Elasticsearch release notes

Review the changes, fixes, and more in each version of Elasticsearch.

To check for security updates, go to Security announcements for the Elastic stack.

PUT _index_template/my-template
{
  "index_patterns": ["logs-test-*"],
  "data_stream": {},
  "template": {
    "data_stream_options": {
      "failure_store": {
        "enabled": true
      }
    }
  }
}

PUT _data_stream/logs-test-apache/_options
{
  "failure_store": {
    "enabled": "true"
  }
}

POST logs-test-apache::failures/_search

POST logs-*::failures/_search
POST logs-*,logs-*::failures/_search
POST *::failures/_search
POST _query
{
  "query": "FROM my_data_stream*::failures"
}

FROM test
| FORK
( WHERE content:"fox" )
( WHERE content:"dog" )
| SORT _fork

| id  | content   | _fork |
|-----|-----------|-------|
| 3   | brown fox | fork1 |
| 4   | white dog | fork2 |

Allocation:

• Accumulate compute() calls and iterations between convergences #126008 (issue: #100850)
• Add FailedShardEntry info to shard-failed task source string #125520 (issue: #102606)
• Add cache support in TransportGetAllocationStatsAction #124898 (issue: #110716)
• Add cancellation support in TransportGetAllocationStatsAction #127371 (issue: #123248)
• Allow balancing weights to be set per tier #126091
• Introduce AllocationBalancingRoundSummaryService #120957
• More efficient sort in tryRelocateShard #128063

Analysis:

• Synonyms API - Add refresh parameter to check synonyms index and reload analyzers #126935 (issue: #121441)

Authentication:

• Add Support for Providing a custom ServiceAccountTokenStore through SecurityExtensions #126612
• Implement SAML custom attributes support for Identity Provider #128176
• Permit at+jwt typ header value in jwt access tokens #126687 (issue: #119370)

Authorization:

• Add Microsoft Graph Delegated Authorization Realm Plugin #127910
• Check TooComplex exception for HasPrivileges body #128870
• Delegated authorization using Microsoft Graph (SDK) #128396
• Fix unsupported privileges error message during role and API key crea… #128858 (issue: #128132)
• Granting kibana_system reserved role access to "all" privileges to .adhoc.alerts* and .internal.adhoc.alerts* indices #127321
• [Security Solution] Add read index privileges to kibana_system role for Microsoft Defender integration indexes #126803

CCS:

• Check if index patterns conform to valid format before validation #122497

CRUD:

• Add IndexingPressureMonitor to monitor large indexing operations #126372
• Enhance memory accounting for document expansion and introduce max document size limit #123543

Codec:

• First step optimizing tsdb doc values codec merging #125403
• Use default Lucene postings format when index mode is standard. #128509

Data streams:

• Add ability to redirect ingestion failures on data streams to a failure store #126973
• Add index mode to get data stream API #122486
• Run TransportGetDataStreamLifecycleAction on local node #125214
• Run TransportGetDataStreamOptionsAction on local node #125213
• Run TransportGetDataStreamsAction on local node #122852
• Update ecs@mappings.json with new GenAI fields #129122
• [Failure store] Introduce dedicated failure store lifecycle configuration #127314
• [Failure store] Introduce default retention for failure indices #127573
• [apm-data] Enable 'date_detection' for all apm data streams #128913

Distributed:

• Account for time taken to write index buffers in IndexingMemoryController #126786

ES|QL:

• Add MATCH_PHRASE #127661
• Add Support for LIKE (LIST) #129170
• Add documents_found and values_loaded #125631
• Add suggested_cast #127139
• Add emit time to hash aggregation status #127988
• Add initial grammar and changes for FORK #121948
• Add initial grammar and planning for RRF (snapshot) #123396
• Add local optimizations for constant_keyword #127549
• Add optimization to purge join on null merge key #127583 (issue: #125577)
• Add support for LOOKUP JOIN on aliases #128519
• Add support for parameters in LIMIT command #128464
• Aggressive release of shard contexts #129454
• Allow lookup join on mixed numeric fields #128263
• Allow partial results in ES|QL #121942
• Avoid NamedWritable in block serialization #124394
• COMPLETION command grammar and logical plan #126319
• Calculate concurrent node limit #124901
• Change queries ID to be the same as the async #127472 (issue: #127187)
• Double parameter markers for identifiers #122459
• ESQL: Enhanced DATE_TRUNC with arbitrary intervals #120302 (issue: #120094)
• ES|QL - Add COMPLETION command as a tech preview feature #128948 (issue: #124405)
• ES|QL - Add match_phrase full text function (tech preview) #128925
• ES|QL - Allow full text functions to be used in STATS #125479 (issue: #125481)
• ES|QL cross-cluster querying is now generally available #130032
• ES|QL slow log #124094
• ES|QL: Support ::date in inline cast #123460 (issue: #116746)
• Emit ordinal output block for values aggregate #127201
• Fix sorting when aggregate_metric_double present #125191
• Heuristics to pick efficient partitioning #125739
• Implement runtime skip_unavailable=true #121240
• Include failures in partial response #124929
• Infer the score mode to use from the Lucene collector #125930
• Introduce AggregateMetricDoubleBlock #127299
• Introduce allow_partial_results setting in ES|QL #122890
• Introduce a pre-mapping logical plan processing step #121260
• Keep ordinals in conversion functions #125357
• List/get query API #124832 (issue: #124827)
• Log partial failures #129164
• Optimize ordinal inputs in Values aggregation #127849
• Pragma to load from stored fields #122891
• Push more ==s on text fields to lucene #126641
• Pushdown Lookup Join past Project #129503 (issue: #119082)
• Pushdown constructs doing case-insensitive regexes #128393 (issue: #127479)
• Pushdown for LIKE (LIST) #129557
• ROUND_TO function #128278
• Release FORK in tech preview #129606
• Remove page alignment in exchange sink #124610
• Render aggregate_metric_double #122660
• Report original_types #124913
• Report failures on partial results #124823
• Retry ES|QL node requests on shard level failures #120774
• Retry shard movements during ESQL query #126653
• Run coordinating can_match in field-caps #127734
• Skip unused STATS groups by adding a Top N BlockHash implementation #127148
• Specialize ags AddInput for each block type #127582
• Speed loading stored fields #127348
• Support partial results in CCS in ES|QL #122708
• Support subset of metrics in aggregate metric double #121805
• Take double parameter markers for identifiers out of snapshot #125690
• ToAggregateMetricDouble function #124595
• text == and text != pushdown #127355

Engine:

• Throttle indexing when disk IO throttling is disabled #129245
• Track & log when there is insufficient disk space available to execute merges #131711

Geo:

• Support explicit Z/M attributes using WKT geometry #125896 (issue: #123111)

Health:

• Add health indicator impact to HealthPeriodicLogger #122390

ILM+SLM:

