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Elasticsearch version 7.1.1

Also see Breaking changes in 7.1.

Known issues

Applying deletes or updates on an index after it has been shrunk may corrupt the index. In order to prevent this issue, it is recommended to stop shrinking read-write indices. For read-only indices, it is recommended to force-merge indices after shrinking, which significantly reduces the likeliness of this corruption in the case that deletes/updates would be applied by mistake. This bug is fixed in Elasticsearch 7.7 and later versions. More details can be found on the corresponding issue.
Indices created in 6.x with date and date_nanos fields using formats that are incompatible with java.time patterns will cause parsing errors, incorrect date calculations or wrong search results. https://github.com/elastic/elasticsearch/pull/52555 This is fixed in Elasticsearch 7.7 and later versions.

Bug fixes

Distributed

Avoid unnecessary persistence of retention leases #42299
Execute actions under permit in primary mode only #42241 (issues: #40386, #41686)

Infra/REST API

Remove deprecated _source_exclude and _source_include from get API spec #42188

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https://www.elastic.co/guide/en/elasticsearch/reference/7.17/release-notes-7.1.1.html