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Elasticsearch version 7.0.0-alpha1

The changes listed below have been released for the first time in Elasticsearch 7.0.0-alpha1.

Breaking changes

Aggregations

Remove support for deprecated params._agg/_aggs for scripted metric aggregations #32979 (issues: #29328, #31597)
Percentile/Ranks should return null instead of NaN when empty #30460 (issue: #29066)
Render sum as zero if count is zero for stats aggregation #27193 (issue: #26893)

Analysis

Remove delimited_payload_filter #27705 (issues: #26625, #27704)
Limit the number of tokens produced by _analyze #27529 (issue: #27038)
Add limits for ngram and shingle settings #27211 (issue: #25887)

Audit

Logfile auditing settings remove after deprecation #35205

Authentication

Security: remove wrapping in put user response #33512 (issue: #32332)

Authorization

Remove aliases resolution limitations when security is enabled #31952 (issue: #31516)

CRUD

Version conflict exception message enhancement #29432 (issue: #21278)
Using ObjectParser in UpdateRequest #29293 (issue: #28740)

Distributed

Remove undocumented action.master.force_local setting #29351
Remove tribe node support #28443
Forbid negative values for index.unassigned.node_left.delayed_timeout #26828

Features/Indices APIs

Indices Exists API should return 404 for empty wildcards #34499
Default to one shard #30539
Limit the number of nested documents #27405 (issue: #26962)

Features/Ingest

INGEST: Add Configuration Except. Data to Metdata #32322 (issue: #27728)

Features/Stats

Remove the suggest metric from stats APIs #29635 (issue: #29589)
Align cat thread pool info to thread pool config #29195 (issue: #29123)
Align thread pool info to thread pool configuration #29123 (issue: #29113)

Geo

Use geohash cell instead of just a corner in geo_bounding_box #30698 (issue: #25154)

Infra/Circuit Breakers

Introduce durability of circuit breaking exception #34460 (issue: #31986)
Circuit-break based on real memory usage #31767

Infra/Core

Core: Default node.name to the hostname #33677
Remove bulk fallback for write thread pool #29609
CCS: Drop http address from remote cluster info #29568 (issue: #29207)
Remove the index thread pool #29556
Main response should not have status 503 when okay #29045 (issue: #8902)
Automatically prepare indices for splitting #27451
Don’t refresh on _flush _force_merge and _upgrade #27000 (issue: #26972)

Infra/Packaging

Packaging: Remove windows bin files from the tar distribution #30596

Infra/REST API

REST: Remove GET support for clear cache indices #29525
REST : Clear Indices Cache API remove deprecated url params #29068

Infra/Scripting

Remove support for deprecated StoredScript contexts #31394 (issues: #27612, #28939)
Scripting: Remove getDate methods from ScriptDocValues #30690
Handle missing and multiple values in script #29611 (issue: #29286)
Drop ScriptDocValues#date and ScriptDocValues#dates in 7.0.0 [ISSUE] #23008

Infra/Settings

Remove config prompting for secrets and text #27216

Mapping

Match phrase queries against non-indexed fields should throw an exception #31060
Remove legacy mapping code. #29224
Reject updates to the _default_ mapping. #29165 (issues: #15613, #28248)
Remove the update_all_types option. #28288
Remove the _default_ mapping. #28248
Reject the index_options parameter for numeric fields #26668 (issue: #21475)

Network

Network: Remove http.enabled setting #29601 (issue: #12792)
Remove HTTP max content length leniency #29337

Percolator

remove deprecated percolator map_unmapped_fields_as_string setting #28060

Ranking

Add minimal sanity checks to custom/scripted similarities. #33564 (issue: #33309)
Scroll queries asking for rescore are considered invalid #32918 (issue: #31775)

Search

Remove deprecated url parameters _source_include and _source_exclude #35097 (issues: #22792, #33475)
Disallow negative query boost #34486 (issue: #33309)
Forbid negative weight in Function Score Query #33390 (issue: #31927)
In the field capabilities API, remove support for providing fields in the request body. #30185
Remove deprecated options for query_string #29203 (issue: #25551)
Fix Laplace scorer to multiply by alpha (and not add) #27125
Remove _primary and _replica shard preferences #26791 (issue: #26335)
Limit the number of expanded fields it query_string and simple_query_string #26541 (issue: #25105)
Make purely negative queries return scores of 0. #26015 (issue: #23449)

