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Elasticsearch release notes [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.

% Release notes include only features, enhancements, and fixes. Add breaking changes, deprecations, and known issues to the applicable release notes sections.

% ## version.next [elasticsearch-next-release-notes]

% ### Features and enhancements [elasticsearch-next-features-enhancements] % *

% ### Fixes [elasticsearch-next-fixes] % *

9.1.3 [elasticsearch-9.1.3-release-notes]

stack: coming 9.1.3

Highlights [elasticsearch-9.1.3-highlights]

::::{dropdown} Security advisory The 9.1.3 release contains fixes for potential security vulnerabilities. Please see our (security advisory)[https://discuss.elastic.co/c/announcements/security-announcements/31] for more details. ::::

Features and enhancements [elasticsearch-9.1.3-features-enhancements]

Infra/REST API:

  • Limit the depth of a filter #133113

Ingest Node:

Packaging:

  • Update bundled JDK to Java 24.0.2+12 #133119

Fixes [elasticsearch-9.1.3-fixes]

Data streams:

  • Force rollover on write to true when data stream indices list is empty #133347 (issue: #133176)

EQL:

  • Better error message for sequences with only one clause plus UNTIL #132638
  • Fix sequences with conditions involving keys and non-keys #133134

ES|QL:

Ingest Node:

  • Change GeoIpCache and EnrichCache to LongAdder #132922

License:

  • Limit frequency of feature last-used time updates #133004

Machine Learning:

  • Disable child span for streaming tasks #132945
  • Improve EIS auth call logs and fix revocation bug #132546
  • Preserve lost thread context in node inference action. A lost context causes a memory leak if APM tracing is enabled #132973
  • Update EIS sparse and dense embedding max batch size to 16 #132646
  • [EIS] Rename the elser 2 default model and the default inference endpoint #130336

Search:

  • Don't fail search if bottom doc can't be formatted #133188 (issue: #125321)

9.0.6 [elasticsearch-9.0.6-release-notes]

stack: coming 9.0.6

Highlights [elasticsearch-9.0.6-highlights]

::::{dropdown} Security advisory The 9.0.6 release contains fixes for potential security vulnerabilities. Please see our (security advisory)[https://discuss.elastic.co/c/announcements/security-announcements/31] for more details. ::::

Features and enhancements [elasticsearch-9.0.6-features-enhancements]

Authorization:

  • [ExtraHop & QualysGAV] Add manage, create_index, read, index, write, delete, permission for third party agent indices kibana_system #132387 (issue: #131825)

Infra/REST API:

  • Limit the depth of a filter #133113

Ingest Node:

Packaging:

  • Update bundled JDK to Java 24.0.2+12 #133119

Fixes [elasticsearch-9.0.6-fixes]

EQL:

  • Better error message for sequences with only one clause plus UNTIL #132638
  • Fix sequences with conditions involving keys and non-keys #133134

Ingest Node:

  • Change GeoIpCache and EnrichCache to LongAdder #132922

License:

  • Limit frequency of feature last-used time updates #133004

Machine Learning:

  • Disable child span for streaming tasks #132945
  • Improve EIS auth call logs and fix revocation bug #132546
  • Preserve lost thread context in node inference action. A lost context causes a memory leak if APM tracing is enabled #132973

9.1.2 [elasticsearch-9.1.2-release-notes]

Features and enhancements [elasticsearch-9.1.2-features-enhancements]

Authorization:

  • Adds manage, create_index, read, index, write, and delete privileges for the kibana_system role on third-party agent indices used by ExtraHop (logs-extrahop.investigation-*) and Qualys GAV (logs-qualys_gav.asset-*). This ensures ILM policies can delete these indices without permission errors. #132387 (issue: #131825)

Fixes [elasticsearch-9.1.2-fixes]

Aggregations: :::{dropdown} Validates parent aggregation type in bucket_script The bucket_script pipeline aggregation didn’t validate that its parent aggregation was a multi-bucket aggregation. This caused a ClassCastException at runtime when the parent was not multi-bucket. #132320 adds a validation step so the aggregation fails early, preventing the runtime error. (issue: #132272) :::

