See Multi data path bug in Elasticsearch 5.3.0.
Also see Breaking changes in 5.3.
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Query DSL
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Fix name of
enabled_position_increments
#22895
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Search
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Remove DFS_QUERY_AND_FETCH as a search type #22787
Breaking Java changes
edit
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CRUD
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Make index and delete operation execute as single bulk item (backport of #21964) #22812 (issue: #21964)
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Internal
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Replace SearchExtRegistry with namedObject #22492
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Replace Suggesters with namedObject #22491
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Network
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Remove HttpServer and HttpServerAdapter in favor of a simple dispatch method #22636 (issue: #18482)
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Plugins
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Search
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Remove QUERY_AND_FETCH search type #22996
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Core
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Geo
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Geo distance range deprecation #22835
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Java API
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Add BulkProcessor methods with XContentType parameter #23078 (issue: #22691)
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Mapping
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Deprecate the include_in_all mapping parameter #22972 (issue: #22970)
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Network
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Plugin Repository Azure
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Plugin Repository S3
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S3 Repository: Deprecate specifying region #22848 (issue: #22758)
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S3 Repository: Deprecate auto creation of s3 bucket for repository #22843 (issue: #22761)
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Deprecate specifying credentials through env vars, sys props, and remove profile files #22567 (issues: #21041, #22479)
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REST
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Deprecate ldjson support and document ndjson for bulk/msearch #23051 (issues: #23025, #23049)
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Optionally require a valid content type for all rest requests with content #22691 (issue: #19388)
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Scripting
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Change Namespace for Stored Script to Only Use Id #22206
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Aggregations
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Initial version of an adjacency matrix using the Filters aggregation #22239 (issue: #22169)
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CRUD
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Allow an index to be partitioned with custom routing #22274 (issue: #21585)
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Highlighting
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Search
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Add federated cross-cluster search capabilities #22502 (issue: #21473)
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Add field collapsing for search request #22337 (issue: #21833)
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Settings
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Add infrastructure for elasticsearch keystore #22335
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Allocation
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Include stale replica shard info when explaining an unassigned primary #22826
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Analysis
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Analyze API Position Length Support #22574
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CRUD
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Make index and delete operation execute as a single bulk item #21964
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Circuit Breakers
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Add used memory amount to CircuitBreakingException message (#22521) #22693 (issue: #22521)
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Cluster
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Core
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Simplify write failure handling (backport of #19105) #22778 (issue: #19105)
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Simplify ElasticsearchException rendering as a XContent #22611
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Remove setLocalNode from ClusterService and TransportService #22608
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Engine
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Replace EngineClosedException with AlreadyClosedExcpetion #22631
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Index APIs
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Indexing: Add shard id to indexing operation listener #22606
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Better error when can’t auto create index #22488 (issues: #21448, #22435)
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Ingest
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Lazy load the geoip databases #23337
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Internal
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Improve connection closing in
RemoteClusterConnection
#22804 (issue: #22803)
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Remove some more usages of ParseFieldMatcher #22437 (issues: #19552, #22130)
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Introduce ToXContentObject interface #22387 (issue: #16347)
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Java API
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prevent NPE when trying to uncompress a null BytesReference #22386
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Java High Level REST Client
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Add parsing from xContent to MainResponse #22934
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Parse elasticsearch exception’s root causes #22924
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Add parsing method to BytesRestResponse’s error #22873
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Add parsing method for ElasticsearchException.generateThrowableXContent() #22783
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Add fromxcontent methods to delete response #22712 (issue: #22680)
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Add parsing methods for UpdateResponse #22586
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Add parsing from xContent to InternalSearchHit and InternalSearchHits #22429
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Add fromxcontent methods to index response #22229
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Java REST Client
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move ignore parameter support from yaml test client to low level rest client #22637
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Support Preemptive Authentication with RestClient #21336
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Logging
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Mapping
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Improve error message for ipv6 on legacy ip fields #23136 (issue: #23126)
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Network
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Keep the pipeline handler queue small initially #23335
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Packaging
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Plugin Discovery EC2
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Plugin Lang Painless
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Generate reference links for painless API #22775
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Painless: Add augmentation to String for base 64 #22665 (issue: #22648)
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Plugin Repository S3
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Plugins
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Add the ability to define search response listeners in search plugin #22682
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Query DSL
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QueryString and SimpleQueryString Graph Support #22541
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Additional Graph Support in Match Query #22503 (issue: #22490)
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RangeQuery WITHIN case now normalises query #22431 (issue: #22412)
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Reindex API
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Increase visibility of doExecute so it can be used directly #22614
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Improve error message when reindex-from-remote gets bad json #22536 (issue: #22330)
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Scripting
