elasticsearch/docs/reference/release-notes/8.17.9.asciidoc

[[release-notes-8.17.9]]
== {es} version 8.17.9

Also see <<breaking-changes-8.17,Breaking changes in 8.17>>.

[[bug-8.17.9]]
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=== Bug fixes

Aggregations::
* Aggs: Add cancellation checks to `FilterByFilter` aggregator {es-pull}130452[#130452]

ES|QL::
* Avoid O(N^2) in VALUES with ordinals grouping {es-pull}130576[#130576]
* Avoid dropping aggregate groupings in local plans {es-pull}129370[#129370] (issues: {es-issue}129811[#129811], {es-issue}128054[#128054])
* Fix `BytesRef2BlockHash` {es-pull}130705[#130705]

Search::
* Fix msearch request parsing when index expression is null {es-pull}130776[#130776] (issue: {es-issue}129631[#129631])

[[upgrade-8.17.9]]
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=== Upgrades

Packaging::
* Update default docker base image to Ubuntu 24.04 {es-pull}130277[#130277]