-1566: Transforming documents in the ResponseWriters.  This will allow
  for more complex results in responses and open the door for function queries
  as results. 
  (ryan with patches from grant, noble, cmale, yonik, Jan Høydahl,
  Arul Kalaipandian, Luca Cavanna, hossman)
  - SOLR-2037: Thanks to SOLR-1566, documents boosted by the QueryElevationComponent
    can be marked as boosted.  (gsingers, ryan, yonik)

* SOLR-2396: Add CollationField, which is much more efficient than 
  the Solr 3.x CollationKeyFilterFactory, and also supports 
  Locale-sensitive range queries. (rmuir)

* SOLR-2338: Add support for using <similarity/> in a schema's fieldType,
  for customizing scoring on a per-field basis. (hossman, yonik, rmuir)
  
* SOLR-2335: New 'field("...")' function syntax for referring to complex
  field names (containing whitespace or special characters) in functions.

* SOLR-2383: /browse improvements: generalize range and date facet display
  (Jan Høydahl via yonik)

* SOLR-2272: Pseudo-join queries / filters.  Examples:
  - To restrict to the set of parents with at least one blue-eyed child:
      fq={!join from=parent to=name}eyes:blue
  - To restrict to the set of children with at least one blue-eyed parent:
      fq={!join from=name to=parent}eyes:blue
  (yonik)

* SOLR-1942: Added the ability to select postings format per fieldType in schema.xml
  as well as support custom Codecs in solrconfig.xml.
  (simonw via rmuir)

* SOLR-2136: Boolean type added to function queries, along with
  new functions exists(), if(), and(), or(), xor(), not(), def(),
  and true and false constants. (yonik) 

* SOLR-2491: Add support for using spellcheck collation in conjunction
  with grouping. Note that the number of hits returned for collations
  is the number of ungrouped hits.  (James Dyer via rmuir)
  
* SOLR-1298: Return FunctionQuery as pseudo field.  The solr 'fl' param
  now supports functions.  For example:  fl=id,sum(x,y) -- NOTE: only
  functions with fast random access are recommended. (yonik, ryan)
  
* SOLR-705: Optionally return shard info with each document in distributed
  search.  Use fl=id,[shard]  to return the shard url.  (ryan)  

* SOLR-2417: Add explain info directly to return documents using 
  ?fl=id,[explain] (ryan)

* SOLR-2533: Converted ValueSource.ValueSourceSortField over to new rewriteable Lucene
  SortFields.  ValueSourceSortField instances must be rewritten before they can be used.
  This is done by SolrIndexSearcher when necessary. (Chris Male).

* SOLR-2193, SOLR-2565: You may now specify a 'soft' commit when committing. This will
  use Lucene's NRT feature to avoid guaranteeing documents are on stable storage in exchange
  for faster reopen times. There is also a new 'soft' autocommit tracker that can be
  configured. (Mark Miller, Robert Muir)

* SOLR-2399: Updated Solr Admin interface.  New look and feel with per core administration
  and many new options.  (Stefan Matheis via ryan)

* SOLR-1032: CSV handler now supports "literal.field_name=value" parameters.
  (Simon Rosenthal, ehatcher)

* SOLR-2656: realtime-get, efficiently retrieves the latest stored fields for specified
  documents, even if they are not yet searchable (i.e. without reopening a searcher)
  (yonik)
  
* SOLR-2703: Added support for Lucene's "surround" query parser. (Simon Rosenthal, ehatcher)

* SOLR-2754: Added factories for several ranking algorithms: 
    - BM25SimilarityFactory: Okapi BM25
    - DFRSimilarityFactory: Divergence from Randomness models
    - IBSimilarityFactory: Information-based models
    - LMDirichletSimilarity: LM with Dirichlet smoothing
    - LMJelinekMercerSimilarity: LM with Jelinek-Mercer smoothing
  (David Mark Nemeskey, Robert Muir)
 
* SOLR-2134 Trie* fields should support sortMissingLast=true, and deprecate Sortable* Field Types
  (Ryan McKinley, Mike McCandless, Uwe Schindler, Erick Erickson)
    
* SOLR-2438 added MultiTermAwareComponent to the various classes to allow automatic lowercasing
  for multiterm queries (wildcards, regex, prefix, range, etc). You can now optionally specify a
  "multiterm" analyzer in our schema.xml, but Solr should "do the right thing" if you don't
  specify <analyzer type="multiterm"> (Pete Sturge Erick Erickson, Mentoring from Seeley and Muir)

* SOLR-2481: Add support for commitWithin in DataImportHandler (Sami Siren via yonik)

* SOLR-2992: Add support for IndexWriter.prepareCommit() via prepareCommit=true
  on update URLs. (yonik)

* SOLR-2906: Added LFU cache options to Solr. (Shawn Heisey via Erick Erickson)

* SOLR-3069: Ability to add openSearcher=false to not open a searcher when doing
  a hard commit.  commitWithin now only invokes a softCommit. (yonik)

* SOLR-2802: New FieldMutatingUpdateProcessor and Factory to simplify the
  development of UpdateProcessors that modify field values of documents as 
  they are indexed. Also includes several useful new implementations:
    - RemoveBlankFieldUpdateProcessorFactory
    - TrimFieldUpdateProcessorFactory
    - HTMLStripFieldUpdateProcessorFactory
    - RegexReplaceProcessorFactory
    - FieldLengthUpdateProcessorFactory
    - ConcatFieldUpdateProcessorFactory
    - FirstFieldValueUpdateProcessorFactory
    - LastFieldValueUpdateProcessorFactory
    - MinFieldValueUpdateProcessorFactory
    - MaxFieldValueUpdateProcessorFactory
    - TruncateFieldUpdateProcessorFactory
    - IgnoreFieldUpdateProcessorFactory
  (hossman, janhoy)

* SOLR-3120: Optional post filtering for spatial queries bbox and geofilt
  for LatLonType. (yonik)

* SOLR-2459: Expose LogLevel selection with a RequestHandler rather then servlet
  (Stefan Matheis, Upayavira, ryan)

* SOLR-3134: Include shard info in distributed response when shards.info=true 
  (Russell Black, ryan)

* SOLR-2898: Support grouped faceting. (Martijn van Groningen)
  Additional Work:
  - SOLR-3406: Extended grouped faceting support to facet.query and facet.range parameters.
               (David Boychuck, Martijn van Groningen)

* SOLR-2949: QueryElevationComponent is now supported with distributed search.
  (Mark Miller, yonik)

