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Elasticsearch version 7.17.7

Also see Breaking changes in 7.17.

Known issues

Parsing a request when the last element in an array is filtered out (for instance using _source_includes) fails. This is due to a bug in Jackson parser. Fixed in Elasticsearch 8.6.1 (#91456)
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

Allocation

Fix debug mode in MaxRetryAllocationDecider #89973

Authentication

Fix double sending of response in TransportOpenIdConnectPrepareAuthenticationAction #89930

ILM+SLM

Copy isHidden during ILM alias swap #89650 (issue: #89604)

Infra/Core

Extend the date rounding logic to be conditional #89693 (issues: #89096, #58986)
Fix date rounding for date math parsing #90458 (issue: #90187)

Ingest Node

Fix pipeline id not being present in ingest metadata inside on_failure block #89632

Machine Learning

Do not retain categorization tokens when existing category matches #2398

Network

Fix memory leak when double invoking RestChannel.sendResponse #89873

Ranking

Avoid negative scores with cross_fields type #89016 (issue: #44700)

Rollup

Fork TransportRollupCapsAction to management threadpool #89803

Search

Safeguard RegExp use against StackOverflowError #84624 (issue: #82923)

Watcher

Allow xpack.notification.email.account.domain_allowlist to be set dynamically #90426 (issue: #89913)
Handling timeout exceptions on watcher startup #90421 (issue: #44981)

Upgrades

Packaging

Update OpenJDK to 18.0.2.1 #89535 (issue: #89531)
Upgrade bundled JDK to Java 19 #90571

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https://www.elastic.co/guide/en/elasticsearch/reference/7.17/release-notes-7.17.7.html