IMPORTANT: No additional bug fixes or documentation updates will be released for this version. For the latest information, see the current release documentation.

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Elasticsearch version 6.7.0

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Elasticsearch version 6.7.0

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Also see Breaking changes in 6.7.

Known issues

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A new docker build_type value was introduced in 6.7.0 for Docker images, which caused two problems:

If you perform a rolling upgrade to 6.7.0 on nodes that are running the official Docker container, they cannot rejoin the cluster. Upgrade to 6.7.1 instead or perform a full cluster restart upgrade. (issue: #40784)
If you have a 6.6 or earlier Java High Level REST client, it cannot understand the new build_type value. For example, it cannot read main responses on / from a cluster that’s running 6.7.0. Upgrade your client to 6.7.0 or later. (issue: #40511)

Features/ILM

If an index is configured with an index.lifecycle.name that refers to a policy that does not exist, when index lifecycle management is stopped, index lifecycle management’s status will remain as STOPPING until all policies that do not exist are removed from any indices by using the Remove Policy API. (issue: #40824)

Breaking changes

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Authentication

The TokenService no longer accepts tokens generated by Elasticsearch 6.1 or earlier #38881

CCR

Follow stats api should return a 404 when requesting stats for a non existing index #37220 (issue: #37021)

Distributed

Stop returning cluster state size by default #40016 (issues: #39806, #39827, #39951)

Infra/Packaging

Package ingest-user-agent as a module #36956
Package ingest-geoip as a module #36898

Ranking

Forbid negative field boosts in analyzed queries #37930 (issue: #33309)

Breaking Java changes

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Infra/Core

Handle scheduler exceptions #38014 (issues: #28667, #36137, #37708)

Deprecations

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Analysis

[Analysis] Deprecate standard html analyzer in 6.x #37292 (issues: #26719, #4704)

Audit

Deprecate index audit output type #37671 (issues: #29881, #37301)
Deprecate index audit output type #37301 (issue: #29881)

CRUD

Deprecate support for internal versioning for concurrency control #38451 (issues: #10708, #38254)

Cluster Coordination

Deprecate size in cluster state response #39951 (issue: #39806)

Features/Features

Deprecate Migration Assistance and Upgrade APIs #40072 (issue: #40014)

Features/Java High Level REST Client

Deprecate HLRC EmptyResponse used by security #37540 (issue: #36938)

Features/Java Low Level REST Client

Deprecate the low-level REST client on JDK 7 #38542 (issue: #29607)
Deprecate maxRetryTimeout in RestClient and increase default value #38425 (issue: #38085)

Features/Watcher

Deprecate Hipchat Watcher actions #39160

Infra/Core

Core: Deprecate negative epoch timestamps #36793

Infra/Packaging

Deprecate fallback to java on PATH #37990

Infra/REST API

Deprecate requests that have an unconsumed body #37534 (issue: #37504)

Machine Learning

Add ml_settings entry to HLRC and Docs for deprecation_info #38118
Datafeed deprecation checks #37932
Adjust structure finder for Joda to Java time migration #37306

Mapping

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)

Network

Add TLS version changes to deprecation checks #37793 (issue: #37512)
Issue deprecation warning if TLSv1.0 is used without explicit config #37788 (issue: #37512)
Add deprecation warnings for ssl config fallback #36847 (issue: #36846)

Security

Deprecate implicit security on trial licenses #38295 (issues: #38009, #38075)

New features

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Authentication

Add support for API keys to access Elasticsearch #38291 (issue: #34383)

Authorization

Allow custom authorization with an authorization engine #38358 (issues: #32435, #36245, #37328, #37495, #37785, #38137, #38219)
WIldcard IndicesPermissions don’t cover .security #36765

CCR

Add ccr follow info api #37408 (issue: #37127)

CRUD

Make _doc work as an alias of the actual type of an index. #39505 (issue: #39469)

Features/ILM

[ILM] Add unfollow action #36970 (issue: #34648)

Features/Ingest

Enable grok processor to support long, double and boolean #27896

Machine Learning

Add set_upgrade_mode API endpoint #37837

Mapping

Give precedence to index creation when mixing typed templates with typeless index creation and vice-versa. #37871 (issue: #37773)
Add an include_type_name option to 6.x. (#29453) #37147 (issue: #35190)

SQL

SQL: Allow sorting of groups by aggregates #38042 (issue: #35118)
SQL: Implement FIRST/LAST aggregate functions #37936 (issue: #35639)
SQL: Introduce SQL DATE data type #37693 (issue: #37340)

