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Elasticsearch version 8.15.3

Also see Breaking changes in 8.15.

Bug fixes

Aggregations

Don’t validate internal stats if they are empty #113846 (issue: #113811)
Fix needsScore computation in GlobalOrdCardinalityAggregator #113129 (issue: #112975)

Authentication

Enables cluster state role mapper, to include ECK operator-defined role mappings in role resolution #114337

ES|QL

ES|QL: Ensure minimum capacity for PlanStreamInput caches #114116
ES|QL: Skip CASE function from InferIsNotNull rule checks #113123 (issue: #112704)
[ESQL] Fix init value in max float aggregation #113699
[ESQL] Support datetime data type in Least and Greatest functions #113961

Machine Learning

Fix check on E5 model platform compatibility #113437 (issue: #113577)
Handle parsing ingest processors where definition is not a object #113697 (issue: #113615)
[ML][backport] Warn for model load failures if they have a status code <500 #113410
[M] Fix error message formatting #113266

Search

Fix analyzed wildcard query in simple_query_string when disjunctions is empty #114264 (issue: #114185)
Fix collapse interaction with stored fields #112761 (issue: #112646)

Enhancements

Machine Learning

Write downloaded model parts async #111684

Upgrades

Snapshot/Restore

Upgrade protobufer to 3.25.5 #113869

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https://www.elastic.co/guide/en/elasticsearch/reference/8.17/release-notes-8.15.3.html