IMPORTANT: No additional bug fixes or documentation updates
will be released for this version. For the latest information, see the
current release documentation.
Elasticsearch version 6.6.0
editElasticsearch version 6.6.0
editAlso see Breaking changes in 6.6..
Breaking changes
edit- Cross-cluster replication
- Ranking
- Search
- Watcher
Breaking Java changes
editDeprecations
edit- Aggregations
- Core
- Features
- Mapping
- Scripting
- Search
- Security
- Settings
- Watcher
New features
edit- Aggregations
- Analysis
- Index Lifecycle Management
-
- Adds Index lifecycle feature #35193
- Java High Level REST Client
- Java Low Level REST Client
- Geo
- Machine learning
- Search
- SQL
Enhancements
edit- Aggregations
-
- Enforce max_buckets limit only in the final reduction phase #36152 (issues: #32125, #35921)
- Histogram aggs: add empty buckets only in the final reduce step #35921
- Handles exists query in composite aggs #35758
- Added parent validation for auto date histogram #35670
- Allow unmapped fields in composite aggregations #35331 (issue: #35317)
- Refactor children aggregator into a generic ParentJoinAggregator #34845 (issue: #34210)
- Add parent-aggregation to parent-join module #34210 (issue: #9705)
- Analysis
- Audit
-
- Add "request.id" to file audit logs #35536
- Authentication
-
- Invalidate Token API enhancements - HLRC #36362
- Add DEBUG/TRACE logs for LDAP bind #36028
- Add Tests for findSamlRealm #35905
- Add realm information for Authenticate API #35648
- Formal support for "password_hash" in Put User #35242 (issue: #34729)
- Enhance Invalidate Token API #35388 (issues: #34556, #35115)
- Authorization
- Build
- Core
- Cross-cluster replication
-
- Add time since last auto follow fetch to auto follow stats #36542 (issues: #33007, #35895)
- Clean followed leader index UUIDs in auto follow metadata #36408 (issue: #33007)
- Change AutofollowCoordinator to use wait_for_metadata_version #36264 (issues: #33007, #35895)
- Refactor AutoFollowCoordinator to track leader indices per remote cluster #36031 (issues: #33007, #35895)
- Refactor auto follow coordinator #35895 (issue: #33007)
- CRUD
-
- Document Seq No powered optimistic concurrency control #37284 (issues: #10708, #36148)
- Rename seq# powered optimistic concurrency control parameters to ifSeqNo/ifPrimaryTerm #36757 (issues: #10708, #36148)
- Expose Sequence Number based Optimistic Concurrency Control in the rest layer #36721 (issues: #10708, #36148)
- Add doc’s sequence number + primary term to GetResult and use it for updates #36680 (issues: #10708, #36148)
- Add seq no powered optimistic locking support to the index and delete transport actions #36619 (issues: #10708, #36148)
- Distributed
-
- Allow asynchronous block operations to be delayed in IndexShardOperationPermits #35999 (issues: #35540, #35850)
- TransportResyncReplicationAction should not honour blocks #35795 (issues: #35332, #35597)
- Add global and index level blocks to IndexSettings #35695 (issues: #35332, #35597)
- Expose all permits acquisition in IndexShard and TransportReplicationAction #35540 (issue: #33888)
- Add a java level freeze/unfreeze API #35353 (issues: #34352, #34357)
- Check blocks while having index shard permit in TransportReplicationAction #35332 (issue: #33888)
- Apply masterNodeTimeout to MasterNodeRequest transmission #35235
- Engine
-
- Add sequence numbers based optimistic concurrency control support to Engine #36467 (issues: #10708, #36148)
- Require soft-deletes when access changes snapshot #36446
- Use delCount of SegmentInfos to calculate numDocs #36323
- Always configure soft-deletes field of IndexWriterConfig #36196 (issue: #36141)
-
Always return false from
refreshNeeded
on ReadOnlyEngine #35837 (issue: #35785) -
Add a
_freeze
/_unfreeze
API #35592 (issue: #34352) - Engine.newChangesSnapshot may cause unneeded refreshes if called concurrently #35169
- Do not alloc full buffer for small change requests #35158
