Elasticsearch: v9.4.0 Release

406 Commits in this Release

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

[9.3][GPU] Fix GPU plugin integration tests (#143425) (#143881)

Authored March 11, 2026

ESQL: More efficient toStrings (#145320) (#145890)

Authored April 8, 2026

T digest field type docs (#140478) (#141368)

Authored January 27, 2026

Remove Security Manager usage from x-pack security (#145638) (#145846)

Authored April 8, 2026

ESQL: Limit the `toString` of plan nodes (#145140) (#145274)

Authored March 31, 2026

[9.3] Implement comprehensive top N parameter handling for text similarity reranker (#142039) (#142314)

Authored February 11, 2026

Move HDFS-repo YAML to Rest tests (#146168)

Authored April 14, 2026

[9.3] Skip time series field type merge for non-TS agg queries (#143262) (#146808)

Authored April 21, 2026

[9.3] Support multi-value dimensions in downsampling (bug fix) (#145458) (#145536)

Authored April 2, 2026

ESQL: Do not discard disjunction conditions when is null/is not null might invalidate them (#145941) (#146034)

Authored April 10, 2026

[9.3] Remove all usages of TransportVersionUtils.randomVersionBetween (#140692) (#140748)

Authored January 15, 2026

[9.3] Fix circuit breaker leak in percolator query construction (#144827) (#144998)

Authored March 26, 2026

Prune changelogs after 9.2.7 release

Authored March 19, 2026

[9.3] Fix field caps incorrectly synthesizing object parents under subobjects:false passthrough mappers (#144183) (#144292)

Authored March 16, 2026

[9.3] Add timeout support for KNN searches in the DFS phase (#142925) (#143028)

Authored February 25, 2026

[9.3] ESQL: Enable nullify and fail unmapped resolution in tech-preview (#140528) (#140657)

Authored January 15, 2026

Prune changelogs after 9.3.1 release

Authored February 26, 2026

[9.3] Remove AuthorizationTaskExecutorMultipleNodesIT (#144042) (#144092)

Authored March 12, 2026

[9.3] [ES|QL] Fix TS bug when grouping on aliases (#141568) (#141857)

Authored February 4, 2026

Prune changelogs after 9.2.5 release

Authored February 3, 2026

[9.3] allocation: move shutdown explain to bulk/function shard variant (#142620) (#143546)

Authored March 4, 2026

[9.3] Remove remaining Security Manager artifacts (#146569) (#147471)

Authored April 27, 2026

[9.3] Exclude patch versions from TransportVersionUtils (#138997) (#140192)

Authored January 5, 2026

ES|QL: Fix handling of values on the time bucket boundaries for rate increase (#145794) (#145977)

Authored April 9, 2026

Add entitlement rule infrastructure for default values (#143755) (#143973)

Authored March 10, 2026

Fix ArrayIndexOutOfBoundsException in cat nodes for partial load average arrays (#144859) (#144930)

Authored March 26, 2026

[9.3] Reindexing older indices with percolator fields clears migration assistant errors (#141539) (#141553)

Authored January 29, 2026

Fix GoogleCloudStorageBlobStoreRepositoryTests#testMultipleSnapshotAndRollback (#139578) (#141689)

Authored February 2, 2026

[9.3] ESQL: Fix starts_with/ends_with/like with special chars (#146348) (#146422)

Authored April 16, 2026

ESQL: Avoid local physical optimization in node-reduce driver (#146509) (#147766)

Authored April 28, 2026

Move flaky assertion to IT from yamlRestTest (#147834) (#147878)

Authored April 29, 2026

[9.3] Fix deriv aggregation function intermediate state (#146160) (#146381)

Authored April 24, 2026

Cancel async query on expiry (#143016) (#144819)

Authored March 24, 2026

ESQL: Validate unsupported grouping types earlier (#147650) (#148003)

Authored April 30, 2026

[9.3] Ensure paused shard snapshot can be deleted (#141408) (#141484)

Authored January 28, 2026

ESQL - enable zero terms query match (#143668) (#143925)

Authored March 10, 2026

Use checked exceptions in entitlement constructor rules (#145234) (#145349)

Authored March 31, 2026

[9.3] [Transform] Fix transform producing empty dest index when source query references runtime fields (#142450) (#142829)

Authored February 23, 2026

Make MappingStatsTests more resilient to changes in zlib implementation (#143044) (#143064)

Authored February 25, 2026

[GPU] Bump cuvs-java to 25.12 (#139747) (#139827)

Authored December 19, 2025