* SOLR-3221: Added the ability to directly configure aspects of the concurrency
 and thread-pooling used within distributed search in solr. This allows for finer
 grained controlled and can be tuned by end users to target their own specific
 requirements. This builds on the work of the HttpCommComponent and uses the same configuration
 block to configure the thread pool. The default configuration has
 the same behaviour as solr 3.5, favouring throughput over latency. More
 information can be found on the wiki (http://wiki.apache.org/solr/SolrConfigXml) (Greg Bowyer)

* SOLR-3278: Negative boost support to the Extended Dismax Query Parser Boost Query (bq).
  (James Dyer)

* SOLR-3255: OpenExchangeRates.Org Exchange Rate Provider for CurrencyField (janhoy)

* SOLR-3358: Logging events are captured and available from the /admin/logging 
  request handler. (ryan)
  
* SOLR-1535: PreAnalyzedField type provides a functionality to index (and optionally store)
  field content that was already processed and split into tokens using some external processing
  chain. Serialization format is pluggable, and defaults to JSON. (ab)

* SOLR-3363: Consolidated Exceptions in Analysis Factories so they only throw 
  InitializationExceptions (Chris Male)

* SOLR-2690: New support for a "TZ" request param which overrides the TimeZone 
  used when rounding Dates in DateMath expressions for the entire request 
  (all date range queries and date faceting is affected).  The default TZ
  is still UTC.  (David Schlotfeldt, hossman)

* SOLR-3402: Analysis Factories are now configured with their Lucene Version
  throw setLuceneMatchVersion, rather than through the Map passed to init.
  Parsing and simple error checking for the Version is now done inside
  the code that creates the Analysis Factories. (Chris Male)

* SOLR-3178: Optimistic locking.  If a _version_ is provided with an update
  that does not match the version in the index, an HTTP 409 error (Conflict)
  will result.  (Per Steffensen, yonik)

* SOLR-139: Updateable documents.  JSON Example:
  {"id":"mydoc", "f1":{"set":10}, "f2":{"add":20}}  will result in field "f1"
  being set to 10, "f2" having an additional value of 20 added, and all
  other existing fields unchanged.  All source fields must be stored for
  this feature to work correctly.  (Ryan McKinley, Erik Hatcher, yonik)

* SOLR-2857: Support XML,CSV,JSON, and javabin in a single RequestHandler and 
  choose the correct ContentStreamLoader based on Content-Type header.  This
  also deprecates the existing [Xml,JSON,CSV,Binary,Xslt]UpdateRequestHandler.
  (ryan)
  
* SOLR-2585: Context-Sensitive Spelling Suggestions & Collations.  This adds support
  for the "spellcheck.alternativeTermCount" & "spellcheck.maxResultsForSuggest" 
  parameters, letting users receive suggestions even when all the queried terms 
  exist in the dictionary.  This differs from "spellcheck.onlyMorePopular" in
  that the suggestions need not consist entirely of terms with a greater document
  frequency than the queried terms. (James Dyer)

* SOLR-2058: Edismax query parser to allow "phrase slop" to be specified per-field
  on the pf/pf2/pf3 parameters using optional "FieldName~slop^boost" syntax.  The
  prior "FieldName^boost" syntax is still accepted.  In such cases the value on the
  "ps" parameter serves as the default slop.  (Ron Mayer via James Dyer)

* SOLR-3495: New UpdateProcessors have been added to create default values for 
  configured fields.  These works similarly to the <field default="..."/> 
  option in schema.xml, but are applied in the UpdateProcessorChain, so they 
  may be used prior to other UpdateProcessors, or to generate a uniqueKey field 
  value when using the DistributedUpdateProcessor (ie: SolrCloud)
    TimestampUpdateProcessorFactory
    UUIDUpdateProcessorFactory
    DefaultValueUpdateProcessorFactory
  (hossman)
  
* SOLR-2993: Add WordBreakSolrSpellChecker to offer suggestions by combining adjacent 
  query terms and/or breaking terms into multiple words.  This spellchecker can be 
  configured with a traditional checker (ie: DirectSolrSpellChecker).  The results 
  are combined and collations can contain a mix of corrections from both spellcheckers.  
  (James Dyer)

* SOLR-3508: Simplify JSON update format for deletes as well as allow
  version specification for optimistic locking.  Examples:
    - {"delete":"myid"}
    - {"delete":["id1","id2","id3"]}
    - {"delete":{"id":"myid", "_version_":123456789}}
  (yonik)

* SOLR-3211:  Allow parameter overrides in conjunction with "spellcheck.maxCollationTries".
  To do so, use parameters starting with "spellcheck.collateParam."  For instance, to
  override the "mm" parameter, specify "spellcheck.collateParam.mm".  This is helpful
  in cases where testing spellcheck collations for result counts should use different
  parameters from the main query (James Dyer)

* SOLR-2599: CloneFieldUpdateProcessorFactory provides similar functionality 
  to schema.xml's <copyField/> declaration but as an update processor that can 
  be combined with other processors in any order. (Jan Høydahl & hossman)

* SOLR-3351: eDismax: ps2 and ps3 params (janhoy)

* SOLR-3542: Add WeightedFragListBuilder for FVH and set it to default fragListBuilder
  in example solrconfig.xml. (Sebastian Lutze, koji)

* SOLR-2396: Add ICUCollationField to contrib/analysis-extras, which is much 
  more efficient than the Solr 3.x ICUCollationKeyFilterFactory, and also 
  supports Locale-sensitive range queries.  (rmuir)


Optimizations
----------------------

* SOLR-1875: Per-segment field faceting for single valued string fields.
  Enable with facet.method=fcs, control the number of threads used with
  the "threads" local param on the facet.field param.  This algorithm will
  only be faster in the presence of rapid index changes.  (yonik)

* SOLR-1904: When facet.enum.cache.minDf > 0 and the base doc set is a
  SortedIntSet, convert to HashDocSet for better performance. (yonik)

* SOLR-2092: Speed up single-valued and multi-valued "fc" faceting. Typical
  improvement is 5%, but can be much greater (up to 10x faster) when facet.offset
  is very large (deep paging). (yonik)
  
* SOLR-2193, SOLR-2565: The default Solr update handler has been improved so
  that it uses fewer locks, keeps the IndexWriter open rather than closing it
  on each commit (ie commits no longer wait for background merges to complete), 
  works with SolrCore to provide faster 'soft' commits, and has an improved API 
  that requires less instanceof special casing. (Mark Miller, Robert Muir)
  Additional Work:
  - SOLR-2697: commit and autocommit operations don't reset
    DirectUpdateHandler2.numDocsPending stats attribute.
    (Alexey Serba, Mark Miller)