Security

Switch internal security index to ".security-7" #39337 (issue: #39284)

Enhancements

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Aggregations

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

Audit

Security Audit includes HTTP method for requests #37322 (issue: #29765)
Add X-Forwarded-For to the logfile audit #36427

Authentication

Security: propagate auth result to listeners #36900 (issue: #30794)
Security: reorder realms based on last success #36878
Deprecation check for Auth realm setting structure #36664 (issue: #36024)

Authorization

Permission for restricted indices #37577 (issue: #34454)
Create snapshot role #35820 (issue: #34454)

CCR

Reduce retention lease sync intervals #40302
Introduce forget follower API #39718 (issue: #37165)
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)
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)
[CCR] FollowingEngine should fail with 403 if operation has no seqno assigned #37213
[CCR] Added auto_follow_exception.timestamp field to auto follow stats #36947

CRUD

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
Set acking timeout to 0 on dynamic mapping update #31140 (issues: #30672, #30844)

Client

Fixed required fields and paths list #39358

Cluster Coordination

Expose minimum_master_nodes in cluster state #37811 (issue: #37701)

Distributed

Add BWC for retention leases #39482 (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)
Introduce retention lease actions #38756 (issue: #37165)
Add dedicated retention lease exceptions #38754 (issue: #37165)
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)
Copy retention leases when trim unsafe commits #37995 (issue: #37165)
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)
Always initialize the global checkpoint #34381

Docs Infrastructure

Align generated release notes with doc standards #39234 (issue: #39155)

Engine

Also mmap cfs files for hybridfs #38940 (issue: #36668)
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
Introduce time-based retention policy for soft-deletes #34943 (issue: #34908)

Features/CAT APIs

Expose search.throttled on _cat/indices #37073 (issue: #34352)

Features/Features

Deprecation check for No Master Block setting #38383 (issue: #36024)
Run Node deprecation checks locally #38065 (issue: #37845)
Watcher notification settings Upgrade checks #36907

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)
[ILM] Add Freeze Action #36910 (issue: #34630)

Features/Indices APIs

New mapping signature and mapping string source fixed. #37401

Features/Ingest

minor updates for user-agent ecs for 6.7 #39213 (issue: #38757)
Dep. check for ECS changes to User Agent processor #38362 (issue: #36024)
Add ECS schema for user-agent ingest processor #37727 (issue: #37329)
ingest: compile mustache template only if field includes {{' #37207 (issue: #37120)
Move ingest-geoip default databases out of config #36949 (issue: #36898)

Features/Java High Level REST Client

HLRC: Fix strict setting exception handling #37247 (issue: #37090)
HLRC: Use nonblocking entity for requests #32249

Features/Watcher

Move watcher to use seq# and primary term for concurrency control #37977 (issues: #10708, #37872)

Infra/Core

Use DateFormatter in monitoring instead of joda code #38309
Use dateformatter in ingest-common to log deprecations #38099
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)
restrict node start-up when cluster name in data path #36519 (issue: #32661)

Infra/Logging

Trim the JSON source in indexing slow logs #38081 (issue: #38080)
Optimize warning header de-duplication #37725 (issues: #35754, #37530, #37597, #37622)
Remove warn-date from warning headers #37622 (issues: #35754, #37530, #37597)
Add some deprecation optimizations #37597 (issues: #35754, #37530)
Only update response headers if we have a new one #37590 (issues: #35754, #37530)

Infra/Packaging

Upgrade bundled JDK and Docker images to JDK 12 #40229
Change file descriptor limit to 65535 #37537 (issue: #35839)
Exit batch files explictly using ERRORLEVEL #29583 (issue: #29582)

Infra/Scripting

Add getZone to JodaCompatibleZonedDateTime #37084

Infra/Settings

Provide a clearer error message on keystore add #39327 (issue: #39324)
Separate out validation of groups of settings #34184

License

Handle malformed license signatures #37137 (issue: #35340)

Machine Learning

Allow stop unassigned datafeed and relax unset upgrade mode wait #39034
Move ML Optimistic Concurrency Control to Seq No #38278 (issues: #10708, #36148)
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)
Migrate unallocated jobs and datafeeds #37536 (issue: #32905)
Adjust seccomp filter for Fedora 29. #354