- Add IndexShardOperationPermits.asyncBlockOperations(ActionListener<Releasable>) #34902 (issue: #33888)
- Add a frozen engine implementation #34357 (issue: #34352)
- Features
-
- Deprecation check for discovery configuration #36666 (issue: #36024)
- Simplify deprecation issue levels #36326
- Deprecation check for tribe node #36240 (issue: #36024)
-
Deprecation check for
:
in Cluster/Index name #36185 (issue: #36024) - Deprecation check for renamed bulk threadpool settings #36662 (issue: #36024)
- Deprecation check for audit log prefix settings #36661 (issue: #36024)
- Deprecation check for classic similarity #36577 (issue: #36024)
- Deprecation check for HTTP pipelining #36521 (issue: #36024)
- Deprecation check for index threadpool #36520 (issue: #36024)
- Deprecation check for percolator.map_unmapped_fields_as_string #36460 (issue: #36024)
- Deprecation check for http.enabled setting #36394 (issues: #29601, #36024)
- Deprecation check for File Discovery plugin #36190 (issue: #36024)
- Geo
- Ingest
- Java High Level REST Client
-
- Add HLRC support for pause follow API #35216 (issue: #33824)
- Add security Create Token API #34791
- Add start rollup job support to HL REST Client #34623 (issue: #29827)
- Add security authenticate API #33552
- Add get users action #36332 (issue: #29827)
- Add delete template API #36320 (issue: #27205)
- Implement get-user-privileges API #36292
- Get Deprecation Info API #36279 (issue: #29827)
- Added support for Follow Stats API #36253 (issue: #33824)
- Added support for CCR Stats API #36213 (issue: #33824)
- Put Role #36209 (issue: #29827)
- Add index templates exist API #36132 (issue: #27205)
- Add support for CCR Get Auto Follow Pattern apis #36049 (issue: #33824)
- Add support for CCR Delete Auto Follow Pattern API #35981 (issue: #33824)
- Remove fromXContent from IndexUpgradeInfoResponse #35934
- Add delete expired data API #35906 (issue: #29827)
- Execute watch API #35868 (issue: #29827)
- Add ability to put user with a password hash #35844 (issue: #35242)
- Add ML find file structure API #35833 (issue: #29827)
- Add support for get roles API #35787 (issue: #29827)
- Add support for CCR Put Auto Follow Pattern API #35780 (issue: #33824)
- XPack ML info action #35777 (issue: #29827)
- ML Delete event from Calendar #35760 (issue: #29827)
- Add ML revert model snapshot API #35750 (issue: #29827)
- ML Get Calendar Events #35747 (issue: #29827)
-
Add high-level REST client API for
_freeze
and_unfreeze
#35723 (issue: #34352) - Fix issue in equals impl for GlobalOperationPrivileges #35721
- ML Delete job from calendar #35713 (issue: #29827)
- ML Add Event To Calendar API #35704 (issue: #29827)
- Add ML update model snapshot API (#35537) #35694 (issue: #29827)
- Add support for CCR Unfollow API #35693 (issue: #33824)
- Clean up PutLicenseResponse #35689 (issue: #35547)
- Clean up StartBasicResponse #35688 (issue: #35547)
- Add support for put privileges API #35679
- Add Job to Calendar API #35666 (issue: #29827)
- Add support for CCR Resume Follow API #35638 (issue: #33824)
- Add support for get application privileges API #35556 (issue: #29827)
- Clean up XPackInfoResponse class and related tests #35547
- Add parameters to stopRollupJob API #35545 (issue: #34811)
- Add ML delete model snapshot API #35537 (issue: #29827)
- Add get watch API #35531 (issue: #29827)
- Add ML Update Filter API #35522 (issue: #29827)
- Add ML get filters api #35502 (issue: #29827)
- Add ML get model snapshots API #35487 (issue: #29827)
- Add "_has_privileges" API to Security Client #35479 (issue: #29827)
- Add Delete Privileges API to HLRC #35454 (issue: #29827)
- Add support for CCR Put Follow API #35409
- Add ML delete filter action #35382 (issue: #29827)
- Add delete user action #35294 (issue: #29827)
- HLRC for _mtermvectors #35266 (issues: #27205, #33447)
- Reindex API with wait_for_completion false #35202 (issue: #27205)
- Add watcher stats API #35185 (issue: #29827)
