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Elasticsearch v9.5.5

Elasticsearch: v9.5.5 Release

Release date:
September 30, 2026
Previous version:
v9.5.4 (released September 9, 2026)
Magnitude:
5,723 Diff Delta
Contributors:
41 total committers
Data confidence:
Commits:
153 impacting commits

153 Commits in this Release

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

[9.5] Fix METADATA behavior with subqueries and views (#157233) (#160134)
Authored September 23, 2026
[9.5] Fix query phase losing a listener in remote reduction rejection (#160152) (#160489)
Authored September 28, 2026
[9.5] ESQL: Warn on GROK typed conversion failure (#160564) (#160574) (#160636)
Authored September 30, 2026
[9.5] Hold store ref during recovery (#156981) (#160446)
Authored September 29, 2026
fix(build): make Snyk graph task config-cache safe (#160151) (#160292)
Authored September 25, 2026
Prune changelogs after 9.5.4 release
Authored September 15, 2026
[9.5] Tolerate missing remote indices during the inference rewrite (#160207) (#160526)
Authored September 29, 2026
[9.5] [Inference API] Support OpenAI chat completion reasoning effort (#156505) (#159382)
Authored September 15, 2026
JDK 27 EA compatibility fixes (#157055) (#159506)
Authored September 16, 2026
[9.5] Strengthen build-tools-internal plugin test coverage (#158873) (#158919)
Authored September 11, 2026
[9.5] Resolve high-cardinality keyword queries to ScanningBinaryDocValuesAutomatonQuery (#158633)
Authored September 10, 2026
Handle refresh exceptions in ensureShardSearchActive (#159526) (#159594)
Authored September 17, 2026
Fix sorted search failures on empty shard results (#160132) (#160622)
Authored September 30, 2026
[9.5] [Test] Fix `StatelessReshardIT::testSearchAtDone` (#159326) (#159367)
Authored September 15, 2026
Fix H3 great-circle latitude correction edge selection (#160228) (#160336)
Authored September 25, 2026
[9.5] [ESQL] Clear reminted parquet/orc filters (#158155) (#159119)
Authored September 11, 2026
refactor(SearchWithRejectionsIT): add listener and latch in testOpenContextsAfterRejections (#159965) (#160088)
Authored September 23, 2026
Reject Prometheus remote write 2.0 requests (#159987) (#160066)
Authored September 23, 2026
[9.5] Fix testConcurrentSnapshotDeleteAndDeleteIndex (#158765) (#159311)
Authored September 15, 2026
Netty upgrade 4.1.137.Final (#157348) (#159557)
Authored September 17, 2026
Netty upgrade 4.1.138.Final (#159561) (#159833)
Authored September 21, 2026
Make sure buffer files are cleared at startup (#159701) (#159879)
Authored September 21, 2026
Fix testPopulateCacheWithSharedSourceInputStreamFactory (#155640) (#159832)
Authored September 21, 2026
[9.5] Fix testTranslogIsolatedNodeOnlyStressRecoveryTest (#160104)
Authored September 23, 2026
test(SearchWithRejectionsIT): unmute
Authored September 23, 2026
Unmute #155704
Authored September 25, 2026
Update wolfi (versioned) (#158742)
Authored September 14, 2026
chore(deps): update wolfi (versioned) (#160568)
Authored September 29, 2026
Mute org.elasticsearch.index.store.FieldInfoCachingDirectoryTests testWeakReferenceReclaimsCanonical #159154
Authored September 21, 2026
Mute org.elasticsearch.xpack.security.transport.CrossClusterApiKeySignatureManagerTests testSignAndVerifyPKCS12orBCFKS #159807
Authored September 21, 2026
Mute org.elasticsearch.xpack.ml.integration.MlJobIT testCreateJobInSharedIndexUpdatesMapping #159275
Authored September 15, 2026
Mute org.elasticsearch.index.mapper.DateRangeDocValuesLoaderTests testEmptyRangesAppendsNull #159159
Authored September 14, 2026
Mute org.elasticsearch.xpack.security.transport.CrossClusterSigningConfigReloaderIntegTests testRemoveFileWithConfig #159810
Authored September 20, 2026
Mute org.elasticsearch.xpack.security.transport.CrossClusterApiKeySignatureManagerTests testSignAndVerifyDifferentPayloadFailsPKCS12orBCFKS #159806
Authored September 21, 2026
Mute org.elasticsearch.index.store.BytesReadHeaderIT testBiggerIndexReadsMoreBytes #159167
Authored September 14, 2026
Mute org.elasticsearch.xpack.logsdb.qa.LogsDbVersusReindexedLogsDbChallengeRestIT testRandomQueries #160063
Authored September 23, 2026
Mute org.elasticsearch.search.SearchWithRejectionsIT testOpenContextsAfterRejections #156244
Authored September 10, 2026
Mute org.elasticsearch.xpack.stateless.cache.SharedBlobCacheWarmingServiceTests testPopulateCacheWithSharedSourceInputStreamFactory #159129
Authored September 12, 2026
Mute org.elasticsearch.xpack.logsdb.qa.LogsDbVersusReindexedLogsDbChallengeRestIT testEsqlTermsAggregationByMethod #160062
Authored September 23, 2026
Mute org.elasticsearch.xpack.logsdb.qa.LogsDbVersusReindexedLogsDbChallengeRestIT testEsqlTermsAggregation #160061
Authored September 23, 2026

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Top Contributors in v9.5.5

craigtaverner
reugn
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