Snapshot/Restore

Include size of snapshot in snapshot metadata #30890 (issue: #18543)
Remove azure deprecated settings #26099 (issue: #23405)

Store

drop elasticsearch-translog for 7.0 #33373 (issues: #31389, #32281)
completely drop index.shard.check_on_startup: fix for 7.0 #33194

Suggesters

Fix threshold frequency computation in Suggesters #34312 (issue: #34282)
Make Geo Context Mapping Parsing More Strict #32821 (issues: #32202, #32412)
Make Geo Context Parsing More Strict #32412 (issue: #32202)
Remove the ability to index or query context suggestions without context #31007 (issue: #30712)

Breaking Java changes

Aggregations

Change GeoHashGrid.Bucket#getKey() to return String #31748 (issue: #30320)

Analysis

Remove deprecated AnalysisPlugin#requriesAnalysisSettings method #32037 (issue: #32025)

Features/Java High Level REST Client

API: Drop deprecated methods from Retry #33925
REST hl client: cluster health to default to cluster level #31268 (issue: #29331)
REST high-level Client: remove deprecated API methods #31200 (issue: #31069)

Features/Java Low Level REST Client

LLREST: Drop deprecated methods #33223 (issues: #29623, #30315)

Geo

[Geo] Decouple geojson parse logic from ShapeBuilders #27212

Infra/Core

Core: Remove RequestBuilder from Action #30966

Infra/Transport API

Java api clean up: remove deprecated isShardsAcked #28311 (issues: #27784, #27819)

Deprecations

Analysis

Replace parameter unicodeSetFilter with unicode_set_filter #29215 (issue: #22823)
Replace delimited_payload_filter by delimited_payload #26625 (issue: #21978)

Features/Indices APIs

Default copy settings to true and deprecate on the REST layer #30598

Infra/Transport API

Deprecate the transport client in favour of the high-level REST client #27085

Mapping

Deprecate type exists requests. #34663

Search

Deprecate filtering on _type. #29468 (issue: #15613)

New features

Analysis

Relax TermVectors API to work with textual fields other than TextFieldType #31915 (issue: #31902)

CCR

Generalize search.remote settings to cluster.remote #33413

Distributed

log messages from allocation commands #25955 (issues: #22821, #25325)

Features/Ingest

Revert "Introduce a Hashing Processor (#31087)" #32178
Add ingest-attachment support for per document indexed_chars limit #28977 (issue: #28942)

Features/Java High Level REST Client

GraphClient for the high level REST client and associated tests #32366

Features/Monitoring

[Elasticsearch Monitoring] Collect only display_name (for now) #35265 (issue: #8445)

Infra/Core

Skip shard refreshes if shard is search idle #27500

Infra/Logging

Logging: Unify log rotation for index/search slow log #27298

Infra/Plugins

Reload secure settings for plugins #31383 (issue: #29135)

Infra/REST API

Add an include_type_name option. #29453 (issue: #15613)

Machine Learning

[ML] Filter undefined job groups from update job calendar actions #30757

Mapping

Add a feature_vector field. #31102 (issue: #27552)
Expose Lucene’s FeatureField. #30618

Ranking

Add ranking evaluation API #27478 (issue: #19195)

Recovery

Allow to trim all ops above a certain seq# with a term lower than X, … #31211 (issue: #10708)

SQL

SQL: Add basic support for ST_AsWKT geo function #34205
SQL: Add support for SYS GEOMETRY_COLUMNS #30496 (issue: #29872)

Search

Add “took” timing info to response for _msearch/template API #30961 (issue: #30957)
Expose the lucene Matches API to searches [ISSUE] #29631
Add allow_partial_search_results flag to search requests with default setting true #28440 (issue: #27435)
Enable adaptive replica selection by default #26522 (issue: #24915)

Suggesters

serialize suggestion responses as named writeables #30284 (issue: #26585)

Enhancements

Aggregations

Uses MergingDigest instead of AVLDigest in percentiles agg #28702 (issue: #19528)

