elasticsearch/docs/reference/release-notes/8.9.1.asciidoc

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[[release-notes-8.9.1]]
== {es} version 8.9.1
Also see <<breaking-changes-8.9,Breaking changes in 8.9>>.
[[known-issues-8.9.1]]
[float]
=== Known issues
include::8.7.1.asciidoc[tag=no-preventive-gc-issue]
[[bug-8.9.1]]
[float]
=== Bug fixes
Aggregations::
* `GlobalAggregator` should call rewrite() before `createWeight()` {es-pull}98091[#98091] (issue: {es-issue}98076[#98076])
Cluster Coordination::
* Improve exception handling in Coordinator#publish {es-pull}97840[#97840] (issue: {es-issue}97798[#97798])
EQL::
* Backport fix for async missing events and re-enable the feature {es-pull}98130[#98130]
ILM+SLM::
* Ignore the `total_shards_per_node` setting on searchable snapshots in frozen {es-pull}97979[#97979]
* Migrate to data tiers routing configures correct default for mounted indices {es-pull}97936[#97936] (issue: {es-issue}97898[#97898])
Infra/Core::
* Fix APM trace start time {es-pull}98113[#98113]
Infra/Logging::
* Add Configuration to `PatternLayout` {es-pull}97679[#97679]
Machine Learning::
* Fix failure processing Question Answering model output where the input has been spanned over multiple sequences {es-pull}98167[#98167] (issue: {es-issue}97917[#97917])
Search::
* `UnmappedFieldFetcher` should ignore nested fields {es-pull}97987[#97987] (issue: {es-issue}97684[#97684])
[[enhancement-8.9.1]]
[float]
=== Enhancements
Authentication::
* Upgrade xmlsec to 2.1.8 {es-pull}97741[#97741]
Infra/Core::
* Enhance regex performance with duplicate wildcards {es-pull}98176[#98176]
Machine Learning::
* Add setting to scale the processor count used in the model assignment planner {es-pull}98296[#98296]
Search::
* Refactor nested field handling in `FieldFetcher` {es-pull}97683[#97683]