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Elasticsearch Guide [7.10] » Release notes » Elasticsearch version 7.9.1
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Elasticsearch version 7.9.1edit

Also see Breaking changes in 7.9.

Known issuesedit

  • SQL: If a WHERE clause contains at least two relational operators joined by AND, 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 a NOT 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, prevent concurrent snapshot operations by setting snapshot.max_concurrent_operations: 1.

    This issue is fixed in Elasticsearch versions 7.13.1 and later. For more details, see #73456.

New featuresedit

Search

Enhancementsedit

CRUD
  • Log more information when mappings fail on index creation #61577
EQL
  • Make endsWith function use a wildcard ES query wherever possible #61160 (issue: #61154)
  • Make stringContains function use a wildcard ES query wherever possible #61189 (issue: #58922)
Features/Stats
  • Change severity of negative stats messages from WARN to DEBUG #60375
Search
  • Fix handling of alias filter in SearchService#canMatch #59368 (issue: #59367)
  • QL: Add filtering Query DSL support to IndexResolver #60514 (issue: #57358)
Snapshot/Restore
  • Do not access snapshot repo on dedicated voting-only master node #61016 (issue: #59649)

Bug fixesedit

Authentication
  • Call ActionListener.onResponse exactly once #61584
Authorization
  • Relax the index access control check for scroll searches #61446
CCR
  • Relax ShardFollowTasksExecutor validation #60054 (issue: #59625)
  • Set timeout of auto put-follow request to unbounded #61679 (issue: #56891)
  • Set timeout of master node requests on follower to unbounded #60070 (issue: #56891)
Cluster Coordination
  • Restrict testing of legacy discovery to tests #61178 (issue: #61177)
EQL
  • Return sequence join keys in the original type #61268 (issue: #59707)
Features/Data streams
  • "no such index [null]" when indexing into data stream with op_type=index [ISSUE] #60581
  • Data streams: throw ResourceAlreadyExists exception #60518
  • Track backing indices in data streams stats from cluster state #59817
Features/ILM+SLM
  • Fix race in SLM master/cluster state listeners #59801
Features/Ingest
  • Fix handling of final pipelines when destination is changed #59522 (issue: #57968)
  • Fix wrong pipeline name in debug log #58817 (issue: #58478)
  • Fix wrong result when executing bulk requests with and without pipeline #60818 (issue: #60437)
  • Update regex file for es user agent node processor #59697 (issue: #59694)
IdentityProvider
Machine Learning
  • Always write prediction_probability and prediction_score for classification inference #60335
  • Ensure .ml-config index is updated before clearing anomaly job’s finished_time #61064 (issue: #61157)
  • Ensure annotations index mappings are up to date #61107 (issue: #74935)
  • Handle node closed exception in ML result processing #60238 (issue: #60130)
  • Recover data frame extraction search from latest sort key #61544
SQL
Search
  • Disable sort optimization on search collapsing #60838
  • Search fix: query_string regex searches not working on wildcard fields #60959 (issue: #60957)
Snapshot/Restore
  • Cleanly Handle S3 SDK Exceptions in Request Counting #61686 (issue: #61670)
  • Fix Concurrent Snapshot Create+Delete + Delete Index #61770 (issue: #61762)

Upgradesedit

Infra/Core
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