* SOLR-2950: The QueryElevationComponent now avoids using the FieldCache and looking up
  every document id (gsingers, yonik)

Bug Fixes
----------------------
* SOLR-3139: Make ConcurrentUpdateSolrServer send UpdateRequest.getParams()
  as HTTP request params (siren) 

* SOLR-3165: Cannot use DIH in Solrcloud + Zookeeper (Alexey Serba, 
  Mark Miller, siren)

* SOLR-3068: Occasional NPE in ThreadDumpHandler (siren)

* SOLR-2762: FSTLookup could return duplicate results or one results less
  than requested. (David Smiley, Dawid Weiss)

* SOLR-2741: Bugs in facet range display in trunk (janhoy)

* SOLR-1908: Fixed SignatureUpdateProcessor to fail to initialize on
  invalid config.  Specifically: a signatureField that does not exist,
  or overwriteDupes=true with a signatureField that is not indexed.
  (hossman)

* SOLR-1824: IndexSchema will now fail to initialize if there is a
  problem initializing one of the fields or field types. (hossman)

* SOLR-1928: TermsComponent didn't correctly break ties for non-text
  fields sorted by count. (yonik)

* SOLR-2107: MoreLikeThisHandler doesn't work with alternate qparsers. (yonik)

* SOLR-2108: Fixed false positives when using wildcard queries on fields with reversed
  wildcard support. For example, a query of *zemog* would match documents that contain
  'gomez'.  (Landon Kuhn via Robert Muir)

* SOLR-1962: SolrCore#initIndex should not use a mix of indexPath and newIndexPath (Mark Miller)

* SOLR-2275: fix DisMax 'mm' parsing to be tolerant of whitespace
  (Erick Erickson via hossman)
  
* SOLR-2193, SOLR-2565, SOLR-2651: SolrCores now properly share IndexWriters across SolrCore reloads.
  (Mark Miller, Robert Muir)
  Additional Work:
  - SOLR-2705: On reload, IndexWriterProvider holds onto the initial SolrCore it was created with.
    (Yury Kats, Mark Miller)

* SOLR-2682: Remove addException() in SimpleFacet. FacetComponent no longer catches and embeds
  exceptions occurred during facet processing, it throws HTTP 400 or 500 exceptions instead. (koji)

* SOLR-2654: Directorys used by a SolrCore are now closed when they are no longer used.
  (Mark Miller)
  
* SOLR-2854: Now load URL content stream data (via stream.url) when called for during request handling,
  rather than loading URL content streams automatically regardless of use.
  (David Smiley and Ryan McKinley via ehatcher)
  
* SOLR-2829: Fix problem with false-positives due to incorrect
  equals methods. (Yonik Seeley, Hossman, Erick Erickson. 
  Marc Tinnemeyer caught the bug)  

* SOLR-2848: Removed 'instanceof AbstractLuceneSpellChecker' hacks from distributed spellchecking code,
  and added a merge() method to SolrSpellChecker instead. Previously if you extended SolrSpellChecker
  your spellchecker would not work in distributed fashion.  (James Dyer via rmuir)
  
* SOLR-2509: StringIndexOutOfBoundsException in the spellchecker collate when the term contains
  a hyphen. (Thomas Gambier caught the bug, Steffen Godskesen did the patch, via Erick Erickson)

* SOLR-1730: Made it clearer when a core failed to load as well as better logging when the
  QueryElevationComponent fails to properly initialize (gsingers)
  
* SOLR-1520: QueryElevationComponent now supports non-string ids (gsingers)

* SOLR-3037: When using binary format in solrj the codec screws up parameters
  (Sami Siren, Jörg Maier  via yonik)

* SOLR-3062: A join in the main query was not respecting any filters pushed
  down to it via acceptDocs since LUCENE-1536. (Mike Hugo, yonik)
  
* SOLR-3214: If you use multiple fl entries rather than a comma separated list, all but the first
  entry can be ignored if you are using distributed search. (Tomás Fernández Löbbe via Mark Miller)
 
* SOLR-3352: eDismax: pf2 should kick in for a query with 2 terms (janhoy)

* SOLR-3361: ReplicationHandler "maxNumberOfBackups" doesn't work if backups are triggered on commit
  (James Dyer, Tomás Fernández Löbbe)

* SOLR-2605: fixed tracking of the 'defaultCoreName' in CoreContainer so that
  CoreAdminHandler could return consistent information regardless of whether
  there is a a default core name or not. (steffkes, hossman)

* SOLR-3370: fixed CSVResponseWriter to respect globs in the 'fl' param
  (Keith Fligg via hossman)

* SOLR-3436: Group count incorrect when not all shards are queried in the second
  pass. (Francois Perron, Martijn van Groningen)

* SOLR-3454: Exception when using result grouping with main=true and using
  wt=javabin. (Ludovic Boutros, Martijn van Groningen)

* SOLR-3446: Better errors when PatternTokenizerFactory is configured with 
  an invalid pattern, and include the 'name' whenever possible in plugin init 
  error messages. (hossman)

* LUCENE-4075: Cleaner path usage in TestXPathEntityProcessor
  (Greg Bowyer via hossman)
  
* SOLR-2923: IllegalArgumentException when using useFilterForSortedQuery on an 
  empty index. (Adrien Grand via Mark Miller)

* SOLR-2352: Fixed TermVectorComponent so that it will not fail if the fl 
  param contains globs or psuedo-fields (hossman)

* SOLR-3541: add missing solrj dependencies to binary packages.
  (Thijs Vonk via siren)

* SOLR-3522: fixed parsing of the 'literal()' function (hossman)

* SOLR-3548: Fixed a bug in the cachability of queries using the {!join}
  parser or the strdist() function, as well as some minor improvements to 
  the hashCode implementation of {!bbox} and {!geofilt} queries.
  (hossman)

* SOLR-3470: contrib/clustering: custom Carrot2 tokenizer and stemmer factories
  are respected now (Stanislaw Osinski, Dawid Weiss)

* SOLR-3430: Added a new DIH test against a real SQL database.  Fixed problems 
  revealed by this new test related to  the expanded cache support added to 
  3.6/SOLR-2382 (James Dyer)
             
* SOLR-1958: When using the MailEntityProcessor, import would fail if 
  fetchMailsSince was not specified. (Max Lynch via James Dyer) 