• Add index.lifecycle.skip index-scoped setting to instruct ILM to skip processing specific indices #128736
• Batch ILM policy cluster state updates [#122917] #126529 (issue: #122917)
• Improve SLM Health Indicator to cover missing snapshot #121370
• Optimize usage calculation in ILM policies retrieval API #106953 (issue: #105773)
• Process ILM cluster state updates on another thread #123712
• Run TransportExplainLifecycleAction on local node #122885
• Run TransportGetLifecycleAction on local node #126002
• Run TransportGetStatusAction on local node #129367
• Truncate step_info and error reason in ILM execution state and history #125054 (issue: #124181)

IdentityProvider:

• Add "extension" attribute validation to IdP SPs #128805
• Add transport version support for IDP_CUSTOM_SAML_ATTRIBUTES_ADDED_8_19 #128798

Indices APIs:

• Add RemoveBlock API to allow DELETE /{index}/_block/{block} #129128
• Avoid creating known_fields for every check in Alias #124690
• Run TransportGetIndexAction on local node #125652
• Run TransportGetMappingsAction on local node #122921
• Run TransportGetSettingsAction on local node #126051
• Throw exception for unknown token in RestIndexPutAliasAction #124708
• Throw exception for unsupported values type in Alias #124737

Inference:

• Adding Google VertexAI chat completion integration #128105
• Adding Google VertexAI completion integration #128694
• [Inference API] Rename model_id prop to model in EIS sparse inference request body #122272

Infra/CLI:

• Use logs dir as working directory #124966

Infra/Core:

• Give Kibana user 'all' permissions for .entity_analytics.* indices #123588
• Improve support for bytecode patching signed jars #128613
• Permanently switch from Java SecurityManager to Entitlements. The Java SecurityManager has been deprecated since Java 17, and it is now completely disabled in Java 24. In order to retain an similar level of protection, Elasticsearch implemented its own protection mechanism, Entitlements. Starting with this version, Entitlements will permanently replace the Java SecurityManager. #125117

Infra/Metrics:

• Add thread pool utilization metric #120363
• Publish queue latency metrics from tracked thread pools #120488

Infra/Settings:

• Allow float settings to be configured with other settings as default #126751
• Allow passing several reserved state chunks in single process call #124574
• Ensure config reload on ..data symlink switch for CSI driver support #127628
• FileWatchingService shoudld not throw for missing file #126264

Ingest Node:

• Adding NormalizeForStreamProcessor #125699
• Run TransportEnrichStatsAction on local node #121256

Logs:

• Conditionally force sequential reading in LuceneSyntheticSourceChangesSnapshot #128473

Machine Learning:

• Add Custom inference service #127939
• Add Telemetry for models without adaptive allocations #129161
• Add ModelRegistryMetadata to Cluster State #121106
• Add none chunking strategy to disable automatic chunking for inference endpoints #129150
• Add recursive chunker #126866
• Added Mistral Chat Completion support to the Inference Plugin #128538
• Adding VoyageAI's v3.5 models #128241
• Adding common rerank options to Perform Inference API #125239 (issue: #111273)
• Adding elser default endpoint for EIS #122066
• Adding endpoint creation validation to ElasticInferenceService #117642
• Adding integration for VoyageAI embeddings and rerank models #122134
• Adding support for binary embedding type to Cohere service embedding type #120751
• Adding support for specifying embedding type to Jina AI service settings #121548
• Adding validation to ElasticsearchInternalService #123044
• Bedrock Cohere Task Settings Support #126493 (issue: #126156)
• ES|QL SAMPLE aggregation function #127629
• ES|QL change_point processing command #120998
• ES|QL random sampling #125570
• Expose input_type option at root level for text_embedding task type in Perform Inference API #122638 (issue: #117856)
• Improve exception for trained model deployment scale up timeout #128218
• Increment inference stats counter for shard bulk inference calls #129140
• Integrate OpenAi Chat Completion in SageMaker #127767
• Integrate with DeepSeek API #122218
• Limit the number of chunks for semantic text to prevent high memory usage #123150
• Make Adaptive Allocations Scale to Zero configurable and set default to 24h #128914
• Mark token pruning for sparse vector as GA #128854
• Move to the Cohere V2 API for new inference endpoints #129884
• Semantic Text Chunking Indexing Pressure #125517
• Track memory used in the hierarchical results normalizer #2831
• Upgrade AWS v2 SDK to 2.30.38 #124738
• [Inference API] Propagate product use case http header to EIS #124025
• [ML] Add HuggingFace Chat Completion support to the Inference Plugin #127254
• [ML] Add Rerank support to the Inference Plugin #127966
• [ML] Integrate SageMaker with OpenAI Embeddings #126856
• InferenceService support aliases #128584
• SageMaker Elastic Payload #129413

Mapping:

• Add index_options to semantic_text field mappings #119967
• Add block loader from stored field and source for ip field #126644
• Do not respect synthetic_source_keep=arrays if type parses arrays #127796 (issue: #126155)
• Enable synthetic recovery source by default when synthetic source is enabled. Using synthetic recovery source significantly improves indexing performance compared to regular recovery source. #122615 (issue: #116726)
• Enable the use of nested field type with index.mode=time_series #122224 (issue: #120874)
• Exclude semantic_text subfields from field capabilities API #127664
• Improved error message when index field type is invalid #122860
• Introduce FallbackSyntheticSourceBlockLoader and apply it to keyword fields #119546
• Refactor SourceProvider creation to consistently use MappingLookup #128213
• Skip indexing points for seq_no in tsdb and logsdb #128139
• Store arrays offsets for boolean fields natively with synthetic source #125529
• Store arrays offsets for ip fields natively with synthetic source #122999
• Store arrays offsets for keyword fields natively with synthetic source instead of falling back to ignored source. #113757
• Store arrays offsets for numeric fields natively with synthetic source #124594
• Store arrays offsets for unsigned long fields natively with synthetic source #125709
• Update sparse_vector field mapping to include default setting for token pruning #129089
• Use FallbackSyntheticSourceBlockLoader for shape and geo_shape #124927
• Use FallbackSyntheticSourceBlockLoader for unsigned_long and scaled_float fields #122637
• Use FallbackSyntheticSourceBlockLoader for boolean and date fields #124050
• Use FallbackSyntheticSourceBlockLoader for number fields #122280
• Use FallbackSyntheticSourceBlockLoader for point and geo_point #125816
• Use FallbackSyntheticSourceBlockLoader for text fields #126237

Network:

• Move HTTP content aggregation from Netty into RestController #129302 (issue: #120746)
• Remove first FlowControlHandler from HTTP pipeline #128099
• Replace auto-read with proper flow-control in HTTP pipeline #127817
• Set connection: close header on shutdown #128025 (issue: #127984)

Ranking:

• Adding ES|QL Reranker command in snapshot builds #123074
• Leverage scorer supplier in QueryFeatureExtractor #125259

Recovery:

• Move unpromotable relocations to its own transport action #127330

Relevance:

• Add l2_norm normalization support to linear retriever #128504
• Add pinned retriever #126401
• Default new semantic_text fields to use BBQ when models are compatible #126629
• Skip semantic_text embedding generation when no content is provided. #123763
• Support configurable chunking in semantic_text fields #121041

Search:

• Account for the SearchHit source in circuit breaker #121920 (issue: #89656)
• Add bucketedSort based on int #128848
• Add initial version (behind snapshot) of multi_match function #121525 #125062 (issue: #121525)
• Add min score linear retriever #129359
• ESQL - Enable telemetry for COMPLETION command #127731
• Enable sort optimization on int, short and byte fields #127968 (issue: #127965)
• Introduce batched query execution and data-node side reduce #121885
• Optimize memory usage in ShardBulkInferenceActionFilter #124313
• Optionally allow text similarity reranking to fail #121784
• Restore model registry validation for the semantic text field #127285
• Return float[] instead of List<Double> in valueFetcher #126702
• Simplified Linear Retriever #129200
• Simplified RRF Retriever #129659
• Upgrade to Lucene 10.2.0 #126594
• Upgrade to Lucene 10.2.1 #127343
• Upgrade to Lucene 10.2.2 #129546
• Wrap remote errors with cluster name to provide more context #123156

Snapshot/Restore:

• Add GCS telemetry with ThreadLocal #125452
• Add state query param to Get snapshots API #128635 (issue: #97446)
• Allow missing shard stats for restarted nodes for _snapshot/_status #128399
• GCS blob store: add OperationPurpose/Operation stats counters #122991
• Improve get-snapshots message for unreadable repository #128273
• Optimize shared blob cache evictions on shard removal Shared blob cache evictions occur on the cluster applier thread when shards are removed from a node. These can be expensive if a large number of shards are being removed. This change uses the context of the removal to avoid unnecessary evictions that might hold up the applier thread. #126581
• Retry when the server can't be resolved (Google Cloud Storage) #123852
• Upgrade AWS Java SDK to 2.31.78 #131050
• Upgrade to repository-gcs to use com.google.cloud:google-cloud-storage-bom:2.50.0 #126087
• [Draft] Support concurrent multipart uploads in Azure #128449

Stats:

• Run XPack usage actions on local node #122933

Task Management:

• React more prompty to task cancellation while waiting for the cluster to unblock #128737 (issue: #117971)

Vector Search:

• Add bit vector support to semantic text #123187
• Add dense vector off-heap stats to Node stats and Index stats APIs #126704
• Add option to include or exclude vectors from _source retrieval #128735
• Add panama implementations of byte-bit and float-bit script operations #124722 (issue: #117096)
• Adds implementations of dotProduct and cosineSimilarity painless methods to operate on float vectors for byte fields #122381 (issue: #117274)
• Allow zero for rescore_vector.oversample to indicate by-passing oversample and rescoring #125599
• Define a default oversample value for dense vectors with bbq_hnsw/bbq_flat #127134
• Improve HNSW filtered search speed through new heuristic #126876
• Make dense_vector fields updatable to bbq_flat/bbq_hnsw #128291
• Mark rescore_vector as generally available #126038
• New vector_rescore parameter as a quantized index type option #124581
• Panama vector accelerated optimized scalar quantization #127118

Watcher:

• Run TransportGetWatcherSettingsAction on local node #122857

Aggregations:

• Bypass competitive iteration in single filter bucket case #127267 (issue: #127262)
• Temporarily bypass competitive iteration for filters aggregation #126956

Allocation:

• DesiredBalanceReconciler always returns AllocationStats #122458

Analysis:

• Add refresh to synonyms put / delete APIs to wait for synonyms to be accessible and reload analyzers #126314 (issue: #121441)

Cluster Coordination:

• Disable logging in ClusterFormationFailureHelper on shutdown #125244 (issue: #105559)

Data streams:

• Move streams status actions to cluster:monitor group #131015
• [apm-data] Set event.dataset if empty for logs #129074

Distributed:

• Fix incorrect accounting of semantic text indexing memory pressure #130221
• Modify the mechanism to pause indexing #128405
• Pass IndexReshardingMetadata over the wire #124841

ES|QL:

• Added Sample operator NamedWritable to plugin #131541
• Disable a bugged commit #127199 (issue: #127197)
• Disallow remote enrich after lu join #131426 (issue: #129372)
• ESQL: Fix NULL handling in IN clause #125832 (issue: #119950)
• ESQL: Fix mv_expand inconsistent column order #129745 (issue: #129000)
• ESQL: Fix inconsistent results in using scaled_float field #122586 (issue: #122547)
• ESQL: Preserve single aggregate when all attributes are pruned #126397 (issue: #126392)
• ESQL: Retain aggregate when grouping #126598 (issue: #126026)
• Fail with 500 not 400 for ValueExtractor bugs #126296
• Fix LIMIT NPE with null value #130914 (issue: #130908)
• Fix PushQueriesIT.testLike() fails #129647
• Fix PushQueryIT#testEqualityOrTooBig #129657 (issue: #129545)
• Fix behavior for _index LIKE for ESQL #130849 (issue: #129511)
• Fix constant keyword optimization #129278
• Fix conversion of a Lucene wildcard pattern to a regexp #128750 (issues: #128677, #128676)
• Fix functions emitting warnings with no source #122821 (issue: #122588)
• Fix queries with missing index, skip_unavailable and filters #130344
• Fix transport versions #127668 (issue: #127667)
• Handle unavailable MD5 in ES|QL #130158
• Improve error message for ( and [ #124177 (issue: #124145)
• Prevent search functions work with a non-STANDARD index #130638 (issues: #130561, #129778)
• Remove duplicated nested commands #123085
• Resolve groupings in aggregate before resolving references to groupings in the aggregations #127524
• Retrieve token text only when necessary #126578
• Support avg on aggregate metric double #130421
• TO_IP can handle leading zeros #126532 (issue: #125460)
• TO_LOWER processes all values #124676 (issue: #124002)
• Workaround for RLike handling of empty lang pattern #128895 (issue: #128813)

Highlighting:

• Fix semantic highlighting bug on flat quantized fields #131525 (issue: #131443)

ILM+SLM:

• Fix PolicyStepsRegistry cache concurrency issue #126840 (issue: #118406)
• Inject an unfollow action before executing a downsample action in ILM #105773 (issue: #105773)
• Prevent ILM from processing shrunken index before its execution state is copied over #129455 (issue: #109206)
• The follower index should wait until the time series end time passes before unfollowing the leader index. #128361 (issue: #128129)

Indices APIs:

• Using a temp IndexService for template validation #129507 (issue: #129473)

Infra/Core:

• Reduce Data Loss in System Indices Migration #121327
• System data streams are not being upgraded in the feature migration API #126409 (issue: #122949)

Infra/Node Lifecycle:

• Better handling of node ids from shutdown metadata (avoid NPE on already removed nodes) #128298 (issue: #100201)

Infra/REST API:

• Fix NPE in APMTracer through RestController #128314
• Improve handling of empty response #125562 (issue: #57639)

Infra/Scripting:

• Add a custom toString to DynamicMap #126562 (issue: #70262)
• Add leniency to missing array values in mustache #126550 (issue: #55200)
• Fix painless return type cast for list shortcut #126724

Infra/Settings:

• Add retry for AccessDeniedException in AbstractFileWatchingService #128653

Ingest Node:

• Correctly handle non-integers in nested paths in the remove processor #127006
• Correctly handle nulls in nested paths in the remove processor #126417
• Correctly handling download_database_on_pipeline_creation within a pipeline processor within a default or final pipeline #131236
• apm-data: Use representative count as event.success_count if available #119995

