IMPORTANT: No additional bug fixes or documentation updates will be released for this version. For the latest information, see the current release documentation.

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Elasticsearch version 8.16.4

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IMPORTANT: This documentation is no longer updated. Refer to Elastic's version policy and the latest documentation.

Elasticsearch version 8.16.4

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Also see Breaking changes in 8.16.

Bug fixes

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Aggregations

Aggregations cancellation after collection #120944 (issue: #108701)

Data streams

Map scope.name as a dimension #120590

ES|QL

Use field_caps native nested fields filtering #117201 (issue: #117054)

Mapping

Fix synthetic source issue with deeply nested ignored source fields #121715

Ranking

Fix LTR rescorer throws local model reference is null on multi-shards index when explained is enabled #120717 (issue: #120739)
LTR sometines throw NullPointerException: Cannot read field "approximation" because "top" is null #120809
Normalize negative scores for text_similarity_reranker retriever #120930 (issue: #120201)
Update Text Similarity Reranker to Properly Handle Aliases #120062 (issue: #119617)

Search

Fix potential file leak in ES816BinaryQuantizedVectorsWriter #120014 (issue: #119981)

Snapshot/Restore

Cheaper snapshot-related toString() impls #121283
Issue S3 web identity token refresh call with sufficient permissions #119748 (issue: #119747)

Enhancements

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Ingest Node

Improve memory aspects of enrich cache #120256 (issues: #96050, #120021)

Known issues

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ES|QL

Some valid queries using an ENRICH command can fail when a match field is used that is absent from some indices or shards, either with a 500 status code due to NullPointerException or ClassCastException or with a 400 status code and IllegalArgumentException. This is fixed in #126187.

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