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Elastic Docs ›Elasticsearch Guide [7.15] ›Release notes

Elasticsearch version 7.0.0

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Elasticsearch version 7.0.0

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These release notes include all changes made in the alpha, beta, and RC releases of 7.0.0.

Also see Breaking changes in 7.0.

Known issues

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  • Applying deletes or updates on an index after it has been shrunk may corrupt the index. In order to prevent this issue, it is recommended to stop shrinking read-write indices. For read-only indices, it is recommended to force-merge indices after shrinking, which significantly reduces the likeliness of this corruption in the case that deletes/updates would be applied by mistake. This bug is fixed in Elasticsearch 7.7 and later versions. More details can be found on the corresponding issue.
  • Indices created in 6.x with date and date_nanos fields using formats that are incompatible with java.time patterns will cause parsing errors, incorrect date calculations or wrong search results. https://github.com/elastic/elasticsearch/pull/52555 This is fixed in Elasticsearch 7.7 and later versions.
  • Java based formats (created in 7.x or prefixed with 8) - week based parsing and calculations are using JDK default calendar data provider which is Sunday,1. Sunday is considered first day of a week and it requires only 1 day in a week for the first week of the year. It can be worked around by using locale which is based on ISO8601 rule (Monday,4) - for instance en-GB This issue is fixed in Elasticsearch 7.7 with JDK9+ https://github.com/elastic/elasticsearch/pull/48209

Breaking changes

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Aggregations
  • Remove support for deprecated params._agg/_aggs for scripted metric aggregations #32979 (issues: #29328, #31597)
  • Percentile/Ranks should return null instead of NaN when empty #30460 (issue: #29066)
  • Render sum as zero if count is zero for stats aggregation #27193 (issue: #26893)
Analysis
Audit
  • Logfile auditing settings remove after deprecation #35205
  • Remove index audit output type #37707 (issues: #29881, #37301)
Authentication
  • Security: remove wrapping in put user response #33512 (issue: #32332)
  • Remove bwc logic for token invalidation #36893 (issue: #36727)
Authorization
  • Remove aliases resolution limitations when security is enabled #31952 (issue: #31516)
  • Remove implicit index monitor privilege #37774
Circuit Breakers
  • Lower fielddata circuit breaker’s default limit #27162 (issue: #27130)
CRUD
  • Version conflict exception message enhancement #29432 (issue: #21278)
  • Using ObjectParser in UpdateRequest #29293 (issue: #28740)
  • Remove support for internal versioning for concurrency control #38254 (issue: #1078)
Distributed
  • Remove undocumented action.master.force_local setting #29351
  • Remove tribe node support #28443
  • Forbid negative values for index.unassigned.node_left.delayed_timeout #26828
  • Remove cluster state size #40061 (issues: #39806, #39827, #39951, #40016)
Features/Features
  • Remove Migration Upgrade and Assistance APIs #40075 (issue: #40014)
Features/Indices APIs
  • Indices Exists API should return 404 for empty wildcards #34499
  • Default to one shard #30539
  • Limit the number of nested documents #27405 (issue: #26962)
Features/Ingest
Features/Java Low Level REST Client
  • Drop support for the low-level REST client on JDK 7 #38540 (issue: #29607)
Features/Watcher
  • Remove Watcher Account "unsecure" settings #36736 (issue: #36403)
Features/Stats
  • Remove the suggest metric from stats APIs #29635 (issue: #29589)
  • Align cat thread pool info to thread pool config #29195 (issue: #29123)
  • Align thread pool info to thread pool configuration #29123 (issue: #29113)
Geo
  • Use geohash cell instead of just a corner in geo_bounding_box #30698 (issue: #25154)
Index APIs
Infra/Circuit Breakers
  • Introduce durability of circuit breaking exception #34460 (issue: #31986)
  • Circuit-break based on real memory usage #31767
Infra/Core
  • Default node.name to the hostname #33677
  • Remove bulk fallback for write thread pool #29609
  • CCS: Drop http address from remote cluster info #29568 (issue: #29207)
  • Remove the index thread pool #29556
  • Main response should not have status 503 when okay #29045 (issue: #8902)
  • Automatically prepare indices for splitting #27451
  • Don’t refresh on _flush _force_merge and _upgrade #27000 (issue: #26972)
Infra/Logging
Infra/Packaging
  • Packaging: Remove windows bin files from the tar distribution #30596
  • Package ingest-user-agent as a module #36956
  • Package ingest-geoip as a module #36898
Infra/REST API
  • Remove GET support for clear cache indices #29525
  • Clear Indices Cache API remove deprecated url params #29068
Infra/Scripting
  • Remove support for deprecated StoredScript contexts #31394 (issues: #27612, #28939)
  • Remove getDate methods from ScriptDocValues #30690
  • Drop ScriptDocValues#date and ScriptDocValues#dates in 7.0.0 #30690 (issue: #23008)
Infra/Settings
  • Remove config prompting for secrets and text #27216
Machine Learning
Mapping
  • Match phrase queries against non-indexed fields should throw an exception #31060
  • Remove legacy mapping code. #29224
  • Reject updates to the _default_ mapping. #29165 (issues: #15613, #28248)
  • Remove the update_all_types option. #28288
  • Remove the _default_ mapping. #28248
  • Reject the index_options parameter for numeric fields #26668 (issue: #21475)
  • Update the default for include_type_name to false. #37285
  • Support include_type_name in RestGetIndicesAction #37149
Network
  • Remove http.enabled setting #29601 (issue: #12792)
  • Remove HTTP max content length leniency #29337
  • Remove TLS 1.0 as a default SSL protocol #37512 (issue: #36021)
  • Security: remove SSL settings fallback #36846 (issue: #29797)
Percolator
  • Remove deprecated percolator map_unmapped_fields_as_string setting #28060
Ranking
  • Add minimal sanity checks to custom/scripted similarities. #33564 (issue: #33309)
  • Scroll queries asking for rescore are considered invalid #32918 (issue: #31775)
  • Forbid negative scores in function_score query #35709 (issue: #33309)
  • Forbid negative field boosts in analyzed queries #37930 (issue: #33309)
Scripting
  • Delete deprecated getValues from ScriptDocValues #36183 (issue: #22919)
Search
  • Remove deprecated url parameters _source_include and _source_exclude #35097 (issues: #22792, #33475)
  • Disallow negative query boost #34486 (issue: #33309)
  • Forbid negative weight in Function Score Query #33390 (issue: #31927)
  • In the field capabilities API, remove support for providing fields in the request body. #30185
  • Remove deprecated options for query_string #29203 (issue: #25551)
  • Fix Laplace scorer to multiply by alpha (and not add) #27125
  • Remove _primary and _replica shard preferences #26791 (issue: #26335)
  • Limit the number of expanded fields it query_string and simple_query_string #26541 (issue: #25105)
  • Make purely negative queries return scores of 0. #26015 (issue: #23449)
  • Remove the deprecated _termvector endpoint. #36131 (issues: #36098, #8484)
  • Remove deprecated Graph endpoints #35956
  • Validate metadata on _msearch #35938 (issue: #35869)
  • Make hits.total an object in the search response #35849 (issue: #33028)
  • Remove the distinction between query and filter context in QueryBuilders #35354 (issue: #35293)
  • Throw a parsing exception when boost is set in span_or query (#28390) #34112 (issue: #28390)
  • Track total hits up to 10,000 by default #37466 (issue: #33028)
  • Use mappings to format doc-value fields by default. #30831 (issues: #26948, #29639)
Security
  • Remove heuristics that enable security on trial licenses #38075 (issue: #38009)
Snapshot/Restore
  • Include size of snapshot in snapshot metadata #30890 (issue: #18543)
  • Remove azure deprecated settings #26099 (issue: #23405)
Store
  • Drop elasticsearch-translog for 7.0 #33373 (issues: #31389, #32281)
  • completely drop index.shard.check_on_startup: fix for 7.0 #33194
Suggesters
  • Fix threshold frequency computation in Suggesters #34312 (issue: #34282)
  • Make Geo Context Mapping Parsing More Strict #32821 (issues: #32202, #32412)
  • Remove the ability to index or query context suggestions without context #31007 (issue: #30712)
ZenDiscovery
  • Best-effort cluster formation if unconfigured #36215
  • Remove DiscoveryPlugin#getDiscoveryTypes #38414 (issue: #38410)

Breaking Java changes

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Aggregations
  • Change GeoHashGrid.Bucket#getKey() to return String #31748 (issue: #30320)
Analysis
  • Remove deprecated AnalysisPlugin#requriesAnalysisSettings method #32037 (issue: #32025)
Features/Java High Level REST Client
  • Drop deprecated methods from Retry #33925
  • Cluster health to default to cluster level #31268 (issue: #29331)
  • Remove deprecated API methods #31200 (issue: #31069)
Features/Java Low Level REST Client
Geo
  • Decouple geojson parse logic from ShapeBuilders #27212
Infra/Core
Infra/Transport API
ZenDiscovery
  • Make node field in JoinRequest private #36405

