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Elasticsearch version 7.17.19

Also see Breaking changes in 7.17.

Known issues

Due to a bug in the bundled JDK 22 nodes might crash abruptly under high memory pressure. We recommend downgrading to JDK 21.0.2 asap to mitigate the issue.
The deprecated index.mapper.dynamic setting can break your cluster. It can only be set using the Update index settings API. Symptoms include nodes failing to start or shards failing to allocate. Do not use this setting in versions prior to 7.17.22. The bug is fixed in 7.17.22. (issue: #109160)

Bug fixes

Ingest Node

Adding executedPipelines to the IngestDocument copy constructor #105427

Machine Learning

Detect 8.x ML nodes correctly #105653

Search

Force execution of SearchService.Reaper #106544 (issue: #106543)
Update to latest Lucene bugfix version 8.11.3 #106365

Watcher

Handling exceptions on watcher reload #105442 (issue: #69842)

Enhancements

Ingest Node

Adding a custom exception for problems with the graph of pipelines to be applied to a document #105196
Improving the performance of the ingest simulate verbose API #105265
Limiting the number of nested pipelines that can be executed #105428

Upgrades

Infra/Core

Upgrade joda time to 2.12.6 #104720

Ingest Node

Upgrade mime4j on the 7.17 line #106380

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https://www.elastic.co/guide/en/elasticsearch/reference/7.17/release-notes-7.17.19.html