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WARNING: Version 5.5 of Elasticsearch has passed its EOL date.

This documentation is no longer being maintained and may be removed. If you are running this version, we strongly advise you to upgrade. For the latest information, see the current release documentation.

« 5.5.1 Release Notes 5.4.3 Release Notes »
Elastic Docs ›Elasticsearch Reference [5.5] ›Release Notes

5.5.0 Release Notes

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5.5.0 Release Notes

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See Multi data path bug in Elasticsearch 5.3.0.

Also see Breaking changes in 5.5.

Breaking changes

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Plugins
  • Remove hidden file leniency from spawner #24079 (issue: #23980)
Settings

Breaking Java changes

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Aggregations
  • Remove the unused SignificantTerms.compareTerm() method #24714
  • Make SignificantTerms.Bucket an interface rather than an abstract class #24670 (issue: #24492)
  • Make Terms.Bucket an interface rather than an abstract class #24492
Plugin Delete By Query
  • Move DeleteByQuery and Reindex requests into core #24578

Deprecations

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Index APIs
  • Deprecated use of + in index expressions #24585 (issue: #24515)
Packaging
  • Add deprecation warnings for $ES_USER and $ES_GROUP #24190 (issue: #23989)
Plugin Repository S3
  • S3 Repository: Deprecate remaining repositories.s3.* settings #24144 (issue: #24143)
REST
  • Add deprecation logging for comma-separated feature parsing #25040 (issue: #24723)
Scripting
  • Scripting: Deprecate native scripts #24692 (issue: #19966)
  • Scripting: Deprecate index lookup #24691 (issue: #19359)
  • Deprecate Fine Grain Settings for Scripts #24573 (issue: #24532)
  • Scripting: Deprecate file script settings #24555 (issue: #21798)
  • Scripting: Deprecate file scripts #24552 (issue: #21798)
Settings
  • Settings: Update settings deprecation from yml to yaml #24663 (issue: #19391)
  • Deprecate settings in .yml and .json #24059 (issue: #19391)
Tribe Node

New features

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Mapping
  • Add new ip_range field type #24433
Plugin Analysis ICU
  • Add ICUCollationFieldMapper #24126

Enhancements

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Aggregations
  • Add superset size to Significant Term REST response #24865
  • Add document count to Matrix Stats aggregation response #24776
  • Share XContent rendering code in significant terms aggregations #24677
  • Add count to rest output of geo_centroid #24387 (issue: #24366)
  • Allow scripted metric agg to access _score #24295
Aliases
  • Handle multiple aliases in _cat/aliases api #23698 (issue: #23661)
Circuit Breakers
  • Closing a ReleasableBytesStreamOutput closes the underlying BigArray #23941
Cluster
  • Add a cluster block that allows to delete indices that are read-only #24678
  • Extract a common base class to allow services to listen to remote cluster config updates #24367
Core
Engine
  • Add refresh stats tracking for realtime get #25052 (issue: #24806)
  • Engine: store maxUnsafeAutoIdTimestamp in commit #24149
Exceptions
  • IllegalStateException: Only duplicated jar instead of classpath #24953
Index APIs
  • Open and close index to honour allow_no_indices option #24222 (issue: #24031)
Ingest
  • add exclude_keys option to KeyValueProcessor #24876 (issue: #23856)
Inner Hits
Internal
  • "shard started" should show index and shard ID #25157
  • Add the ability to set eager_global_ordinals in the new parent-join field #25019
  • Add assertions enabled helper #24834
  • Add cross cluster support to _field_caps #24463 (issue: #24334)
  • Log JVM arguments on startup #24451
  • Preserve cluster alias throughout search execution to lookup nodes by cluster and ID #24438
  • Move RemoteClusterService into TransportService #24424
  • Enum related performance additions. #24274 (issue: #24226)
Java API
  • Always Accumulate Transport Exceptions #25017 (issue: #23099)
Java High Level REST Client
Logging
  • Warn on not enough masters during election #20063 (issue: #8362)
Mapping
  • Do not index _type when there is at most one type. #24363
  • Only allow one type on 6.0 indices #24317 (issue: #15613)
  • token_count type : add an option to count tokens (fix #23227) #24175 (issue: #23227)
Network
Packaging
  • Set number of processes in systemd unit file #24970 (issue: #20874)
Plugin Lang Painless
  • Optimize instance creation in LambdaBootstrap #24618
  • Allow painless to load stored fields #24290
Plugin Repository GCS
  • GCS Repository: Add secure storage of credentials #24697
Plugins
  • Add purge option to remove plugin CLI #24981
  • Move ReindexAction class to core #24684 (issue: #24578)
  • Plugins: Add support for platform specific plugins #24265
REST
  • Make ObjectParser support string to boolean conversion #24668 (issue: #21802)
  • Allow passing single scrollID in clear scroll API body #24242 (issue: #24233)
Scripting
  • Add Ability to Specify No Types/Contexts Allowed For Scripts #24782
  • Add New Security Script Settings #24637 (issue: #24532)
Search
  • Eliminate array access in tight loops when profiling is enabled. #24959
  • Support Multiple Inner Hits on a Field Collapse Request #24517
  • Expand cross cluster search indices for search requests to the concrete index or to it’s aliases #24502
  • Remove leniency when merging fetched hits in a search response phase #24158
Search Templates
Settings
  • Emit settings deprecation logging at most once #25457
Snapshot/Restore
  • Improves snapshot logging and snapshot deletion error handling #25264
  • Enhances get snapshots API to allow retrieving repository index only #24477 (issue: #24288)
  • Ensure every repository has an incompatible-snapshots blob #24403 (issue: #22267)
  • Change snapshot status error to use generic SnapshotException #24355 (issue: #24225)
Stats
Suggesters
  • Provide informative error message in case of unknown suggestion context. #24241
  • Allow different data types for category in Context suggester #23491 (issue: #22358)
Upgrade API
  • Allow plugins to upgrade templates and index metadata on startup #24379

