« Release notes Elasticsearch version 8.19.20 »
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Elasticsearch version 8.19.21

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Elasticsearch version 8.19.21

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Coming in 8.19.21.

Also see Breaking changes in 8.19.

Bug fixes

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ES|QL
  • Clamp out-of-range COUNT_DISTINCT precision thresholds to the maximum #157553 (issue: #157549)
  • Fix incorrect results for multi-key SORT with LIMIT #155923
  • Fix missing columns when CIDR_MATCH is used with CASE and casts #156162 (issue: #155979)
Inference
  • Fix Google Vertex AI chat_completion tool calls with non-string arguments #156665 (issue: #156644)
Infra/Core
  • Fix error when truncating long JSON in log and error messages #156382 (issue: #156289)
Infra/Metrics
  • Fix errors from node flush metrics during shutdown #157161
Machine Learning
  • Re-audit datafeed extraction errors periodically #157565
SQL
  • Reject ROUND results that overflow byte or short values #157554 (issue: #157550)
Search
  • Add search.aggs.max_nested_depth to limit aggregation nesting #155743
  • Ensure batched queries always return a response #155908
  • Exclude non-metadata _type from default search hit fields #155706 (issue: #110438)
  • Fix search failures caused by missing query cache shard statistics #157050
  • Keep scroll contexts on transient search queue rejection #155697 (issue: #90912)
  • Return a clear error when search_after contains a null value #132434 (issue: #132370)
  • Return an error for deeply nested aggregations instead of failing the node #155745
Snapshot/Restore
  • Halt the node correctly on fatal errors during S3 multipart uploads #156765
Transform
  • Preserve transform credentials when a deprecated setting is migrated #156191
Vector Search
  • Fix empty inner_hits for nested kNN search on quantized vectors #156332 (issue: #138496)

Enhancements

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Authorization
  • Grant kibana_system privileges on Ping Directory log indices #156029

Upgrades

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FIPS
  • Upgrade Bouncy Castle FIPS to 2.0.2 (FIPS 140-3) and 1.0.2.7 (FIPS 140-2) #156296
Infra/Core
  • Upgrade ASM to 9.10.1 #156213
  • Upgrade the bundled JDK to 26.0.2 #156203
« Release notes Elasticsearch version 8.19.20 »