Deprecations

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Aggregations
Analysis
  • Replace parameter unicodeSetFilter with unicode_set_filter #29215 (issue: #22823)
  • Replace delimited_payload_filter by delimited_payload #26625 (issue: #21978)
  • Deprecate Standard Html Strip Analyzer in master #26719 (issue: #4704)
  • Remove nGram and edgeNGram token filter names (#38911) #39070 (issues: #30209, #38911)
Audit
Core
  • Deprecate use of scientific notation in epoch time parsing #36691
  • Add backcompat for joda time formats #36531
Cluster Coordination
Features/Indices APIs
  • Default copy settings to true and deprecate on the REST layer #30598
  • Reject setting index.optimize_auto_generated_id after version 7.0.0 #28895 (issue: #27600)
Features/Ingest
  • Deprecate _type in simulate pipeline requests #37949 (issue: #37731)
Features/Java High Level REST Client
Features/Watcher
  • Deprecate xpack.watcher.history.cleaner_service.enabled #37782 (issue: #32041)
  • deprecate types for watcher #37594 (issue: #35190)
Graph
  • Deprecate types in _graph/explore calls. #40466
Infra/Core
  • Deprecate negative epoch timestamps #36793
  • Deprecate use of scientific notation in epoch time parsing #36691
Infra/Packaging
  • Deprecate fallback to java on PATH #37990
Infra/Scripting
  • Add types deprecation to script contexts #37554
  • Deprecate _type from LeafDocLookup #37491
  • Remove deprecated params.ctx #36848 (issue: #34059)
Infra/Transport API
  • Deprecate the transport client in favour of the high-level REST client #27085
Machine Learning
  • Deprecate X-Pack centric ML endpoints #36315 (issue: #35958)
  • Adding ml_settings entry to HLRC and Docs for deprecation_info #38118
  • Datafeed deprecation checks #38026 (issue: #37932)
  • Remove "8" prefixes from file structure finder timestamp formats #38016
  • Adjust structure finder for Joda to Java time migration #37306
  • Resolve 7.0.0 TODOs in ML code #36842 (issue: #29963)
Mapping
  • Deprecate type exists requests. #34663
  • Deprecate types in index API #36575 (issues: #35190, #35790)
  • Deprecate uses of _type as a field name in queries #36503 (issue: #35190)
  • Deprecate types in update_by_query and delete_by_query #36365 (issue: #35190)
  • For msearch templates, make sure to use the right name for deprecation logging. #36344
  • Deprecate types in termvector and mtermvector requests. #36182
  • Deprecate types in update requests. #36181
  • Deprecate types in document delete requests. #36087
  • Deprecate types in get, exists, and multi get. #35930
  • Deprecate types in search and multi search templates. #35669
  • Deprecate types in explain requests. #35611
  • Deprecate types in validate query requests. #35575
  • Deprecate types in count and msearch. #35421 (issue: #34041)
  • Deprecate types in rollover index API #38039 (issue: #35190)
  • Deprecate types in get field mapping API #37667 (issue: #35190)
  • Deprecate types in the put mapping API. #37280 (issues: #29453, #37285)
  • Support include_type_name in the field mapping and index template APIs. #37210
  • Deprecate types in create index requests. #37134 (issues: #29453, #37285)
  • Deprecate use of the _type field in aggregations. #37131 (issue: #36802)
  • Deprecate reference to _type in lookup queries #37016 (issue: #35190)
  • Deprecate the document create endpoint. #36863
  • Deprecate types in index API #36575 (issues: #35190, #35790)
  • Deprecate types in update APIs #36225
Migration
  • Deprecate X-Pack centric Migration endpoints #35976 (issue: #35958)
Monitoring
  • Deprecate /_xpack/monitoring/* in favor of /_monitoring/* #36130 (issue: #35958)
Rollup
  • Re-deprecate xpack rollup endpoints #36451 (issue: #36044)
  • Deprecate X-Pack centric rollup endpoints #35962 (issue: #35958)
Scripting
  • Adds deprecation logging to ScriptDocValues#getValues. #34279 (issue: #22919)
  • Conditionally use java time api in scripting #31441
Search
  • Deprecate filtering on _type. #29468 (issue: #15613)
  • Remove X-Pack centric graph endpoints #36010 (issue: #35958)
  • Deprecate use of type in reindex request body #36823
  • Add typless endpoints for get_source and exist_source #36426
Security
  • Deprecate X-Pack centric license endpoints #35959 (issue: #35958)
  • Deprecate /_xpack/security/* in favor of /_security/* #36293 (issue: #35958)
SQL
  • Deprecate X-Pack SQL translate endpoint #36030
  • Deprecate X-Pack centric SQL endpoints #35964 (issue: #35958)
Watcher
  • Deprecate X-Pack centric watcher endpoints #36218 (issue: #35958)

New features

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Allocation
Analysis
  • Relax TermVectors API to work with textual fields other than TextFieldType #31915 (issue: #31902)
  • Add support for inlined user dictionary in Nori #36123 (issue: #35842)
  • Add a prebuilt ICU Analyzer #34958 (issue: #34285)
Authentication
  • Add support for API keys to access Elasticsearch #38291 (issue: #34383)
  • OIDC realm authentication flows #37787
  • OIDC Realm JWT+JWS related functionality #37272 (issues: #35339, #37009)
  • OpenID Connect Realm base functionality #37009 (issue: #35339)
Authorization
CCR
  • Generalize search.remote settings to cluster.remote #33413
  • Add ccr follow info api #37408 (issue: #37127)
Distributed
Features/ILM
Features/Ingest
  • Revert "Introduce a Hashing Processor (#31087)" #32178
  • Add ingest-attachment support for per document indexed_chars limit #28977 (issue: #28942)
Features/Java High Level REST Client
  • GraphClient for the high level REST client and associated tests #32366
Features/Monitoring
  • Collect only display_name (for now) #35265 (issue: #8445)
Geo
  • Integrate Lucene’s LatLonShape (BKD Backed GeoShapes) as default geo_shape indexing approach #36751 (issue: #35320)
  • Integrate Lucene’s LatLonShape (BKD Backed GeoShapes) as default geo_shape indexing approach #35320 (issue: #32039)
  • geotile_grid implementation #37842 (issue: #30240)
  • Fork Lucene’s LatLonShape Classes to local lucene package #36794
  • Integrate Lucene’s LatLonShape (BKD Backed GeoShapes) as default geo_shape indexing approach #36751 (issue: #35320)
  • Integrate Lucene’s LatLonShape (BKD Backed GeoShapes) as default geo_shape indexing approach #35320 (issue: #32039)
Infra/Core
  • Skip shard refreshes if shard is search idle #27500
Infra/Logging
  • Logging: Unify log rotation for index/search slow log #27298
Infra/Plugins
Infra/REST API
Java High Level REST Client
Java Low Level REST Client
  • Make warning behavior pluggable per request #36345
  • Add PreferHasAttributeNodeSelector #36005
Machine Learning
  • Filter undefined job groups from update job calendar actions #30757
  • Add delayed datacheck to the datafeed job runner #35387 (issue: #35131)
  • Adds set_upgrade_mode API endpoint #37837
Mapping
  • Add a feature_vector field. #31102 (issue: #27552)
  • Expose Lucene’s FeatureField. #30618
  • Make typeless APIs usable with indices whose type name is different from _doc #35790 (issue: #35190)
  • Give precedence to index creation when mixing typed templates with typeless index creation and vice-versa. #37871 (issue: #37773)
  • Add nanosecond field mapper #37755 (issues: #27330, #32601)
Ranking
Recovery
  • Allow to trim all ops above a certain seq# with a term lower than X, … #31211 (issue: #10708)
SQL
  • Add basic support for ST_AsWKT geo function #34205
  • Add support for SYS GEOMETRY_COLUMNS #30496 (issue: #29872)
  • Introduce HISTOGRAM grouping function #36510 (issue: #36509)
  • DATABASE() and USER() system functions #35946 (issue: #35863)
  • Introduce INTERVAL support #35521 (issue: #29990)
  • Allow sorting of groups by aggregates #38042 (issue: #35118)
  • Implement FIRST/LAST aggregate functions #37936 (issue: #35639)
  • Introduce SQL DATE data type #37693 (issue: #37340)
Search
  • Add “took” timing info to response for _msearch/template API #30961 (issue: #30957)
  • Add allow_partial_search_results flag to search requests with default setting true #28440 (issue: #27435)
  • Enable adaptive replica selection by default #26522 (issue: #24915)
  • Add intervals query #36135 (issues: #29636, #32406)
  • Added soft limit to open scroll contexts #25244 #36009 (issue: #25244)
  • Introduce ability to minimize round-trips in CCS #37828 (issues: #32125, #37566)
  • Add script filter to intervals #36776
  • Add the ability to set the number of hits to track accurately #36357 (issue: #33028)
  • Add a maximum search request size. #26423
  • Make IntervalQuery available via the Query DSL #36135 (issue: #29636)
Security
  • Switch internal security index to ".security-7" #39337 (issue: #39284)
Suggesters
  • Serialize suggestion responses as named writeables #30284 (issue: #26585)

