Elasticsearch version 8.10.0
- Elasticsearch version 8.10.0

Elasticsearch version 8.10.0

Also see Breaking changes in 8.10.

Known issues

Snapshot-based downgrades

The snapshot repository format changed in a manner that prevents earlier versions of Elasticsearch from reading the repository contents if it contains snapshots from this version and the last cluster to write to this repository was in the 8.10 series. This will prevent you from reverting an upgrade to the 8.10 series by restoring a snapshot taken before the upgrade.

Snapshot repositories written by clusters running versions 8.11.0 and later are compatible with all earlier versions. Moreover, clusters running version 8.11.0 or later will also automatically repair the repository format the first time they write to the repository to take or delete a snapshot, making it so that all earlier versions can read its contents again.

If you wish to downgrade to a version prior to 8.9.0, take or delete a snapshot using a cluster running version 8.11.0 or later to repair the repository format first. If you cannot repair the repository in this way, first delete all the snapshots in the repository taken with version 8.9.0 or later. To do this will require using a cluster running version 8.10.0 or later.

If you wish to downgrade to a version in the 8.9 series, you must take or delete a snapshot using a cluster running version 8.11.0 or later to repair the repository format first. If you cannot repair the repository in this way, first delete all the snapshots in the repository taken with version 8.10.0 or later using a cluster running version 8.10.4.
High Memory Pressure due to a GC JVM setting change

This version of Elasticsearch is bundled with JDK 20. In JDK 20 Preventive GC is disabled by default. This may lead to increased memory pressure and an increased number of CircuitBreakerExceptions when retrieving large documents under some load patterns. (issue: #99592)

If this change affects your use of Elasticsearch, consider re-enabling the previous behaviour by adding the JVM arguments -XX:+UnlockDiagnosticVMOptions -XX:+G1UsePreventiveGC (reference: JDK 20 release notes). It is important to note that this workaround is temporary and works only with JDK 20, which is bundled with Elasticsearch up to version 8.10.2 inclusive. Successive versions are bundling JDK 21+, where this setting has been removed. Specifying those JVM arguments will prevent the JVM (and therefore Elasticsearch Nodes) from starting.

Breaking changes

Analysis

Change pre-configured and cached analyzer components to use IndexVersion instead of Version #97319

Geo

Remove the unused executor builder for vector tile plugin #96577

Bug fixes

Aggregations

Cardinality nested in time series doc values bug #99007
Skip segment for MatchNoDocsQuery filters #98295 (issue: #94637)

Allocation

Do not assign ignored shards #98265
Remove exception wrapping in BatchedRerouteService #97224

Application

[Profiling] Abort index creation on outdated index #98864
[Profiling] Consider static settings in status #97890
[Profiling] Mark executables without a name #98884

CRUD

Add missing sync on indicesThatCannotBeCreated #97869

Cluster Coordination

Fix cluster bootstrap warning for single-node discovery #96895 (issue: #96874)
Fix election scheduling after discovery outage #98420
Improve reliability of elections with message delays #98354 (issue: #97909)
Make TransportAddVotingConfigExclusionsAction retryable #98386
Release master service task on timeout #97711

Data streams

Avoid lifecycle NPE in the data stream lifecycle usage API #98260

Distributed

Avoid transport_worker thread in TransportBroadcastAction #98001
Avoid transport_worker thread in TransportBroadcastByNodeAction #97920 (issue: #97914)
Fork response reading in TransportNodesAction #97899

Downsampling

Copy “index.lifecycle.name” for ILM managed indices #97110 (issue: #96732)
Downsampling: copy the _tier_preference setting #96982 (issue: #96733)

EQL

Fix async missing events #97718 (issue: #97644)

Geo

Fix how Maps#flatten handle map values inside a list #98828
Fix mvt error when returning partial results #98765 (issue: #98730)

Health

_health_report SLM indicator should use the policy ID (not the name) #99111

Indices APIs

Ensure frozen indices have correct tier preference #97967

Infra/REST API

Fix possible NPE when transportversion is null in MainResponse #97203

Ingest Node

Revert “Add mappings for enrich fields” #98683

Machine Learning

Avoid risk of OOM in datafeeds when memory is constrained #98324 (issue: #89769)
Detect infinite loop in the WordPiece tokenizer #98206
Fix to stop aggregatable subobjects from being considered multi-fields, to support "subobjects": false in data frame analytics #97705 (issue: #88605)
Fix weird change_point bug where all data values are equivalent #97588
The model loading service should not notify listeners in a sync block #97142

Mapping

Fix fields API with subobjects: false #97092 (issue: #96700)

Network

Fork remote-cluster response handling #97922

Fork CCS remote-cluster responses #98124 (issue: #97997)
Fork CCS search-shards handling #98209
Improve test coverage for CCS search cancellation and fix response bugs #97029
Make terminate_after early termination friendly #97540 (issue: #97269)
Track max_score in collapse when requested #97703 (issue: #97653)