- Add ML API PUT filter #35175 (issue: #29827)
- HLRC support for getTask #35166 (issue: #27205)
- Add support for the clear realm cache API #35163 (issue: #29827)
- Add InvalidateToken security API #35114 (issue: #29827)
- Add GetRollupIndexCaps API #35102 (issue: #29827)
- Migration api - upgrade #34898 (issue: #29827)
- Add Update datafeed API #34882 (issue: #29827)
- Add stop rollup job support to HL REST Client #34702 (issue: #29827)
- Bulk Api support for global parameters #34528 (issue: #26026)
- Add support for source exists API #34519 (issue: #27205)
- Add document _count API support to Rest High Level Client. #34267 (issue: #27205)
- Add delete rollup job support to HL REST Client #34066 (issue: #29827)
- HLRC API for _termvectors #33447 (issue: #27205)
- Add support for get license basic/trial status API #33176 (issue: #29827)
- Small corrections to HLRC doc for _termvectors #35221 (issue: #33447)
- Java Low Level REST Client
-
- On retry timeout add root exception #25576
- Machine Learning
-
- Create the machine learning annotations index #36731 (issue: #33376)
- Add cluster setting to enable/disable config migration #36700 (issue: #32905)
-
Enable the use of endpoints starting with
_ml
instead of_xpack/ml
#36373 (issue: #36315) - Add audits when deprecation warnings occur while datafeeds start #36233
- Add lazy parsing for DatafeedConfig:Aggs,Query #36117
- Add support for rollup indexes in datafeeds #34654
- Monitoring
- Network
- Packaging
- Plugins
-
- Plugin install: don’t print download progress in batch mode #36361
- Recovery
- Rollup
- Scripting
- Search
-
- Use SearchRequest copy constructor in ExpandSearchPhase #36772 (issue: #36641)
- Add copy constructor to SearchRequest #36641 (issue: #32125)
- Add raw sort values to SearchSortValues transport serialization #36617 (issue: #32125)
-
Warn when using
use_dis_max
inmulti_match
#36614 (issue: #36488) - Add sort and collapse info to SearchHits transport serialization #36555 (issue: #32125)
- Add default methods to DocValueFormat #36480
- Extend field caps API to mark meta fields #36309
- Respect indices options on _msearch #35887
- Allow efficient can_match phases on frozen indices #35431 (issues: #34352, #34357)
-
Apply
ignore_throttled
also to concrete indices #35335 (issue: #34354) - Adapt field limit deprecation warning #35302 (issue: #35284)
- Upgrade 6.x to lucene-7.6.0-snapshot-f9598f335b #35225
- Prevent throttled indices to be searched through wildcards by default #34354 (issues: #33732, #34352)
- check for null argument is already done in splitStringByCommaToArray #34268
- has_parent builder: exception message/param fix #31182
- Security
- Snapshot/Restore
- SQL
-
-
Make
FULL
non-reserved keyword in the grammar #37377 (issue: #37376) - Extend the ODBC metric by differentiating between 32 and 64bit platforms #36753 (issue: #36740)
- Fix wrong appliance of StackOverflow limit for IN #36724 (issue: #36592)
- Introduce NOW/CURRENT_TIMESTAMP function #36562 (issue: #36534)
- Move requests' parameters to requests JSON body #36149 (issue: #35992)
- Make INTERVAL millis optional #36043 (issue: #36032)
- Implement data type verification for conditionals #35916 (issue: #35907)
- Implement GREATEST and LEAST functions #35879 (issue: #35878)
-
Implement null safe equality operator
<=>
#35873 (issue: #35871) - SYS COLUMNS returns ODBC specific schema #35870 (issue: #35376)
- Polish grammar for intervals #35853
- Add filtering to SYS TYPES #35852 (issue: #35342)
- Implement NULLIF(expr1, expr2) function #35826 (issue: #35818)
- Lock down JDBC driver #35798 (issue: #35437)
- Implement NVL(expr1, expr2) #35794 (issue: #35782)
- Implement ISNULL(expr1, expr2) #35793 (issue: #35781)
- Implement IFNULL variant of COALESCE #35762 (issue: #35749)
- XPack FeatureSet functionality #35725 (issue: #34821)
- Perform lazy evaluation of mismatched mappings #35676 (issues: #35659, #35675)