Mapping

Only issue a deprecation warning if include_type_name is not set. #38825 (issue: #35190)
Log document id when MapperParsingException occurs #37800 (issue: #37658)
Types removal - add constants for include_type_names #37304
Deprecation check for index_options on numeric fields #37026 (issue: #36024)
Deprecation check for indices with multiple types #36952 (issues: #35190, #36024)
Use index-prefix fields for terms of length min_chars - 1 #36703

Recovery

Do not wait for advancement of checkpoint in recovery #39006 (issues: #38949, #39000)
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)

Rollup

Replace the TreeMap in the composite aggregation #36675

SQL

SQL: Enhance checks for inexact fields #39427 (issue: #38501)
SQL: change the default precision for CURRENT_TIMESTAMP function #39391 (issue: #39288)
SQL: add "validate.properties" property to JDBC’s allowed list of settings #39050 (issue: #38068)
SQL: Allow look-ahead resolution of aliases for WHERE clause #38450 (issue: #29983)
SQL: Implement CURRENT_DATE #38175 (issue: #38160)
SQL: Generate relevant error message when grouping functions are not used in GROUP BY #38017 (issue: #37952)
SQL: Skip the nested and object field types in case of an ODBC request #37948 (issue: #37801)
SQL: Add protocol tests and remove jdbc_type from drivers response #37516 (issues: #36635, #36882)
SQL: Remove slightly used meta commands #37506 (issue: #37409)
SQL: Describe aliases as views #37496 (issue: #37422)
SQL: Make FULL non-reserved keyword in the grammar #37377 (issue: #37376)
SQL: Use declared source for error messages #37161
SQL: 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)
SQL: Enhance message for PERCENTILE[_RANK] with field as 2nd arg #36933 (issue: #36903)
SQL: Preserve original source for each expression #36912 (issue: #36894)

Search

Add finalReduce flag to SearchRequest #38104 (issues: #37000, #37838)
Expose sequence number and primary terms in search responses #37639
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)

Security

Move CAS operations in TokenService to sequence numbers #38311 (issues: #10708, #37872)
Cleanup construction of interceptors #38294

Snapshot/Restore

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)
SNAPSHOT: Speed up HDFS Repository Writes #37069
Implement Atomic Blob Writes for HDFS Repository #37066 (issue: #37011)
[API] spelling: repositories #37053 (issue: #37035)
SNAPSHOT: Use CancellableThreads to Abort #35901 (issue: #21759)

Suggesters

[API] spelling: likelihood #37052 (issue: #37035)

Bug fixes

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Aggregations

Skip sibling pipeline aggregators reduction during non-final reduce #40101 (issue: #40059)
Only create MatrixStatsResults on final reduction #38130 (issue: #37587)
Don’t load global ordinals with the map execution_hint #37833 (issue: #37705)
Issue #37303 - Invalid variance fix #37384 (issue: #37303)

Allocation

Fix _host based require filters #38173
Ignore obsolete dangling indices #37824 (issue: #27073)
ALLOC: Fail Stale Primary Alloc. Req. without Data #37226 (issue: #37098)

Analysis

Fix PreConfiguredTokenFilters getSynonymFilter() implementations #38858 (issues: #38793, #38839)
Fix PreConfiguredTokenFilters getSynonymFilter() implementations #38839 (issue: #38793)

Audit

LoggingAuditTrail correctly handle ReplicatedWriteRequest #39925 (issue: #39555)
Fix IndexAuditTrail rolling upgrade on rollover edge - take 2 #38286 (issues: #33867, #35988, #37062)
Fix NPE in Logfile Audit Filter #38120 (issue: #38097)

Authentication

Correct authenticate response for API key #39684
Fix security index auto-create and state recovery race #39582
Use consistent view of realms for authentication #38815 (issue: #30301)
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)

CCR

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)
Fix shard follow task startup error handling #39053 (issue: #38779)
Filter out upgraded version index settings when starting index following #38838 (issue: #38835)
Handle the fact that ShardStats instance may have no commit or seqno stats #38782 (issue: #38779)
Fix LocalIndexFollowingIT#testRemoveRemoteConnection() test #38709 (issue: #38695)
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)
[CCR] Resume follow Api should not require a request body #37217 (issue: #37022)

CRUD

Cascading primary failure lead to MSU too low #40249
ShardBulkAction ignore primary response on primary #38901
Fix Reindex from remote query logic #36908

Cluster Coordination

Fixing the custom object serialization bug in diffable utils. #39544
Always return metadata version if metadata is requested #37674

