IMPORTANT: No additional bug fixes or documentation updates will be released for this version. For the latest information, see the current release documentation.
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Elastic Docs ›Elasticsearch Guide [8.16] ›Release notes

Elasticsearch version 8.16.6

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IMPORTANT: This documentation is no longer updated. Refer to Elastic's version policy and the latest documentation.

Elasticsearch version 8.16.6

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Also see Breaking changes in 8.16.

Bug fixes

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Infra/Core
  • Prevent rare starvation bug when using scaling EsThreadPoolExecutor with empty core pool size. #124732 (issue: #124667)
Machine Learning
  • Migrate model_version to model_id when parsing persistent elser inference endpoints #124769 (issue: #124675)
Search
  • Do not let ShardBulkInferenceActionFilter unwrap / rewrap ESExceptions #123890
  • Revert fail-fast disconnect strategy for _resolve/cluster #124241

Upgrades

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Security
  • Bump nimbus-jose-jwt to 10.0.2 #124544

Known issues

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ES|QL
  • Some valid queries using an ENRICH command can fail when a match field is used that is absent from some indices or shards, either with a 500 status code due to NullPointerException or ClassCastException or with a 400 status code and IllegalArgumentException. This is fixed in #126187.
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