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Elasticsearch version 8.2.0

Known issues

Parsing a request when the last element in an array is filtered out (for instance using _source_includes) fails. This is due to a bug in Jackson parser. Fixed in Elasticsearch 8.6.1 (#91456)

Bug fixes

Aggregations

Don’t apply the rewrite-as-range optimization if field is multivalued #84535 (issue: #82903)
Fix AdaptingAggregator toString method #86042
Fix: nested top metrics sort on keyword field #85058
Fix: use the correct field name when reading data from multi fields #84752

Analysis

Add tests for min_hash configuration and fix settings names #84753 (issue: #84578)

Authorization

Add delete privilege to kibana_system for APM #85085
Ensure API key can only see itself with QueryApiKey API #84859
Fix ownership of refresh tokens #85010
Grant kibana_system role read access to APM data streams #85744
Handle role descriptor retrieval for internal users #85049
Ignore app priv failures when resolving superuser #85519

EQL

Clean any used memory by the sequence matcher and circuit breaker used bytes in case of exception #84451

Engine

Increase store ref before snapshotting index commit #84776

Geo

Fix fields wildcard support to vector tile search API #85595 (issue: #85592)

Highlighting

Fix wildcard highlighting on match_only_text #85500 (issue: #85493)

ILM+SLM

Fix Stacktraces Taking Memory in ILM Error Step Serialization #84266
Invoke initial AsyncActionStep for newly created indices #84541 (issue: #77269)
Retry clean and create snapshot if it already exists #83694 #84829 (issue: #83694)
Skip the shrink step if the number of shards of the shrunk index is the same with the original #84434 (issue: #80180)

Indices APIs

Remove existing indices/datastreams/aliases before simulating index template #84675 (issue: #84256)

Infra/Core

Fix NullPointerException in SystemIndexMetadataUpgradeService hidden alias handling #84780 (issue: #81411)
Prevent ThreadContext header leak when sending response #68649 (issue: #68278)
Relax data path deprecations from critical to warn #85952
Require and preserve content type for filtered rest requests #84914 (issue: #84784)
Return empty version instead of blowing up if we cannot find it #85244
Validate index format agreement for system index descriptors #85173
Wrap thread creation in doPrivileged call #85180

Infra/Plugins

Strengthen elasticsearch plugin version check #85340 (issue: #85336)

Infra/REST API

Correctly return _type field for documents in V7 compatiblity mode #84873 (issue: #84173)

Ingest

Mark GeoIpDownloaderTask as completed after cancellation #84028
CompoundProcessor should also catch exceptions when executing a processor #84838 (issue: #84781)

License

Fix license downgrade warnings for API Keys and Tokens #85276 (issue: #75271)

Machine Learning

Allow retrieving boolean fields from _source in DFA jobs #85672
Avoid multiple queued quantiles documents in renormalizer #85555 (issue: #85539)
Disallow new trained model deployments when nodes are different versions #85465
Do not fetch source when finding index of last state docs #85334
Ensure that inference index primary shards are available before attempting to load model #85569
Fix Kibana date format and similar overrides in text structure endpoint #84967
Fix race condition when stopping a recently relocated datafeed #84636
Fix serialisation of text embedding updates #85863
Fixes for multi-line start patterns in text structure endpoint #85066
Fixes to making old ML indices hidden #85383
Reallocate model deployments on node shutdown events #85310
Retry datafeed searches on skipped CCS clusters #84052 (issue: #83838)
Return all Datafeeds with GET Anomaly Detector #84759

Mapping

Do not fail on duplicated content field filters #85382
Runtime fields core-with-mapped tests support tsdb #83577

Packaging

Remove use of Cloudflare zlib #84680

Rollup

Add support for comma delimited index patterns to rollup job configuration #47041 (issue: #45591)

SQL

Add range checks to interval multiplication operation #83478 (issue: #83336)
Avoid empty last pages for GROUP BY queries when possible #84356 (issue: #75528)
Fix SQLCompatIT.testCursorFromOldNodeFailsOnNewNode #85531 (issue: #85520)
Fix issues with format=txt when paging through result sets and in mixed node environments #83833 (issues: #83581, #83788)
Improve ROUND and TRUNCATE to better manage Long values and big Doubles #85106 (issues: #85105, #49391)
Use exact attributes for script templates from scalar functions #84813 (issue: #80551)
RANDOM(<expr>) always evaluates to NULL if <expr> is NULL #84632 (issue: #84627)