- Improve validation of unsupported fields #35675 (issue: #35673)
- Move internals from Joda to java.time #35649 (issue: #35633)
- Improve CircuitBreaker logic for SqlParser #35300 (issue: #35299)
- Upgrade jline to version 3.8.2 #35288
- New SQL CLI logo #35261
- Introduce Coalesce function #35253 (issue: #35060)
- Optimizer rule for folding nullable expressions #35080 (issue: #34826)
-
Improve painless script generated from
IN
#35055 (issue: #34750) - Implement CAST between STRING and IP #34949 (issue: #34799)
- Fix function args verification and error msgs #34926 (issues: #33469, #34752)
- Handle X-Pack or X-Pack SQL not being available in a more graceful way #34736 (issue: #30009)
-
Make
- Stats
- Task Management
Bug fixes
edit- Aggregations
-
- Fix MultiValuesSourceFieldConfig toXContent #36525 (issue: #36474)
- Cache the score of the parent document in the nested agg #36019 (issues: #34555, #35985)
- Correct implemented interface of ParsedReverseNested #35455 (issue: #35449)
- Handle IndexOrDocValuesQuery in composite aggregation #35392
-
Preserve
format
when aggregation contains unmapped date fields #35254 (issue: #31760) - Check self references in metric agg after last doc collection (#33593) #34001
- Audit
- Authentication
- Build
- Circuit Breakers
- Core
-
- Revert back to joda’s multi date formatters #36814 (issues: #36447, #36602)
- Fix CompositeBytesReference#slice to not throw AIOOBE with legal offsets. #35955 (issue: #35950)
- Suppress CachedTimeThread in hot threads output #35558 (issue: #23175)
- Upgrade to Joda 2.10.1 #35410 (issue: #33749)
- XContent: Check for bad parsers #34561 (issue: #34351)
- Cross-cluster replication
-
- Add fatal_exception field for ccr stats in monitoring mapping #37563
- When removing an AutoFollower also mark it as removed. #37402 (issue: #36761)
- Make shard follow tasks more resilient for restarts #37239 (issue: #37231)
- Resume follow Api should not require a request body #37217 (issue: #37022)
- Report error if auto follower tries auto follow a leader index with soft deletes disabled #36886 (issue: #33007)
- Remote cluster license checker and no license info. #36837 (issue: #36815)
- Make CCR resilient against missing remote cluster connections #36682 (issues: #36255, #36667)
- Fix follow stats API’s follower index filtering feature #36647
- AutoFollowCoordinator and follower index already created #36540 (issue: #33007)
- AutoFollowCoordinator should tolerate that auto follow patterns may be removed #35945 (issue: #35937)
- Only auto follow indices when all primary shards have started #35814 (issue: #35480)
- Avoid NPE in follower stats when no tasks metadata #35802
- Fix the names of CCR stats endpoints in usage API #35438
- CRUD
- Distributed
- Engine
- Features
- Geo
-
- More robust handling of ignore_malformed in geoshape parsing #35603 (issues: #34047, #34498)
- Better handling of malformed geo_points #35554 (issue: #35419)
- Enables coerce support in WKT polygon parser #35414 (issue: #35059)
- Further improve robustness of geo shape parser for malformed shapes #34498 (issues: #31449, #34047)
- Index lifecycle management
-
-
Remove
indexing_complete
when removing policy #36620
-
Remove
- Index APIs
- Ingest
- Machine Learning
-
- Fix cause of "Sample out of bounds" error message. #335
- Fix hang when closing a job or creating a forecast. This problem occurs if you created a forecast for a large job and temporary storage was not cleaned up. #352 (issue: #350)
- Wait for autodetect to be ready in the datafeed #37349 (issues: #36810, #37227)
- Stop datafeeds when their jobs are stale #37227 (issue: #36810)
- Order get job stats API response by job id #36841 (issue: #36683)
- Mapping
-
- Make sure to accept empty unnested mappings in create index requests. #37089
- Monitoring
- Network
- Packaging
- Ranking
- Recovery
-
- Register ResyncTask.Status as a NamedWriteable #36610
- Rollup
- Scripting
-