* SOLR-4289: Admin UI - JVM memory bar - dark grey "used" width is too small
  (steffkes, elyograg)

Other Changes
----------------------

* SOLR-1846: Eliminate support for the abortOnConfigurationError
  option.  It has never worked very well, and in recent versions of
  Solr hasn't worked at all.  (hossman)

* SOLR-1889: The default logic for the 'mm' param of DismaxQParser and
  ExtendedDismaxQParser has been changed to be determined based on the
  effective value of the 'q.op' param (hossman)

* SOLR-1946: Misc improvements to the SystemInfoHandler: /admin/system
  (hossman)

* SOLR-2289: Tweak spatial coords for example docs so they are a bit
  more spread out (Erick Erickson via hossman)

* SOLR-2288: Small tweaks to eliminate compiler warnings.  primarily
  using Generics where applicable in method/object declarations, and
  adding @SuppressWarnings("unchecked") when appropriate (hossman)

* SOLR-2375: Suggester Lookup implementations now store trie data
  and load it back on init. This means that large tries don't have to be
  rebuilt on every commit or core reload. (ab)

* SOLR-2413: Support for returning multi-valued fields w/o <arr> tag 
  in the XMLResponseWriter was removed.  XMLResponseWriter only 
  no longer work with values less then 2.2 (ryan)

* SOLR-2423: FieldType argument changed from String to Object
  Conversion from SolrInputDocument > Object > Fieldable is now managed
  by FieldType rather then DocumentBuilder.  (ryan)

* SOLR-2461: QuerySenderListener and AbstractSolrEventListener are 
  now public (hossman)

* LUCENE-2995: Moved some spellchecker and suggest APIs to modules/suggest:
  HighFrequencyDictionary, SortedIterator, TermFreqIterator, and the
  suggester APIs and implementations. (rmuir)

* SOLR-2576: Remove deprecated SpellingResult.add(Token, int).
  (James Dyer via rmuir)

* LUCENE-3232: Moved MutableValue classes to new 'common' module. (Chris Male)

* LUCENE-2883: FunctionQuery, DocValues (and its impls), ValueSource (and its
  impls) and BoostedQuery have been consolidated into the queries module.  They
  can now be found at o.a.l.queries.function.

* SOLR-2027: FacetField.getValues() now returns an empty list if there are no
  values, instead of null (Chris Male)

* SOLR-1825: SolrQuery.addFacetQuery now enables facets automatically, like
  addFacetField (Chris Male)

* SOLR-2663: FieldTypePluginLoader has been refactored out of IndexSchema 
  and made public. (hossman)

* SOLR-2331,SOLR-2691: Refactor CoreContainer's SolrXML serialization code and improve testing
  (Yury Kats, hossman, Mark Miller)
  
* SOLR-2698: Enhance CoreAdmin STATUS command to return index size.
  (Yury Kats, hossman, Mark Miller)
  
* SOLR-2654: The same Directory instance is now always used across a SolrCore so that
  it's easier to add other DirectoryFactory's without static caching hacks.
  (Mark Miller)

* LUCENE-3286: 'luke' ant target has been disabled due to incompatibilities with XML
  queryparser location (Chris Male)
  
* SOLR-1897: The data dir from the core descriptor should override the data dir from 
  the solrconfig.xml rather than the other way round. (Mark Miller)

* SOLR-2756: Maven configuration: Excluded transitive stax:stax-api dependency
  from org.codehaus.woodstox:wstx-asl dependency. (David Smiley via Steve Rowe)

* SOLR-2588: Moved VelocityResponseWriter back to contrib module in order to 
  remove it as a mandatory core dependency.  (ehatcher)
  
* SOLR-2862: More explicit lexical resources location logged if Carrot2 clustering
  extension is used. Fixed solr. impl. of IResource and IResourceLookup. (Dawid Weiss)

* SOLR-1123: Changed JSONResponseWriter to now use application/json as its Content-Type
  by default.  However the Content-Type can be overwritten and is set to text/plain in
  the example configuration. (Uri Boness, Chris Male)
  
* SOLR-2607: Removed deprecated client/ruby directory, which included solr-ruby and flare.
  (ehatcher)
  
* SOLR-3032: logOnce from SolrException logOnce and all the supporting
  structure is gone. abortOnConfigurationError is also gone as it is no longer referenced.
  Errors should be caught and logged at the top-most level or logged and NOT propagated up the 
  chain. (Erick Erickson)

* SOLR-2105: Remove support for deprecated "update.processor" (since 3.2), in favor of 
  "update.chain" (janhoy)

* SOLR-3005: Default QueryResponseWriters are now initialized via init() with an empty
  NamedList. (Gasol Wu, Chris Male)

* SOLR-2607: Removed obsolete client/ folder (ehatcher, Eric Pugh, janhoy)

* SOLR-3202, SOLR-3244: Dropping Support for JSP.  New Admin UI is all client side
  (ryan, Aliaksandr Zhuhrou, Uwe Schindler)

* SOLR-3159: Upgrade example and tests to run with Jetty 8 (ryan)

* SOLR-3254: Upgrade Solr to Tika 1.1 (janhoy)

* SOLR-3329: Dropped getSourceID() from SolrInfoMBean and using 
  getClass().getPackage().getSpecificationVersion() for Version. (ryan)

* SOLR-3302: Upgraded SLF4j to version 1.6.4 (hossman)

* SOLR-3322: Add more context to IndexReaderFactory.newReader (ab)

* SOLR-3343: Moved FastWriter, FileUtils, RegexFileFilter, RTimer and SystemIdResolver
  from org.apache.solr.common to org.apache.solr.util (Chris Male)

* SOLR-3357: ResourceLoader.newInstance now accepts a Class representation of the expected
  instance type (Chris Male)

* SOLR-3388: HTTP caching is now disabled by default for RequestUpdateHandlers. (ryan)

* SOLR-3309: web.xml now specifies metadata-complete=true (which requires 
  Servlet 2.5) to prevent servlet containers from scanning class annotations 
  on startup.  This allows for faster startup times on some servlet containers.
  (Bill Bell, hossman)

* SOLR-1893: Refactored some common code from LRUCache and FastLRUCache into 
  SolrCacheBase (Tomás Fernández Löbbe via hossman)

* SOLR-3403: Deprecated Analysis Factories now log their own deprecation messages.
  No logging support is provided by Factory parent classes. (Chris Male)

* SOLR-1258: PingRequestHandler is now directly configured with a 
  "healthcheckFile" instead of looking for the legacy 
  <admin><healthcheck/></admin> syntax.  Filenames specified as relative 
  paths have been fixed so that they are resolved against the data dir 
  instead of the CWD of the java process. (hossman)

* SOLR-3083: JMX beans now report Numbers as numeric values rather then String
  (Tagged Siteops, Greg Bowyer via ryan)

* SOLR-2796: Due to low level changes to support SolrCloud, the uniqueKey 
  field can no longer be populated via <copyField/> or <field default=...>
  in the schema.xml.