Search

Fix point visitor in DiskUsage API #84909
Fix skip caching factor with indices.queries.cache.all_segments #85510
Increase store ref before analyzing disk usage #84774
Limit concurrent shard requests in disk usage API #84900 (issue: #84779)
Rewrite match_all inside must_not #85999
DotExpandingXContentParser to expose the original token location #84970
TransportBroadcastAction should always set response for each shard #84926

Security

Authentication.token now uses version from the existing authentication #85978
Ensure tokens represent effective user’s identity in all cases #84263

Snapshot/Restore

Don’t fail if there is no symlink for AWS Web Identity Token #84697
Expose proxy settings for GCS repositories #85785 (issue: #84569)
Fix atomic writes in HDFS #85210
Fix leaking listeners bug on frozen tier #85239
Fix snapshot status messages on node-left #85021
Ignore frozen shared cache file during data folder upgrades #85638 (issue: #85603)
[s3-repository] Lookup AWS Region for STS Client from STS endpoint #84585 (issue: #83826)

Stats

Discard intermediate results upon cancellation for stats endpoints #82685 (issue: #82337)

Transform

Correctly validate permissions when retention policy is configured #85413 (issue: #85409)

Watcher

Avoiding watcher validation errors when a data stream points to more than one index #85507 (issue: #85508)
Log at WARN level for Watcher cluster state validation errors #85632
No longer require master node to install Watcher templates #85287 (issue: #85043)

Enhancements

Aggregations

Aggs: no filter-by-filter if _doc_count field #84427 (issue: #84048)
Extract agg bounds from queries in FILTER #83902
Give Lucene more opportunities to enable the filter-by-filter optimization #85322
Improve performance of date_histogram when date histogram is in a BoostingQuery #83751 (issues: #82384, #75542)

Allocation

Make allocation explanations more actionable #83983
Use static empty store files metadata #84034

Audit

User Profile - Audit security config change for profile APIs #84785

Authentication

Adds domain information to authentication object #82639
Improve BWC for persisted authentication headers #83913 (issue: #83567)
Warn on SAML attributes with special attribute names #85248 (issue: #48613)

Authorization

Add elastic/enterprise-search-server service account #83325
Add index privileges for logs-enterprise_search.api-default to the enterprise-search-server service account #84965
Add indices permissions to Enterprise Search service account #85726
Note restricted indices in access denied message #85013
Security global privilege for updating profile data of applications #83728
[Osquery] Extend kibana_system role with an access to osquery_manager indices #84279

CRUD

Speed up Reading RetentionLeases from the Wire #85159

Cluster Coordination

Avoid deserializing cluster states on master #58416
Improve logging for connect-back failures #84915
Remove intermediate map from master task execution #84406
Reuse JoinTaskExecutor #85325
Speed up MetadataStateFormat Writes #85138

Data streams

Speed up DatastreamTimestampFieldMapper#postParse #85270

Discovery-Plugins

Support IMDSv2 for EC2 Discovery #84410 (issue: #80398)

Distributed

Add elasticsearch health API #83119

Geo

Add geohex_grid aggregation to vector tiles API #84553
Added buffer pixels to vector tile spec parsing #84710 (issue: #84492)
Normalise polygons only when necessary #84229 (issue: #35349)
Support GeoJSON for geo_point #85120

Health

Fix naming in health indicators #83587
ILM/SLM health indicator services #83440
Introduce dedicated interface for health indicator details #83417
Repository integrity health indicator services #83445
Shards allocation health indicator services #83513

ILM+SLM

Cache ILM policy name on IndexMetadata #83603 (issue: #83582)
GET _index_template and GET _component_template request support query parameter flat_settings #83297
Make rollover cancellable #81763 #84584 (issue: #81763)
Rollover add max_primary_shard_docs condition #80981
Speed up ILM cluster task execution #85405 (issue: #82708)

Indices APIs

Batch add index block cluster state updates #84374
Batch close-indices cluster state updates #84259
Batch open-indices cluster state updates #83760
Remove LegacyCTRAL from TransportRolloverAction #84166

