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Elasticsearch version 7.5.0

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Elasticsearch version 7.5.0

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Also see Breaking changes in 7.5.

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.
Stop all transforms during a rolling upgrade to 7.5. If a transform is running during upgrade, the transform audit index might disappear. (issue: #49730)
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.

Breaking changes

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Search

Add support for aliases in queries on _index. #46640 (issues: #23306, #34089)

Deprecations

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Aggregations

Deprecate the "index.max_adjacency_matrix_filters" setting #46394 (issue: #46324)

Allocation

Deprecate include_relocations setting #47443 (issue: #46079)

Mapping

Deprecate _field_names disabling #42854 (issue: #27239)

Search

Reject regexp queries on the _index field. #46945 (issues: #34089, #46640)

New features

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Features/ILM+SLM

Add API to execute SLM retention on-demand #47405 (issues: #43663, #46508)
Add retention to Snapshot Lifecycle Management #46407 (issues: #38461, #43663, #45362)

Features/Ingest

Add enrich processor #48039 (issue: #32789)

Machine Learning

Implement evaluation API for multiclass classification problem #47126 (issue: #46735)
Implement new analysis type: classification #46537 (issue: #46735)
Add audit messages for Data Frame Analytics #46521 (issue: #184)
Implement DataFrameAnalyticsAuditMessage and DataFrameAnalyticsAuditor #45967

SQL

SQL: Implement DATEDIFF function #47920 (issue: #47919)
SQL: Implement DATEADD function #47747 (issue: #47746)
SQL: Implement DATE_PART function #47206 (issue: #46372)
SQL: Add alias DATETRUNC to DATE_TRUNC function #47173 (issue: #46473)
SQL: Add PIVOT support #46489
SQL: Implement DATE_TRUNC function #46473 (issue: #46319)

Enhancements

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Aggregations

Adjacency_matrix aggregation memory usage optimisation. #46257 (issue: #46212)
Support geotile_grid aggregation in composite agg sources #45810 (issue: #40568)

Allocation

Do not cancel ongoing recovery for noop copy on broken node #48265 (issue: #47974)
Shrink should not touch max_retries #47719
Re-fetch shard info of primary when new node joins #47035 (issues: #42518, #46959)
Sequence number based replica allocation #46959 (issue: #46318)

Authorization

Add support to retrieve all API keys if user has privilege #47274 (issue: #46887)
Add create_doc index privilege #45806
Reducing privileges needed by built-in beats_admin role #41586

CCR

Add Pause/Resume Auto-Follower APIs to High Level REST Client #47989 (issue: #47510)
Add Pause/Resume Auto Follower APIs #47510 (issue: #46665)

CRUD

Allow optype CREATE for append-only indexing operations #47169

Cluster Coordination

Warn on slow metadata persistence #47005
Improve LeaderCheck rejection messages #46998

Engine

Do not warm up searcher in engine constructor #48605 (issue: #47186)
Refresh should not acquire readLock #48414 (issue: #47186)
Avoid unneeded refresh with concurrent realtime gets #47895
sync before trimUnreferencedReaders to improve index preformance #47790 (issues: #46201, #46203)
Limit number of retaining translog files for peer recovery #47414
Remove isRecovering method from Engine #47039

Features/ILM+SLM

Separate SLM stop/start/status API from ILM #47710 (issue: #43663)
Set default SLM retention invocation time #47604 (issue: #43663)
ILM: Skip rolling indexes that are already rolled #47324 (issue: #44175)
Add support for POST requests to SLM Execute API #47061
Wait for snapshot completion in SLM snapshot invocation #47051 (issues: #38461, #43663)
Add node setting for disabling SLM #46794 (issue: #38461)
ILM: parse origination date from index name #46755 (issues: #42449, #46561)
[ILM] Add date setting to calculate index age #46561 (issue: #42449)

Features/Ingest

Add the ability to require an ingest pipeline #46847

Features/Java High Level REST Client

add function submitDeleteByQueryTask in class RestHighLevelClient #46833
return Cancellable in RestHighLevelClient #45688 (issue: #44802)

Features/Java Low Level REST Client

Add cloudId builder to the HLRC #47868
Add support for cancelling async requests in low-level REST client #45379 (issues: #43332, #44802)

Features/Monitoring

Remove hard coded version_created in default monitoring alerts #47744

Infra/Circuit Breakers

Emit log message when parent circuit breaker trips #47000
Fix G1 GC default IHOP #46169