Codec: :::{dropdown} Uses local segment fieldInfos for TSDB merge stats Merging shrink TSDB or LogsDB indices in versions 8.19 or 9.1+ could fail when using addIndexes to combine Lucene segments directly. In these cases, the fieldInfos value could differ between shards and the merged segment, causing incorrect merge statistics. PR #132597 updates the process to use fieldInfos from each segment instead of the merged segment, ensuring accurate stats and preventing merge failures. :::

ES|QL: :::{dropdown} Fixes for COPY_SIGN function in ESQL The COPY_SIGN function has been updated to better support the literal NULL in parameters. #132459 :::

Mapping: :::{dropdown} Calculates text string length correctly for code points outside BMP Strings parsed with the optimized UTF-8 parsing path had incorrect length calculations for characters outside the basic multilingual plane (BMP). These characters require two UTF-16 code units, but the optimized path did not account for this, causing mismatches with the non-optimized path. #132593 fixes the calculation to ensure consistent and correct string lengths. :::

Search: :::{dropdown} Always stops the timer when profiling the fetch phase Exceptions in fetch sub-phases (for example, setNextReader) left the profiling timer running, causing mismatched start/stop calls and errors. #132570 ensures the timer.stop() call always stops. :::

9.0.5 [elasticsearch-9.0.5-release-notes]

Features and enhancements [elasticsearch-9.0.5-features-enhancements]

Engine:

  • The available disk space is now logged when merge tasks are scheduled. If the disk space is below the indices.merge.disk.watermark.high threshold, this information is recorded to help diagnose and troubleshoot situations where merges fail due to insufficient disk space. #131711

Fixes [elasticsearch-9.0.5-fixes]

Aggregations: :::{dropdown} Validate parent aggregation type in bucket_script The bucket_script pipeline aggregation didn’t validate that its parent aggregation was a multi-bucket aggregation. This caused a ClassCastException at runtime when the parent was not multi-bucket. #132320 adds a validation step so the aggregation fails early, preventing the runtime error. (issue: #132272) :::

Data streams: :::{dropdown} Disables auto-sharding for LOOKUP index mode Auto-sharding for data streams caused unsupported replica scaling when the index mode was set to LOOKUP. This happened because lookup mappers do not support scaling beyond one replica. #131429 resolves this issue by disabling auto-sharding for data streams with LOOKUP index modes, avoiding unsupported replica settings. :::

EQL: :::{dropdown} Resolves EQL parsing failure for IP-mapped fields in OR expressions Parsing EQL queries failed when comparing the same IP-mapped field to multiple values joined by an OR expression. This occurred because lookup operators were internally rewritten into IN expressions, which are unsupported for IP-type fields. #132167 resolves the issue and ensures EQL can now successfully parse and execute such or queries involving IP fields. (issue: #118621) :::

:::{dropdown} Prevent double invocation of EQL listener In some cases, the EQL listener could be resolved twice, potentially leading to unexpected behavior. #124918 updates the control flow to exit early and ensure the listener is only invoked once. :::

ES|QL: :::{dropdown} Disallow remote ENRICH after LOOKUP JOIN Combining a LOOKUP JOIN with remote ENRICH could trigger a ClassCastException due to pipeline breaker interactions when limits or top-N queries were involved. #131426 adds a validation that forbids remote ENRICH after LOOKUP JOIN, preventing the runtime error. (issue: #129372) :::

:::{dropdown} Fix mv_expand inconsistent column order The mv_expand command could return columns in a different order depending on query execution paths. Now, the new attribute generated by mv_expand preserves the original field positions in the output. #129745 (issue: #129000) :::