Distributed

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)
Ignore waitForActiveShards when syncing leases #39224 (issue: #39089)
Fix synchronization in LocalCheckpointTracker#contains #38755 (issues: #33871, #38633)
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)

Engine

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)
Check for .watches that wasn’t upgraded properly #39609
Link to 7.0 documentation in deprecation checks #39194
Handle Null in FetchSourceContext#fetchSource #36839 (issue: #29293)

Features/ILM

Handle failure to release retention leases in ILM #39281 (issue: #39181)
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

Features/Indices APIs

Add pre-upgrade check to test cluster routing allocation is enabled #39340 (issue: #39339)
Reject delete index requests with a body #37501 (issue: #8217)
Get Aliases with wildcard exclusion expression #34230 (issues: #33518, #33805, #34144)

Features/Ingest

Ingest ingest then create index #39607 (issues: #32758, #32786, #36545)
Support unknown fields in ingest pipeline map configuration #38352 (issue: #36938)
Ingest node - user_agent, move device parsing to an object #38115 (issues: #37329, #38094)

Features/Java High Level REST Client

Allow setting of copy_settings in the HLRC #39752 (issue: #30255)
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 weighted_avg parser not found for RestHighLevelClient #37027 (issue: #36861)

Features/Monitoring

Specify include_type_name in HTTP monitoring. #38927 (issue: #37442)
Allow built-in monitoring_user role to call GET _xpack API #38060 (issue: #37970)

Features/Watcher

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)
Only flush Watcher’s bulk processor if Watcher is enabled #38803 (issue: #38798)

Geo

Geo: Do not normalize the longitude with value -180 for Lucene shapes #37299 (issue: #37297)

Highlighting

Bug fix for AnnotatedTextHighlighter #39525 (issue: #39395)

Infra/Core

Correct name of basic_date_time_no_millis #39367
Fix DateFormatters.parseMillis when no timezone is given #39100 (issue: #39067)
Prefix java formatter patterns with 8 #38712 (issue: #38567)
Bubble-up exceptions from scheduler #38317 (issue: #38014)
Core: Revert back to joda’s multi date formatters #36814 (issues: #36447, #36602)
Propagate Errors in executors to uncaught exception handler #36137 (issue: #28667)

Infra/Packaging

Remove NOREPLACE for /etc/elasticsearch in rpm and deb #37839
Packaging: Remove permission editing in postinst #37242 (issue: #37143)
Suppress error message when /proc/sys/vm/max_map_count is not exists. #35933

Infra/Scripting

Fix Painless void return bug #38046

Infra/Settings

Fix setting by time unit #37192
Fix handling of fractional byte size value settings #37172
Fix handling of fractional time value settings #37171

Machine Learning

Fix race condition when creating multiple jobs #40049 (issue: #38785)
Fix datafeed skipping first bucket after lookback when aggs are used #39859 (issue: #39842)
Refactoring lazy query and agg parsing #39776 (issue: #39528)
Allow aliased .ml-anomalies* index on PUT Job #38821 (issue: #38773)
Report index unavailable instead of waiting for lazy node #38423
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
Make GetJobStats work with arbitrary wildcards and groups #36683 (issue: #34745)

Mapping

Make sure to reject mappings with type _doc when include_type_name is false. #38270 (issue: #38266)
Treat put-mapping calls with _doc as a top-level key as typed calls. #38032
Update the deprecation message for typed put mapping requests. #37835
Make sure PutMappingRequest accepts content types other than JSON. #37720
MAPPING: 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

Network

Rebuild remote connections on profile changes #37678 (issue: #37201)
Reload SSL context on file change for LDAP #36937 (issues: #30509, #36923)

Ranking

QueryRescorer should keep the window size when rewriting #36836

Recovery

Create retention leases file during recovery #39359 (issue: #37165)
RecoveryMonitor#lastSeenAccessTime should be volatile #36781