Logs:

• Force niofs for fdt tmp file read access when flushing stored fields #130308

Machine Learning:

• Adding timeout to request for creating inference endpoint #126805
• Change ModelLoaderUtils.split to return the correct number of chunks and ranges. #126009 (issue: #121799)
• Fix ELAND endpoints not updating dimensions #126537
• Fix memory usage estimation for ELSER models #131630
• Prevent get datafeeds stats API returning an error when local tasks are slow to stop #125477 (issue: #104160)
• Provide model size statistics as soon as an anomaly detection job is opened #124638 (issue: #121168)
• Return a Conflict status code if the model deployment is stopped by a user #125204 (issue: #123745)
• Revert endpoint creation validation for ELSER and E5 #126792
• Updates to allow using Cohere binary embedding response in semantic search queries #121827
• Use INTERNAL_INGEST for Inference #127522 (issue: #127519)

Mapping:

• Synthetic source: avoid storing multi fields of type text and match_only_text by default #129126

Ranking:

• Restore TextSimilarityRankBuilder XContent output #124564
• Return BAD_REQUEST when a field scorer references a missing field #127229 (issue: #127162)

Relevance:

• Fix: Allow non-score secondary sorts in pinned retriever sub-retrievers #128323
• Prevent Query Rule Creation with Invalid Numeric Match Criteria #122823

Search:

• Add Cluster Feature for L2 Norm #129181
• Check positions on MultiPhraseQueries as well as phrase queries #129326 (issue: #123871)
• Filter out empty top docs results before merging #126385 (issue: #126118)
• Fix NPE in SemanticTextHighlighter #129509 (issue: #129501)
• Fix bug in point in time response #131391 (issue: #131026)
• Fix handling of auto expand replicas for stateless indices #122365
• Fix query rewrite logic to preserve boosts and queryName for match, knn, and sparse_vector queries on semantic_text fields #129282
• Improve execution of terms queries over wildcard fields #128986 (issue: #128201)
• Remove empty results before merging #126770 (issue: #126742)
• Simplified Linear & RRF Retrievers - Return error on empty fields param #129962

Snapshot/Restore:

• Do not apply further shard snapshot status updates after shard snapshot is complete #127250
• Fix computation of last block size in Azure concurrent multipart uploads #128746
• Limit number of suppressed S3 deletion errors #123630 (issue: #123354)
• Run newShardSnapshotTask tasks concurrently #126452
• Throw better exception if verifying empty repo #131677

Suggesters:

• Support duplicate suggestions in completion field #121324 (issue: #82432)

TLS:

• Watch SSL files instead of directories #129738

Transform:

• Check alias during update #124825

Vector Search:

• Fix and test off-heap stats when using direct IO for accessing the raw vectors #128615
• Fix filtered knn vector search when query timeouts are enabled #129440
• Fix top level knn search with scroll #126035

Aggregations:

• Aggs: Add cancellation checks to FilterByFilter aggregator #130452

Distributed:

• Drain responses on completion for TransportNodesAction #130303

ES|QL:

• Avoid O(N^2) in VALUES with ordinals grouping #130576
• Avoid dropping aggregate groupings in local plans #129370 (issues: #129811, #128054)
• Fix BytesRef2BlockHash #130705
• Fix wildcard drop after lookup join #130448 (issue: #129561)

Infra/Core:

• Reverse disordered-version warning message #129904

Machine Learning:

• Check for model deployment in inference endpoints before stopping #129325 (issue: #128549)
• Fix timeout bug in DBQ deletion of unused and orphan ML data #130083
• Including max_tokens through the Service API for Anthropic #131113

Mapping:

• Make flattened synthetic source concatenate object keys on scalar/object mismatch #129600 (issue: #122936)

Relevance:

• Fix: GET _synonyms returns synonyms with empty rules #131032

Search:

• Check field data type before casting when applying geo distance sort #130924 (issue: #129500)
• Fix msearch request parsing when index expression is null #130776 (issue: #129631)
• Fix text similarity reranker does not propagate min score correctly #129223
• Throw a 400 when sorting for all types of range fields #129725
• Trim to size lists created in source fetchers #130521

Vector Search:

• Fix knn search error when dimensions are not set #131081 (issue: #129550)

Authorization:

• Fix unsupported privileges error message during role and API key creation #129158 (issue: #128132)

Engine:

• Threadpool merge executor is aware of available disk space #127613
• Threadpool merge scheduler #120869

Ingest Node:

• Update traces duration mappings with appropriate unit type #129418

Snapshot/Restore:

• Update shardGenerations for all indices on snapshot finalization #128650 (issue: #108907)

Stats:

• Optimize sparse vector stats collection #128740

Aggregations:

• Aggs: Fix significant terms not finding background docuemnts for nested fields #128472 (issue: #101163)

Authorization:

• Prevent invalid privileges in manage roles privilege #128532 (issue: #127496)

CCS:

• Handle the indices pattern ["*", "-*"] when grouping indices by cluster name #128610

ES|QL:

• Fix FieldAttribute name usage in InferNonNullAggConstraint #128910
• Fix case insensitive comparisons to "" #127532 (issue: #127431)
• Support DATE_NANOS in LOOKUP JOIN #127962 (issue: #127249)
• Throw ISE instead of IAE for illegal block in page #128960

IdentityProvider:

• Improve cache invalidation in IdP SP cache #128890

Indices APIs:

• Avoid unnecessary determinization in index pattern conflict checks #128362

Infra/Core:

• Update AbstractXContentParser to support parsers that don't provide text characters #129005

Infra/Plugins:

• Add complete attribute to .fleet-agents docs #127651

Machine Learning:

• Account for Java direct memory on machine learning nodes to prevent out-of-memory crashes. #128742
• Ensure that anomaly detection job state update retries if master node is temoporarily unavailable #129391 (issue: #126148)
• Prevent ML data retention logic from failing when deleting documents in read-only indices #125408

Mapping:

• Check prefixes when constructing synthetic source for flattened fields #129580 (issue: #129508)

Search:

• Fix NPE in semantic highlighter #128989 (issue: #128975)
• Fix inner hits + aggregations concurrency bug #128036 (issue: #122419)
• Fix minmax normalizer handling of single-doc result sets #128689
• Fix missing highlighting in match_all queries for semantic_text fields #128702

Searchable Snapshots:

• Adjust unpromotable shard refresh request validation to allow RefreshResult.NO_REFRESH #129176 (issue: #129036)

Security:

• Fix error message when changing the password for a user in the file realm #127621

Authentication:

• Http proxy support in JWT realm #127337 (issue: #114956)

ES|QL:

• Limit Replace function memory usage #127924

Aggregations:

• Fix a bug in significant_terms #127975

Audit:

• Handle streaming request body in audit log #127798

Codec:

• Use new source loader when lower docId is accessed #128320

Data streams:

• Fix system data streams incorrectly showing up in the list of template validation problems #128161

Downsampling:

• Downsampling does not consider passthrough fields as dimensions #127752 (issue: #125156)

ES|QL:

• Consider inlinestats when having field_caps check for field names #127564 (issue: #127236)
• Don't push down filters on the right hand side of an inlinejoin #127383
• ESQL: Avoid unintended attribute removal #127563 (issue: #127468)
• ESQL: Fix alias removal in regex extraction with JOIN #127687 (issue: #127467)
• ESQL: Keep DROP attributes when resolving field names #127009 (issue: #126418)
• Ensure ordinal builder emit ordinal blocks #127949
• Fix union types in CCS #128111
• Fix validation NPE in Enrich and add extra @Nullable annotations #128260 (issues: #126297, #126253)

Geo:

• Added geometry validation for GEO types to exit early on invalid latitudes #128259 (issue: #128234)

Infra/Core:

• Add missing outbound_network entitlement to x-pack-core #126992 (issue: #127003)
• Check hidden frames in entitlements #127877

Infra/Scripting:

• Avoid nested docs in painless execute api #127991 (issue: #41004)

Machine Learning:

• Append all data to Chat Completion buffer #127658
• Fix services API Google Vertex AI Rerank location field requirement #127856
• Pass timeout to chat completion #128338
• Use internal user for internal inference action #128327

Relevance:

• Fix: Add NamedWriteable for RuleQueryRankDoc #128153 (issue: #126071)

Security:

• Remove dangling spaces wherever found #127475

Snapshot/Restore:

• Add missing entitlement to repository-azure #128047 (issue: #128046)

TSDB:

• Skip the validation when retrieving the index mode during reindexing a time series data stream #127824

Vector Search:

• [9.x] Revert "Enable madvise by default for all builds" #127921

Infra/Core:

• Validation checks on paths allowed for 'files' entitlements. Restrict the paths we allow access to, forbidding plugins to specify/request entitlements for reading or writing to specific protected directories. #126852

Ingest Node:

• Updating tika to 2.9.3 #127353

Search:

• Enable sort optimization on float and half_float #126342

Security:

• Add Issuer to failed SAML Signature validation logs when available #126310 (issue: #111022)

Aggregations:

• Rare terms aggregation false positive fix #126884

Allocation:

• Fix shard size of initializing restored shard #126783 (issue: #105331)

CCS:

• Cancel expired async search task when a remote returns its results #126583

Data streams:

• [otel-data] Bump plugin version to release _metric_names_hash changes #126850

ES|QL:

• Fix count optimization with pushable union types #127225 (issue: #127200)
• Fix join masking eval #126614
• Fix sneaky bug in single value query #127146
• No, line noise isn't a valid ip #127527

ILM+SLM:

• Fix equality bug in WaitForIndexColorStep #126605

Infra/CLI:

• Use terminal reader in keystore add command #126729 (issue: #98115)

Infra/Core:

• Fix: consider case sensitiveness differences in Windows/Unix-like filesystems for files entitlements #126990 (issue: #127047)
• Rework uniquify to not use iterators #126889 (issue: #126883)
• Workaround max name limit imposed by Jackson 2.17 #126806

Machine Learning:

• Adding missing onFailure call for Inference API start model request #126930
• Fix text structure NPE when fields in list have null value #125922
• Leverage threadpool schedule for inference api to avoid long running thread #126858 (issue: #126853)

Ranking:

• Fix LTR rescorer with model alias #126273
• LTR score bounding #125694

Search:

• Fix npe when using source confirmed text query against missing field #127414

TSDB:

• Improve resiliency of UpdateTimeSeriesRangeService #126637

Task Management:

• Fix race condition in RestCancellableNodeClient #126686 (issue: #88201)

Vector Search:

• Fix vec_caps to test for OS support too (on x64) #126911 (issue: #126809)
• Fix bbq quantization algorithm but for differently distributed components #126778

Allocation:

• Add a not-master state for desired balance #116904
• Only publish desired balance gauges on master #115383
• Reset relocation/allocation failure counter on node join/shutdown #119968

Authentication:

• Allow SSHA-256 for API key credential hash #120997

Authorization:

• Allow kibana_system user to manage .reindexed-v8-internal.alerts indices #118959
• Do not fetch reserved roles from native store when Get Role API is called #121971
• Grant necessary Kibana application privileges to reporting_user role #118058
• Make reserved built-in roles queryable #117581
• [Security Solution] Add create_index to kibana_system role for index/DS .logs-endpoint.action.responses-* #115241
• [Security Solution] allows kibana_system user to manage .reindexed-v8-* Security Solution indices #119054

CCS:

• Resolve/cluster allows querying for cluster info only (no index expression required) #119898

CRUD:

• Metrics for indexing failures due to version conflicts #119067
• Remove INDEX_REFRESH_BLOCK after index becomes searchable #120807
• Suppress merge-on-recovery for older indices #113462

Cluster Coordination:

• Include clusterApplyListener in long cluster apply warnings #120087

Data streams:

• Add action to create index from a source index #118890
• Add index and reindex request settings to speed up reindex #119780
• Add rest endpoint for create_from_source_index #119250
• Add sanity check to ReindexDatastreamIndexAction #120231
• Adding a migration reindex cancel API #118291
• Adding get migration reindex status #118267
• Consistent mapping for OTel log and event bodies #120547
• Filter deprecated settings when making dest index #120163
• Ignore closed indices for reindex #120244
• Improve how reindex data stream index action handles api blocks #120084
• Initial work on ReindexDatastreamIndexAction #116996
• Make requests_per_second configurable to throttle reindexing #120207
• Optimized index sorting for OTel logs #119504
• Reindex data stream indices on different nodes #125171
• Report Deprecated Indices That Are Flagged To Ignore Migration Reindex As A Warning #120629
• Retry ILM async action after reindexing data stream #124149
• Set cause on create index request in create from action #124363
• Update data stream deprecations warnings to new format and filter searchable snapshots from response #118562

Distributed:

• Make various alias retrieval APIs wait for cluster to unblock #117230
• Metrics for incremental bulk splits #116765
• Use Azure blob batch API to delete blobs in batches #114566

Downsampling:

• Improve downsample performance by buffering docids and do bulk processing #124477
• Improve rolling up metrics #124739

EQL:

• Add support for partial shard results #116388
• Optional named arguments for function in map #118619

ES|QL:

• Add ES|QL cross-cluster query telemetry collection #119474
• Add a LicenseAware interface for licensed Nodes #118931 (issue: #117405)
• Add a PostAnalysisAware, distribute verification #119798
• Add a standard deviation aggregating function: STD_DEV #116531
• Add cluster level reduction #117731
• Add nulls support to Categorize #117655
• Allow skip shards with _tier and _index in ES|QL #123728
• Async search responses have CCS metadata while searches are running #117265
• Check for early termination in Driver #118188
• Do not serialize EsIndex in plan #119580
• ESQL - Add Match function options #120360
• ESQL - Allow full text functions disjunctions for non-full text functions #120291
• ESQL - Remove restrictions for disjunctions in full text functions #118544
• ESQL - enabling scoring with METADATA _score #113120
• ESQL Add esql hash function #117989
• ESQL Support IN operator for Date nanos #119772 (issue: #118578)
• ESQL: Align RENAME behavior with EVAL for sequential processing #122250 (issue: #121739)
• ESQL: CATEGORIZE as a BlockHash #114317
• ESQL: Enable async get to support formatting #111104 (issue: #110926)
• ESQL: Enterprise license enforcement for CCS #118102
• ES|QL - Add scoring for full text functions disjunctions #121793
• ES|QL: Partial result on demand for async queries #118122
• Enable KQL function as a tech preview #119730
• Enable LOOKUP JOIN in non-snapshot builds #121193 (issue: #121185)
• Enable node-level reduction by default #119621
• Enable physical plan verification #118114
• Ensure cluster string could be quoted #120355
• Esql - Support date nanos in date extract function #120727 (issue: #110000)
• Esql - support date nanos in date format function #120143 (issue: #109994)
• Esql Support date nanos on date diff function #120645 (issue: #109999)
• Esql bucket function for date nanos #118474 (issue: #118031)
• Esql compare nanos and millis #118027 (issue: #116281)
• Esql implicit casting for date nanos #118697 (issue: #118476)
• Expand type compatibility for match function and operator #117555
• Extend TranslationAware to all pushable expressions #120192
• Fix Driver status iterations and cpuTime #123290 (issue: #122967)
• Hash functions #118938
• Implement a MetricsAware interface #121074
• Initial support for unmapped fields #119886
• LOOKUP JOIN using field-caps for field mapping #117246
• Lookup join on multiple join fields not yet supported #118858
• Move scoring in ES|QL out of snapshot #120354
• Optimize ST_EXTENT_AGG for geo_shape and cartesian_shape #119889
• Push down StartsWith and EndsWith functions to Lucene #123381 (issue: #123067)
• Push down filter passed lookup join #118410
• Resume Driver on cancelled or early finished #120020
• Reuse child outputSet inside the plan where possible #124611
• Rewrite TO_UPPER/TO_LOWER comparisons #118870 (issue: #118304)
• ST_EXTENT aggregation #117451 (issue: #104659)
• ST_EXTENT_AGG optimize envelope extraction from doc-values for cartesian_shape #118802
• Smarter field caps with subscribable listener #116755
• Support ST_ENVELOPE and related (ST_XMIN, ST_XMAX, ST_YMIN, ST_YMAX) functions #116964 (issue: #104875)
• Support partial sort fields in TopN pushdown #116043 (issue: #114515)
• Support some stats on aggregate_metric_double #120343 (issue: #110649)
• Take named parameters for identifier and pattern out of snapshot #121850
• Term query for ES|QL #117359
• Update grammar to rely on indexPattern instead of identifier in join target #120494
• _score should not be a reserved attribute in ES|QL #118435 (issue: #118460)

Engine:

• Defer unpromotable shard refreshes until index refresh blocks are cleared #120642
• POC mark read-only #119743

Experiences:

• Integrate IBM watsonx to Inference API for re-ranking task #117176

Extract&Transform:

• [Connector API] Support hard deletes with new URL param in delete endpoint #120200
• [Connector API] Support soft-deletes of connectors #118669
• [Connector APIs] Enforce index prefix for managed connectors #117778

Geo:

• Optimize indexing points with index and doc values set to true #120271

Health:

• Increase replica_unassigned_buffer_time default from 3s to 5s #112834

Highlighting:

• Add Highlighter for Semantic Text Fields #118064

ILM+SLM:

• Add a replicate_for option to the ILM searchable_snapshot action #119003

Indices APIs:

• Add remove_index_block arg to _create_from api #120548
• Remove index blocks by default in create_from #120643
• Run TransportGetComponentTemplateAction on local node #116868
• Run TransportGetComposableIndexTemplate on local node #119830
• Run TransportGetIndexTemplateAction on local node #119837
• introduce new categories for deprecated resources in deprecation API #120505

Inference:

• Add version prefix to Inference Service API path #117095
• Remove Elastic Inference Service feature flag and deprecated setting #120842
• Update sparse text embeddings API route for Inference Service #118025
• [Elastic Inference Service] Add ElasticInferenceService Unified ChatCompletions Integration #118871

Infra/CLI:

• Ignore _JAVA_OPTIONS #124843
• Strengthen encryption for elasticsearch-keystore tool to AES 256 #119749

Infra/Circuit Breakers:

• Add link to Circuit Breaker "Data too large" exception message #113561

Infra/Core:

• Add support for specifying reindexing script for system index migration #119001
• Bump major version for feature migration system indices #117243
• Change default Docker image to be based on UBI minimal instead of Ubuntu #116739
• Improve size limiting string message #122427
• Infrastructure for assuming cluster features in the next major version #118143
• Permanently switch from Java SecurityManager to Entitlements. The Java SecurityManager has been deprecated since Java 17, and it is now completely disabled in Java 24. In order to retain an similar level of protection, Elasticsearch implemented its own protection mechanism, Entitlements. Starting with this version, Entitlements will permanently replace the Java SecurityManager. #124865
• Update ASM 9.7 -> 9.7.1 to support JDK 24 #118094

Infra/Metrics:

• Add ensureGreen test method for use with adminClient #113425

Infra/REST API:

• A new query parameter ?include_source_on_error was added for create / index, update and bulk REST APIs to control if to include the document source in the error response in case of parsing errors. The default value is true. #120725
• Indicate when errors represent timeouts #124936

Infra/Scripting:

• Add a mustache.max_output_size_bytes setting to limit the length of results from mustache scripts #114002

Infra/Settings:

• Introduce IndexSettingDeprecatedInV8AndRemovedInV9 Setting property #120334
• Run TransportClusterGetSettingsAction on local node #119831

Ingest Node:

• Allow setting the type in the reroute processor #122409 (issue: #121553)
• Optimize IngestCtxMap construction #120833
• Optimize IngestDocMetadata isAvailable #120753
• Optimize IngestDocument FieldPath allocation #120573
• Optimize some per-document hot paths in the geoip processor #120824
• Returning ignored fields in the simulate ingest API #117214
• Run GetPipelineTransportAction on local node #120445
• Run TransportGetEnrichPolicyAction on local node #121124
• Run template simulation actions on local node #120038

License:

• Bump TrialLicenseVersion to allow starting new trial on 9.0 #120198

Logs:

• Add LogsDB option to route on sort fields #116687
• Add a new index setting to skip recovery source when synthetic source is enabled #114618
• Configure index sorting through index settings for logsdb #118968 (issue: #118686)
• Optimize loading mappings when determining synthetic source usage and whether host.name can be sorted on. #120055

Machine Learning:

• Add DeBERTa-V2/V3 tokenizer #111852
• Add Inference Unified API for chat completions for OpenAI #117589
• Add Jina AI API to do inference for Embedding and Rerank models #118652
• Add enterprise license check for Inference API actions #119893
• Adding chunking settings to IbmWatsonxService #114914
• Adding default endpoint for Elastic Rerank #117939
• Adding endpoint creation validation for all task types to remaining services #115020
• Automatically rollover legacy .ml-anomalies indices #120913
• Automatically rollover legacy ml indices #120405
• Change the auditor to write via an alias #120064
• Check for presence of error object when validating streaming responses from integrations in the inference API #118375
• Check if the anomaly results index has been rolled over #125404
• ES|QL categorize with multiple groupings #118173
• Ignore failures from renormalizing buckets in read-only index #118674
• Inference duration and error metrics #115876
• Migrate stream to core error parsing #120722
• Remove all mentions of eis and gateway and deprecate flags that do #116692
• Remove deprecated sort from reindex operation within dataframe analytics procedure #117606
• Retry on ClusterBlockException on transform destination index #118194
• Support mTLS for the Elastic Inference Service integration inside the inference API #119679
• [Inference API] Add node-local rate limiting for the inference API #120400
• [Inference API] fix spell words: covertToString to convertToString #119922

Mapping:

• Add Optional Source Filtering to Source Loaders #113827
• Add option to store sparse_vector outside _source #117917
• Release semantic_text as a GA feature #124669

Network:

• Allow http unsafe buffers by default #116115
• Http stream activity tracker and exceptions handling #119564
• Remove HTTP content copies #117303
• ConnectTransportException returns retryable BAD_GATEWAY #118681 (issue: #118320)

Packaging:

• Update bundled JDK to Java 24 #125159

Ranking:

• Add a generic rescorer retriever based on the search request's rescore functionality #118585 (issue: #118327)
• Set default reranker for text similarity reranker to Elastic reranker #120551

Recovery:

• Allow archive and searchable snapshots indices in N-2 version #118941
• Trigger merges after recovery #113102

Reindex:

• Change Reindexing metrics unit from millis to seconds #115721

Relevance:

• Add Multi-Field Support for Semantic Text Fields #120128

Search:

• Add match support for semantic_text fields #117839
• Add support for sparse_vector queries against semantic_text fields #118617
• Add support for knn vector queries on semantic_text fields #119011
• Added optional parameters to QSTR ES|QL function #121787 (issue: #120933)
• Adding linear retriever to support weighted sums of sub-retrievers #120222
• Address and remove any references of RestApiVersion version 7 #117572
• Feat: add a user-configurable timeout parameter to the _resolve/cluster API #120542
• Make semantic text part of the text family #119792
• Only aggregations require at least one shard request #115314
• Prevent data nodes from sending stack traces to coordinator when error_trace=false #118266
• Propagate status codes from shard failures appropriately #118016 (issue: #118482)
• Upgrade to Lucene 10 #114741
• Upgrade to Lucene 10.1.0 #119308

Security:

• Add refresh .security index call between security migrations #114879

Snapshot/Restore:

• Add IMDSv2 support to repository-s3 #117748 (issue: #105135)
• Expose operation and request counts separately in repository stats #117530 (issue: #104443)
• Retry S3BlobContainer#getRegister on all exceptions #114813
• Retry internally when CAS upload is throttled [GCS] #120250 (issue: #116546)
• Track shard snapshot progress during node shutdown #112567
• Upgrade AWS SDK to v1.12.746 #122431

Suggesters:

• Extensible Completion Postings Formats #111494

TSDB:

• Increase field limit for OTel metrics to 10 000 #120591

Transform:

• Add support for extended_stats #120340
• Auto-migrate max_page_search_size #119348
• Create upgrade mode #117858
• Wait while index is blocked #119542
• [Deprecation] Add transform_ids to outdated index #120821

Vector Search:

• Add new experimental rank_vectors mapping for late-interaction second order ranking #118804
• Even better(er) binary quantization #117994
• KNN vector rescoring for quantized vectors #116663
• Mark bbq indices as GA and add rolling upgrade integration tests #121105
• Speed up bit compared with floats or bytes script operations #117199

Aggregations:

• Aggs: Let terms run in global ords mode no match #124782
• Handle with illegalArgumentExceptions negative values in HDR percentile aggregations #116174 (issue: #115777)

Analysis:

• Adjust exception thrown when unable to load hunspell dict #123743
• Analyze API to return 400 for wrong custom analyzer #121568 (issue: #121443)
• Non existing synonyms sets do not fail shard recovery for indices #125659 (issue: #125603)

Authentication:

• Fix NPE for missing Content Type header in OIDC Authenticator #126191

CAT APIs:

• Fix cat_component_templates documentation #120487

CRUD:

• Preserve thread context when waiting for segment generation in RTG #114623
• Preserve thread context when waiting for segment generation in RTG #117148

Data streams:

• Avoid updating settings version in MetadataMigrateToDataStreamService when settings have not changed #118704
• Block-writes cannot be added after read-only #119007 (issue: #119002)
• Ensure removal of index blocks does not leave key with null value #122246
• Fixes a invalid warning from being issued when restoring a system data stream from a snapshot. #125881
• Match dot prefix of migrated DS backing index with the source index #120042
• Refresh source index before reindexing data stream index #120752 (issue: #120314)
• Updating TransportRolloverAction.checkBlock so that non-write-index blocks do not prevent data stream rollover #122905
• ReindexDataStreamIndex bug in assertion caused by reference equality #121325

Downsampling:

• Copy metrics and default_metric properties when downsampling aggregate_metric_double #121727 (issues: #119696, #96076)
• Improve downsample performance by avoiding to read unnecessary dimension values when downsampling. #124451

ES|QL:

• Add support to VALUES aggregation for spatial types #122886 (issue: #122413)
• Allow the data type of null in filters #118324 (issue: #116351)
• Avoid over collecting in Limit or Lucene Operator #123296
• Change the order of the optimization rules #124335
• Correct line and column numbers of missing named parameters #120852
• Drop null columns in text formats #117643 (issue: #116848)
• ESQL - date nanos range bug? #125345 (issue: #125439)
• ESQL: Fail in AggregateFunction when LogicPlan is not an Aggregate #124446 (issue: #124311)
• ESQL: Remove estimated row size assertion #122762 (issue: #121535)
• ES|QL: Fix scoring for full text functions #124540
• Esql - Fix lucene push down behavior when a range contains nanos and millis #125595
• Fix ROUND() with unsigned longs throwing in some edge cases #119536
• Fix TDigestState.read CB leaks #114303 (issue: #114194)
• Fix TopN row size estimate #119476 (issue: #106956)
• Fix AbstractShapeGeometryFieldMapperTests #119265 (issue: #119201)
• Fix ReplaceMissingFieldsWithNull #125764 (issues: #126036, #121754, #126030)
• Fix a bug in TOP #121552
• Fix async stop sometimes not properly collecting result #121843 (issue: #121249)
• Fix attribute set equals #118823
• Fix double lookup failure on ESQL #115616 (issue: #111398)
• Fix function registry concurrency issues on constructor #123492 (issue: #123430)
• Fix queries with document level security on lookup indexes #120617 (issue: #120509)
• Fix writing for LOOKUP status #119296 (issue: #119086)
• Implicit numeric casting for CASE/GREATEST/LEAST #122601 (issue: #121890)
• Lazy collection copying during node transform #124424
• Limit memory usage of fold #118602
• Limit size of query #117898
• Make numberOfChannels consistent with layout map by removing duplicated ChannelSet #125636
• Reduce iteration complexity for plan traversal #123427
• Remove redundant sorts from execution plan #121156
• Revert unwanted ES|QL lexer changes from PR #120354 #120538
• Revive inlinestats #122257
• Revive some more of inlinestats functionality #123589
• Use a must boolean statement when pushing down to Lucene when scoring is also needed #124001 (issue: #123967)