Discovery-Plugins

Rename discovery.zen.minimum_master_nodes [ISSUE] #14058

Engine

Remove versionType from translog #31945
do retry if primary fails on AsyncAfterWriteAction #31857 (issues: #31716, #31755)
handle AsyncAfterWriteAction exception before listener is registered #31755 (issue: #31716)
Use IndexWriter#flushNextBuffer to free memory #27753
Remove pre 6.0.0 support from InternalEngine #27720

Features/Indices APIs

Add cluster-wide shard limit #32856 (issue: #20705)
Remove RestGetAllAliasesAction #31308 (issue: #31129)
Add rollover-creation-date setting to rolled over index #31144 (issue: #30887)
add is-write-index flag to aliases #30942
Make index and bulk APIs work without types. #29479

Features/Ingest

ingest: Add ignore_missing property to foreach filter (#22147) #31578 (issue: #22147)

Features/Java High Level REST Client

HLRC API for _termvectors #32610 (issue: #27205)

Features/Stats

Stats to record how often the ClusterState diff mechanism is used successfully #26973

Features/Watcher

Watcher: Validate email adresses when storing a watch #34042 (issue: #33980)

Infra/Circuit Breakers

Have circuit breaker succeed on unknown mem usage #33125 (issue: #31767)
Account for XContent overhead in in-flight breaker #31613
Script Stats: Add compilation limit counter to stats #26387

Infra/Core

Add RunOnce utility class that executes a Runnable exactly once #35484
Improved IndexNotFoundException’s default error message #34649 (issue: #34628)
Set a bounded default for http.max_warning_header_count [ISSUE] #33479

Infra/Packaging

Choose JVM options ergonomically #30684

Infra/REST API

Remove hand-coded XContent duplicate checks #34588 (issues: #22073, #22225, #22253)
Add the include_type_name option to the search and document APIs. #29506 (issue: #15613)
Validate op_type for _create #27483

Infra/Scripting

Tests: Add support for custom contexts to mock scripts #34100
Scripting: Reflect factory signatures in painless classloader #34088
Handle missing values in painless #32207 (issue: #29286)

Infra/Settings

Settings: Add keystore creation to add commands #26126

Infra/Transport API

Change BWC version for VerifyRepositoryResponse #30796 (issue: #30762)

Network

Add cors support to NioHttpServerTransport #30827 (issue: #28898)
Reintroduce mandatory http pipelining support #30820
Make http pipelining support mandatory #30695 (issues: #28898, #29500)
Add nio http server transport #29587 (issue: #28898)
Add class for serializing message to bytes #29384 (issue: #28898)
Selectors operate on channel contexts #28468 (issue: #27260)
Unify nio read / write channel contexts #28160 (issue: #27260)
Create nio-transport plugin for NioTransport #27949 (issue: #27260)
Add elasticsearch-nio jar for base nio classes #27801 (issue: #27802)

Ranking

Add k parameter to PrecisionAtK metric #27569

SQL

SQL: Introduce support for NULL values #34573 (issue: #32079)

Search

Make limit on number of expanded fields configurable #35284 (issues: #26541, #34778)
Search: Simply SingleFieldsVisitor #34052
Don’t count hits via the collector if the hit count can be computed from index stats. #33701
Limit the number of concurrent requests per node #31206 (issue: #31192)
Default max concurrent search req. numNodes * 5 #31171 (issues: #30783, #30994)
Change ScriptException status to 400 (bad request) #30861 (issue: #12315)
Change default value to true for transpositions parameter of fuzzy query #26901
Introducing "took" time (in ms) for _msearch #23767 (issue: #23131)

Snapshot/Restore

#31608 Add S3 Setting to Force Path Type Access #34721 (issue: #31608)

Store

add RemoveCorruptedShardDataCommand #32281 (issues: #31389, #32279)

