IMPORTANT: No additional bug fixes or documentation updates will be released for this version. For the latest information, see the current release documentation.

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Elasticsearch version 7.8.1

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Elasticsearch version 7.8.1

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Also see Breaking changes in 7.8.

Known issues

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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.

Breaking changes

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License

Display enterprise license as platinum in /_xpack #58217

New features

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SQL

Implement SUM, MIN, MAX, AVG over literals #56786 (issues: #41412, #55569)

Enhancements

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Authorization

Add read privileges for observability-annotations for apm_user #58530 (issues: #64796, #69642, #69881)

Features/Indices APIs

Change "apply create index" log level to DEBUG #56947
Make noop template updates be cluster state noops #57851 (issue: #57662)
Rename template V2 classes to ComposableTemplate #57183 (issue: #56609)

Machine Learning

Add exponent output aggregator to inference #58933

Snapshot/Restore

Allow read operations to be executed without waiting for full range to be written in cache #58728 (issues: #58164, #58477)
Allows SparseFileTracker to progressively execute listeners during Gap processing #58477 (issue: #58164)
Do not wrap CacheFile reentrant r/w locks with ReleasableLock #58244 (issue: #58164)
Use snapshot information to build searchable snapshot store MetadataSnapshot #56289

Transform

Improve update API #57648 (issue: #56499)

Bug fixes

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CCR

Ensure CCR partial reads never overuse buffer #58620

Cluster Coordination

Suppress cluster UUID logs in 6.8/7.x upgrade #56835
Timeout health API on busy master #57587

Engine

Fix realtime get of numeric fields from translog #58121 (issue: #57462)

Features/ILM+SLM

Fix negative limiting with fewer PARTIAL snapshots than minimum required #58563 (issue: #58515)

Features/Indices APIs

Fix issue reading template mappings after cluster restart #58964 (issues: #58521, #58643, #58883)
ITV2: disallow duplicate dynamic templates #56291 (issues: #28988, #53101, #53326)

Features/Stats

Fix unnecessary stats warning when swap is disabled #57983

Geo

Fix max-int limit for number of points reduced in geo_centroid #56370 (issue: #55992)
Re-enable support for array-valued geo_shape fields. #58786

Infra/Core

Week based parsing for ingest date processor #58597 (issue: #58479)

Machine Learning

Allow unran/incomplete forecasts to be deleted for stopped/failed jobs #57152 (issue: #56419)
Fix inference .ml-stats-write alias creation #58947 (issue: #58662)
Fix race condition when force stopping data frame analytics job #57680
Handle broken setup with state alias being an index #58999 (issue: #58482)
Mark forecasts for force closed/failed jobs as failed #57143 (issue: #56419)
Better interrupt handling during named pipe connection #1311
Trap potential cause of SIGFPE #1351 (issue: #1348)
Correct inference model definition for MSLE regression models #1375
Fix cause of SIGSEGV of classification and regression #1379
Fix restoration of change detectors after seasonality change #1391
Fix potential SIGSEGV when forecasting #1402 (issue: #1401)

Network

Close channel on handshake error with old version #56989 (issue: #54337)

Percolator

Fix nested document support in percolator query #58149 (issue: #52850)

Recovery

Fix recovery stage transition with sync_id #57754 (issues: #57187, #57708)

SQL

Fix behaviour of COUNT(DISTINCT <literal>) #56869
Fix bug in resolving aliases against filters #58399 (issues: #57270, #57417)
Fix handling of escaped chars in JDBC connection string #58429 (issue: #57927)
Handle MIN and MAX functions on dates in Painless scripts #57605 (issue: #57581)

Search

Ensure search contexts are removed on index delete #56335
Filter empty fields in SearchHit#toXContent #58418 (issue: #41656)
Fix exists query on unmapped field in query_string #58804 (issues: #55785, #58737)
Fix handling of terminate_after when size is 0 #58212 (issue: #57624)
Fix possible NPE on search phase failure #57952 (issues: #51708, #57945)
Handle failures with no explicit cause in async search #58319 (issues: #57925, #58311)
Improve error handling in async search code #57925 (issue: #58995)
Prevent BigInteger serialization errors in term queries #57987 (issue: #57917)
Submit async search to not require read privilege #58942

Snapshot/Restore

Fix Incorrect Snapshot Shar Status for DONE Shards in Running Snapshots #58390
Fix Memory Leak From Master Failover During Snapshot #58511 (issue: #56911)
Fix NPE in SnapshotService CS Application #58680
Fix Snapshot Abort Not Waiting for Data Nodes #58214
Remove Overly Strict Safety Mechnism in Shard Snapshot Logic #57227 (issue: #57198)

Task Management

Cancel persistent task recheck when no longer master #58539 (issue: #58531)
Ensure unregister child node if failed to register task #56254 (issues: #54312, #55875)

Transform

Fix page size return in cat transform, add dps #57871 (issues: #56007, #56498)

Upgrades

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Infra/Core

Upgrade to JNA 5.5.0 #58183

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