Infra/Core

Add support for negtive epoch timestamps #80208 (issues: #79135, #72123, #40983)
Allow yaml values for dynamic node settings #85186 (issue: #65577)
Improve XContent Array Parser #84477
Optimize ImmutableOpenMap.Builder #85184
Provide system attribute when resolving system indices #85042 (issue: #82671)
Remove Lucene split packages #82132 (issue: #81981)
Simplify reading a list and converting it to a map from stream #84183
Speed up CompressedXContent Serialization #84802
Update readMap to avoid resizing map during reading #84045

Infra/Plugins

Warn on slow signature verification #84766 (issue: #80480)

Infra/Scripting

Script: Fields API for Dense Vector #83550

Ingest

Do not throw exceptions when resolving paths in ingest documents #84659
RemoveProcessor updated to support fieldsToKeep #83665

Machine Learning

Add ML memory stats API #83802
Add support for RoBERTa and BART NLP models #84777
Add throughput stats for Trained Model Deployments #84628
Improve zero_shot_classification tokenization performance #84988 (issue: #84820)

Mapping

Check the utf8 length of keyword field is not bigger than 32766 in ES, rather than in Lucene. #83738 (issue: #80865)
Make FieldMapper.Param Cheaper to Construct #85191
Terms enum support for doc value only keyword fields #83482 (issue: #83451)

Network

Use Throttling Netty Write Handler on HTTP Path #84751

Query Languages

Add unsigned_long type support #65145 (issue: #63312)

Recovery

Improve failure logging in recovery-from-snapshot #84910

Reindex

Use SecureString for reindex from remote password #85091

SQL

Add leniency option to SQL CLI #83795 (issue: #67436)
Forward warning headers to JDBC driver #84499
List data streams as VIEWs #85168 (issue: #83449)
PIT for GROUP BY and PIVOT queries #84605 (issue: #84349)
Replace scroll cursors with point-in-time and search_after #83381 (issues: #61873, #80523)

Search

Add filtering to fieldcaps endpoint #83636 (issue: #82966)
Group field caps response by index mapping hash #83494 (issues: #78665, #82879)
Integrate filtering support for ANN #84734 (issue: #81788)
Speed up merging field-caps response #83704

Security

Bind host all instead of just site when needed #83145
Fleet: Add a new mapping for .fleet-actions-results action_input_type field #84316
Update X509Certificate principal methods #85163 (issue: #81008)
User Profile - Add APIs for enable/disable profile #84548
User Profile - Add rest spec files and tests #83307
User Profile - More REST spec, tests, API docs #84597
User Profile - Update APIs to work with domain #83570
User Profile - Update xpack usage output for domains #84747
User Profile - capture domain when creating API keys and tokens #84547
User Profile: Add feature flag #83347
User Profile: Add initial search profile API #83191
User Profile: handle racing on creating new profile #84208

TSDB

TSDB: Expand _id on version conflict #84957
TSDB: Reject the nested object fields that are configured time_series_dimension #83920
TSDB: routingPath object type check improvement #83310
TSDB: shrink _id inverted index #85008

Watcher

Add list of allowed domains for Watcher email action #84894 (issue: #84739)

New features

Aggregations

New random_sampler aggregation for sampling documents in aggregations #84363

Authentication

Add JWT realm support for JWT validation #83155
Add smoke test for JWT realm wiring #84249
Support mail, name, and dn claims in JWT realms #84907

Authorization

API Key APIs with Security Domain #84704

Health

Add Health Indicator Plugin #83205
Adding impacts block to the health info API response #84899 (issue: #84773)

Indices APIs

Adding cat api for component template #71274 (issue: #68941)

Infra/Core

Introduce an unauthenticated endpoint for readiness checks #84375 (issue: #81168)

Machine Learning

Adds new change_point pipeline aggregation #83428

Search

Introduce lookup runtime fields #82385
Resolve wildcards in disk usage API #84832

TSDB

TSDB: Support GET and DELETE and doc versioning #82633

Upgrades

Infra/Core

Upgrade jackson for x-content to 2.13.2 #84905

Ingest

Bump commons-compress to 1.21 #85581

Network

Upgrade Netty to 4.1.74 #84562

Packaging

Upgrade to JDK 18.0.0+36 #85376 (issue: #85357)

Search

Upgrade to lucene 9.1.0-snapshot-5b522487ba8 #85025

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https://www.elastic.co/guide/en/elasticsearch/reference/8.17/release-notes-8.2.0.html