:::{dropdown} Fixes ConcurrentModificationException caused by live operator list A ConcurrentModificationException caused test failures in CrossClusterAsyncEnrichStopIT.testEnrichAfterStop under certain conditions.
This happened because the ES|QL driver added a live operator list to the DriverStatus object, which could be modified while the status was being serialized.
#132260 fixes the issue by copying the operator list before storing it, preventing concurrent changes during status reads.
(issue: #131564) :::

Infra/Core: :::{dropdown} Grants server module read/write permissions for deprecated path.shared_data setting The server module is now granted read/write permissions for the deprecated path.shared_data setting.
#131680 resolves issues surfaced in internal testing and ensures compatibility with legacy configurations. :::

Ingest Node: :::{dropdown} Correctly handle download_database_on_pipeline_creation in default or final pipelines A bug in the download_database_on_pipeline_creation setting caused geoip databases not to download when the geoip processor was referenced from a pipeline processor in a default or final pipeline. This resulted in documents being tagged with _geoip_database_unavailable_GeoLite2-City.mmdb instead of having geo data. #131236 resolves the issue and ensures geoip databases download correctly in this scenario. :::

:::{dropdown} Fixes incorrect mapping resolution in simulate ingest API when mapping_addition is provided When using the simulate ingest API with a mapping_addition, the system incorrectly ignored the existing mapping of the target index and instead applied the mapping from a matching index template, if one existed. This caused mismatches between the index and simulation behavior. #132101 resolves the issue and ensures that the index’s actual mapping is used when available, preserving consistency between simulation and execution. :::

Machine Learning: :::{dropdown} Fix memory usage estimation for ELSER models Using the deployment ID instead of the model ID caused isElserV1Or2Model to fail for ELSER models, because deployment IDs don’t start with .elser_model_2. #131630 updates the code to pass the model ID, ensuring memory usage is estimated correctly. :::

:::{dropdown} Prevents double-counting of allocations in trained model deployment memory estimation A recent refactor introduced a bug that caused the trained model memory estimation to double-count the number of allocations, leading to inflated memory usage projections. #131990 resolves the issue by reverting the change and restoring accurate memory estimation for trained model deployments. :::

Mapping: :::{dropdown} Fixes decoding failure for non-ASCII field names in _ignored_source A decoding error occurred when field names in _ignored_source contained non-ASCII characters. This happened because String.length() was used to calculate the byte length of the field name, which only works correctly for ASCII characters. #132018 resolves the issue by using the actual byte array length of the encoded field name, ensuring proper decoding regardless of character encoding. :::

Search: :::{dropdown} Correct shard status reporting in point-in-time responses The Open PIT API incorrectly swapped the skipped and failed shard counts when partial search results were allowed. This caused the API to report failed shards as skipped and vice versa. #131391 fixes the field mapping so shard status is reported accurately. (issue: #131026) :::

:::{dropdown} Fix missing removal of query cancellation callback in QueryPhase A missing removal of a query cancellation callback caused unintended timeouts or cancellations in later search phases when allow_partial_search_results was enabled, which could lead to ArrayIndexOutOfBoundsException errors. #130279 resolves the issue and ensures predictable search execution. (issue: #130071) :::

:::{dropdown} Preserve boost and queryName for semantic queries Query rewrite logic dropped boost and queryName values for match, knn, and sparse_vector queries on semantic_text fields, causing query weighting and naming to be lost. #129282 resolves the issue so these values are now preserved correctly during query rewriting. :::

Snapshot/Restore: :::{dropdown} Improve error handling when verifying an empty snapshot repository

Verifying the integrity of a brand-new snapshot repository without any index blobs failed with a low-level error because the repository generation was -1, which cannot be sent over the wire. #131677 updates the logic to reject such requests early with a clearer, more helpful error message. :::

9.1.1 [elasticsearch-9.1.1-release-notes]

Fixes [elasticsearch-9.1.1-fixes]

Data streams: :::{dropdown} Disables auto-sharding for LOOKUP index mode Auto-sharding for data streams caused unsupported replica scaling when the index mode was set to LOOKUP. This happened because lookup mappers do not support scaling beyond one replica. #131429 resolves this issue by disabling auto-sharding for data streams with LOOKUP index mode, avoiding unsupported replica settings. :::