Infra/Core

Introduce system JVM options #48252 (issue: #48222)
Set start of the week to Monday for root locale #43652 (issues: #41670, #42588, #43275)

Infra/Packaging

Package the JDK into jdk.app on macOS #48765
Move ES_TMPDIR substitution into jvm options parser #47189 (issue: #47133)
Clarify missing java error message #46160 (issue: #44139)

Infra/Scripting

Add explanations to script score queries #46693

Infra/Settings

Do not reference values for filtered settings #48066
Allow setting validation against arbitrary types #47264 (issue: #25560)
Clarify error message on keystore write permissions #46321
Add more meaningful keystore version mismatch errors #46291 (issue: #44624)

Machine Learning

Throw an exception when memory usage estimation endpoint encounters empty data frame. #49143 (issue: #49140)
Change format of MulticlassConfusionMatrix result to be more self-explanatory #48174 (issue: #46735)
Make num_top_classes parameter’s default value equal to 2 #48119 (issue: #46735)
[ML] Add option to stop datafeed that finds no data #47922
Allow integer types for classification’s dependent variable #47902 (issue: #46735)
[ML] Add lazy assignment job config option #47726
[ML] Additional outlier detection parameters #47600
[ML] More accurate job memory overhead #47516
[ML] Throttle the delete-by-query of expired results #47177 (issues: #47003, #47103)

Mapping

Add migration tool checks for _field_names disabling #46972 (issues: #42854, #46681)

Network

Introduce simple remote connection strategy #47480
Enhanced logging when transport is misconfigured to talk to HTTP port #45964 (issue: #32688)

Recovery

Do not send recovery requests with CancellableThreads #46287 (issue: #46178)

SQL

SQL: make date/datetime and interval types compatible in conditional functions #47595 (issue: #46674)
SQL: use calendar interval of 1y instead of fixed interval for grouping by YEAR and HISTOGRAMs #47558 (issue: #40162)
SQL: Support queries with HAVING over SELECT #46709 (issue: #37051)
SQL: Add support for shape type #46464 (issues: #43644, #46412)

Search

Remove response search phase from ExpandSearchPhase #48401
Add builder for distance_feature to QueryBuilders #47846 (issue: #47767)
Fold InitialSearchPhase into AbstractSearchAsyncAction #47182
max_children exist only in top level nested sort #46731
First round of optimizations for vector functions. #46294 (issues: #45390, #45936, #46103, #46155, #46190, #46202)
Throw exception in scroll requests using from #46087 (issues: #26235, #44493, #9373)

Snapshot/Restore

Track Repository Gen. in BlobStoreRepository #48944 (issues: #38941, #47520, #47834, #49048)
Resume partial download from S3 on connection drop #46589
More Efficient Ordering of Shard Upload Execution #42791

Transform

[ML][Transforms] allow executor to call start on started task #46347
[ML-DataFrame] improve error message for timeout case in stop #46131 (issue: #45610)
[ML][Data Frame] add support for wait_for_checkpoint flag on _stop API #45469 (issue: #45293)

Bug fixes

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Aggregations

Fix ignoring missing values in min/max aggregations #48970 (issue: #48905)
DocValueFormat implementation for date range fields #47472 (issues: #47323, #47469)

Allocation

Auto-expand replicated closed indices #48973
Handle negative free disk space in deciders #48392 (issue: #48380)
Dangling indices strip aliases #47581
Cancel recoveries even if all shards assigned #46520
Fail allocation of new primaries in empty cluster #43284 (issue: #41073)

Analysis

Reset Token position on reuse in predicate_token_filter #47424 (issue: #47197)

Audit

Audit log filter and marker #45456 (issue: #47251)

Authentication

Add owner flag parameter to the rest spec #48500 (issue: #48499)
Add populate_user_metadata in OIDC realm #48357 (issue: #48217)
Remove unnecessary details logged for OIDC #48271
Fix AD realm additional metadata #47179 (issue: #45848)
Fallback to realm authc if ApiKey fails #46538
PKI realm accept only verified certificates #45590

Authorization

Fix security origin for TokenService#findActiveTokensFor… #47418 (issue: #47151)
Use should clause instead of filter when querying native privileges #47019
Do not rewrite aliases on remove-index from aliases requests #46989
Validate index and cluster privilege names when creating a role #46361 (issue: #29703)
Validate query field when creating roles #46275 (issue: #34252)

CCR

CCR should auto-retry rejected execution exceptions #49213
Do not auto-follow closed indices #47721 (issue: #47582)
Relax maxSeqNoOfUpdates assertion in FollowingEngine #47188 (issue: #47137)
Handle lower retaining seqno retention lease error #46420 (issues: #46013, #46416)

