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Elasticsearch v9.3.8

Elasticsearch: v9.3.8 Release

Release date:

July 15, 2026

Previous version:

v9.3.7 (released June 25, 2026)

Magnitude:

2,163 Diff Delta

Contributors:

29 total committers

Data confidence:

Commits:

87 Commits in this Release

Ordered by the degree to which they evolved the repo in this version.

Fix tool_choice for Model Garden Anthropic (#153112)

Authored July 7, 2026

Avoid dense run-len allocation in HLL (#152035) (#153596)

Authored July 13, 2026

[9.3] Add ArchUnit architecture checks for build logic (#151906) (#151994)

Authored June 30, 2026

[9.3] [Gradle] Enforce Isolated Projects idioms via ArchUnit (#152287) (#152479)

Authored June 30, 2026

[9.3] [Gradle] Allow disabling muted tests via -Dtests.mutes.enabled=false (#152948) (#153071)

Authored July 8, 2026

[ML] Retry trained model stats query on transient shard unavailability (#144962) (#153001)

Authored July 6, 2026

[Transform] Tighten retry startup logic (#152803) (#153144)

Authored July 7, 2026

Fix under-count in LuceneCountOperator (#151822) (#153699)

Authored July 13, 2026

ES|QL: implement watchdog timeout for GROK (#152851) (#152944) (#152949)

Authored July 6, 2026

[9.3] Fork ensureShardSearchActive callbacks off the refresh thread (#152509) (#152961)

Authored July 6, 2026

improve simulate bulk action authz (#152148) (#152262)

Authored June 26, 2026

[ML] Fix concurrent job creation race condition (#145158) (#153019)

Authored July 6, 2026

Migrate repository-multi-version to JUnit rule based test clusters (#151777) (#153775)

Authored July 14, 2026

Include ingest metadata in self reference checks (#152932) (#153275)

Authored July 8, 2026

[9.3] [Inference API] Prevent overriding secret_parameters (#153309) (#153446)

Authored July 10, 2026

Ignore OTLP number data points without a value (#152733) (#152782)

Authored July 2, 2026

[9.3] Fix reader context close race in markAsUsed (#152289) (#152394)

Authored June 29, 2026

Migrate :distribution:docker yaml tests to Testcontainers (#148452) (#152251)

Authored June 26, 2026

[9.3] Fix data stream privilege checking (#148179) (#152614)

Authored July 2, 2026

upgrade microsoft-graph dependency in ms-graph-authz (elastic#151968) (#152277)

Authored June 26, 2026

[9.3] [LicenseCheckPlugin] Detect duplicate header (#153810) (#153898)

Authored July 15, 2026

Bump versions after 9.3.7 release

Authored June 30, 2026

Fix DimensionValuesByteRefGroupingAggregatorFunctionTests (#153726)

Authored July 13, 2026

[Gradle] Migrate :qa:remote-clusters from TestFixturePlugin to Testcontainers (#148658) (#152258)

Authored June 26, 2026

[9.3] [Build] Migrate transform multinode tests to testcluster framework (#150330) (#153843)

Authored July 14, 2026

[ML] Fix test DatafeedJobsIT#testStopLookback_forceTrue_closeJobFalse (#144918) (#153000)

Authored July 6, 2026

Add more defensive protections when parsing query_string (#152385) (#152467)

Authored June 30, 2026

Fix ExchangeServiceTests (#150947) (#153712)

Authored July 13, 2026

Fix realtime-refresh YAML tests (#153264)

Authored July 8, 2026

[ML] Make test data deterministic (#146423) (#152150)

Authored June 26, 2026

Unmute synthetic source multi-field YAML test (#152940)

Authored July 6, 2026

[9.3] Stabilize Mistral not-found unit test (#152416)

Authored June 29, 2026

Remove coderabbit configuration (#152319) (#152344)

Authored June 26, 2026

[9.3] Apply search timeout to the query rewrite step (#153082) (#153375)

Authored July 9, 2026

Mute org.elasticsearch.xpack.transform.integration.TransformTaskFailedStateIT testStartFailedTransform #153065

Authored July 8, 2026

Mute org.elasticsearch.multiproject.test.CoreWithMultipleProjectsClientYamlTestSuiteIT test {yaml=search.highlight/30_max_analyzed_offset/Plain highlighter on a field WITH OFFSETS exceeding index.highlight.max_analyzed_offset should FAIL} #152367

Authored June 27, 2026

Mute org.elasticsearch.xpack.esql.action.EsqlDisruptionIT testFromStatsGroupingByDate #152475

Authored June 30, 2026

Mute org.elasticsearch.packaging.test.PackageUpgradeTests test21CheckUpgradedVersion #152909

Authored July 6, 2026

Mute org.elasticsearch.packaging.test.PackageUpgradeTests test12SetupBwcVersion #152819

Authored July 5, 2026

Sort DFA reindex by _doc for stable train/test split (#145167) (#153115)

Authored July 7, 2026

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Top Contributors in v9.3.8

breskeby

Jan-Kazlouski-elastic

dnhatn

prwhelan

luigidellaquila

drempapis

richard-dennehy

elasticsearchmachine

kkrik-es

chrisberkhout

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Release Notes Published

Downloads: https://elastic.co/downloads/elasticsearch Release notes: https://www.elastic.co/docs/release-notes/elasticsearch#elasticsearch-9.3.8-release-notes