ZenDiscovery

[Zen2] Introduce vote withdrawal #35446
Zen2: Add basic Zen1 transport-level BWC #35443
Zen2: Add diff-based publishing #35290
[Zen2] Introduce auto_shrink_voting_configuration setting #35217
Introduce transport API for cluster bootstrapping #34961
[Zen2] Reconfigure cluster as its membership changes #34592 (issue: #33924)
Zen2: Fail fast on disconnects #34503
[Zen2] Add storage-layer disruptions to CoordinatorTests #34347
[Zen2] Add low-level bootstrap implementation #34345
[Zen2] Gather votes from all nodes #34335
Zen2: Add Cluster State Applier #34257
[Zen2] Add safety phase to CoordinatorTests #34241
[Zen2] Integrate FollowerChecker with Coordinator #34075
Integrate LeaderChecker with Coordinator #34049
Zen2: Trigger join when active master detected #34008
Zen2: Update PeerFinder term on term bump #33992
[Zen2] Calculate optimal cluster configuration #33924
[Zen2] Introduce FollowersChecker #33917
Zen2: Integrate publication pipeline into Coordinator #33771
Zen2: Add DisruptableMockTransport #33713
[Zen2] Implement basic cluster formation #33668
[Zen2] Introduce LeaderChecker #33024
Zen2: Add leader-side join handling logic #33013
[Zen2] Add PeerFinder#onFoundPeersUpdated #32939
[Zen2] Introduce PreVoteCollector #32847
[Zen2] Introduce ElectionScheduler #32846
[Zen2] Introduce ElectionScheduler #32709
[Zen2] Add HandshakingTransportAddressConnector #32643 (issue: #32246)
[Zen2] Add UnicastConfiguredHostsResolver #32642 (issue: #32246)
Zen2: Cluster state publication pipeline #32584 (issue: #32006)
[Zen2] Introduce gossip-like discovery of master nodes #32246
Add core coordination algorithm for cluster state publishing #32171 (issue: #32006)
Add term and config to cluster state #32100 (issue: #32006)

Bug fixes

Aggregations

Fix InternalAutoDateHistogram reproducible failure #32723 (issue: #32215)

Analysis

Close #26771: beider_morse phonetic encoder failure when languageset unspecified #26848 (issue: #26771)

Authorization

Empty GetAliases authorization fix #34444 (issue: #31952)

Docs Infrastructure

Docs build fails due to missing nexus.png [ISSUE] #33101

Features/Indices APIs

Validate top-level keys for create index request (#23755) #23869 (issue: #23755)

Features/Ingest

INGEST: Fix Deprecation Warning in Script Proc. #32407

Features/Java High Level REST Client

HLRC: Drop extra level from user parser #34932

Features/Java Low Level REST Client

Remove I/O pool blocking sniffing call from onFailure callback, add some logic around host exclusion #27985 (issue: #27984)

Features/Watcher

Watcher: Ignore system locale/timezone in croneval CLI tool #33215

Geo

[build] Test GeoShapeQueryTests#testPointsOnly fails [ISSUE] #27454

Infra/Core

Ensure shard is refreshed once it’s inactive #27559 (issue: #27500)

Infra/Settings

Change format how settings represent lists / array #26723

Infra/Transport API

Remove version read/write logic in Verify Response #30879 (issue: #30807)
Enable muted Repository test #30875 (issue: #30807)
Bad regex in CORS settings should throw a nicer error #29108

License

Update versions for start_trial after backport #30218 (issue: #30135)

Mapping

Ensure that field aliases cannot be used in multi-fields. #32219

Network

Adjust SSLDriver behavior for JDK11 changes #32145 (issues: #32122, #32144)
Netty4SizeHeaderFrameDecoder error #31057
Fix memory leak in http pipelining #30815 (issue: #30801)
Fix issue with finishing handshake in ssl driver #30580

Search

Ensure realtime _get and _termvectors don’t run on the network thread #33814 (issue: #27500)
[bug] fuzziness custom auto #33462 (issue: #33454)
Fix inner hits retrieval when stored fields are disabled (none) #33018 (issue: #32941)
Set maxScore for empty TopDocs to Nan rather than 0 #32938
Handle leniency for cross_fields type in multi_match query #27045 (issue: #23210)
Raise IllegalArgumentException instead if query validation failed #26811 (issue: #26799)

Security

Handle 6.4.0+ BWC for Application Privileges #32929

ZenDiscovery

[Zen2] Remove duplicate discovered peers #35505

Upgrades

Geo

Upgrade JTS to 1.14.0 #29141 (issue: #29122)

Infra/Core

Upgrade to a Lucene 8 snapshot #33310 (issues: #32899, #33028, #33309)

Network

NETWORKING: Fix Netty Leaks by upgrading to 4.1.28 #32511 (issue: #32487)

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