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Elasticsearch v9.4.5

Elasticsearch: v9.4.5 Release

Release date:
August 5, 2026
Previous version:
v9.4.4 (released July 15, 2026)
Magnitude:
4,016 Diff Delta
Contributors:
39 total committers
Data confidence:
Commits:
124 impacting commits

124 Commits in this Release

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

[9.4] ESQL: Don't accidentally add flattened subfields (#155840)
Authored August 5, 2026
[9.4] ESQL: Purge INSIST from the codebase (#153845) (#154081)
Authored July 16, 2026
[9.4] [Inference API] Deploy text embedding models before validation call (#153886) (#154986)
Authored July 24, 2026
Tighten up `Expect: 100-continue` handling (#154546) (#154611)
Authored July 21, 2026
[9.4] Fix view+alias data deduplication in ViewResolver (#154694) (#154945)
Authored July 24, 2026
Refactor RecoveryIT to use junit rule best approach (#151839) (#154564)
Authored July 21, 2026
[9.4] ESQL: Fix one of the causes of losing warnings (#154016) (#154138)
Authored July 17, 2026
[9.4] Upgrade the version of jackson to 2.18.9 (#154569) (#154686)
Authored July 22, 2026
[9.4] Account scripted-field heap in request circuit breaker (#152718) (#154379)
Authored July 20, 2026
[9.4] [Inference API] Delete default endpoints using master node action only (#154735) (#154890)
Authored July 24, 2026
Bug fix: default AMD value resolution in FromAggregateMetricDouble (#153805) (#154680)
Authored July 22, 2026
Reserve regexp automaton memory on the circuit breaker before building it (#155076) (#155245)
Authored July 28, 2026
9.4 backport propagate nullable fixes (#155596)
Authored July 31, 2026
Fix instability of SharedBlobCacheServiceTests.testFetchRegion (#153500) (#155644)
Authored August 4, 2026
Fix EUCLIDEAN score clamping order in BBQ vector scorer (#155630) (#155692)
Authored August 3, 2026
Fix flaky ES92GpuHnswWriteGraphTests float vector comparison (#155935) (#155957)
Authored August 5, 2026
Cache little-endian float layout in DiskBBQ scalar corrections loop (#154373) (#155489)
Authored July 30, 2026
[9.4] Trip request breaker on phrase and term suggesters (#154837) (#155631)
Authored July 31, 2026
[9.4] ESQL: Fix FROM_BASE64 generating wrong non-UTF strings (#155757)
Authored August 4, 2026
Unmute encryption-at-rest suite timeout tests on 9.4 (#155558)
Authored July 31, 2026
ESQL: Avoid MAX_INT loop on Repeat (#154295) (#154562)
Authored July 21, 2026
Upgrade the version of log4j to 2.26.1 (#154115) (#154548)
Authored July 21, 2026
Allow GC of closed search contexts in ES|QL (#155418) (#155438)
Authored July 29, 2026
Remove 9.3 from snapshot bwcs after 9.5 was released (#155966)
Authored August 5, 2026
Backport apache http client 5 upgrade (#155666)
Authored August 2, 2026
Increase suite timeouts for encryption-at-rest CI step (#154076) (#154106)
Authored July 16, 2026
ESQL: Unmutes some ESQL warnings tests (#155366)
Authored July 29, 2026
Fix bbq_flat yaml test vector scores (#153444) (#154101)
Authored July 16, 2026
[9.4] Limit number_of_fragments in highlighting to prevent OOM crash (#155507) (#155947)
Authored August 5, 2026
LookupJoinParserTests: Don't generate unquoted kw (#151854) (#155347)
Authored July 29, 2026
[9.4] ESQL: Re-type a TEXT data type to KEYWORD to fulfill the CASE resolveType contract (#154287) (#154393)
Authored July 20, 2026
unmute #152601 (#154263)
Authored July 17, 2026
Updating simulated exception thrown in RRF and linear retriever IT tests to avoid shutting down the shard (#151105) (#154517)
Authored July 21, 2026
[9.4] Fix `TransportClusterStateActionDisruptionIT` (#155461) (#155514)
Authored July 30, 2026
Remove `testChildrenTasksCancelledOnTimeout` (#155344) (#155362)
Authored July 29, 2026
Fix flaky ShardLimitValidatorTests.testValidateShardLimitOpenIndices (#155235)
Authored July 28, 2026
Unmute search.vectors/42_knn_search_bbq_flat (#155287)
Authored July 28, 2026
Fix zero-width tty in credential auto-config tests (#154248) (#154496)
Authored July 21, 2026
[9.4] Fix testOverShardLimit (#154555)
Authored July 23, 2026
Fix CC-unsafe provider in ElasticsearchCluster.module(TaskProvider<Sync>) (#154170) (#154296)
Authored July 19, 2026

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Top Contributors in v9.4.5

ivancea
jonathan-buttner
GalLalouche
michalborek
DaveCTurner
drempapis
craigtaverner
piotrsulkowski-elastic
ChrisHegarty
nik9000

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