elasticsearch/docs/reference/release-notes/8.16.4.asciidoc

[[release-notes-8.16.4]]
== {es} version 8.16.4

Also see <<breaking-changes-8.16,Breaking changes in 8.16>>.

[[bug-8.16.4]]
[float]
=== Bug fixes

Aggregations::
* Aggregations cancellation after collection {es-pull}120944[#120944] (issue: {es-issue}108701[#108701])

Data streams::
* Map `scope.name` as a dimension {es-pull}120590[#120590]

ES|QL::
* Use `field_caps` native nested fields filtering {es-pull}117201[#117201] (issue: {es-issue}117054[#117054])

Mapping::
* Fix synthetic source issue with deeply nested ignored source fields {es-pull}121715[#121715]

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

Search::
* Fix potential file leak in ES816BinaryQuantizedVectorsWriter {es-pull}120014[#120014] (issue: {es-issue}119981[#119981])

Snapshot/Restore::
* Cheaper snapshot-related `toString()` impls {es-pull}121283[#121283]
* Issue S3 web identity token refresh call with sufficient permissions {es-pull}119748[#119748] (issue: {es-issue}119747[#119747])

[[enhancement-8.16.4]]
[float]
=== Enhancements

Ingest Node::
* Improve memory aspects of enrich cache {es-pull}120256[#120256] (issues: {es-issue}96050[#96050], {es-issue}120021[#120021])

[discrete]
[[known-issues-8.16.4]]
=== Known issues

{esql}::

* 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 {es-pull}126187[#126187].