* SOLR-3534: The Dismax and eDismax query parsers will fall back on the 'df' parameter
  when 'qf' is absent.  And if neither is present nor the schema default search field
  then an exception will be thrown now. (dsmiley)

* SOLR-3262: The "threads" feature of DIH is removed (deprecated in Solr 3.6) 
  (James Dyer)

* SOLR-3422: Refactored DIH internal data classes.  All entities in 
  data-config.xml must have a name (James Dyer)
 
Documentation
----------------------

* SOLR-2232: Improved README info on solr.solr.home in examples
  (Eric Pugh and hossman)

==================  3.6.2  ==================

Bug Fixes
----------------------
* SOLR-3790: ConcurrentModificationException could be thrown when using hl.fl=*.
  (yonik, koji)

* SOLR-3589: Edismax parser does not honor mm parameter if analyzer splits a token.
  (Tom Burton-West, Robert Muir)

==================  3.6.1  ==================
More information about this release, including any errata related to the 
release notes, upgrade instructions, or other changes may be found online at:
   https://wiki.apache.org/solr/Solr3.6.1

Bug Fixes

* LUCENE-3969: Throw IAE on bad arguments that could cause confusing errors in
  PatternTokenizer. CommonGrams populates PositionLengthAttribute correctly.
  (Uwe Schindler, Mike McCandless, Robert Muir)
  
* SOLR-3361: ReplicationHandler "maxNumberOfBackups" doesn't work if backups are triggered on commit
  (James Dyer, Tomás Fernández Löbbe)

* SOLR-3375: Fix charset problems with HttpSolrServer (Roger Håkansson, yonik, siren)

* SOLR-3436: Group count incorrect when not all shards are queried in the second
  pass. (Francois Perron, Martijn van Groningen)

* SOLR-3454: Exception when using result grouping with main=true and using
  wt=javabin. (Ludovic Boutros, Martijn van Groningen)

* SOLR-3489: Config file replication less error prone (Jochen Just via janhoy)

* SOLR-3477: SOLR does not start up when no cores are defined (Tomás Fernández Löbbe via tommaso)

* SOLR-3470: contrib/clustering: custom Carrot2 tokenizer and stemmer factories
  are respected now (Stanislaw Osinski, Dawid Weiss)

* SOLR-3360: More DIH bug fixes for the deprecated "threads" parameter.  
  (Mikhail Khludnev, Claudio R, via James Dyer)

* SOLR-3430: Added a new DIH test against a real SQL database.  Fixed problems 
  revealed by this new test related to the expanded cache support added to 
  3.6/SOLR-2382 (James Dyer)

* SOLR-3336: SolrEntityProcessor substitutes most variables at query time.
  (Michael Kroh, Lance Norskog, via Martijn van Groningen)


==================  3.6.0  ==================
More information about this release, including any errata related to the 
release notes, upgrade instructions, or other changes may be found online at:
   https://wiki.apache.org/solr/Solr3.6

Upgrading from Solr 3.5
----------------------
* SOLR-2983: As a consequence of moving the code which sets a MergePolicy from SolrIndexWriter to SolrIndexConfig,
  (custom) MergePolicies should now have an empty constructor; thus an IndexWriter should not be passed as constructor
  parameter but instead set using the setIndexWriter() method.

* As doGet() methods in SimplePostTool was changed to static, the client applications of this
  class need to be recompiled.

* In Solr version 3.5 and earlier, HTMLStripCharFilter had known bugs in the
  character offsets it provided, triggering e.g. exceptions in highlighting.
  HTMLStripCharFilter has been re-implemented, addressing this and other
  issues.  See the entry for LUCENE-3690 in the Bug Fixes section below for a
  detailed list of changes.  For people who depend on the behavior of
  HTMLStripCharFilter in Solr version 3.5 and earlier: the old implementation
  (bugs and all) is preserved as LegacyHTMLStripCharFilter.

* As of Solr 3.6, the <indexDefaults> and <mainIndex> sections of solrconfig.xml are deprecated
  and replaced with a new <indexConfig> section. Read more in SOLR-1052 below.

* SOLR-3040: The DIH's admin UI (dataimport.jsp) now requires DIH request handlers to start with
  a '/'. (dsmiley)

* SOLR-3161: <requestDispatcher handleSelect="false"> is now the default. An existing config will
  probably work as-is because handleSelect was explicitly enabled in default configs. HandleSelect
  makes /select work as well as enables the 'qt' parameter. Instead, consider explicitly
  configuring /select as is done in the example solrconfig.xml, and register your other search
  handlers with a leading '/' which is a recommended practice.  (David Smiley, Erik Hatcher)

* SOLR-3161: Don't use the 'qt' parameter with a leading '/'.  It probably won't work in 4.0
  and it's now limited in 3.6 to SearchHandler subclasses that aren't lazy-loaded.

* SOLR-2724: Specifying <defaultSearchField> and <solrQueryParser defaultOperator="..."/> in
  schema.xml is now considered deprecated.  Instead you are encouraged to specify these via the "df"
  and "q.op" parameters in your request handler definition.  (David Smiley)

* Bugs found and fixed in the SignatureUpdateProcessor that previously caused 
  some documents to produce the same signature even when the configured fields 
  contained distinct (non-String) values.  Users of SignatureUpdateProcessor 
  are strongly advised that they should re-index as document signatures may 
  have now changed. (see SOLR-3200 & SOLR-3226 for details)

New Features
----------------------
* SOLR-2020: Add Java client that uses Apache Http Components http client (4.x).
  (Chantal Ackermann, Ryan McKinley, Yonik Seeley, siren)

* SOLR-2854: Now load URL content stream data (via stream.url) when called for during request handling,
  rather than loading URL content streams automatically regardless of use.
  (David Smiley and Ryan McKinley via ehatcher)

* SOLR-2904: BinaryUpdateRequestHandler should be able to accept multiple update requests from
  a stream (shalin)

* SOLR-1565: StreamingUpdateSolrServer supports RequestWriter API and therefore, javabin update
  format (shalin)
  