CRUD

Close query cache on index service creation failure #48230 (issue: #48186)
Use optype CREATE for single auto-id index requests #47353
Ignore replication for noop updates #46458 (issues: #41065, #44603, #46366)

Client

Correct default refresh policy for security APIs #46896

Cluster Coordination

Ignore metadata of deleted indices at start #48918
Omit writing index metadata for non-replicated closed indices on data-only node #47285 (issue: #47276)
Assert no exceptions during state application #47090 (issue: #47038)
Remove trailing comma from nodes lists #46484

Distributed

Closed shard should never open new engine #47186 (issues: #45263, #47060)
Fix false positive out of sync warning in synced-flush #46576 (issues: #28464, #30244)
Suppress warning logs from background sync on relocated primary #46247 (issues: #40800, #42241)

Engine

Greedily advance safe commit on new global checkpoint #48559 (issue: #48532)

Features/ILM+SLM

Don’t halt policy execution on policy trigger exception #49128
Don’t schedule SLM jobs when services have been stopped #48658 (issue: #47749)
Ensure SLM stats does not block an in-place upgrade from 7.4 #48367
Ensure SLM stats does not block an in-place upgrade from 7.4 #48361
Add SLM support to xpack usage and info APIs #48096 (issue: #43663)
Change policy_id to list type in slm.get_lifecycle #47766 (issue: #47765)
Throw error retrieving non-existent SLM policy #47679 (issue: #47664)
Handle partial failure retrieving segments in SegmentCountStep #46556
Fixes for API specification #46522

Features/Indices APIs

Fix Rollover error when alias has closed indices #47148 (issue: #47146)

Features/Ingest

Do not wrap ingest processor exception with IAE #48816 (issue: #48810)
Introduce dedicated ingest processor exception #48810 (issue: #48803)
Allow dropping documents with auto-generated ID #46773 (issue: #46678)
Expose cache setting in UserAgentPlugin #46533

Features/Java High Level REST Client

fix incorrect comparison #48208
Fix ILM HLRC Javadoc→Documentation links #48083
Change HLRC count request to accept a QueryBuilder #46904 (issue: #46829)
[HLRC] Send min_score as query string parameter to the count API #46829 (issue: #46474)
HLRC multisearchTemplate forgot params #46492 (issue: #46488)
Added fields for MultiTermVectors (#42232) #42877 (issue: #42232)

Features/Java Low Level REST Client

Update http-core and http-client dependencies #46549 (issues: #45379, #45577, #45808)

Features/Monitoring

[Monitoring] Add new cluster privilege now necessary for the stack monitoring ui #47871
Validating monitoring hosts setting while parsing #47246 (issue: #47125)

Features/Watcher

Fix class used to initialize logger in Watcher #46467
Fix wrong URL encoding in watcher HTTP client #45894 (issue: #44970)
Prevent deadlock by using separate schedulers #48697 (issues: #41451, #47599)
Fix cluster alert for watcher/monitoring IndexOutOfBoundsExcep… #45308 (issue: #43184)

Geo

Geo: implement proper handling of out of bounds geo points #47734 (issue: #43916)
Geo: Fixes indexing of linestrings that go around the globe #47471 (issues: #43826, #43837)
Provide better error when updating geo_shape field mapper settings #47281 (issue: #47006)
Geo: fix indexing of west to east linestrings crossing the antimeridian #46601 (issue: #43775)
Reset queryGeometry in ShapeQueryTests #45974 (issue: #45628)

Highlighting

Fix highlighting of overlapping terms in the unified highlighter #47227
Fix highlighting for script_score query #46507 (issue: #46471)

Infra/Core

Don’t drop user’s MaxDirectMemorySize flag on jdk8/windows #48657 (issues: #44174, #48365)
Warn when MaxDirectMemorySize may be incorrect (Windows/JDK8 only issue) #48365 (issue: #47384)
Support optional parsers in any order with DateMathParser and roundup #46654 (issue: #45284)

Infra/Logging

SearchSlowLog uses a non thread-safe object to escape json #48363 (issues: #44642, #48358)

Infra/Scripting

Drop stored scripts with the old style-id #48078 (issue: #47593)