Enhancements

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Aggregations
  • Uses MergingDigest instead of AVLDigest in percentiles agg #28702 (issue: #19528)
  • Added keyed response to pipeline percentile aggregations 22302 #36392 (issue: #22302)
  • Enforce max_buckets limit only in the final reduction phase #36152 (issues: #32125, #35921)
  • Histogram aggs: add empty buckets only in the final reduce step #35921
  • Handles exists query in composite aggs #35758
  • Added parent validation for auto date histogram #35670
  • Add Composite to AggregationBuilders #38207 (issue: #38020)
  • Allow nested fields in the composite aggregation #37178 (issue: #28611)
  • Remove single shard optimization when suggesting shard_size #37041 (issue: #32125)
  • Use List instead of priority queue for stable sorting in bucket sort aggregator #36748 (issue: #36322)
  • Keys are compared in BucketSortPipelineAggregation so making key type… #36407
Allocation
  • Fail start on obsolete indices documentation #37786 (issue: #27073)
  • Fail start on invalid index metadata #37748 (issue: #27073)
  • Fail start of non-data node if node has data #37347 (issue: #27073)
Analysis
  • Allow word_delimiter_graph_filter to not adjust internal offsets #36699 (issues: #33710, #34741)
  • Ensure TokenFilters only produce single tokens when parsing synonyms #34331 (issue: #34298)
  • Allow word_delimiter_graph_filter to not adjust internal offsets #36699 (issues: #33710, #34741)
Audit
  • Add "request.id" to file audit logs #35536
  • Security Audit includes HTTP method for requests #37322 (issue: #29765)
  • Add X-Forwarded-For to the logfile audit #36427
Authentication
  • Invalidate Token API enhancements - HLRC #36362 (issue: #35388)
  • Add DEBUG/TRACE logs for LDAP bind #36028
  • Add Tests for findSamlRealm #35905
  • Add realm information for Authenticate API #35648
  • Formal support for "password_hash" in Put User #35242 (issue: #34729)
  • Propagate auth result to listeners #36900 (issue: #30794)
  • Reorder realms based on last success #36878
  • Improve error message for 6.x style realm settings #36876 (issues: #30241, #36026)
  • Change missing authn message to not mention tokens #36750
  • Invalidate Token API enhancements - HLRC #36362 (issue: #35388)
  • Enhance Invalidate Token API #35388 (issues: #34556, #35115)
Authorization
  • Improve exact index matching performance #36017
  • manage_token privilege for kibana_system #35751
  • Grant .tasks access to kibana_system role #35573
  • Add apm_user reserved role #38206
  • Permission for restricted indices #37577 (issue: #34454)
  • Remove kibana_user and kibana_dashboard_only_user index privileges #37441
  • Create snapshot role #35820 (issue: #34454)
Build
  • Sounds like typo in exception message #35458
  • Allow set section in setup section of REST tests #34678
CCR
  • Add time since last auto follow fetch to auto follow stats #36542 (issues: #33007, #35895)
  • Clean followed leader index UUIDs in auto follow metadata #36408 (issue: #33007)
  • Change AutofollowCoordinator to use wait_for_metadata_version #36264 (issues: #33007, #35895)
  • Refactor AutoFollowCoordinator to track leader indices per remote cluster #36031 (issues: #33007, #35895)
  • Concurrent file chunk fetching for CCR restore #38495
  • Tighten mapping syncing in ccr remote restore #38071 (issues: #36879, #37887)
  • Do not allow put mapping on follower #37675 (issue: #30086)
  • Added ccr to xpack usage infrastructure #37256 (issue: #37221)
  • FollowingEngine should fail with 403 if operation has no seqno assigned #37213
  • Added auto_follow_exception.timestamp field to auto follow stats #36947
  • Add time since last auto follow fetch to auto follow stats #36542 (issues: #33007, #35895)
  • Reduce retention lease sync intervals #40302
  • Renew retention leases while following #39335 (issues: #37165, #38718)
  • Reduce refresh when lookup term in FollowingEngine #39184
  • Integrate retention leases to recovery from remote #38829 (issue: #37165)
  • Enable removal of retention leases #38751 (issue: #37165)
  • Introduce forget follower API #39718 (issue: #37165)
Client
  • Fixed required fields and paths list #39358
Cluster Coordination
  • Remove timeout task after completing cluster state publication #40411
  • Use default discovery implementation for single-node discovery #40036
  • Do not log unsuccessful join attempt each time #39756
Core
  • Override the JVM DNS cache policy #36570
  • Replace usages of AtomicBoolean based block of code by the RunOnce class #35553 (issue: #35489)
  • Added wait_for_metadata_version parameter to cluster state api. #35535
  • Extract RunOnce into a dedicated class #35489
  • Introduce elasticsearch-core jar #28191 (issue: #27933)
  • Rename core module to server #28180 (issue: #27933)
CRUD
  • Rename seq# powered optimistic concurrency control parameters to ifSeqNo/ifPrimaryTerm #36757 (issues: #10708, #36148)
  • Expose Sequence Number based Optimistic Concurrency Control in the rest layer #36721 (issues: #10708, #36148)
  • Add doc’s sequence number + primary term to GetResult and use it for updates #36680 (issues: #10708, #36148)
  • Add seq no powered optimistic locking support to the index and delete transport actions #36619 (issues: #10708, #36148)
  • Add Seq# based optimistic concurrency control to UpdateRequest #37872 (issues: #10708, #36148)
  • Introduce ssl settings to reindex from remote #37527 (issues: #29755, #37287)
  • Use Sequence number powered OCC for processing updates #37308 (issues: #10708, #36148)
  • Document Seq No powered optimistic concurrency control #37284 (issues: #10708, #36148)
  • Enable IPv6 URIs in reindex from remote #36874
  • Rename seq# powered optimistic concurrency control parameters to ifSeqNo/ifPrimaryTerm #36757 (issues: #10708, #36148)
  • Expose Sequence Number based Optimistic Concurrency Control in the rest layer #36721 (issues: #10708, #36148)
  • Add doc’s sequence number + primary term to GetResult and use it for updates #36680 (issues: #10708, #36148)
  • Add seq no powered optimistic locking support to the index and delete transport actions #36619 (issues: #10708, #36148)
  • Set acking timeout to 0 on dynamic mapping update #31140 (issues: #30672, #30844)
Discovery-Plugins
  • Adds connect and read timeouts to discovery-gce #28193 (issue: #24313)
Distributed
  • [Close Index API] Mark shard copy as stale if needed during shard verification #36755
  • [Close Index API] Refactor MetadataIndexStateService #36354 (issue: #36249)
  • [Close Index API] Add TransportShardCloseAction for pre-closing verifications #36249
  • TransportResyncReplicationAction should not honour blocks #35795 (issues: #35332, #35597)
  • Expose all permits acquisition in IndexShard and TransportReplicationAction #35540 (issue: #33888)
  • [RCI] Check blocks while having index shard permit in TransportReplicationAction #35332 (issue: #33888)
  • Recover retention leases during peer recovery #38435 (issue: #37165)
  • Lift retention lease expiration to index shard #38380 (issues: #37165, #37963, #38070)
  • Introduce retention lease background sync #38262 (issue: #37165)
  • Allow shards of closed indices to be replicated as regular shards #38024 (issue: #33888)
  • Expose retention leases in shard stats #37991 (issue: #37165)
  • Introduce retention leases versioning #37951 (issue: #37165)
  • Soft-deletes policy should always fetch latest leases #37940 (issues: #37165, #37375)
  • Sync retention leases on expiration #37902 (issue: #37165)
  • Ignore shard started requests when primary term does not match #37899 (issue: #33888)
  • Move update and delete by query to use seq# for optimistic concurrency control #37857 (issues: #10708, #36148, #37639)
  • Introduce retention lease serialization #37447 (issues: #37165, #37398)
  • Add run under primary permit method #37440 (issue: #37398)
  • Introduce retention lease syncing #37398 (issue: #37165)
  • Introduce retention lease persistence #37375 (issue: #37165)
  • Add validation for retention lease construction #37312 (issue: #37165)
  • Introduce retention lease expiration #37195 (issue: #37165)
  • Introduce shard history retention leases #37167 (issue: #37165)
  • [Close Index API] Add unique UUID to ClusterBlock #36775
  • [Close Index API] Mark shard copy as stale if needed during shard verification #36755
  • [Close Index API] Propagate tasks ids between Freeze, Close and Verify Shard actions #36630
  • Always initialize the global checkpoint #34381
  • Introduce retention lease actions #38756 (issue: #37165)
  • Add dedicated retention lease exceptions #38754 (issue: #37165)
  • Copy retention leases when trim unsafe commits #37995 (issue: #37165)
  • Allow retention lease operations under blocks #39089 (issues: #34648, #37165)
  • Remove retention leases when unfollowing #39088 (issues: #34648, #37165)
  • Introduce retention lease state file #39004 (issues: #37165, #38588, #39032)
  • Enable soft-deletes by default for 7.0+ indices #38929 (issue: #36141)
Engine
  • Remove versionType from translog #31945
  • Do retry if primary fails on AsyncAfterWriteAction #31857 (issues: #31716, #31755)
  • handle AsyncAfterWriteAction exception before listener is registered #31755 (issue: #31716)
  • Use IndexWriter#flushNextBuffer to free memory #27753
  • Remove pre 6.0.0 support from InternalEngine #27720
  • Add sequence numbers based optimistic concurrency control support to Engine #36467 (issues: #10708, #36148)
  • Require soft-deletes when access changes snapshot #36446
  • Use delCount of SegmentInfos to calculate numDocs #36323
  • Always configure soft-deletes field of IndexWriterConfig #36196 (issue: #36141)
  • Enable soft-deletes by default on 7.0.0 or later #36141
  • Always return false from refreshNeeded on ReadOnlyEngine #35837 (issue: #35785)
  • Add a _freeze / _unfreeze API #35592 (issue: #34352)
  • [RCI] Add IndexShardOperationPermits.asyncBlockOperations(ActionListener<Releasable>) #34902 (issue: #33888)
  • Specialize pre-closing checks for engine implementations #38702
  • Ensure that max seq # is equal to the global checkpoint when creating ReadOnlyEngines #37426
  • Enable Bulk-Merge if all source remains #37269
  • Rename setting to enable mmap #37070 (issue: #36668)
  • Add hybridfs store type #36668
  • Introduce time-based retention policy for soft-deletes #34943 (issue: #34908)