Security

Fix NPE when GetUser with profile uid before profile index exists #98961

Snapshot/Restore

Fix BlobCacheBufferedIndexInput large read after clone #98970

TSDB

Mapped field types searchable with doc values #97724

Transform

Fix transform incorrectly calculating date bucket on updating old data #97401 (issue: #97101)

Watcher

Changing watcher to disable cookies in shared http client #97591

Deprecations

Authorization

Mark apm_user for removal in a future major release #87674

Enhancements

Aggregations

Improve error message when aggregation doesn’t support counter field #93545
Set default index mode for TimeSeries to null #98808 (issue: #97429)

Allocation

Add node.roles to cat allocation API #96994

Application

[Profiling] Add initial support for upgrades #97380
[Profiling] Support index migrations #97773

Authentication

Avoid double get #98067 (issue: #97928)
Give all acces to .slo-observability.* indice to kibana user #97539
Refresh tokens without search #97395

Authorization

Add “operator” field to authenticate response #97234
Read operator privs enabled from Env settings #98246
[Fleet] Allow kibana_system to put datastream lifecycle #97732

Data streams

Install data stream template for Kibana reporting #97765

Downsampling

Change MetricFieldProducer#metrics field type from list to array #97344
Improve iterating over many field producers during downsample operation #97281
Run downsampling using persistent tasks #97557 (issue: #93582)

EQL

EQL to use only the necessary fields in the internal field_caps calls #98987

Engine

Fix edge case for active flag for flush on idle #97332 (issue: #97154)

Health

Adding special logic to the disk health check for search-only nodes #98508
Health API Periodic Logging #96772

ILM+SLM

Separating SLM from ILM #98184

Infra/Core

Infrastructure to report upon document parsing #97961

Infra/Node Lifecycle

Check ILM status before reporting node migration STALLED #98367 (issue: #89486)

Infra/Plugins

Adding ApiFilteringActionFilter #97985

Infra/REST API

Enable Serverless API protections dynamically #97079
Make RestController pluggable #98187

Infra/Settings

Mark customer settings for serverless #98051

Ingest Node

Allow custom geo ip database files to be downloaded #97850

Network

Add request header size limit for RCS transport connections #98692

Add completion_time time field to async_search get and status response #97700 (issue: #88640)
Add setting for search parallelism #98455
Add support for concurrent collection when size is greater than zero #98425
Cross-cluster search provides details about search on each cluster #97731
Enable parallel collection in Dfs phase #97416
Exclude clusters from a cross-cluster search #97865
Improve MatchNoDocsQuery description #96069 (issue: #95741)
Improve exists query rewrite #97159
Improve match query rewrite #97208
Improve prefix query rewrite #97209
Improve wildcard query and terms query rewrite #97594
Introduce Synonyms Management API used for synonym and synonym_graph filters #97962 (issue: #38523)
Introduce a collector manager for PartialHitCountCollector #97550
Introduce a collector manager for QueryPhaseCollector #97410
Limit _terms_enum prefix size #97488 (issue: #96572)
Support minimum_should_match field for terms_set query #96082
Support type for simple query string #96717
Unwrap IOException in ContextIndexSearcher concurrent code-path #98459
Use a collector manager in DfsPhase Knn Search #96689
Use the Weight#matches mode for highlighting by default #96068
Wire QueryPhaseCollectorManager into the query phase #97726
Wire concurrent top docs collector managers when size is 0 #97755
ProfileCollectorManager to support child profile collectors #97387
cleanup some code NoriTokenizerFactory and KuromojiTokenizerFactory #92574

Security

Add an API for managing the settings of Security system indices #97630
Support getting active-only API keys via Get API keys API #98259 (issue: #97995)

Snapshot/Restore

Add Setting to optionally use mmap for shared cache IO #97581
Collect additional object store stats for S3 #98083
HDFS plugin add replication_factor param #94132

Store

Allow Lucene directory implementations to estimate their size #97822
Allow ByteSizeDirectory to expose their data set sizes #98085

TSDB

Add tsdb metrics builtin component template #97602
Include more downsampling status statistics #96930 (issue: #96760)
TimeSeriesIndexSearcher to offload to the provided executor #98414

Transform

Support boxplot aggregation in transform #96515

New features

Application

Enable Query Rules as technical preview #97466
[Enterprise Search] Add connectors indices and ent-search pipeline #97463

Data streams

Introduce downsampling configuration for data stream lifecycle #97041

Introduce executor for concurrent search #98204

Security

Beta release for API key based cross-cluster access #98307

Upgrades

Network

Upgrade Netty to 4.1.94.Final #97040