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Elasticsearch version 7.17.8

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

EQL

Fix serialization of resultPosition in EqlSearchRequest #91497
Limit CCS to v 7.15 #91834 (issue: #91762)

Infra/Core

Add trace.id to request trace logs #91772 (issue: #88174)
DoPrivileged in ElasticsearchEncaughtExceptionHandler and check modify thread #91704 (issue: #91650)

Ingest Node

Set the enrich maintenance cluster lifecycle listener only once #90486

Machine Learning

ML stats failures should not stop the usage API working #91917 (issue: #91893)

Search

Fix integer overflow in AsyncTaskIndexService #91044

Transform

Make transform _preview request cancellable #91313 (issue: #91286)

Enhancements

Infra/Core

Check for unassigned shards on node shutdown #91297 (issue: #88635)
Extend systemd startup timeout to 900s #91338

Snapshot/Restore

Update HDFS Repository to HDFS 3.3.3 #88039

TLS

Support SAN/dnsName for restricted trust #91946

Upgrades

Packaging

Update bundled JDK to Java 19.0.1 #91025 (issue: #91010)

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https://www.elastic.co/guide/en/elasticsearch/reference/7.17/release-notes-7.17.8.html