  • Handle AsyncAfterWriteAction failure on primary in the same way as failures on replicas #31969 (issues: #31716, #31755)
  • Explicitly advance max_seq_no before indexing #39473 (issue: #38879)
  • Also mmap cfs files for hybridfs #38940 (issue: #36668)
Features/CAT APIs
  • Expose search.throttled on _cat/indices #37073 (issue: #34352)
Features/Features
  • Run Node deprecation checks locally (#38065) #38250 (issue: #38065)
Features/ILM
  • Ensure ILM policies run safely on leader indices #38140 (issue: #34648)
  • Skip Shrink when numberOfShards not changed #37953 (issue: #33275)
  • Inject Unfollow before Rollover and Shrink #37625 (issue: #34648)
  • Add set_priority action to ILM #37397 (issue: #36905)
  • Add Freeze Action #36910 (issue: #34630)
Features/Indices APIs
  • Add cluster-wide shard limit #32856 (issue: #20705)
  • Remove RestGetAllAliasesAction #31308 (issue: #31129)
  • Add rollover-creation-date setting to rolled over index #31144 (issue: #30887)
  • add is-write-index flag to aliases #30942
  • Make index and bulk APIs work without types. #29479
  • Simplify deprecation issue levels #36326
  • New mapping signature and mapping string source fixed. #37401
Features/Ingest
  • Add ignore_missing property to foreach filter (#22147) #31578 (issue: #22147)
  • Compile mustache template only if field includes {{' #37207 (issue: #37120)
  • Move ingest-geoip default databases out of config #36949 (issue: #36898)
  • Make the ingest-geoip databases even lazier to load #36679
  • Updates the grok patterns to be consistent with the logstash #27181
Features/Java High Level REST Client
  • HLRC API for _termvectors #32610 (issue: #27205)
  • Fix strict setting exception handling #37247 (issue: #37090)
  • Use nonblocking entity for requests #32249
Features/Monitoring
  • Make Exporters Async #35765 (issue: #35743)
  • Adding mapping for hostname field #37288
  • Remove types from internal monitoring templates and bump to api 7 #39888 (issue: #38637)
Features/Stats
  • Stats to record how often the ClusterState diff mechanism is used successfully #26973
  • Add JVM dns cache expiration config to JvmInfo #36372
Features/Watcher
  • Validate email adresses when storing a watch #34042 (issue: #33980)
  • Move watcher to use seq# and primary term for concurrency control #37977 (issues: #10708, #37872)
  • Use ILM for Watcher history deletion #37443 (issue: #32041)
  • Add whitelist to HttpClient #36817 (issue: #29937)
  • Remove the index type from internal watcher indexes #39761 (issue: #38637)
Geo
  • Adds a name of the field to geopoint parsing errors #36529 (issue: #15965)
  • Add support to ShapeBuilders for building Lucene geometry #35707 (issue: #35320)
  • Add ST_WktToSQL function #35416 (issue: #29872)
Index APIs
Infra/Circuit Breakers
  • Have circuit breaker succeed on unknown mem usage #33125 (issue: #31767)
  • Account for XContent overhead in in-flight breaker #31613
  • Script Stats: Add compilation limit counter to stats #26387
Infra/Core
  • Add RunOnce utility class that executes a Runnable exactly once #35484
  • Improved IndexNotFoundException’s default error message #34649 (issue: #34628)
  • fix a few versionAdded values in ElasticsearchExceptions #37877
  • Add simple method to write collection of writeables #37448 (issue: #37398)
  • Date/Time parsing: Use java time API instead of exception handling #37222
  • [API] spelling: interruptible #37049 (issue: #37035)
  • Enhancements to IndicesQueryCache. #39099 (issue: #37117)
  • Change zone formatting for all printers #39568 (issue: #38471)
Infra/Logging
Infra/Packaging
  • Choose JVM options ergonomically #30684
  • Add OS/architecture classifier to distributions #37881
  • Change file descriptor limit to 65535 #37537 (issue: #35839)
  • Exit batch files explictly using ERRORLEVEL #29583 (issue: #29582)
  • Add no-jdk distributions #39882
  • Allow AVX-512 on JDK 11+ #40828 (issue: #32138)
Infra/REST API
  • Remove hand-coded XContent duplicate checks #34588 (issues: #22073, #22225, #22253)
  • Add the include_type_name option to the search and document APIs. #29506 (issue: #15613)
  • Validate op_type for _create #27483
Infra/Scripting
  • Tests: Add support for custom contexts to mock scripts #34100
  • Reflect factory signatures in painless classloader #34088
  • Handle missing values in painless #32207 (issue: #29286)
  • Add getZone to JodaCompatibleZonedDateTime #37084
  • [Painless] Add boxed type to boxed type casts for method/return #36571
Infra/Packaging
  • Use bundled JDK in Docker images #40238
  • Upgrade bundled JDK and Docker images to JDK 12 #40229
  • Bundle java in distributions #38013 (issue: #31845)
Infra/Settings
  • Settings: Add keystore creation to add commands #26126
  • Separate out validation of groups of settings #34184
  • Provide a clearer error message on keystore add #39327 (issue: #39324)
Infra/Transport API
  • Change BWC version for VerifyRepositoryResponse #30796 (issue: #30762)
Ingest
  • Grok fix duplicate patterns JAVACLASS and JAVAFILE #35886
  • Implement Drop Processor #32278 (issue: #23726)
Java High Level REST Client
Java Low Level REST Client
  • On retry timeout add root exception #25576
License
  • Require acknowledgement to start_trial license #30135 (issue: #30134)
  • Handle malformed license signatures #37137 (issue: #35340)
Machine Learning
  • Create the ML annotations index #36731 (issues: #26034, #33376)
  • Split in batches and migrate all jobs and datafeeds #36716 (issue: #32905)
  • Add cluster setting to enable/disable config migration #36700 (issue: #32905)
  • Add audits when deprecation warnings occur with datafeed start #36233
  • Add lazy parsing for DatafeedConfig:Aggs,Query #36117
  • Add support for lazy nodes (#29991) #34538 (issue: #29991)
  • Move ML Optimistic Concurrency Control to Seq No #38278 (issues: #10708, #36148)
  • Add explanation so far to file structure finder exceptions #38191 (issue: #29821)
  • Add reason field in JobTaskState #38029 (issue: #34431)
  • Add _meta information to all ML indices #37964
  • Add upgrade mode docs, hlrc, and fix bug #37942
  • Tighten up use of aliases rather than concrete indices #37874
  • Add support for single bucket aggs in Datafeeds #37544 (issue: #36838)
  • Create the ML annotations index #36731 (issues: #26034, #33376)
  • Merge the Jindex master feature branch #36702 (issue: #32905)
  • Add cluster setting to enable/disable config migration #36700 (issue: #32905)
  • Allow stop unassigned datafeed and relax unset upgrade mode wait #39034
Mapping
  • Log document id when MapperParsingException occurs #37800 (issue: #37658)
  • [API] spelling: unknown #37056 (issue: #37035)
  • Make SourceToParse immutable #36971
  • Use index-prefix fields for terms of length min_chars - 1 #36703
  • Introduce a parameter suppress_types_warnings. #38923
Network
  • Add cors support to NioHttpServerTransport #30827 (issue: #28898)
  • Reintroduce mandatory http pipelining support #30820
  • Make http pipelining support mandatory #30695 (issues: #28898, #29500)
  • Add nio http server transport #29587 (issue: #28898)
  • Add class for serializing message to bytes #29384 (issue: #28898)
  • Selectors operate on channel contexts #28468 (issue: #27260)
  • Unify nio read / write channel contexts #28160 (issue: #27260)
  • Create nio-transport plugin for NioTransport #27949 (issue: #27260)
  • Add elasticsearch-nio jar for base nio classes #27801 (issue: #27802)
  • Unify transport settings naming #36623
  • Add sni name to SSLEngine in netty transport #33144 (issue: #32517)
  • Add cors support to NioHttpServerTransport #30827 (issue: #28898)
  • Reintroduce mandatory http pipelining support #30820
  • Make http pipelining support mandatory #30695 (issues: #28898, #29500)
  • Add nio http server transport #29587 (issue: #28898)
  • Selectors operate on channel contexts #28468 (issue: #27260)
  • Unify nio read / write channel contexts #28160 (issue: #27260)
  • Create nio-transport plugin for NioTransport #27949 (issue: #27260)
  • Add elasticsearch-nio jar for base nio classes #27801 (issue: #27802)
  • Add NioGroup for use in different transports #27737 (issue: #27260)
  • Add read timeouts to http module #27713
  • Implement byte array reusage in NioTransport #27696 (issue: #27563)
  • Introduce resizable inbound byte buffer #27551 (issue: #27563)
  • Decouple nio constructs from the tcp transport #27484 (issue: #27260)
  • Remove manual tracking of registered channels #27445 (issue: #27260)
  • Remove tcp profile from low level nio channel #27441 (issue: #27260)
  • Decouple ChannelFactory from Tcp classes #27286 (issue: #27260)
  • Enable TLSv1.3 by default for JDKs with support #38103 (issue: #32276)
Packaging
  • Introduce Docker images build #36246
  • Move creation of temporary directory to Java #36002 (issue: #31003)
Percolator
  • Make the type parameter optional when percolating existing documents. #39987 (issue: #39963)
  • Add support for selecting percolator query candidate matches containing geo_point based queries #26040
Plugins
  • Plugin install: don’t print download progress in batch mode #36361
Ranking
Recovery
  • SyncedFlushService.getShardRoutingTable() should use metadata to check for index existence #37691 (issue: #33888)
  • Make prepare engine step of recovery source non-blocking #37573 (issue: #37174)
  • Make recovery source send operations non-blocking #37503 (issue: #37458)
  • Prepare to make send translog of recovery non-blocking #37458 (issue: #37291)
  • Make finalize step of recovery source non-blocking #37388 (issue: #37291)
  • Make recovery source partially non-blocking #37291 (issue: #36195)
  • Do not mutate RecoveryResponse #37204 (issue: #37174)
  • Don’t block on peer recovery on the target side #37076 (issue: #36195)
  • Reduce recovery time with compress or secure transport #36981 (issue: #33844)
  • Translog corruption marker #33415 (issue: #31389)
  • Do not wait for advancement of checkpoint in recovery #39006 (issues: #38949, #39000)
Rollup
  • Add non-X-Pack centric rollup endpoints #36383 (issues: #35958, #35962)
  • Add more diagnostic stats to job #35471
  • Add wait_for_completion option to StopRollupJob API #34811 (issue: #34574)
  • Replace the TreeMap in the composite aggregation #36675
Recovery
  • Exposed engine must include all operations below global checkpoint during rollback #36159 (issue: #32867)
Scripting
  • Update joda compat methods to use compat class #36654
  • [Painless] Add boxed type to boxed type casts for method/return #36571