EQL: :::{dropdown} Resolves EQL parsing failure for IP-mapped fields in OR expressions Parsing EQL queries failed when comparing the same IP-mapped field to multiple values joined by an OR expression. This occurred because lookup operators were internally rewritten into IN expressions, which are unsupported for IP-type fields. #132167 resolves the issue and ensures EQL can now successfully parse and execute such or queries involving IP fields. (issue: #118621) :::

ES|QL: :::{dropdown} Fixes inconsistent equality and hashcode behavior for ConstantNullBlock Inconsistent equality checks caused constantNullBlock.equals(anyDoubleBlock) to return false, even when doubleBlock.equals(constantNullBlock) returned true. This asymmetry led to unreliable comparisons and mismatched hashcodes when ConstantNullBlock was functionally equivalent to other standard blocks. #131817 resolves the issue and ensures both equality and hashcode functions are symmetric for these block types. :::

:::{dropdown} Fixes ConcurrentModificationException caused by live operator list A ConcurrentModificationException caused test failures in CrossClusterAsyncEnrichStopIT.testEnrichAfterStop under certain conditions.
This happened because the ES|QL driver added a live operator list to the DriverStatus object, which could be modified while the status was being serialized.
#132260 fixes the issue by copying the operator list before storing it, preventing concurrent changes during status reads.
(issue: #131564) :::

:::{dropdown} Prevents null pointer exception for to_lower and to_upper with no parameters Calling the to_lower or to_upper functions with no parameters caused a null pointer exception (NPE), instead of returning a clear error. This behavior was a result of an older implementation of these functions. #131917 resolves the issue and ensures that empty parameter calls now return the correct error message. (issue: #131913) :::

:::{dropdown} Fixes aggregate_metric_double decoding and mv_expand behavior on multi-index queries Sorting across multiple indices failed when one index contained an aggregate_metric_double field and another did not. In this case, the missing field was encoded as NullBlock but later incorrectly decoded as AggregateMetricDoubleBlock, which expects four values. This mismatch caused decoding errors. #131658 resolves the issue and also improves mv_expand by returning the input block unchanged for unsupported AggregateMetricDoubleBlock values, avoiding unnecessary errors. :::

:::{dropdown} Fixes incorrect ingest_took value when combining bulk responses Combining two BulkResponse objects with ingest_took set to NO_INGEST_TOOK resulted in a combined ingest_took value of -2, which was invalid. This occurred because the combination logic failed to preserve the sentinel NO_INGEST_TOOK constant. #132088 resolves the issue and ensures the result is correctly set to NO_INGEST_TOOK when applicable. :::

:::{dropdown} Disallows remote ENRICH after FORK in query plans An invalid combination of FORK followed by a remote-only ENRICH caused incorrect query planning and failed executions. #131945 resolves the issue by explicitly disallowing this combination, preventing invalid plans from being executed. (issue: #131445) :::

:::{dropdown} Adds support for splitting large pages on load to avoid memory pressure Loading large rows from a single segment occasionally created oversized pages when decoding values row-by-row, particularly for text and geo fields. This could cause memory pressure or degraded performance. #131053 resolves the issue by estimating the size of each page as rows are loaded. If the estimated size exceeds a configurable jumbo threshold (defaulting to one megabyte), row loading stops early, the page is returned, and remaining rows are processed in subsequent iterations. This prevents loading incomplete or oversized pages during data aggregation. :::

Infra/Core: :::{dropdown} Grants server module read/write permissions for deprecated path.shared_data setting Grants the server module read/write access to the deprecated path.shared_data setting.
#131680 resolves issues surfaced in internal testing and ensures compatibility with legacy configurations. :::