Bug fixes

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Aggregations
  • Terms aggregation should remap global ordinal buckets when a sub-aggregator is used to sort the terms #24941 (issue: #24788)
  • Correctly set doc_count when MovAvg "predicts" values on existing buckets #24892 (issue: #24327)
  • InternalPercentilesBucket should not rely on ordered percents array #24336 (issue: #24331)
  • Align behavior HDR percentiles iterator with percentile() method #24206
  • DateHistogram: Fix extended_bounds with offset #23789 (issue: #23776)
  • Fix ArrayIndexOutOfBoundsException when no ranges are specified in the query #23241 (issue: #22881)
Aliases
  • GET aliases should 404 if aliases are missing #25043 (issue: #24644)
Allocation
  • Discard stale node responses from async shard fetching #24434 (issue: #24007)
Analysis
  • PatternAnalyzer should lowercase wildcard queries when lowercase is true. #24967
Bulk
Cache
  • fix bug of weight computation #24856
Circuit Breakers
  • Checks the circuit breaker before allocating bytes for a new big array #25010 (issue: #24790)
Core
  • Fix cache expire after access #24546
  • Check for default.path.data included in path.data #24285 (issue: #24283)
Geo
  • Fix GeoPoint FieldStats ternary logic bug #25211 (issue: #24275)
  • Fix GeoDistance Ordinal for BWC #25033 (issue: #24816)
Highlighting
  • Higlighters: Fix MultiPhrasePrefixQuery rewriting #25103 (issue: #25088)
Index APIs
  • Rollover max docs should only count primaries #24977 (issue: #24217)
  • Fix legacy GeoPointField decoding in FieldStats #24534 (issue: #24275)
  • Validates updated settings on closed indices #24487 (issue: #23787)
  • Fixes restore of a shrunken index when initial recovery node is gone #24322 (issue: #24257)
Ingest
  • fix grok’s pattern parsing to validate pattern names in expression #25063 (issue: #22831)
  • Fix floating-point error when DateProcessor parses UNIX #24947
  • add option for _ingest.timestamp to use new ZonedDateTime (5.x backport) #24030 (issues: #23168, #23174)
Inner Hits
  • Fix Source filtering in new field collapsing feature #24068 (issue: #24063)
Internal
  • Fix race condition in RemoteClusterConnection node supplier #25432
  • Initialise empty lists in BaseTaskResponse constructor #25290
  • Extract a common base class for scroll executions #24979 (issue: #16555)
  • Ensure remote cluster is connected before fetching _field_caps #24845 (issue: #24763)
  • Obey lock order if working with store to get metadata snapshots #24787 (issue: #24481)
  • Remove _UNRELEASED from Version constants for released versions #24764
  • Fix _field_caps serialization in order to support cross cluster search #24722
  • Avoid race when shutting down controller processes #24579
  • Fix NPE if field caps request has a field that exists not in all indices #24504
More Like This
  • Pass over _routing value with more_like_this items to be retrieved #24679 (issue: #23699)
Nested Docs
  • In case of a single type the _id field should be added to the nested document instead of _uid field #25149
Network
  • Ensure pending transport handlers are invoked for all channel failures #25150
  • Notify onConnectionClosed rather than onNodeDisconnect to prune transport handlers #24639 (issues: #24557, #24575, #24632)
  • SniffNodesSampler should close connection after handling responses #24632 (issues: #22828, #24557, #24575)
Packaging
  • When stopping via systemd only kill the JVM, not its control group #25195
  • Handle parentheses in batch file path #24731 (issue: #24712)
Percolator
  • Fix range queries with date range based on current time in percolator queries. #24666 (issue: #23921)
  • For legacy indices rewrite percolator query upon percolation time #24617 (issue: #24485)