SQL

SQL: Preserve original source for cast/convert function #40271 (issue: #40239)
SQL: Fix issue with optimization on queries with ORDER BY/LIMIT #40256 (issue: #40211)
SQL: Fix issue with getting DATE type in JDBC #40207
SQL: Fix issue with date columns returned always in UTC #40163 (issue: #40152)
SQL: Add multi_value_field_leniency inside FieldHitExtractor #40113 (issue: #39700)
SQL: fix incorrect ordering of groupings (GROUP BY) based on orderings (ORDER BY) #40087 (issue: #39956)
SQL: Fix bug with JDBC timezone setting and DATE type #39978 (issue: #39915)
SQL: Wrap ZonedDateTime parameters inside scripts #39911 (issue: #39877)
SQL: ConstantProcessor can now handle NamedWriteable #39876 (issue: #39875)
SQL: Extend the multi dot field notation extraction to lists of values #39823 (issue: #39738)
SQL: values in datetime script aggs should be treated as long #39773 (issue: #37042)
SQL: Don’t allow inexact fields for MIN/MAX #39563 (issue: #39427)
SQL: Fix merging of incompatible multi-fields #39560 (issue: #39547)
SQL: fix COUNT DISTINCT column name #39537 (issue: #39511)
SQL: ignore UNSUPPORTED fields for JDBC and ODBC modes in SYS COLUMNS #39518 (issue: #39471)
SQL: Use underlying exact field for LIKE/RLIKE #39443 (issue: #39442)
SQL: enforce JDBC driver - ES server version parity #38972 (issue: #38775)
SQL: fall back to using the field name for column label #38842 (issue: #38831)
SQL: Prevent grouping over grouping functions #38649 (issue: #38308)
SQL: Relax StackOverflow circuit breaker for constants #38572 (issue: #38571)
SQL: Fix issue with IN not resolving to underlying keyword field #38440 (issue: #38424)
SQL: change the Intervals milliseconds precision to 3 digits #38297 (issue: #37423)
SQL: Fix esType for DATETIME/DATE and INTERVALS #38179 (issue: #38051)
SQL: Added SSL configuration options tests #37875 (issue: #37711)
SQL: Fix casting from date to numeric type to use millis #37869 (issue: #37655)
SQL: Fix BasicFormatter NPE #37804
SQL: Return Intervals in SQL format for CLI #37602 (issues: #29970, #36186, #36432)
SQL: fix object extraction from sources #37502 (issue: #37364)
SQL: Fix issue with field names containing "." #37364 (issue: #37128)
SQL: Fix bug regarding alias fields with dots #37279 (issue: #37224)
SQL: Proper handling of COUNT(field_name) and COUNT(DISTINCT field_name) #37254 (issue: #30285)
SQL: fix COUNT DISTINCT filtering #37176 (issue: #37086)
SQL: Fix issue with wrong NULL optimization #37124 (issue: #35872)
SQL: Fix issue with complex expression as args of PERCENTILE/_RANK #37102 (issue: #37099)
SQL: Handle the bwc Joda ZonedDateTime scripting class in Painless #37024 (issue: #37023)
SQL: Fix bug regarding histograms usage in scripting #36866
SQL: Fix issue with always false filter involving functions #36830 (issue: #35980)
SQL: protocol returns ISO 8601 String formatted dates instead of Long for JDBC/ODBC requests #36800 (issue: #36756)
SQL: Enhance Verifier to prevent aggregate or grouping functions from #36799 (issue: #36798)
SQL: normalized keywords shouldn’t be allowed for groupings and sorting [ISSUE] #35203

Search

Serialize top-level pipeline aggs as part of InternalAggregations #40177 (issues: #40059, #40101)
Fix Fuzziness#asDistance(String) #39643 (issue: #39614)
Fix simple query string serialization conditional #38960 (issues: #21504, #38889)
Ensure that maxConcurrentShardRequests is never defaulted to 0 #38734
Look up connection using the right cluster alias when releasing contexts #38570
Fix fetch source option in expand search phase #37908 (issue: #23829)
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)
Use executor SAME to handle search related handlers #37427 (issues: #33732, #37392)

Security

Fix exit code for Security CLI tools #37956 (issue: #37841)
Fix potential NPE in UsersTool #37660

Snapshot/Restore

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
SNAPSHOTS: Upgrade GCS Dependencies to 1.55.0 #36634 (issues: #35229, #35459)

Suggesters

Fix duplicate removal when merging completion suggestions #36996 (issue: #35836)

Task Management

Un-assign persistent tasks as nodes exit the cluster #37656

Regressions

edit

Infra/Core

Speed up converting of temporal accessor to zoned date time #37915 (issue: #37826)

Upgrades

edit

Discovery-Plugins

Bump jackson-databind version for AWS SDK #39183

Features/Ingest

Bump jackson-databind version for ingest-geoip #39182

Security

Upgrade the bouncycastle dependency to 1.61 #40017 (issue: #40011)

Snapshot/Restore

plugins/repository-gcs: Update google-cloud-storage/core to 1.59.0 #39748 (issue: #39366)

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