* SOLR-2438 added MultiTermAwareComponent to the various classes to allow automatic lowercasing
  for multiterm queries (wildcards, regex, prefix, range, etc). You can now optionally specify a
  "multiterm" analyzer in our schema.xml, but Solr should "do the right thing" if you don't
  specify <fieldType="multiterm"> (Pete Sturge Erick Erickson, Mentoring from Seeley and Muir)

* SOLR-2919: Added support for localized range queries when the analysis chain uses
  CollationKeyFilter or ICUCollationKeyFilter.  (Michael Sokolov, rmuir)

* SOLR-2982: Added BeiderMorseFilterFactory for Beider-Morse (BMPM) phonetic encoder. Upgrades
  commons-codec to version 1.6  (Brooke Schreier Ganz, rmuir)

* SOLR-1843: A new "rootName" attribute is now available when
  configuring <jmx/> in solrconfig.xml.  If this attribute is set,
  Solr will use it as the root name for all MBeans Solr exposes via
  JMX.  The default root name is "solr" followed by the core name.
  (Constantijn Visinescu, hossman)
  
* SOLR-2906: Added LFU cache options to Solr. (Shawn Heisey via Erick Erickson)

* SOLR-3036: Ability to specify overwrite=false on the URL for XML updates.
  (Sami Siren via yonik)

* SOLR-2603: Add the encoding function for alternate fields in highlighting.
  (Massimo Schiavon, koji)
  
* SOLR-1729: Evaluation of NOW for date math is done only once per request for
  consistency, and is also propagated to shards in distributed search.
  Adding a parameter NOW=<time_in_ms> to the request will override the
  current time.  (Peter Sturge, yonik, Simon Willnauer)
  
* SOLR-1709: Distributed support for Date and Numeric Range Faceting
  (Peter Sturge, David Smiley, hossman, Simon Willnauer)

* SOLR-3054, LUCENE-3671: Add TypeTokenFilterFactory that creates TypeTokenFilter
  that filters tokens based on their TypeAttribute.  (Tommaso Teofili via
  Uwe Schindler)

* LUCENE-3305, SOLR-3056: Added Kuromoji morphological analyzer for Japanese.
  See the 'text_ja' fieldtype in the example to get started.
  (Christian Moen, Masaru Hasegawa via Robert Muir)

* SOLR-1860: StopFilterFactory, CommonGramsFilterFactory, and 
  CommonGramsQueryFilterFactory can optionally read stopwords in Snowball
  format (specify format="snowball").  (Robert Muir)

* SOLR-3105: ElisionFilterFactory optionally allows the parameter 
  ignoreCase (default=false).  (Robert Muir)

* LUCENE-3714: Add WFSTLookupFactory, a suggester that uses a weighted FST
  for more fine-grained suggestions.  (Mike McCandless, Dawid Weiss, Robert Muir)

* SOLR-3143: Add SuggestQueryConverter, a QueryConverter intended for
  auto-suggesters. (Robert Muir)

* SOLR-3033: ReplicationHandler's backup command now supports a 'maxNumberOfBackups' 
  init param that can be used to delete all but the most recent N backups. (Torsten Krah, James Dyer)

* SOLR-2202: Currency FieldType, whith support for currencies and exchange rates
  (Greg Fodor & Andrew Morrison via janhoy, rmuir, Uwe Schindler)

* SOLR-3026: eDismax: Locking down which fields can be explicitly queried (user fields aka uf)
  (janhoy, hossmann, Tomás Fernández Löbbe)

* SOLR-2826: URLClassify Update Processor (janhoy)

* SOLR-2764: Create a NorwegianLightStemmer and NorwegianMinimalStemmer (janhoy)

* SOLR-3221: Added the ability to directly configure aspects of the concurrency
 and thread-pooling used within distributed search in solr. This allows for finer
 grained controlled and can be tuned by end users to target their own specific
 requirements. This builds on the work of the HttpCommComponent and uses the same configuration
 block to configure the thread pool. The default configuration has
 the same behaviour as solr 3.5, favouring throughput over latency. More
 information can be found on the wiki (http://wiki.apache.org/solr/SolrConfigXml) (Greg Bowyer)

* SOLR-2001: The query component will substitute an empty query that matches
  no documents if the query parser returns null.  This also prevents an
  exception from being thrown by the default parser if "q" is missing. (yonik)
  - SOLR-435: if q is "" then it's also acceptable. (dsmiley, hoss)

* SOLR-2919: Added parametric tailoring options to ICUCollationKeyFilterFactory.
  These can be used to customize range query/sort behavior, for example to
  support numeric collation, ignore punctuation/whitespace, ignore accents but
  not case, control whether upper/lowercase values are sorted first, etc.  (rmuir)

* SOLR-2346: Add a chance to set content encoding explicitly via content type 
  of stream for extracting request handler.  This is convenient when Tika's 
  auto detector cannot detect encoding, especially the text file is too short 
  to detect encoding. (koji)

* SOLR-1499: Added SolrEntityProcessor that imports data from another Solr core
  or instance based on a specified query.
  (Lance Norskog, Erik Hatcher, Pulkit Singhal, Ahmet Arslan, Luca Cavanna, 
  Martijn van Groningen)

* SOLR-3190: Minor improvements to SolrEntityProcessor. Add more consistency 
  between solr parameters and parameters used in SolrEntityProcessor and 
  ability to specify a custom HttpClient instance.
  (Luca Cavanna via Martijn van Groningen)

* SOLR-2382: Added pluggable cache support to DIH so that any Entity can be 
  made cache-able by adding the "cacheImpl" parameter.  Include 
  "SortedMapBackedCache" to provide in-memory caching (as previously this was 
  the only option when using CachedSqlEntityProcessor).  Users can provide 
  their own implementations of DIHCache for other caching strategies.  
  Deprecate CachedSqlEntityProcessor in favor of specifing "cacheImpl" with
  SqlEntityProcessor.  Make SolrWriter implement DIHWriter and allow the 
  possibility of pluggable Writers (DIH writing to something other than Solr). 
  (James Dyer, Noble Paul)


Optimizations
----------------------
* SOLR-1931: Speedup for LukeRequestHandler and admin/schema browser. New parameter
  reportDocCount defaults to 'false'. Old behavior still possible by specifying this as 'true'
  (Erick Erickson)

* SOLR-3012: Move System.getProperty("type") in postData() to main() and add type argument so that
  the client applications of SimplePostTool can set content type via method argument. (koji)