- Properly support no-offset date formatting #36316 (issue: #36306)
- [Painless] Generate Bridge Methods #36097
- Fix serialization bug in painless execute api request #36075 (issue: #36050)
- Actually add joda time back to whitelist #35965 (issue: #35915)
- Add back joda to whitelist #35915 (issue: #35913)
- [Painless] Partially fixes def boxed types casting #35563 (issue: #35351)
- Add back lookup vars in score script #34833
- Search
-
- Inner hits fail to propagate doc-value format. (#36310) #36355 (issue: #36310)
- Fix custom AUTO issue with Fuzziness#toXContent #35807 (issue: #33462)
- Fix analyzed prefix query in query_string #35756 (issue: #31702)
- Fix problem with MatchNoDocsQuery in disjunction queries #35726 (issue: #34708)
- Fix phrase_slop in query_string query #35533 (issue: #35125)
- Add a More Like This query routing requirement check (#29678) #33974
- Security
- Settings
- Snapshot/Restore
- SQL
-
- Fix issue with field names containing "." #37364 (issue: #37128)
- Proper handling of COUNT(field_name) and COUNT(DISTINCT field_name) #37254 (issue: #30285)
- Fix COUNT DISTINCT filtering #37176 (issue: #37086)
- Fix issue with wrong NULL optimization #37124 (issue: #35872)
- Count distinct doesn’t recognize that a string field has a keyword version #37176 (issue: #37087)
- Handle the bwc Joda ZonedDateTime scripting class in Painless #37024 (issue: #37023)
- Fix bug regarding histograms usage in scripting #36866
- Fix issue with always false filter involving functions #36830 (issue: #35980)
- Protocol returns ISO 8601 String formatted dates instead of Long for JDBC/ODBC requests #36800 (issue: #36756)
- Fix translation of LIKE/RLIKE keywords #36672 (issues: #36039, #36584)
- Scripting support for casting functions CAST and CONVERT #36640 (issue: #36061)
- Fix translation to painless for conditionals #36636 (issue: #36631)
- Concat should be always not nullable #36601 (issue: #36169)
- Fix MOD() for long and integer arguments #36599 (issue: #36364)
- Fix issue with complex HAVING and GROUP BY ordinal #36594 (issue: #36059)
- Be lenient for tests involving comparison to H2 but strict for csv spec tests #36498 (issue: #36483)
- Non ISO 8601 versions of DAY_OF_WEEK and WEEK_OF_YEAR functions #36358 (issue: #36263)
- Do not ignore all fields whose names start with underscore #36214 (issue: #36206)
- SUM() and LIKE condition doesn’t work anymore #36672 (issue: #36161)
- Fix issue with wrong data type for scripted Grouping keys #35969 (issue: #35662)
- Fix translation of math functions to painless #35910 (issue: #35654)
- Build: Fix jdbc jar to include deps #35602
- Fix query translation for scripted queries #35408 (issue: #35232)
- Clear the cursor if nested inner hits are enough to fulfill the query required limits #35398 (issue: #35176)
- Fix null handling for AND and OR in SELECT #35277 (issue: #35240)
-
Handle null literal for AND and OR in
WHERE
#35236 (issue: #35088) - Introduce NotEquals node to simplify expressions #35234 (issues: #35210, #35233)
- Introduce IsNull node to simplify expressions #35206 (issues: #34876, #35171)
- Handle wildcard expansion on incorrect fields #35134 (issue: #35092)
- Fix null handling for IN ⇒ painless script #35124 (issues: #35108, #35122)
- Register missing processors #35121 (issue: #35119)
- Fix NPE thrown if HAVING filter evals to null #35108 (issue: #35107)
- Proper handling of nested fields at the beginning of the columns list #35068 (issue: #32951)
- Fix incorrect AVG data type #34948 (issue: #33773)
-
Add
CAST
andCONVERT
toSHOW FUNCTIONS
#34940 (issue: #34939) - Handle aggregation for null group #34916 (issue: #34896)
- Provide null-safe scripts for Not and Neg #34877 (issue: #34848)
- Return error with ORDER BY on non-grouped. #34855 (issue: #34590)
- Fix negation of equals comparison. #34680 (issue: #34558)
- CAST doesn’t work in ORDER BY. #36640 (issue: #34557)
- COUNT(column) takes into account NULLs #37254 (issue: #34549)
- Watcher