  • [Painless] Add def to boxed type casts #36506
Settings
Search
  • Make limit on number of expanded fields configurable #35284 (issues: #26541, #34778)
  • Search: Simply SingleFieldsVisitor #34052
  • Don’t count hits via the collector if the hit count can be computed from index stats. #33701
  • Limit the number of concurrent requests per node #31206 (issue: #31192)
  • Default max concurrent search req. numNodes * 5 #31171 (issues: #30783, #30994)
  • Change ScriptException status to 400 (bad request) #30861 (issue: #12315)
  • Change default value to true for transpositions parameter of fuzzy query #26901
  • Introducing "took" time (in ms) for _msearch #23767 (issue: #23131)
  • Add copy constructor to SearchRequest #36641 (issue: #32125)
  • Add raw sort values to SearchSortValues transport serialization #36617 (issue: #32125)
  • Add sort and collapse info to SearchHits transport serialization #36555 (issue: #32125)
  • Add default methods to DocValueFormat #36480
  • Respect indices options on _msearch #35887
  • Allow efficient can_match phases on frozen indices #35431 (issues: #34352, #34357)
  • Add a new query type - ScriptScoreQuery #34533 (issues: #23850, #27588, #30303)
  • Tie break on cluster alias when merging shard search failures #38715 (issue: #38672)
  • Add finalReduce flag to SearchRequest #38104 (issues: #37000, #37838)
  • Streamline skip_unavailable handling #37672 (issue: #32125)
  • Expose sequence number and primary terms in search responses #37639
  • Add support for merging multiple search responses into one #37566 (issue: #32125)
  • Allow field types to optimize phrase prefix queries #37436 (issue: #31921)
  • Add support for providing absolute start time to SearchRequest #37142 (issue: #32125)
  • Ensure that local cluster alias is never treated as remote #37121 (issues: #32125, #36997)
  • [API] spelling: cacheable #37047 (issue: #37035)
  • Add ability to suggest shard_size on coord node rewrite #37017 (issues: #32125, #36997, #37000)
  • Skip final reduction if SearchRequest holds a cluster alias #37000 (issues: #32125, #36997)
  • Add support for local cluster alias to SearchRequest #36997 (issue: #32125)
  • Use SearchRequest copy constructor in ExpandSearchPhase #36772 (issue: #36641)
  • Add raw sort values to SearchSortValues transport serialization #36617 (issue: #32125)
  • Avoid BytesRef’s copying in ScriptDocValues’s Strings #29581 (issue: #29567)
Security
  • Make credentials mandatory when launching xpack/migrate #36197 (issues: #29847, #33972)
  • Move CAS operations in TokenService to sequence numbers #38311 (issues: #10708, #37872)
  • Cleanup construction of interceptors #38294
  • Add passphrase support to elasticsearch-keystore #37472 (issue: #32691)
  • Types removal security index template #39705 (issue: #38637)
  • Types removal security index template #39542 (issue: #38637)
Snapshot/Restore
  • #31608 Add S3 Setting to Force Path Type Access #34721 (issue: #31608)
  • Allow Parallel Restore Operations #36397
  • Repo Creation out of ClusterStateTask #36157 (issue: #9488)
  • Add read-only repository verification #35731 (issue: #35703)
  • RestoreService should update primary terms when restoring shards of existing indices #38177 (issue: #33888)
  • Allow open indices to be restored #37733
  • Create specific exception for when snapshots are in progress #37550 (issue: #37541)
  • Make Atomic Blob Writes Mandatory #37168 (issues: #37011, #37066)
  • Speed up HDFS Repository Writes #37069
  • Implement Atomic Blob Writes for HDFS Repository #37066 (issue: #37011)
  • [API] spelling: repositories #37053 (issue: #37035)
  • Use CancellableThreads to Abort #35901 (issue: #21759)
  • S3 client encryption #30513 (issues: #11128, #16843)
  • Mark Deleted Snapshot Directories with Tombstones #40228 (issue: #39852)
Stats
  • Handle OS pretty name on old OS without OS release #35453 (issue: #35440)
Store
  • Add RemoveCorruptedShardDataCommand #32281 (issues: #31389, #32279)
  • Add option to force load term dict into memory #39741
SQL
  • Introduce support for NULL values #34573 (issue: #32079)
  • Extend the ODBC metric by differentiating between 32 and 64bit platforms #36753 (issue: #36740)
  • Fix wrong appliance of StackOverflow limit for IN #36724 (issue: #36592)
  • Introduce NOW/CURRENT_TIMESTAMP function #36562 (issue: #36534)
  • Move requests' parameters to requests JSON body #36149 (issue: #35992)
  • Make INTERVAL millis optional #36043 (issue: #36032)
  • Implement data type verification for conditionals #35916 (issue: #35907)
  • Implement GREATEST and LEAST functions #35879 (issue: #35878)
  • Implement null safe equality operator <=> #35873 (issue: #35871)
  • SYS COLUMNS returns ODBC specific schema #35870 (issue: #35376)
  • Polish grammar for intervals #35853
  • Add filtering to SYS TYPES #35852 (issue: #35342)
  • Implement NULLIF(expr1, expr2) function #35826 (issue: #35818)
  • Lock down JDBC driver #35798 (issue: #35437)
  • Implement NVL(expr1, expr2) #35794 (issue: #35782)
  • Implement ISNULL(expr1, expr2) #35793 (issue: #35781)
  • Implement IFNULL variant of COALESCE #35762 (issue: #35749)
  • XPack FeatureSet functionality #35725 (issue: #34821)
  • Perform lazy evaluation of mismatched mappings #35676 (issues: #35659, #35675)
  • Improve validation of unsupported fields #35675 (issue: #35673)
  • Move internals from Joda to java.time #35649 (issue: #35633)
  • Allow look-ahead resolution of aliases for WHERE clause #38450 (issue: #29983)
  • Implement CURRENT_DATE #38175 (issue: #38160)
  • Generate relevant error message when grouping functions are not used in GROUP BY #38017 (issue: #37952)
  • Skip the nested and object field types in case of an ODBC request #37948 (issue: #37801)
  • Add protocol tests and remove jdbc_type from drivers response #37516 (issues: #36635, #36882)
  • Remove slightly used meta commands #37506 (issue: #37409)
  • Describe aliases as views #37496 (issue: #37422)
  • Make FULL non-reserved keyword in the grammar #37377 (issue: #37376)
  • Use declared source for error messages #37161
  • Improve error message when unable to translate to ES query DSL #37129 (issue: #37040)
  • [API] spelling: subtract #37055 (issue: #37035)
  • [API] spelling: similar #37054 (issue: #37035)
  • [API] spelling: input #37048 (issue: #37035)
  • Enhance message for PERCENTILE[_RANK] with field as 2nd arg #36933 (issue: #36903)
  • Preserve original source for each expression #36912 (issue: #36894)
  • Extend the ODBC metric by differentiating between 32 and 64bit platforms #36753 (issue: #36740)
  • Fix wrong appliance of StackOverflow limit for IN #36724 (issue: #36592)
  • Enhance checks for inexact fields #39427 (issue: #38501)
  • Change the default precision for CURRENT_TIMESTAMP function #39391 (issue: #39288)
  • Add "fuzziness" option to QUERY and MATCH function predicates #40529 (issue: #40495)
  • Add "validate.properties" property to JDBC’s allowed list of settings #39050 (issue: #38068)
Suggesters
  • Remove unused empty constructors from suggestions classes #37295
  • [API] spelling: likelihood #37052 (issue: #37035)
Task Management
  • Periodically try to reassign unassigned persistent tasks #36069 (issue: #35792)
  • Only require task permissions #35667 (issue: #35573)
  • Retry if task can’t be written #35054 (issue: #33764)
ZenDiscovery
  • Introduce vote withdrawal #35446
  • Add basic Zen1 transport-level BWC #35443
  • Add diff-based publishing #35290
  • Introduce auto_shrink_voting_configuration setting #35217
  • Introduce transport API for cluster bootstrapping #34961
  • Reconfigure cluster as its membership changes #34592 (issue: #33924)
  • Fail fast on disconnects #34503
  • Add storage-layer disruptions to CoordinatorTests #34347
  • Add low-level bootstrap implementation #34345
  • Gather votes from all nodes #34335
  • Add Cluster State Applier #34257
  • Add safety phase to CoordinatorTests #34241
  • Integrate FollowerChecker with Coordinator #34075
  • Integrate LeaderChecker with Coordinator #34049
  • Trigger join when active master detected #34008
  • Update PeerFinder term on term bump #33992
  • Calculate optimal cluster configuration #33924
  • Introduce FollowersChecker #33917
  • Integrate publication pipeline into Coordinator #33771
  • Add DisruptableMockTransport #33713
  • Implement basic cluster formation #33668
  • Introduce LeaderChecker #33024
  • Add leader-side join handling logic #33013
  • Add PeerFinder#onFoundPeersUpdated #32939
  • Introduce PreVoteCollector #32847
  • Introduce ElectionScheduler #32846
  • Introduce ElectionScheduler #32709
  • Add HandshakingTransportAddressConnector #32643 (issue: #32246)
  • Add UnicastConfiguredHostsResolver #32642 (issue: #32246)
  • Cluster state publication pipeline #32584 (issue: #32006)
  • Introduce gossip-like discovery of master nodes #32246
  • Add core coordination algorithm for cluster state publishing #32171 (issue: #32006)
  • Add term and config to cluster state #32100 (issue: #32006)
  • Add discovery types to cluster stats #36442
  • Introduce zen2 discovery type #36298
  • Persist cluster states the old way on non-master-eligible nodes #36247 (issue: #3)
  • Storage layer WriteStateException propagation #36052
  • Implement Tombstone REST APIs #36007
  • Update default for USE_ZEN2 to true #35998
  • Add warning if cluster fails to form fast enough #35993
  • Allow Setting a List of Bootstrap Nodes to Wait for #35847
  • VotingTombstone class #35832
  • PersistedState interface implementation #35819
  • Support rolling upgrades from Zen1 #35737
  • Add lag detector #35685
  • Move ClusterState fields to be persisted to ClusterState.Metadata #35625
  • Introduce ClusterBootstrapService #35488
  • Introduce vote withdrawal #35446
  • Add basic Zen1 transport-level BWC #35443
  • Add elasticsearch-node detach-cluster tool #37979
  • Deprecate minimum_master_nodes #37868
  • Step down as master when configured out of voting configuration #37802 (issue: #37712)
  • Enforce cluster UUIDs #37775
  • Bubble exceptions up in ClusterApplierService #37729
  • Use m_m_nodes from Zen1 master for Zen2 bootstrap #37701
  • Add tool elasticsearch-node unsafe-bootstrap #37696
  • Report terms and version if cluster does not form #37473
  • Bootstrap a Zen2 cluster once quorum is discovered #37463
  • Zen2: Add join validation #37203
  • Publish cluster states in chunks #36973