* SOLR-2888: FSTSuggester refactoring: internal storage is now UTF-8, 
  external sorting (on disk) prevents OOMs even with large data sets
  (the bottleneck is now FST construction), code cleanups and API cleanups.
  (Dawid Weiss, Robert Muir)

Bug Fixes
----------------------
* SOLR-3187 SystemInfoHandler leaks filehandles (siren)

* LUCENE-3820: Fixed invalid position indexes by reimplementing PatternReplaceCharFilter.
  This change also drops real support for boundary characters -- all input is prebuffered
  for pattern matching. (Dawid Weiss)

* SOLR-3068: Fixed NPE in ThreadDumpHandler (siren)

* SOLR-2912: Fixed File descriptor leak in ShowFileRequestHandler (Michael Ryan, shalin)

* SOLR-2819: Improved speed of parsing hex entities in HTMLStripCharFilter
  (Bernhard Berger, hossman)
	 	   
* SOLR-2509: StringIndexOutOfBoundsException in the spellchecker collate when the term contains
  a hyphen. (Thomas Gambier caught the bug, Steffen Godskesen did the patch, via Erick Erickson)

* SOLR-2955: Fixed IllegalStateException when querying with group.sort=score desc in sharded
             environment. (Steffen Elberg Godskesen, Martijn van Groningen)

* SOLR-2956: Fixed inconsistencies in the flags (and flag key) reported by 
  the LukeRequestHandler (hossman)

* SOLR-1730: Made it clearer when a core failed to load as well as better logging when the
  QueryElevationComponent fails to properly initialize (gsingers)

* SOLR-1520: QueryElevationComponent now supports non-string ids (gsingers)

* SOLR-3024: Fixed JSONTestUtil.matchObj, in previous releases it was not 
  respecting the 'delta' arg (David Smiley via hossman)
  
* SOLR-2542: Fixed DIH Context variables which were broken for all scopes other 
  then SCOPE_ENTITY (Linbin Chen & Frank Wesemann via hossman)

* SOLR-3042: Fixed Maven Jetty plugin configuration. 
  (David Smiley via Steve Rowe)

* SOLR-2970: CSV ResponseWriter returns fields defined as stored=false in schema (janhoy)

* LUCENE-3690, LUCENE-2208, SOLR-882, SOLR-42: Re-implemented
  HTMLStripCharFilter as a JFlex-generated scanner and moved it to
  lucene/contrib/analyzers/common/.  See below for a list of bug fixes and
  other changes.  To get the same behavior as HTMLStripCharFilter in Solr
  version 3.5 and earlier (including the bugs), use LegacyHTMLStripCharFilter,
  which is the previous implementation.

  Behavior changes from the previous version:

  - Known offset bugs are fixed.
  - The "Mark invalid" exceptions reported in SOLR-1283 are no longer
    triggered (the bug is still present in LegacyHTMLStripCharFilter).
  - The character entity "&apos;" is now always properly decoded.
  - More cases of <script> tags are now properly stripped.
  - CDATA sections are now handled properly.
  - Valid tag name characters now include the supplementary Unicode characters
    from Unicode character classes [:ID_Start:] and [:ID_Continue:].
  - Uppercase character entities "&QUOT;", "&COPY;", "&GT;", "&LT;", "&REG;",
    and "&AMP;" are now recognized and handled as if they were in lowercase.
  - The REPLACEMENT CHARACTER U+FFFD is now used to replace numeric character
    entities for unpaired UTF-16 low and high surrogates (in the range
    [U+D800-U+DFFF]).
  - Properly paired numeric character entities for UTF-16 surrogates are now
    converted to the corresponding code units.
  - Opening tags with unbalanced quotation marks are now properly stripped.
  - Literal "<" and ">" characters in opening tags, regardless of whether they
    appear inside quotation marks, now inhibit recognition (and stripping) of
    the tags.  The only exception to this is for values of event-handler
    attributes, e.g. "onClick", "onLoad", "onSelect".
  - A newline '\n' is substituted instead of a space for stripped HTML markup.
  - Nothing is substituted for opening and closing inline tags - they are
    simply removed.  The list of inline tags is (case insensitively): <a>,
    <abbr>, <acronym>, <b>, <basefont>, <bdo>, <big>, <cite>, <code>, <dfn>,
    <em>, <font>, <i>, <img>, <input>, <kbd>, <label>, <q>, <s>, <samp>,
    <select>, <small>, <span>, <strike>, <strong>, <sub>, <sup>, <textarea>,
    <tt>, <u>, and <var>.
  - HTMLStripCharFilterFactory now handles HTMLStripCharFilter's "escapedTags"
    feature: opening and closing tags with the given names, including any
    attributes and their values, are left intact in the output.
  (Steve Rowe)

* LUCENE-3717: Fixed offset bugs in TrimFilter, WordDelimiterFilter, and
  HyphenatedWordsFilter where they would create invalid offsets in
  some situations, leading to problems in highlighting.  (Robert Muir)

* SOLR-2280: commitWithin ignored for a delete query (Juan Grande via janhoy)

* SOLR-3073: Fixed 'Invalid UUID string' error when having an UUID field as
  the unique key and executing a distributed grouping request. (Devon Krisman, Martijn van Groningen)

* SOLR-3084: Fixed initialization error when using 
  <queryResponseWriter default="true" ... /> (Bernd Fehling and hossman)

* SOLR-3109: Fixed numerous redundant shard requests when using distributed grouping.
  (rblack via Martijn van Groningen)

* SOLR-3052: Fixed typo in distributed grouping parameters.
  (Martijn van Groningen, Grant Ingersoll)

* SOLR-2909: Add support for ResourceLoaderAware tokenizerFactories in synonym
  filter factories. (Tom Klonikowski, Jun Ohtani via Koji Sekiguchi)
  
* SOLR-3168: ReplicationHandler "numberToKeep" & "maxNumberOfBackups" parameters
  would keep only 1 backup, even if more than 1 was specified (Neil Hooey, James Dyer)

* SOLR-3009: hitGrouped.vm isn't shipped with 3.x (ehatcher, janhoy)

* SOLR-3195: timeAllowed is ignored for grouping queries
  (Russell Black via Martijn van Groningen)

* SOLR-2124: Do not log stack traces for "Service Disabled" / 503 Exceptions (PingRequestHandler, etc)
  (James Dyer, others)
  
* SOLR-3260: DataImportHandler: ScriptTransformer gives better error messages when 
  problems arise on initalization (no Script Engine, invalid script, etc). (James Dyer)

