Elasticsearch version 7.9.2
editElasticsearch version 7.9.2
editAlso see Breaking changes in 7.9.
Known issues
edit-
SQL: If a
WHERE
clause contains at least two relational operators joined byAND
, of which one is a comparison (<=
,<
,>=
,>
) and another one is an inequality (!=
,<>
), both against literals or foldable expressions, the inequality will be ignored. The workaround is to substitute the inequality with aNOT IN
operator.We have fixed this issue in Elasticsearch 7.10.1 and later versions. For more details, see #65488.
-
Snapshot and restore: If an index is deleted while the cluster is concurrently taking more than one snapshot then there is a risk that one of the snapshots may never complete and also that some shard data may be lost from the repository, causing future restore operations to fail. To mitigate this problem, set
snapshot.max_concurrent_operations: 1
to prevent concurrent snapshot operations:PUT _cluster/settings { "persistent" : { "snapshot.max_concurrent_operations" : 1 } }
This issue is fixed in Elasticsearch versions 7.13.1 and later. It is not possible to repair a repository once it is affected by this issue, so you must restore the repository from a backup, or clear the repository by executing
DELETE _snapshot/<repository name>/*
, or move to a fresh repository. For more details, see #73456.
Deprecations
editEnhancements
edit- Mapping
Bug fixes
edit- Aggregations
- Analysis
- Authentication
- Authorization
-
- Ensure authz operation overrides transient authz headers #61621
- CCR
- EQL
- Engine
- Features/Data streams
-
- Always validate that only a create op is allowed in bulk api for data streams #62766 (issue: #62762)
- Fix NPE when deleting multiple backing indices on a data stream #62274 (issue: #62272)
- Fix data stream wildcard resolution bug in eql search api. #61904 (issue: #60828)
- Prohibit the usage of create index api in namespaces managed by data stream templates #62527
- Features/ILM+SLM
-
- Fix condition in ILM step that cannot be met #62377
- Features/Ingest
-
- Add Missing NamedWritable Registration for ExecuteEnrichPolicyStatus #62364
- Features/Java High Level REST Client
- Infra/Packaging
- Machine Learning
- Mapping
- Network
-
- Log alloc description after netty processors set #62741
- SQL
- Search
- Transform
Upgrades
edit- Infra/Packaging
-
- Upgrade the bundled JDK to JDK 15 #62580