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Expose multi-valued dates to scripts and document painless’s date functions #22875 (issue: #22162)
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Search
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Add a setting to disable remote cluster connections on a node #23005
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First step towards separating individual search phases #22802
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Add parsing from xContent to SearchProfileShardResults and nested classes #22649
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ProfileResult and CollectorResult should print machine readable timing information #22638
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Settings
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Improve setting deprecation message #23156 (issue: #22849)
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Add secure settings validation on startup #22894
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Allow comma delimited array settings to have a space after each entry #22591 (issue: #22297)
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Allow affix settings to be dynamic / updatable #22526
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Allow affix settings to delegate to actual settings #22523
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Make s3 repository sensitive settings use secure settings #22479
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Snapshot/Restore
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Duplicate snapshot name throws InvalidSnapshotNameException #22921 (issue: #18228)
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Use general cluster state batching mechanism for snapshot state updates #22528 (issue: #14899)
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Stats
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CRUD
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Cache
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Invalidate cached query results if query timed out #22807 (issue: #22789)
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Cluster
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Don’t set local node on cluster state used for node join validation #23311 (issues: #21830, #3, #4, #6, #9)
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Allow a cluster state applier to create an observer and wait for a better state #23132 (issue: #21817)
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Cluster allocation explain to never return empty response body #23054
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Exceptions
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Stop returning "es." internal exception headers as http response headers #22703 (issue: #17593)
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Ingest
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Improve missing ingest processor error #23379 (issue: #23392)
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fix date-processor to a new default year for every new pipeline execution #22601 (issue: #22547)
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Internal
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Always restore the ThreadContext for operations delayed due to a block #23349
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Fix handling of document failure exception in InternalEngine (backport #22718) #22910
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Java REST Client
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RestClient asynchronous execution should not throw exceptions #23307
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Mapping
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Switch include_in_all in multifield to warning #23656 (issues: #21971, #23654)
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Fix MapperService StackOverflowError #23605 (issue: #23604)
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Range types causing
GetFieldMappingsIndexRequest
to fail due to NullPointerException
in RangeFieldMapper.doXContentBody
when include_defaults=true
is on the query string #22925
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Disallow introducing illegal object mappings (double ..) #22891 (issue: #22794)
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Network
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Packaging
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Fall back to non-atomic move when removing plugins #23548 (issue: #35)
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Parent/Child
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Add null check in case of orphan child document #22772 (issue: #22770)
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Plugin Ingest Attachment
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Plugin Lang Painless
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Fix Bad Casts In Painless #23282 (issue: #23238)
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Don’t allow casting from void to def in painless #22969 (issue: #22908)
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Fix def invoked qualified method refs #22918
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Plugins
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Add check for null pluginName in remove command #22930 (issue: #22922)
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Query DSL
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Fix parsing for
max_determinized_states
#22749 (issue: #22722)
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REST
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[API] change wait_for_completion default according to docs #23672
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HTTP transport stashes the ThreadContext instead of the RestController #23456
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Ensure we try to autodetect content type for handlers that support plain text #23452
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Fix date format in warning headers #23418 (issue: #23275)
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Correct warning header to be compliant #23275 (issue: #22986)
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Fix search scroll request with a plain text body #23183 (issue: #22691)
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Handle bad HTTP requests #23153 (issue: #23034)
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Properly encode location header #23133 (issues: #21057, #23115)
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Reindex API
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Reindex: do not log when can’t clear old scroll #22942 (issue: #22937)
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Fix reindex-from-remote from <2.0 #22931 (issue: #22893)
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Scripting
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Remove unnecessary Groovy deprecation logging #23410 (issue: #23401)
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Script: Fix value of
ctx._now
to be current epoch time in milliseconds #23175 (issue: #23169)
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Search
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Honor max concurrent searches in multi-search #23538 (issue: #23527)
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Avoid stack overflow in multi-search #23527 (issue: #23523)
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Replace blocking calls in ExpandCollapseSearchResponseListener by asynchronous requests #23053 (issue: #23048)
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Ensure fixed serialization order of InnerHitBuilder #22820 (issue: #22808)
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Settings
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Fix merge scheduler config settings #23391
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Settings: Fix keystore cli prompting for yes/no to handle console returning null #23320
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Expose
search.highlight.term_vector_multi_value
as a node level setting #22999
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NPE when no setting name passed to elasticsearch-keystore #22609
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Similarities
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Fix similarity upgrade when "default" similarity is overridden #23163
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Stats
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Avoid overflow when computing total FS stats #23641
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Handle long overflow when adding paths' totals #23293 (issue: #23093)
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Fix control group pattern #23219 (issue: #23218)
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Fix total disk bytes returning negative value #23093
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Task Manager
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Fix hanging cancelling task with no children #22796
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Fix broken TaskInfo.toString() #22698 (issue: #22387)
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Core
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Source filtering: only accept array items if the previous include pattern matches #22593 (issue: #22557)
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Internal
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Upgrade to Lucene 6.4.1. #22978