Machine Learning

[ML] Fixes for stop datafeed edge cases #49191 (issues: #43670, #48931)
[ML] Avoid NPE when node load is calculated on job assignment #49186 (issue: #49150)
Do not throw exceptions resulting from persisting datafeed timing stats. #49044 (issue: #49032)
[ML] Deduplicate multi-fields for data frame analytics #48799 (issues: #48756, #48770)
[ML] Prevent fetching multi-field from source #48770 (issue: #48756)
[ML] Fix detection of syslog-like timestamp in find_file_structure #47970
Fix serialization of evaluation response. #47557
[ML] Reinstate ML daily maintenance actions #47103 (issue: #47003)
[ML] fix two datafeed flush lockup bugs #46982

Network

Fix es.http.cname_in_publish_address Deprecation Logging #47451 (issue: #47436)

Recovery

Ignore Lucene index in peer recovery if translog corrupted #49114

Reindex

Fix issues with serializing BulkByScrollResponse #45357

SQL

SQL: Fix issue with mins & hours for DATEDIFF #49252
SQL: Fix issue with negative literels and parentheses #48113 (issue: #48009)
SQL: add "format" for "full" date range queries #48073 (issue: #48033)
SQL: Fix arg verification for DateAddProcessor #48041
SQL: Fix Nullability of DATEADD #47921
SQL: Allow whitespaces in escape patterns #47577 (issue: #47401)
SQL: fix multi full-text functions usage with aggregate functions #47444 (issue: #47365)
SQL: Check case where the pivot limit is reached #47121 (issue: #47002)
SQL: Properly handle indices with no/empty mapping #46775 (issue: #46757)
SQL: improve ResultSet behavior when no rows are available #46753 (issue: #46750)
SQL: use the correct data type for types conversion #46574 (issue: #46090)
SQL: Fix issue with common type resolution #46565 (issue: #46551)
SQL: fix scripting for grouped by datetime functions #46421 (issue: #40241)
SQL: Use null schema response #46386 (issue: #46381)
SQL: Fix issue with IIF function when condition folds #46290 (issue: #46268)
SQL: Fix issue with DataType for CASE with NULL #46173 (issue: #46032)
SQL: Failing Group By queries due to different ExpressionIds #43072 (issues: #33361, #34543, #36074, #37044, #40001, #40240, #41159, #42041, #46316)
SQL: wrong number of values for columns #42122

Search

Lucene#asSequentialBits gets the leadCost backwards. #48335
Ensure that we don’t call listener twice when detecting a partial failures in _search #47694
Fix alias field resolution in match query #47369
Multi-get requests should wait for search active #46283 (issue: #27500)
Resolve the incorrect scroll_current when delete or close index #45226
Don’t apply the plugin’s reader wrapper in can_match phase #47816 (issue: #46817)

Security

Remove uniqueness constraint for API key name and make it optional #47549 (issue: #46646)
Initialize document subset bit set cache used for DLS #46211 (issue: #45147)

Snapshot/Restore

Fix RepoCleanup not Removed on Master-Failover #49217
Make FsBlobContainer Listing Resilient to Concurrent Modifications #49142 (issue: #37581)
Fix SnapshotShardStatus Reporting for Failed Shard #48556 (issue: #48526)
Cleanup Concurrent RepositoryData Loading #48329 (issue: #48122)
Fix Bug in Azure Repo Exception Handling #47968
Make loadShardSnapshot Exceptions Consistent #47728 (issue: #47507)
Fix Snapshot Corruption in Edge Case #47552 (issues: #46250, #47550)
Fix Bug in Snapshot Status Response Timestamps #46919 (issue: #46913)
Normalize Blob Store Repo Paths #46869 (issue: #41814)
GCS deleteBlobsIgnoringIfNotExists should catch StorageException #46832 (issue: #46772)
Execute SnapshotsService Error Callback on Generic Thread #46277
Make Snapshot Logic Write Metadata after Segments #45689 (issue: #41581)

Store

Allow truncation of clean translog #47866

Task Management

Fix .tasks index strict mapping: parent_id should be parent_task_id #48393

Transform

[Transform] do not fail checkpoint creation due to global checkpoint mismatch #48423 (issue: #48379)
[7.5][Transform] prevent assignment if any node is older than 7.4 #48055 (issue: #48019)
[Transform] prevent assignment to nodes older than 7.4 #48044 (issue: #48019)
[ML][Transforms] fix bwc serialization with 7.3 #48021
[ML][Transforms] signal listener early on task _stop failure #47954
[ML][Transform] Use field_caps API for mapping deduction #46703 (issue: #46694)
[ML-DataFrame] Fix off-by-one error in checkpoint operations_behind #46235