Bug fixes

edit
Aggregations
  • Fix InternalAutoDateHistogram reproducible failure #32723 (issue: #32215)
  • fix MultiValuesSourceFieldConfig toXContent #36525 (issue: #36474)
  • Cache the score of the parent document in the nested agg #36019 (issues: #34555, #35985)
  • Correct implemented interface of ParsedReverseNested #35455 (issue: #35449)
  • Handle IndexOrDocValuesQuery in composite aggregation #35392
  • Don’t load global ordinals with the map execution_hint #37833 (issue: #37705)
  • Issue #37303 - Invalid variance fix #37384 (issue: #37303)
  • Skip sibling pipeline aggregators reduction during non-final reduce #40101 (issue: #40059)
  • Extend nextDoc to delegate to the wrapped doc-value iterator for date_nanos #39176 (issue: #39107)
  • Only create MatrixStatsResults on final reduction #38130 (issue: #37587)
Allocation
  • Fix _host based require filters #38173
  • ALLOC: Fail Stale Primary Alloc. Req. without Data #37226 (issue: #37098)
Analysis
  • Close #26771: beider_morse phonetic encoder failure when languageset unspecified #26848 (issue: #26771)
  • Fix PreConfiguredTokenFilters getSynonymFilter() implementations #38839 (issue: #38793)
Audit
  • Fix origin.type for connection_* events #36410
  • Fix IndexAuditTrail rolling restart on rollover edge #35988 (issue: #33867)
  • Fix NPE in Logfile Audit Filter #38120 (issue: #38097)
  • LoggingAuditTrail correctly handle ReplicatedWriteRequest #39925 (issue: #39555)
Authorization
Authentication
  • Fix kerberos setting registration #35986 (issues: #30241, #35942)
  • Add support for Kerberos V5 Oid #35764 (issue: #34763)
  • Enhance parsing of StatusCode in SAML Responses #38628
  • Limit token expiry to 1 hour maximum #38244
  • Fix expired token message in Exception header #37196
  • Fix NPE in CachingUsernamePasswordRealm #36953 (issue: #36951)
  • Allow non super users to create API keys #40028 (issue: #40029)
  • Use consistent view of realms for authentication #38815 (issue: #30301)
  • Correct authenticate response for API key #39684
  • Fix security index auto-create and state recovery race #39582
Build
  • Use explicit deps on test tasks for check #36325
  • Fix jdbc jar pom to not include deps #36036 (issue: #32014)
  • Fix official plugins list #35661 (issue: #35623)
CCR
  • Fix follow stats API’s follower index filtering feature #36647
  • AutoFollowCoordinator should tolerate that auto follow patterns may be removed #35945 (issue: #35937)
  • Only auto follow indices when all primary shards have started #35814 (issue: #35480)
  • Avoid NPE in follower stats when no tasks metadata #35802
  • Fix the names of CCR stats endpoints in usage API #35438
  • Prevent CCR recovery from missing documents #38237
  • Fix file reading in ccr restore service #38117
  • Correct argument names in update mapping/settings from leader #38063
  • Ensure changes requests return the latest mapping version #37633
  • Do not set fatal exception when shard follow task is stopped. #37603
  • Add fatal_exception field for ccr stats in monitoring mapping #37563
  • Do not add index event listener if CCR disabled #37432
  • When removing an AutoFollower also mark it as removed. #37402 (issue: #36761)
  • Make shard follow tasks more resilient for restarts #37239 (issue: #37231)
  • Resume follow Api should not require a request body #37217 (issue: #37022)
  • Report error if auto follower tries auto follow a leader index with soft deletes disabled #36886 (issue: #33007)
  • Remote cluster license checker and no license info. #36837 (issue: #36815)
  • Make CCR resilient against missing remote cluster connections #36682 (issues: #36255, #36667)
  • AutoFollowCoordinator and follower index already created #36540 (issue: #33007)
  • Safe publication of AutoFollowCoordinator #40153 (issue: #38560)
  • Enable reading auto-follow patterns from x-content #40130 (issue: #40128)
  • Stop auto-followers on shutdown #40124
  • Protect against the leader index being removed #39351 (issue: #39308)
  • Handle the fact that ShardStats instance may have no commit or seqno stats #38782 (issue: #38779)
  • Fix LocalIndexFollowingIT#testRemoveRemoteConnection() test #38709 (issue: #38695)
  • Fix shard follow task startup error handling #39053 (issue: #38779)
  • Filter out upgraded version index settings when starting index following #38838 (issue: #38835)
Circuit Breakers
  • Modify BigArrays to take name of circuit breaker #36461 (issue: #31435)
Core
  • Fix CompositeBytesReference#slice to not throw AIOOBE with legal offsets. #35955 (issue: #35950)
  • Suppress CachedTimeThread in hot threads output #35558 (issue: #23175)
  • Upgrade to Joda 2.10.1 #35410 (issue: #33749)
CRUD
  • Fix Reindex from remote query logic #36908
  • Synchronize WriteReplicaResult callbacks #36770
  • Cascading primary failure lead to MSU too low #40249
  • Store Pending Deletions Fix #40345 (issue: #40249)
  • ShardBulkAction ignore primary response on primary #38901
Cluster Coordination
  • Fix node tool cleanup #39389
  • Avoid serialising state if it was already serialised #39179
  • Do not perform cleanup if Manifest write fails with dirty exception #40519 (issue: #39077)
  • Cache compressed cluster state size #39827 (issue: #39806)
  • Drop node if asymmetrically partitioned from master #39598
  • Fixing the custom object serialization bug in diffable utils. #39544
  • Clean GatewayAllocator when stepping down as master #38885
Distributed
  • Combine the execution of an exclusive replica operation with primary term update #36116 (issue: #35850)
  • ActiveShardCount should not fail when closing the index #35936
  • TransportVerifyShardBeforeCloseAction should force a flush #38401 (issues: #33888, #37961)
  • Fix limit on retaining sequence number #37992 (issue: #37165)
  • Close Index API should force a flush if a sync is needed #37961 (issues: #33888, #37426)
  • Force Refresh Listeners when Acquiring all Operation Permits #36835
  • Replaced the word shards with replicas in an error message. (#36234) #36275 (issue: #36234)
  • Ignore waitForActiveShards when syncing leases #39224 (issue: #39089)
  • Fix synchronization in LocalCheckpointTracker#contains #38755 (issues: #33871, #38633)
  • Enforce retention leases require soft deletes #39922 (issue: #39914)
  • Treat TransportService stopped error as node is closing #39800 (issue: #39584)
  • Use cause to determine if node with primary is closing #39723 (issue: #39584)
  • Don’t ack if unable to remove failing replica #39584 (issue: #39467)
  • Fix NPE on Stale Index in IndicesService #38891 (issue: #38845)
Engine
  • Set Lucene version upon index creation. #36038 (issue: #33826)
  • Wrap can_match reader with ElasticsearchDirectoryReader #35857
  • Copy checkpoint atomically when rolling generation #35407
  • Subclass NIOFSDirectory instead of using FileSwitchDirectory #37140 (issues: #36668, #37111)
  • Bubble up exception when processing NoOp #39338 (issue: #38898)
  • ReadOnlyEngine should update translog recovery state information #39238
  • Advance max_seq_no before add operation to Lucene #38879 (issue: #31629)
Features/Features
  • Only count some fields types for deprecation check #40166
  • Deprecation check for indices with very large numbers of fields #39869 (issue: #39851)
Features/ILM
  • Preserve ILM operation mode when creating new lifecycles #38134 (issues: #38229, #38230)
  • Retry ILM steps that fail due to SnapshotInProgressException #37624 (issues: #37541, #37552)
  • Remove indexing_complete when removing policy #36620
  • Handle failure to release retention leases in ILM #39281 (issue: #39181)
  • Correct ILM metadata minimum compatibility version #40569 (issue: #40565)
  • Handle null retention leases in WaitForNoFollowersStep #40477
  • Allow ILM to stop if indices have nonexistent policies #40820 (issue: #40824)
Features/Indices APIs
  • Validate top-level keys for create index request (#23755) #23869 (issue: #23755)
  • Reject delete index requests with a body #37501 (issue: #8217)
  • Fix duplicate phrase in shrink/split error message #36734 (issue: #36729)
  • Get Aliases with wildcard exclusion expression #34230 (issues: #33518, #33805, #34144)
Features/Ingest
Features/Java High Level REST Client
  • Drop extra level from user parser #34932
  • Update IndexTemplateMetadata to allow unknown fields #38448 (issue: #36938)
  • if_seq_no and if_primary_term parameters aren’t wired correctly in REST Client’s CRUD API #38411
  • Update Rollup Caps to allow unknown fields #38339 (issue: #36938)
  • Fix ILM explain response to allow unknown fields #38054 (issue: #36938)
  • Fix ILM status to allow unknown fields #38043 (issue: #36938)
  • Fix ILM Lifecycle Policy to allow unknown fields #38041 (issue: #36938)
  • Update authenticate to allow unknown fields #37713 (issue: #36938)
  • Update verify repository to allow unknown fields #37619 (issue: #36938)
  • Update get users to allow unknown fields #37593 (issue: #36938)
  • Update Execute Watch to allow unknown fields #37498 (issue: #36938)
  • Update Put Watch to allow unknown fields #37494 (issue: #36938)
  • Update Delete Watch to allow unknown fields #37435 (issue: #36938)
  • Fix rest reindex test for IPv4 addresses #37310
  • Fix weighted_avg parser not found for RestHighLevelClient #37027 (issue: #36861)
Features/Java Low Level REST Client
  • Remove I/O pool blocking sniffing call from onFailure callback, add some logic around host exclusion #27985 (issue: #27984)
  • Fix potential IllegalCapacityException in LLRC when selecting nodes #37821
Features/Monitoring
  • Allow built-in monitoring_user role to call GET _xpack API #38060 (issue: #37970)
  • Don’t emit deprecation warnings on calls to the monitoring bulk API. #39805 (issue: #39336)
Features/Watcher
  • Ignore system locale/timezone in croneval CLI tool #33215
  • Support merge nested Map in list for JIRA configurations #37634 (issue: #30068)
  • Watcher accounts constructed lazily #36656
