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