  • Fix memory leak when percolator uses bitset or field data cache #24115 (issue: #24108)
Plugin Lang Painless
  • painless: Fix method references to ctor with the new LambdaBootstrap and cleanup code #24406
  • Fix Painless Lambdas for Java 9 #24070 (issue: #23473)
Plugins
  • X-Pack plugin download fails on Windows desktop #24570
  • Fix plugin installation permissions #24527 (issue: #24480)
  • Fix delete of plugin directory on remove plugin #24266 (issue: #24252)
  • Use a marker file when removing a plugin #24252 (issue: #24231)
  • Remove hidden file leniency from plugin service #23982 (issue: #12465)
Query DSL
  • Thread falls into infinite loop when processing Indices query #24736 (issue: #24735)
REST
  • Fix handling of exceptions thrown on HEAD requests #25172 (issue: #21125)
  • Fixed NPEs caused by requests without content. #23497 (issue: #24701)
  • Fix get mappings HEAD requests #23192 (issue: #21125)
Recovery
  • Provide target allocation id as part of start recovery request #24333 (issue: #24167)
Reindex API
  • Reindex: don’t duplicate _source parameter #24629 (issue: #24628)
  • Add qa module that tests reindex-from-remote against pre-5.0 versions of Elasticsearch #24561 (issues: #23828, #24520)
Scroll
  • Fix single shard scroll within a cluster with nodes in version >= 5.3 and <= 5.3 #24512
Search
  • Adds check for negative search request size #25397 (issue: #22530)
  • Do not search locally if remote index pattern resolves to no indices #25436 (issue: #25426)
  • Make sure range queries are correctly profiled. #25108
  • Compute the took time of the query after the expand phase of field collapsing #24902 (issue: #24900)
  • Fix RangeFieldMapper rangeQuery to properly handle relations #24808 (issue: #24744)
  • Fix ExpandSearchPhase when response contains no hits #24688 (issue: #24672)
  • Include all aliases including non-filtering in _search_shards response #24489
  • Cross Cluster Search: propagate original indices per cluster #24328
Search Templates
  • No longer add illegal content type option to stored search templates #24251 (issue: #24227)
Settings
  • Keystore CLI should use the AddFileKeyStoreCommand for files #25298
  • Settings: Fix setting groups to include secure settings #25076 (issue: #25069)
  • Allow resetting settings that use an IP validator #24713 (issue: #24709)
  • Do not set path.data in environment if not set #24132 (issue: #24099)
Snapshot/Restore
  • Output all empty snapshot info fields if in verbose mode #25455 (issue: #24477)
  • Remove redundant and broken MD5 checksum from repository-s3 #25270 (issue: #25269)
  • Consolidates the logic for cleaning up snapshots on master election #24894 (issue: #24605)
  • Removes completed snapshot from cluster state on master change #24605 (issue: #24452)
  • Fix inefficient (worst case exponential) loading of snapshot repository #24510 (issue: #24509)
  • Fixes maintaining the shards a snapshot is waiting on #24289
Stats
  • _nodes/stats should not fail due to concurrent AlreadyClosedException #25016 (issue: #23099)
  • Avoid double decrement on current query counter #24922 (issues: #22996, #24872)
Suggesters
  • Fix context suggester to read values from keyword type field #24200 (issue: #24129)
Task Manager
  • Task Management: Make TaskInfo parsing forwards compatible #24073 (issue: #23250)

Regressions

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Highlighting
  • Fix Fast Vector Highlighter NPE on match phrase prefix #25116 (issue: #25088)

Upgrades

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Core
  • Upgrade to Lucene 6.5.1 #24399
Network
  • Upgrade to Netty 4.1.11.Final #24652
  • Upgrade Netty to 4.1.10.Final #24414
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