Ingest Node: :::{dropdown} Fixes incorrect mapping resolution in simulate ingest API when mapping_addition is provided When using the simulate ingest API with a mapping_addition, the system incorrectly ignored the existing mapping of the target index and instead applied the mapping from a matching index template, if one existed. This caused mismatches between the index and simulation behavior. #132101 resolves the issue and ensures that the index’s actual mapping is used when available, preserving consistency between simulation and execution. :::

Machine Learning: :::{dropdown} Prevents double-counting of allocations in trained model deployment memory estimation A recent refactor introduced a bug that caused the trained model memory estimation to double-count the number of allocations, leading to inflated memory usage projections. #131990 resolves the issue by reverting the change and restoring accurate memory estimation for trained model deployments. :::

Mapping: :::{dropdown} Fixes decoding failure for non-ASCII field names in _ignored_source A decoding error occurred when field names in _ignored_source contained non-ASCII characters. This happened because String.length() was used to calculate the byte length of the field name, which only works correctly for ASCII characters. #132018 resolves the issue by using the actual byte array length of the encoded field name, ensuring proper decoding regardless of character encoding. :::

Search: :::{dropdown} Fixes index sort compatibility for date_nanos fields in indices created before 7.14 Indices created prior to version 7.14 that used an index sort on a date_nanos field could not be opened in more recent versions due to a mismatch in the default index.sort.missing value. A change in version 7.14 modified the default from Long.MIN_VALUE to 0L, which caused newer versions to reject those older indices. #132162 resolves the issue by restoring the expected default value for indices created before 7.14, allowing them to open successfully in newer versions. (issue: #132040) :::

:::{dropdown} Fix missing removal of query cancellation callback in QueryPhase The timeout cancellation callback registered in QueryPhase via addQueryCancellation was not removed after the query phase completed. This caused unintended timeouts or cancellations during subsequent phases under specific conditions (such as large datasets, low timeouts, and partial search results enabled). #130279 resolves the issue and ensures predictable behavior by reintroducing the cleanup logic. (issue: #130071) :::

9.1.0 [elasticsearch-9.1.0-release-notes]

Highlights [elasticsearch-9.1.0-highlights]

::::{dropdown} Upgrade repository-s3 to AWS SDK v2 In earlier versions of {{es}} the repository-s3 plugin was based on the AWS SDK v1. AWS will withdraw support for this SDK before the end of the life of {{es}} 9.1 so we have migrated this plugin to the newer AWS SDK v2. The two SDKs are not quite compatible, so please check the breaking changes documentation and test the new version thoroughly before upgrading any production workloads. ::::

::::{dropdown} Add ability to redirect ingestion failures on data streams to a failure store Documents that encountered ingest pipeline failures or mapping conflicts would previously be returned to the client as errors in the bulk and index operations. Many client applications are not equipped to respond to these failures. This leads to the failed documents often being dropped by the client which cannot hold the broken documents indefinitely. In many end user workloads, these failed documents represent events that could be critical signals for observability or security use cases.

To help mitigate this problem, data streams can now maintain a "failure store" which is used to accept and hold documents that fail to be ingested due to preventable configuration errors. The data stream's failure store operates like a separate set of backing indices with their own mappings and access patterns that allow Elasticsearch to accept documents that would otherwise be rejected due to unhandled ingest pipeline exceptions or mapping conflicts.

Users can enable redirection of ingest failures to the failure store on new data streams by specifying it in the new data_stream_options field inside of a component or index template:

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

Existing data streams can be configured with the new data stream _options endpoint:

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

When redirection is enabled, any ingestion related failures will be captured in the failure store if the cluster is able to, along with the timestamp that the failure occurred, details about the error encountered, and the document that could not be ingested. Since failure stores are a kind of Elasticsearch index, we can search the data stream for the failures that it has collected. The failures are not shown by default as they are stored in different indices than the normal data stream data. In order to retrieve the failures, we use the _search API along with a new bit of index pattern syntax, the :: selector.