  • Ensures watch definitions are valid json #30692 (issue: #29746)
  • Use non-ILM template setting up watch history template & ILM disabled #39325 (issue: #38805)
  • Only flush Watcher’s bulk processor if Watcher is enabled #38803 (issue: #38798)
  • Fix Watcher stats class cast exception #39821 (issue: #39780)
  • Use any index specified by .watches for Watcher #39541 (issue: #39478)
  • Resolve concurrency with watcher trigger service #39092 (issue: #39087)
  • Metric on watcher stats is a list not an enum #39114
Geo
  • Test GeoShapeQueryTests#testPointsOnly fails #27454
  • More robust handling of ignore_malformed in geoshape parsing #35603 (issues: #34047, #34498)
  • Better handling of malformed geo_points #35554 (issue: #35419)
  • Enables coerce support in WKT polygon parser #35414 (issue: #35059)
  • Fix GeoHash PrefixTree BWC #38584 (issue: #38494)
  • Do not normalize the longitude with value -180 for Lucene shapes #37299 (issue: #37297)
  • Geo Point parse error fix #40447 (issue: #17617)
Highlighting
  • Bug fix for AnnotatedTextHighlighter - port of 39525 #39750 (issue: #39525)
Infra/Core
  • Ensure shard is refreshed once it’s inactive #27559 (issue: #27500)
  • Bubble-up exceptions from scheduler #38317 (issue: #38014)
  • Revert back to joda’s multi date formatters #36814 (issues: #36447, #36602)
  • Propagate Errors in executors to uncaught exception handler #36137 (issue: #28667)
  • Correct name of basic_date_time_no_millis #39367
  • Allow single digit milliseconds in strict date parsing #40676 (issue: #40403)
  • Parse composite patterns using ClassicFormat.parseObject #40100 (issue: #39916)
  • Bat scripts to work with JAVA_HOME with parantheses #39712 (issues: #30606, #33405, #38578, #38624)
  • Change licence expiration date pattern #39681 (issue: #39136)
  • Fix DateFormatters.parseMillis when no timezone is given #39100 (issue: #39067)
  • Don’t close caches while there might still be in-flight requests. #38958 (issue: #37117)
  • Allow single digit milliseconds in strict date parsing #40676 (issue: #40403)
Infra/Packaging
  • Remove NOREPLACE for /etc/elasticsearch in rpm and deb #37839
  • Packaging: Update marker used to allow ELASTIC_PASSWORD #37243 (issue: #37240)
  • Remove permission editing in postinst #37242 (issue: #37143)
  • Some elasticsearch-cli tools could not be run not from ES_HOME #39937
  • Obsolete pre 7.0 noarch package in rpm #39472 (issue: #39414)
  • Suppress error message when /proc/sys/vm/max_map_count is not exists. #35933
  • Use TAR instead of DOCKER build type before 6.7.0 #40723 (issues: #39378, #40511)
  • Source additional files correctly in elasticsearch-cli #40890 (issue: #40889)
Infra/REST API
  • Reject all requests that have an unconsumed body #37504 (issues: #30792, #37501, #8217)
  • Fix #38623 remove xpack namespace REST API #38625
  • Remove the "xpack" namespace from the REST API #38623
  • Update spec files that erroneously documented parts as optional #39122
  • ilm.explain_lifecycle documents human again #39113
  • Index on rollup.rollup_search.json is a list #39097
Infra/Scripting
  • Fix Painless void return bug #38046
  • Correct bug in ScriptDocValues #40488
Infra/Settings
  • Change format how settings represent lists / array #26723
  • Fix setting by time unit #37192
  • Fix handling of fractional byte size value settings #37172
  • Fix handling of fractional time value settings #37171
Infra/Transport API
  • Remove version read/write logic in Verify Response #30879 (issue: #30807)
  • Enable muted Repository test #30875 (issue: #30807)
  • Bad regex in CORS settings should throw a nicer error #29108
Index APIs
  • Fix duplicate phrase in shrink/split error message #36734 (issue: #36729)
  • Raise a 404 exception when document source is not found (#33384) #34083 (issue: #33384)
Ingest
  • Fix on_failure with Drop processor #36686 (issue: #36151)
  • Support default pipelines + bulk upserts #36618 (issue: #36219)
  • Support default pipeline through an alias #36231 (issue: #35817)
License
  • Update versions for start_trial after backport #30218 (issue: #30135)
  • Do not serialize basic license exp in x-pack info #30848
  • Update versions for start_trial after backport #30218 (issue: #30135)
Machine Learning
  • Interrupt Grok in file structure finder timeout #36588
  • Prevent stack overflow while copying ML jobs and datafeeds #36370 (issue: #36360)
  • Adjust file structure finder parser config #35935
  • Fix find_file_structure NPE with should_trim_fields #35465 (issue: #35462)
  • Prevent notifications being created on deletion of a non existent job #35337 (issues: #34058, #35336)
  • Clear Job#finished_time when it is opened (#32605) #32755
  • Fix thread leak when waiting for job flush (#32196) #32541 (issue: #32196)
  • Fix CPoissonMeanConjugate sampling error. #335
  • Report index unavailable instead of waiting for lazy node #38423
  • Fix error race condition on stop _all datafeeds and close _all jobs #38113 (issue: #37959)
  • Update ML results mappings on process start #37706 (issue: #37607)
  • Prevent submit after autodetect worker is stopped #37700 (issue: #37108)
  • Fix ML datafeed CCS with wildcarded cluster name #37470 (issue: #36228)
  • Update error message for process update #37363
  • Wait for autodetect to be ready in the datafeed #37349 (issues: #36810, #37227)
  • Stop datafeeds running when their jobs are stale #37227 (issue: #36810)
  • Order GET job stats response by job id #36841 (issue: #36683)
  • Make GetJobStats work with arbitrary wildcards and groups #36683 (issue: #34745)
  • Fix datafeed skipping first bucket after lookback when aggs are … #39859 (issue: #39842)
  • Refactoring lazy query and agg parsing #39776 (issue: #39528)
  • Stop the ML memory tracker before closing node #39111 (issue: #37117)
  • Scrolling datafeed should clear scroll contexts on error #40773 (issue: #40772)
Mapping
  • Ensure that field aliases cannot be used in multi-fields. #32219
  • Treat put-mapping calls with _doc as a top-level key as typed calls. #38032
  • Correct deprec log in RestGetFieldMappingAction #37843 (issue: #37667)
  • Restore a noop _all metadata field for 6x indices #37808 (issue: #37429)
  • Make sure PutMappingRequest accepts content types other than JSON. #37720
  • Make sure to use the resolved type in DocumentMapperService#extractMappings. #37451 (issue: #36811)
  • Improve Precision for scaled_float #37169 (issue: #32570)
  • Make sure to accept empty unnested mappings in create index requests. #37089
  • Stop automatically nesting mappings in index creation requests. #36924
  • Rewrite SourceToParse with resolved docType #36921 (issues: #35790, #36769)
  • Optimise rejection of out-of-range long values #40325 (issues: #26137, #40323)
  • Make sure to reject mappings with type _doc when include_type_name is false. #38270 (issue: #38266)
Network
  • Adjust SSLDriver behavior for JDK11 changes #32145 (issues: #32122, #32144)
  • Netty4SizeHeaderFrameDecoder error #31057
  • Fix memory leak in http pipelining #30815 (issue: #30801)
  • Fix issue with finishing handshake in ssl driver #30580
  • Do not resolve addresses in remote connection info #36671 (issue: #35658)
  • Always compress based on the settings #36522 (issue: #36399)
  • http.publish_host Should Contain CNAME #32806 (issue: #22029)
  • Adjust SSLDriver behavior for JDK11 changes #32145 (issues: #32122, #32144)
  • Add TRACE, CONNECT, and PATCH http methods #31035 (issue: #31017)
  • Transport client: Don’t validate node in handshake #30737 (issue: #30141)
  • Fix issue with finishing handshake in ssl driver #30580
  • Remove potential nio selector leak #27825
  • Fix issue where the incorrect buffers are written #27695 (issue: #27551)
  • Do not set SO_LINGER on server channels #26997
  • Do not set SO_LINGER to 0 when not shutting down #26871 (issue: #26764)
  • Release pipelined http responses on close #26226
  • Reload SSL context on file change for LDAP #36937 (issues: #30509, #36923)
  • Do not resolve addresses in remote connection info #36671 (issue: #35658)
Packaging
  • Fix error message when package install fails due to missing Java #36077 (issue: #31845)
  • Add missing entries to conffiles #35810 (issue: #35691)
Plugins
  • Ensure that azure stream has socket privileges #28751 (issue: #28662)
Ranking
  • QueryRescorer should keep the window size when rewriting #36836
Recovery
  • Register ResyncTask.Status as a NamedWriteable #36610
  • RecoveryMonitor#lastSeenAccessTime should be volatile #36781
  • Create retention leases file during recovery #39359 (issue: #37165)
  • Recover peers from translog, ignoring soft deletes #38904 (issue: #37165)
  • Retain history for peer recovery using leases #38855
  • Resync should not send operations without sequence number #40433
Rollup
  • Fix rollup search statistics #36674
  • Fix Rollup’s metadata parser #36791 (issue: #36726)
  • Fix rollup search statistics #36674
  • Remove timezone validation on rollup range queries #40647
  • Rollup ignores time_zone on date histogram #40844
Scripting
  • Properly support no-offset date formatting #36316 (issue: #36306)
  • [Painless] Generate Bridge Methods #36097
  • Fix serialization bug in painless execute api request #36075 (issue: #36050)
  • Actually add joda time back to whitelist #35965 (issue: #35915)
  • Add back joda to whitelist #35915 (issue: #35913)
Settings
Search
  • Ensure realtime _get and _termvectors don’t run on the network thread #33814 (issue: #27500)
  • [bug] fuzziness custom auto #33462 (issue: #33454)
  • Fix inner hits retrieval when stored fields are disabled (none) #33018 (issue: #32941)
  • Set maxScore for empty TopDocs to Nan rather than 0 #32938
  • Handle leniency for cross_fields type in multi_match query #27045 (issue: #23210)
  • Raise IllegalArgumentException instead if query validation failed #26811 (issue: #26799)