Engine:

• Hold store reference in InternalEngine#performActionWithDirectoryReader(...) #123010 (issue: #122974)

Health:

• Do not recommend increasing max_shards_per_node #120458

Highlighting:

• Restore V8 REST compatibility around highlight force_source parameter #124873

Indices APIs:

• Add ?master_timeout to POST /_ilm/migrate_to_data_tiers #120883
• Fix NPE in rolling over unknown target and return 404 #125352
• Fix broken yaml test 30_create_from #120662
• Include hidden indices in DeprecationInfoAction #118035 (issue: #118020)
• Preventing ConcurrentModificationException when updating settings for more than one index #126077
• Updates the deprecation info API to not warn about system indices and data streams #122951

Inference:

• [Inference API] Put back legacy EIS URL setting #121207

Infra/Core:

• Epoch Millis Rounding Down and Not Up 2 #118353
• Fix system data streams to be restorable from a snapshot #124651 (issue: #89261)
• Have create index return a bad request on poor formatting #123761
• Include data streams when converting an existing resource to a system resource #121392
• System Index Migration Failure Results in a Non-Recoverable State #122326
• System data streams are not being upgraded in the feature migration API #124884 (issue: #122949)
• Wrap jackson exception on malformed json string #114445 (issue: #114142)

Infra/Logging:

• Move SlowLogFieldProvider instantiation to node construction #117949

Infra/Metrics:

• Make randomInstantBetween always return value in range [minInstant, maxInstant] #114177

Infra/Plugins:

• Remove unnecessary entitlement #120959
• Restrict agent entitlements to the system classloader unnamed module #120546

Infra/REST API:

• Fixed a NullPointerException in _capabilities API when the path parameter is null. #113413 (issue: #113413)

Infra/Scripting:

• Register mustache size limit setting #119291

Infra/Settings:

• Don't allow secure settings in YML config (109115) #115779 (issue: #109115)

Ingest Node:

• Add warning headers for ingest pipelines containing special characters #114837 (issue: #104411)
• Fix geoip databases index access after system feature migration #121196
• Fix geoip databases index access after system feature migration (again) #122938
• Fix geoip databases index access after system feature migration (take 3) #124604

Logs:

• Always check if index mode is logsdb #116922

Machine Learning:

• Add ElasticInferenceServiceCompletionServiceSettings #123155
• Add enterprise license check to inference action for semantic text fields #122293
• Avoid potentially throwing calls to Task#getDescription in model download #124527
• Change format for Unified Chat #121396
• Fix AlibabaCloudSearchCompletionAction not accepting ChatCompletionInputs #125023
• Fix get all inference endponts not returning multiple endpoints sharing model deployment #121821
• Fix serialising the inference update request #122278
• Fixing bedrock event executor terminated cache issue #118177 (issue: #117916)
• Fixing bug setting index when parsing Google Vertex AI results #117287
• Retry on streaming errors #123076
• Set Connect Timeout to 5s #123272
• Set default similarity for Cohere model to cosine #125370 (issue: #122878)
• Updating Inference Update API documentation to have the correct PUT method #121048
• Wait for up to 2 seconds for yellow status before starting search #115938 (issues: #107777, #105955, #107815, #112191)
• [Inference API] Fix output stream ordering in InferenceActionProxy #124225
• [Inference API] Fix unique ID message for inference ID matches trained model ID #119543 (issue: #111312)

Mapping:

• Avoid serializing empty _source fields in mappings #122606
• Enable New Semantic Text Format Only On Newly Created Indices #121556
• Fix Semantic Text 8.x Upgrade Bug #125446
• Fix propagation of dynamic mapping parameter when applying copy_to #121109 (issue: #113049)
• Fix realtime get of nested fields with synthetic source #119575 (issue: #119553)
• Merge field mappers when updating mappings with [subobjects:false] #120370 (issue: #120216)
• Merge template mappings properly during validation #124784 (issue: #123372)
• Tweak copy_to handling in synthetic _source to account for nested objects #120974 (issue: #120831)

Network:

• Remove ChunkedToXContentBuilder #119310 (issue: #118647)

Ranking:

• Fix LTR query feature with phrases (and two-phase) queries #125103

Search:

• Catch and handle disconnect exceptions in search #115836
• Fix leak in DfsQueryPhase and introduce search disconnect stress test #116060 (issue: #115056)
• Fix/QueryBuilderBWCIT_muted_test #117831
• Handle long overflow in dates #124048 (issue: #112483)
• Handle search timeout in SuggestPhase #122357 (issue: #122186)
• In this pr, a 400 error is returned when _source / _seq_no / _feature / _nested_path / _field_names is requested, rather a 5xx #117229
• Inconsistency in the _analyzer api when the index is not included #115930
• Let MLTQuery throw IAE when no analyzer is set #124662 (issue: #124562)
• Load FieldInfos from store if not yet initialised through a refresh on IndexShard #125650 (issue: #125483)
• Log stack traces on data nodes before they are cleared for transport #125732
• Minor-Fixes Support 7x segments as archive in 8x / 9x #125666
• Re-enable parallel collection for field sorted top hits #125916
• Remove duplicate code in ESIntegTestCase #120799
• SearchStatesIt failures reported by CI #117618 (issues: #116617, #116618)
• Skip fetching _inference_fields field in legacy semantic_text format #121720
• Support indices created in ESv6 and updated in ESV7 using different LuceneCodecs as archive in current version. #119503 (issue: #117042)
• Test/107515 restore template with match only text mapper it fail #120392 (issue: #107515)
• Updated Date Range to Follow Documentation When Assuming Missing Values #112258 (issue: #111484)
• CrossClusterIT testCancel failure #117750 (issue: #108061)
• SearchServiceTests.testParseSourceValidation failure #117963

Snapshot/Restore:

• Add undeclared Azure settings, modify test to exercise them #118634
• Fork post-snapshot-delete cleanup off master thread #122731
• Retry throttled snapshot deletions #113237
• This PR fixes a bug whereby partial snapshots of system datastreams could be used to restore system features. #124931
• Use the system index descriptor in the snapshot blob cache cleanup task #120937 (issue: #120518)

Store:

• Do not capture ClusterChangedEvent in IndicesStore call to #onClusterStateShardsClosed #120193

Suggesters:

• Return an empty suggestion when suggest phase times out #122575 (issue: #122548)

Transform:

• If the Transform is configured to write to an alias as its destination index, when the delete_dest_index parameter is set to true, then the Delete API will now delete the write index backing the alias #122074 (issue: #121913)

Vector Search:

• Apply default k for knn query eagerly #118774
• Fix bbq_hnsw merge file cleanup on random IO exceptions #119691 (issue: #119392)
• Knn vector rescoring to sort score docs #122653 (issue: #119711)
• Return appropriate error on null dims update instead of npe #125716

Watcher:

• Watcher history index has too many indexed fields - #117701 (issue: #71479)