edit edit
Packaging
Configure heap dump path out of the box #26755 (issue: #26665 )
Query DSL
Remove deprecated type and slop field in match query #26720
Remove several parse field deprecations in query builders #26711
Remove deprecated parameters from ids_query #26508
edit
Plugins
Plugins: Add backcompat for sha1 checksums #26748 (issue: #26746 )
edit
Core
Allow InputStreamStreamInput array size validation where applicable #26692
Refactor bootstrap check results and error messages #26637
Add BootstrapContext to expose settings and recovered state to bootstrap checks #26628
Unit testable index creation task on MetaDataCreateIndexService #25961
Discovery
Allow plugins to validate cluster-state on join #26595
Mapping
More efficient encoding of range fields. #26470 (issue: #26443 )
Plugin Repository HDFS
Add permission checks before reading from HDFS stream #26716 (issue: #26714 )
Recovery
Introduce a History UUID as a requirement for ops based recovery #26577 (issue: #10708 )
Scripting
ScriptService: Replace max compilation per minute setting with max compilation rate #26399
Search
Add soft limit on allowed number of script fields in request #26598 (issue: #26390 )
Add a soft limit for the number of requested doc-value fields #26574 (issue: #26390 )
Sequence IDs
edit
Aggregations
Do not delegate a null scorer to LeafBucketCollectors #26747 (issue: #26611 )
Core
Fix cache compute if absent for expired entries #26516
Dates
Highlighting
Fix percolator highlight sub fetch phase to not highlight query twice #26622
Inner Hits
Do not allow inner hits that fetch _source and have a non nested object field as parent #25749 (issue: #25315 )
Internal
IndexShard.routingEntry should only be updated once all internal state is ready #26776
Catch exceptions and inform handler in RemoteClusterConnection#collectNodes #26725 (issue: #26700 )
Internal: Add versionless alias for rest client codebase in policy files #26521
Java API
BulkProcessor flush runnable preserves the thread context from creation time #26718 (issue: #26596 )
Java High Level REST Client
Make RestHighLevelClient’s Request class public #26627 (issue: #26455 )
Forbid direct usage of ContentType.create() methods #26457 (issues: #22769 , #26438 )
Java REST Client
Better message text for ResponseException #26564
Mapping
Allow copying from a field to another field that belongs to the same nested object. #26774 (issue: #26763 )
Plugin Analysis Kuromoji
Plugin Discovery File
Fix discovery-file plugin to use custom config path #26662 (issue: #26660 )
Plugin Repository Azure
Azure snapshots can not be restored anymore #26778 (issues: #22858 , #26751 , #26777 )
Snapshot : azure module - accelerate the listing of files (used in delete snapshot) #25710 (issue: #25424 )
Plugin Repository HDFS
Add Log4j to SLF4J binding for repository-hdfs #26514 (issue: #26512 )
Query DSL
Fixed incomplete JSON body on count request making org.elasticsearch.rest.action.RestActions#parseTopLevelQueryBuilder go into endless loop #26680 (issue: #26083 )
Search
Fail query when a sort is provided in conjunction with rescorers #26510
Let search phases override max concurrent requests #26484 (issue: #26198 )
Similarities
Add boolean similarity to built in similarity types #26613
Upgrade API
Upgrade API: fix excessive logging and unnecessary template updates #26698 (issue: #26673 )
Core
Upgrade to Lucene 7.0.0 #26744
Upgrade to lucene-7.0.0-snapshot-d94a5f0. #26441
Logging