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Elasticsearch version 7.17.18

Also see Breaking changes in 7.17.

Known issues

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

Better handling of async processor failures #104289 (issue: #101921)
Ingest correctly handle upsert operations and drop processors together #104585 (issue: #36746)

Snapshot/Restore

Fix deleting index during snapshot finalization #103817 (issue: #101029)

Upgrades

Snapshot/Restore

[7x] upgrade aws client depdencies #104346

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https://www.elastic.co/guide/en/elasticsearch/reference/7.17/release-notes-7.17.18.html