Elasticsearch: v9.5.2 Release

70 Commits in this Release

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

[Inference API] Fix Anthropic translation to Unified schema (#155314) (#156718)

Authored August 14, 2026

[9.5] Upgrade to lucene 10.5.1 (#156643) (#156764)

Authored August 14, 2026

Charge fuzzy queries for their term expansions in the request breaker (#155485) (#156035)

Authored August 6, 2026

Count failed msearch sub-search responses against the circuit breaker (#156683) (#156837)

Authored August 15, 2026

Flakiness detection: pre-flight compile gate (#153806) (#156174)

Authored August 7, 2026

Unmute tests linked to closed issues (#156049)

Authored August 12, 2026

Score nested kNN inner_hits like the query phase (#156332) (#156611)

Authored August 12, 2026

nit (#156170)

Authored August 7, 2026

Simplify field matching in exclude source vectors (#156466) (#156612)

Authored August 12, 2026

Ensure `Error` propagates out of `S3BlobContainer` (#156784)

Authored August 14, 2026

ESQL: Fix override timestamp field in TS (#155623) (#156205)

Authored August 7, 2026

[9.5] Fix DOT_PRODUCT and COSINE score clamping in BBQ vector scorer (#156015) (#156039)

Authored August 6, 2026

[9.5] Downsample: fix duplicate field in cumulative histogram reset doc (#156287) (#156365)

Authored August 11, 2026

Upgrade the version of jackson to 2.18.9 (#154569) (#156366)

Authored August 11, 2026

Fix cluster state deadlock in reshard coordination test (#153881) (#156657)

Authored August 13, 2026

Fix flaky FloatHierarchicalKMeansTests.testHKmeans (#156966)

Authored August 18, 2026

ESQL: fix TS STATS alias colliding with grouping (#156609)

Authored August 14, 2026

Migrate :modules:reindex to JUnit rule test clusters (#155637) (#156073)

Authored August 6, 2026

[Test] Drop reseting EncryptionServiceRegistry in internal cluster tests (#154685) (#156967)

Authored August 17, 2026

[9.5] Remove flaky randomization from OperationalRoutingTests.testARSStatsAdjustment (#156000) (#156080)

Authored August 6, 2026

Fix recurring cluster-formation timeout flakiness in InternalTestCluster (#152751) (#156138)

Authored August 7, 2026

[Test] Fix StatelessRealTimeGetIT.testStress by increasing multipart part size (#153935) (#156775)

Authored August 14, 2026

Unmute testPitRelocationDuringReshard (#156346)

Authored August 11, 2026

[9.5] Fix NPE in BulkByPaginatedSearchResponseWireSerializingTests (#155497)

Authored August 11, 2026

Fix ensureExchangesAreReleased in CCS tests (#156093) (#156118)

Authored August 7, 2026

Update wolfi (versioned) (#156406)

Authored August 11, 2026

docs: behavior when both `pipeline` query is passed in bulk request and (#151096) (#156404)

Authored August 11, 2026

Bump ES|QL/Arrow Jackson to 2.21.5 (#156368) (#156372)

Authored August 11, 2026

Unmute DfsProfilerIT by fixing fuzzy query test params (#156283)

Authored August 11, 2026

upgrade bc-fips version (#156296) (#156535)

Authored August 12, 2026

Keep scroll contexts on transient search queue rejection (#155697) (#156523)

Authored August 12, 2026

Fix flaky byte-count assertion in SearchCoordinatorPhaseShardBytesMetricsIT (#153241) (#156645)

Authored August 13, 2026

removed the experimental flag for the auto_calibrate configuration (#156623) (#156691)

Authored August 13, 2026

[9,5] Mute XContentBuilderTests#testCloseAllowIllFormedDoesNotValidateStructuralCorrectness (#156778)

Authored August 14, 2026

remove @Order from RemoteClusterSecurityCcrMigrationIT and RemoteClusterSecurityTransformMigrationIT (#156671) (#156767)

Authored August 14, 2026

Improve failure handling for shards (#156515) (#156818)

Authored August 14, 2026

ES|QL: Fix MV-unsafe evaluator in Parquet late-mat filter (#156604) (#156873)

Authored August 16, 2026

Remove dead code from QueryPhaseTimeoutTests (#156566) (#156925)

Authored August 17, 2026

Wait for source PIT contexts before checking the PIT id (#156880) (#156915)

Authored August 17, 2026

Add 9.4 to exact_knn_oversample transport version (#156795) (#156972)

Authored August 18, 2026