  • Inner hits fail to propagate doc-value format. #36310
  • Fix custom AUTO issue with Fuzziness#toXContent #35807 (issue: #33462)
  • Fix analyzed prefix query in query_string #35756 (issue: #31702)
  • Fix problem with MatchNoDocsQuery in disjunction queries #35726 (issue: #34708)
  • Fix phrase_slop in query_string query #35533 (issue: #35125)
  • Add a More Like This query routing requirement check (#29678) #33974
  • Look up connection using the right cluster alias when releasing contexts #38570
  • Fix fetch source option in expand search phase #37908 (issue: #23829)
  • Change rational to saturation in script_score #37766 (issue: #37714)
  • Throw if two inner_hits have the same name #37645 (issue: #37584)
  • Ensure either success or failure path for SearchOperationListener is called #37467 (issue: #37185)
  • query_string should use indexed prefixes #36895
  • Avoid duplicate types deprecation messages in search-related APIs. #36802
  • Serialize top-level pipeline aggs as part of InternalAggregations #40177 (issues: #40059, #40101)
  • CCS: Skip empty search hits when minimizing round-trips #40098 (issues: #32125, #40067)
  • CCS: Disable minimizing round-trips when dfs is requested #40044 (issue: #32125)
  • Fix Fuzziness#asDistance(String) #39643 (issue: #39614)
  • Fix alias resolution runtime complexity. #40263 (issue: #40248)
Security
  • Handle 6.4.0+ BWC for Application Privileges #32929
  • Remove license state listeners on closeables #36308 (issues: #33328, #35627, #35628)
  • Fix exit code for Security CLI tools #37956 (issue: #37841)
  • Fix potential NPE in UsersTool #37660
  • Remove dynamic objects from security index #40499 (issue: #35460)
  • Fix libs:ssl-config project setup #39074
  • Do not create the missing index when invoking getRole #39039
Snapshot/Restore
  • Upgrade GCS Dependencies to 1.55.0 #36634 (issues: #35229, #35459)
  • Improve Resilience SnapshotShardService #36113 (issue: #32265)
  • Keep SnapshotsInProgress State in Sync with Routing Table #35710
  • Ensure that gcs client creation is privileged #25938 (issue: #25932)
  • Make calls to CloudBlobContainer#exists privileged #25937 (issue: #25931)
  • Fix Concurrent Snapshot Ending And Stabilize Snapshot Finalization #38368 (issue: #38226)
  • Fix Two Races that Lead to Stuck Snapshots #37686 (issues: #32265, #32348)
  • Fix Race in Concurrent Snapshot Delete and Create #37612 (issue: #37581)
  • Streamline S3 Repository- and Client-Settings #37393
  • Blob store compression fix #39073
SQL
  • Fix translation of LIKE/RLIKE keywords #36672 (issues: #36039, #36584)
  • Scripting support for casting functions CAST and CONVERT #36640 (issue: #36061)
  • Fix translation to painless for conditionals #36636 (issue: #36631)
  • Concat should be always not nullable #36601 (issue: #36169)
  • Fix MOD() for long and integer arguments #36599 (issue: #36364)
  • Fix issue with complex HAVING and GROUP BY ordinal #36594 (issue: #36059)
  • Be lenient for tests involving comparison to H2 but strict for csv spec tests #36498 (issue: #36483)
  • Non ISO 8601 versions of DAY_OF_WEEK and WEEK_OF_YEAR functions #36358 (issue: #36263)
  • Do not ignore all fields whose names start with underscore #36214 (issue: #36206)
  • Fix issue with wrong data type for scripted Grouping keys #35969 (issue: #35662)
  • Fix translation of math functions to painless #35910 (issue: #35654)
  • Fix jdbc jar to include deps #35602
  • Fix query translation for scripted queries #35408 (issue: #35232)
  • Clear the cursor if nested inner hits are enough to fulfill the query required limits #35398 (issue: #35176)
  • Introduce IsNull node to simplify expressions #35206 (issues: #34876, #35171)
  • The SSL default configuration shouldn’t override the https protocol if used #34635 (issue: #33817)
  • Minor fix for javadoc #32573 (issue: #32553)
  • Prevent grouping over grouping functions #38649 (issue: #38308)
  • Relax StackOverflow circuit breaker for constants #38572 (issue: #38571)
  • Fix issue with IN not resolving to underlying keyword field #38440 (issue: #38424)
  • Change the Intervals milliseconds precision to 3 digits #38297 (issue: #37423)
  • Fix esType for DATETIME/DATE and INTERVALS #38179 (issue: #38051)
  • Added SSL configuration options tests #37875 (issue: #37711)
  • Fix casting from date to numeric type to use millis #37869 (issue: #37655)
  • Fix BasicFormatter NPE #37804
  • Return Intervals in SQL format for CLI #37602 (issues: #29970, #36186, #36432)
  • Fix object extraction from sources #37502 (issue: #37364)
  • Fix issue with field names containing "." #37364 (issue: #37128)
  • Fix bug regarding alias fields with dots #37279 (issue: #37224)
  • Proper handling of COUNT(field_name) and COUNT(DISTINCT field_name) #37254 (issue: #30285)
  • Fix COUNT DISTINCT filtering #37176 (issue: #37086)
  • Fix issue with wrong NULL optimization #37124 (issue: #35872)
  • Fix issue with complex expression as args of PERCENTILE/_RANK #37102 (issue: #37099)
  • Handle the bwc Joda ZonedDateTime scripting class in Painless #37024 (issue: #37023)
  • Fix bug regarding histograms usage in scripting #36866
  • Fix issue with always false filter involving functions #36830 (issue: #35980)
  • Protocol returns ISO 8601 String formatted dates instead of Long for JDBC/ODBC requests #36800 (issue: #36756)
  • Enhance Verifier to prevent aggregate or grouping functions from #36799 (issue: #36798)
  • Fix translation of LIKE/RLIKE keywords #36672 (issues: #36039, #36584)
  • Scripting support for casting functions CAST and CONVERT #36640 (issue: #36061)
  • Concat should be always not nullable #36601 (issue: #36169)
  • Fix issue with complex HAVING and GROUP BY ordinal #36594 (issue: #36059)
  • Add missing handling of IP field in JDBC #40384 (issue: #40358)
  • Fix metric aggs on date/time to not return double #40377 (issues: #39492, #40376)
  • CAST supports both SQL and ES types #40365 (issue: #40282)
  • Fix RLIKE bug and improve testing for RLIKE statement #40354 (issues: #34609, #39931)
  • Unwrap the first value in an array in case of array leniency #40318 (issue: #40296)
  • Preserve original source for cast/convert function #40271 (issue: #40239)
  • Fix LIKE function equality by considering its pattern as well #40260 (issue: #39931)
  • Fix issue with optimization on queries with ORDER BY/LIMIT #40256 (issue: #40211)
  • Rewrite ROUND and TRUNCATE functions with a different optional parameter handling method #40242 (issue: #40001)
  • Fix issue with getting DATE type in JDBC #40207
  • Fix issue with date columns returned always in UTC #40163 (issue: #40152)
  • Add multi_value_field_leniency inside FieldHitExtractor #40113 (issue: #39700)
  • Fix incorrect ordering of groupings (GROUP BY) based on orderings (ORDER BY) #40087 (issue: #39956)
  • Fix bug with JDBC timezone setting and DATE type #39978 (issue: #39915)
  • Use underlying exact field for LIKE/RLIKE #39443 (issue: #39442)
  • Fix display size for DATE/DATETIME #40669
  • Have LIKE/RLIKE use wildcard and regexp queries #40628 (issue: #40557)
  • Fix getTime() methods in JDBC #40484
  • SYS TABLES: enumerate tables of requested types #40535 (issue: #40348)
  • Passing an input to the CLI "freezes" the CLI after displaying an error message #40164 (issue: #40557)
  • Wrap ZonedDateTime parameters inside scripts #39911 (issue: #39877)
  • ConstantProcessor can now handle NamedWriteable #39876 (issue: #39875)
  • Extend the multi dot field notation extraction to lists of values #39823 (issue: #39738)
  • Values in datetime script aggs should be treated as long #39773 (issue: #37042)
  • Don’t allow inexact fields for MIN/MAX #39563 (issue: #39427)
  • Fix merging of incompatible multi-fields #39560 (issue: #39547)
  • Fix COUNT DISTINCT column name #39537 (issue: #39511)
  • Enable accurate hit tracking on demand #39527 (issue: #37971)
  • Ignore UNSUPPORTED fields for JDBC and ODBC modes in SYS COLUMNS #39518 (issue: #39471)
  • Enforce JDBC driver - ES server version parity #38972 (issue: #38775)
  • Fall back to using the field name for column label #38842 (issue: #38831)
Suggesters
  • Fix duplicate removal when merging completion suggestions #36996 (issue: #35836)
Task Management
  • Un-assign persistent tasks as nodes exit the cluster #37656
Watcher
ZenDiscovery
  • Remove duplicate discovered peers #35505
  • Respect the no_master_block setting #36478
  • Cancel GetDiscoveredNodesAction when bootstrapped #36423 (issues: #36380, #36381)
  • Only elect master-eligible nodes #35996
  • Remove duplicate discovered peers #35505
  • Fix size of rolling-upgrade bootstrap config #38031
  • Always return metadata version if metadata is requested #37674
  • Elect freshest master in upgrade #37122 (issue: #40)
  • Fix cluster state persistence for single-node discovery #36825

Regressions

edit
Infra/Core
  • Restore date aggregation performance in UTC case #38221 (issue: #37826)
  • Speed up converting of temporal accessor to zoned date time #37915 (issue: #37826)
Mapping
  • Performance fix. Reduce deprecation calls for the same bulk request #37415 (issue: #37411)
Scripting
  • Use Number as a return value for BucketAggregationScript #35653 (issue: #35351)

Upgrades

edit
Discovery-Plugins
  • Bump jackson-databind version for AWS SDK #39183
Engine
  • Upgrade to lucene-8.0.0-snapshot-83f9835. #37668
  • Upgrade to Lucene 8.0.0-snapshot-ff9509a8df #39350
  • Upgrade to Lucene 8.0.0 #39992 (issue: #39640)
Geo
Ingest
  • Update geolite2 database in ingest geoip plugin #33840
  • Bump jackson-databind version for ingest-geoip #39182
Infra/Core
Security
  • Upgrade the bouncycastle dependency to 1.61 #40017 (issue: #40011)
Search
Snapshot/Restore
  • plugins/repository-gcs: Update google-cloud-storage/core to 1.59.0 #39748 (issue: #39366)
Network
Machine Learning
  • No need to add state doc mapping on job open in 7.x #37759
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