POST logs-test-apache::failures/_search

This index syntax informs the search operation to target the indices in its failure store instead of its backing indices. It can be mixed in a number of ways with other index patterns to include their failure store indices in the search operation:

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

::::

::::{dropdown} Mark Token Pruning for Sparse Vector as GA Token pruning for sparse_vector queries has been live since 8.13 as tech preview. As of 8.19.0 and 9.1.0, this is now generally available. ::::

::::{dropdown} Upgrade to lucene 10.2.2

  • Reduce NeighborArray on-heap memory during HNSW graph building
  • Fix IndexSortSortedNumericDocValuesRangeQuery for integer sorting
  • ValueSource.fromDoubleValuesSource(dvs).getSortField() would throw errors when used if the DoubleValuesSource needed scores ---- ::::

::::{dropdown} Release FORK in tech preview Fork is a foundational building block that allows multiple branches of execution. Conceptually, fork is:

  • a bifurcation of the stream, with all data going to each fork branch, followed by
  • a merge of the branches, enhanced with a discriminator column called FORK:

Example:

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

The FORK command add a discriminator column called _fork:

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

::::

::::{dropdown} ES|QL cross-cluster querying is now generally available The ES|QL Cross-Cluster querying feature has been in technical preview since 8.13. As of releases 8.19.0 and 9.1.0 this is now generally available. This feature allows you to run ES|QL queries across multiple clusters. ::::

Features and enhancements [elasticsearch-9.1.0-features-enhancements]

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 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

    Fixes [elasticsearch-9.1.0-fixes]

    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

    9.0.4 [elasticsearch-9.0.4-release-notes]

    Fixes [elasticsearch-9.0.4-fixes]

    Aggregations:

    • Aggs: Add cancellation checks to FilterByFilter aggregator #130452

    Distributed:

    • Drain responses on completion for TransportNodesAction #130303

    ES|QL:

    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)

    9.0.3 [elasticsearch-9.0.3-release-notes]

    Features and enhancements [elasticsearch-9.0.3-features-enhancements]

    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

    Fixes [elasticsearch-9.0.3-fixes]

    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

    9.0.2 [elasticsearch-9.0.2-release-notes]

    Features and enhancements [elasticsearch-9.0.2-features-enhancements]

    Authentication:

    ES|QL:

    • Limit Replace function memory usage #127924

    Fixes [elasticsearch-9.0.2-fixes]

    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

    9.0.1 [elasticsearch-9.0.1-release-notes]

    Features and enhancements [elasticsearch-9.0.1-features-enhancements]

    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:

    Search:

    • Enable sort optimization on float and half_float #126342

    Security:

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

    Fixes [elasticsearch-9.0.1-fixes]

    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

    9.0.0 [elasticsearch-900-release-notes]

    Highlights [elasticsearch-900-highlights]

    ::::{dropdown} rank_vectors field type is now available for late-interaction ranking rank_vectors is a new field type released as an experimental feature in Elasticsearch 9.0. It is designed to be used with dense vectors and allows for late-interaction second order ranking.

    Late-interaction models are powerful rerankers. While their size and overall cost doesn’t lend itself for HNSW indexing, utilizing them as second order reranking can provide excellent boosts in relevance. The new rank_vectors mapping allows for rescoring over new and novel multi-vector late-interaction models like ColBERT or ColPali. ::::

    ::::{dropdown} ES|QL LOOKUP JOIN is now available in technical preview LOOKUP JOIN is now available in technical preview. LOOKUP JOIN combines data from your ES|QL queries with matching records from a lookup index, enabling you to:

    • Enrich your search results with reference data
    • Speed up root-cause analysis and security investigations
    • Join data across indices without complex queries
    • Reduce operational overhead when correlating events ::::

    ::::{dropdown} The semantic_text field type is now GA semantic_text is now an official GA (generally available) feature! This field type allows you to easily set up and perform semantic search with minimal ramp up time. ::::

    Features and enhancements [elasticsearch-900-features-enhancements]

    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

    Fixes [elasticsearch-900-fixes]

    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:

    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)