* SOLR-2959: edismax now respects the magic fields '_val_' and '_query_'
  (Michael Watts, hossman)

* SOLR-3074: fix SolrPluginUtils.docListToSolrDocumentList to respect the 
  list of fields specified.  This fix also deprecates 
  DocumentBuilder.loadStoredFields which is not used anywhere in Solr, 
  and was fundamentally broken/bizarre.
  (hossman, Ahmet Arslan)

* SOLR-2291: fix JSONWriter to respect field list when writing SolrDocuments
  (Ahmet Arslan via hossman)

* SOLR-3264: Fix CoreContainer and SolrResourceLoader logging to be more 
  clear about when SolrCores are being created, and stop misleading people 
  about SolrCore instanceDir's being the "Solr Home Dir" (hossman)

* SOLR-3046: Fix whitespace typo in DIH response "Time taken" (hossman)

* SOLR-3261: Fix edismax to respect query operators when literal colons 
  are used in query string.  (Juan Grande via hossman)

* SOLR-3226: Fix SignatureUpdateProcessor to no longer ignore non-String 
  field values (Spyros Kapnissis, hossman)

* SOLR-3200: Fix SignatureUpdateProcessor "all fields" mode to use all 
  fields of each document instead of the fields specified by the first 
  document indexed (Spyros Kapnissis via hossman)
  
* SOLR-3316: Distributed grouping failed when rows parameter was set to 0 and 
  sometimes returned a wrong hit count as matches. (Cody Young, Martijn van Groningen)

* SOLR-3107: contrib/langid: When using the LangDetect implementation of 
  langid, set the random seed to 0, so that the same document is detected as 
  the same language with the same probability every time.  
  (Christian Moen via rmuir)

* SOLR-2937: Configuring the number of contextual snippets used for 
  search results clustering. The hl.snippets parameter is now respected
  by the clustering plugin, can be overridden by carrot.summarySnippets
  if needed (Stanislaw Osinski).

* SOLR-2938: Clustering on multiple fields. The carrot.title and 
  carrot.snippet can now take comma- or space-separated lists of
  field names to cluster (Stanislaw Osinski).

* SOLR-2939: Clustering of multilingual search results. The document's
  language field be passed in the carrot.lang parameter, the carrot.lcmap
  parameter enables mapping of language codes to ISO 639 (Stanislaw Osinski).

* SOLR-2940: Passing values for custom Carrot2 fields to Clustering component. 
  The custom field mapping are defined using the carrot.custom parameter 
  (Stanislaw Osinski).

* SOLR-2941: NullPointerException on clustering component initialization 
  when schema does not have a unique key field (Stanislaw Osinski).

* SOLR-2942: ClassCastException when passing non-textual fields to  
  clustering component (Stanislaw Osinski).


Other Changes
----------------------
* SOLR-2922: Upgrade commons-io and commons-lang to 2.1 and 2.6, respectively. (koji)

* SOLR-2920: Refactor frequent conditional use of DefaultSolrParams and 
  AppendedSolrParams into factory methods.
  (David Smiley via hossman)
  
* SOLR-3032: Deprecate logOnce from SolrException logOnce and all the supporting
  structure will disappear in 4.0. Errors should be caught and logged at the
  top-most level or logged and NOT propagated up the chain. (Erick Erickson)

* SOLR-2718: Add ability to lazy load response writers, defined with startup="lazy".
  (ehatcher)

* SOLR-2901: Upgrade Solr to Tika 1.0 (janhoy)

* SOLR-3059: Example XSL stylesheet for indexing query result XML (janhoy)

* SOLR-3097, SOLR-3105: Add analysis configurations for different languages to 
  the example.  (Christian Moen, Robert Muir)

* SOLR-3005: Default QueryResponseWriters are now initialized via init() with an empty
  NamedList. (Gasol Wu, Chris Male)

* SOLR-3140: Upgrade schema version to 1.5, where omitNorms defaults to "true" for all
  primitive (non-analyzed) field types such as int, float, date, bool, string.. (janhoy)

* SOLR-3077: Better error messages when attempting to use "blank" field names 
  (Antony Stubbs via hossman)

* SOLR-2712: expecting fl=score to return all fields is now deprecated.  
  In solr 4.0, this will only return the score.  (ryan)

* SOLR-3156: Check for Lucene directory locks at startup. In previous versions
  this check was only performed during modifying (e.g. adding and deleting
  documents) the index. (Luca Cavanna via Martijn van Groningen)

* SOLR-1052: Deprecated <indexDefaults> and <mainIndex> in solrconfig.xml
  From now, all settings go in the new <indexConfig> tag, and some defaults are
  changed: useCompoundFile=false, ramBufferSizeMB=32, lockType=native, so that
  the effect of NOT specifying <indexConfig> at all gives same result as the
  example config used to give in 3.5 (janhoy, gsingers)

* SOLR-3294: In contrib/clustering/lib/, replaced the manually retrowoven
  Java 1.5-compatible carrot2-core-3.5.0.jar (which is not publicly available,
  except from the Solr Subversion repository), with newly released Java
  1.5-compatible carrot2-core-3.5.0.1.jar (hosted on the Maven Central
  repository).  Also updated dependencies jackson-core-asl and
  jackson-mapper-asl (both v1.5.2 -> v1.7.4).  (Dawid Weiss, Steve Rowe)

* SOLR-3295: netcdf jar is excluded from the binary release (and disabled in 
  ivy.xml) because it requires java 6. If you want to parse this content with 
  extracting request handler and are willing to use java 6, just add the jar. 
  (rmuir)

* SOLR-3142: DIH Imports no longer default optimize to true, instead false. 
  If you want to force all segments to be merged into one, you can specify 
  this parameter yourself. NOTE: this can be very expensive operation and 
  usually does not make sense for delta-imports.  (Robert Muir)

Build
----------------------
* SOLR-2487: Add build target to package war without slf4j jars (janhoy)

* SOLR-3112: Fix tests not to write to src/test-files (Luca Cavanna via Robert Muir)

* LUCENE-3753: Restructure the Solr build system. (Steve Rowe)

* SOLR-3204: The packaged pre-release artifact of Commons CSV used the original
  package name (org.apache.commons.csv). This created a compatibility issue as
  the Apache Commons team works toward an official release of Commons CSV.
  The source of Commons CSV was added under a separate package name to the
  Solr source code.  (Uwe Schindler, Chris Male, Emmanuel Bourg)  
 
* LUCENE-3930: