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Elasticsearch version 8.7.0edit

Also see Breaking changes in 8.7.

Known issuesedit

  • Shard rebalancing may temporarily unbalance cluster

    From 8.6.0 onwards the default shard rebalancing algorithm will compute the final desired balance and then make shard movements to reconcile the current state of the cluster with the desired state. However the order in which the shard movements take place may be skewed towards certain nodes, causing the cluster to become temporarily unbalanced while the reconciliation is ongoing. As always, once a node reaches a disk watermark it will not accept any additional shards, but this skew may result in nodes reaching their disk watermarks more often than expected in normal operation. Once the reconciliation process completes, the cluster will be balanced again.

    To avoid this problem, upgrade to 8.8.0 or later.

Breaking changesedit

Ingest Node
  • Making JsonProcessor stricter so that it does not silently drop data #93179 (issue: #92898)
Indices APIs
  • The Resolve index API implementation was adjusted to use the same index resolution mechanism as other similar APIs, adding support for the ignore_unavailable and allow_no_indices flags and the _all meta-index. If there are no matching indices then earlier versions of this API would return an empty result with the 200 OK HTTP response code, but from 8.7.0 onwards by default it returns an IndexNotFoundException with the 404 Not Found HTTP response code. To recover the old behaviour, add the query parameter ?ignore_unavailable=true (#92820).

Bug fixesedit

Aggregations
  • Don’t create a new DoubleHistogram instance for empty buckets #92547
  • Fix: do not allow map key types other than String #88686 (issue: #66057)
Allocation
  • Fallback to the actual shard size when forecast is not available #93461
  • Skip DiskThresholdMonitor when cluster state is not recovered #93699
  • Suppress response headers in AllocationActionMultiListener #93777 (issue: #93773)
Authentication
  • Correctly remove domain from realm when rewriting Authentication for compatibility with node versions that don’t support domains #93276
Authorization
  • Fix Security’s expression resolver to not remove unavailable but authorized names #92625
CCR
  • Deduplicate Heavy CCR Repository CS Requests #91398
CRUD
  • Avoid NPE in Stateless Get/mGet #94164
  • Do not refresh all indices in TransportBulkAction #93417
Cluster Coordination
  • Delay master task failure notifications until commit #92693 (issue: #92677)
Data streams
  • Allow different filters per DataStream in a DataStreamAlias #92692 (issue: #92050)
Geo
  • Build index qualified name in cross cluster vector tile search #94574 (issue: #94557)
  • Check GeohexGrid bounds on geopoint using spherical coordinates #92460
  • Fix bug when clipping Geometry collections in vector tiles #93562
Health
  • Take into account max_headroom in disk watermark calculations #93157 (issue: #93155)
ILM+SLM
  • Allow ILM step transition to the phase terminal step #91754
  • Avoiding BulkProcessor deadlock in ILMHistoryStore #91238 (issues: #68468, #50440)
  • Fixed changing only the forceMerge flag in SearchableSnapshotAction wouldn’t update the policy #93847
  • Preventing ILM and SLM runtime state from being stored in a snapshot #92252
Infra/CLI
  • Restore printing bootstrap checks as errors #93178 (issue: #93074)
Infra/Core
  • Add jdk.internal.reflect permission to es codebase #92387 (issue: #92356)
  • Add checks for exception loops through suppressed exceptions only #93944 (issue: #93943)
  • Ensure one-shot wrappers release their delegates #92928
  • Fix InputStream#readAllBytes on InputStreamIndexInput #92680
  • Fix indices resolver for datemath with colon #92973
  • Make FilterStreamInput less trappy #92422
Infra/Plugins
  • Ensure ordering of plugin initialization #93882 (issue: #93851)
  • Fix unclosed directory stream in ClassReaders #92890 (issue: #92866)
  • Update the version of asm used by plugin scanner #92784 (issue: #92782)
Infra/REST API
  • [Rest Api Compatibility] Format response media type with parameters #92695
Infra/Scripting
  • Fix NPE when method was called on an array type #91713 (issue: #87562)
Infra/Settings
  • Fix parse failures for ILM operator settings #94477 (issue: #94465)
Ingest Node
  • Better names and types for ingest stats #93533 (issue: #80763)
  • Correctly handle an exception case for ingest failure #92455
  • Disable ingest-attachment logging #93878
  • Download the geoip databases only when needed #92335 (issue: #90673)
  • Forwarding simulate calls to ingest nodes #92171
  • Grok returns a list of matches for repeated pattern names #92092 #92586 (issue: #92092)
  • Handle a default/request pipeline and a final pipeline with minimal additional overhead #93329 (issues: #92843, #81244, #93118)
  • Ingest-attachment module tika dependency versions #93755
  • More accurate total ingest stats #91730 (issue: #91358)
  • Speed up ingest geoip processors #92372
  • Speed up ingest set and append processors #92395
Machine Learning
  • Allocate trained models if zone awareness attributes not set #94128 (issue: #94123)
  • Fix data counts race condition when starting a datafeed #93324 (issue: #93298)
  • Fix tokenization bug when handling normalization in BERT and MPNet #92329
  • Free resources correctly when model loading is cancelled #92204
  • Stop the frequent_items aggregation reporting a subset when a superset exists #92239
  • Use long inference timeout at ingest #93731
Mapping
  • Fix dynamic mapping detection for invalid dates #94115 (issue: #93888)
  • No length check for source-only keyword fields #93299 (issue: #9304)
Network
  • Delay Connection#onRemoved while pending #92546
  • Fix fransport handshake starting before tls handshake completes #90534 (issue: #77999)
  • Protect NodeConnectionsService from stale conns #92558 (issue: #92029)
Recovery
  • Disable recovery monitor before recovery start #93551 (issue: #93542)
  • Fix potential leak in RemoteRecoveryHandler #91802
  • Report recovered files as recovered from snapshot for fully mounted searchable snapshots #92976
Rollup
  • Downsampling unmapped text fields #94387 (issue: #94346)
  • Propagate timestamp format and convert nanoseconds to milliseconds #94141 (issue: #94085)
  • Stop processing TransportDownsampleAction on failure #94624
  • Support downsampling of histogram as labels #93445 (issue: #93263)
Search
  • Add null check for sort fields over collapse fields #94546 (issue: #94407)
  • Annotated highlighter does not match when search contains both annotation and annotated term #92920 (issue: #91944)
  • Clear field caps index responses on cancelled #93716 (issue: #93029)
  • Do not include frozen indices in PIT by default #94377
  • Fix NPE thrown by prefix query in strange scenarios #94369
  • Fix _id field fetch issue. #94528 (issue: #94515)
  • Fix metadata _size when it comes to stored fields extraction #94483 (issue: #94468)
  • Fix missing override for matches in ProfileWeight #92360
  • Nested path info shouldn’t be added during copy_to #93340 (issue: #93117)
  • Use all profiling events on startup #92087
  • Use keyword analyzer for untokenized fields in TermVectorsService #94518
  • [Profiling] Adjust handling of last data slice #94283
  • [Profiling] Ensure responses are only sent once #93692 (issue: #93691)
  • [Profiling] Handle response processing errors #93860
Snapshot/Restore
  • Fix unhandled exception when blobstore repository contains unexpected file #93914
  • Support for GCS proxies everywhere in the GCS API #92192 (issue: #91952)
Stats
  • Avoid capturing cluster state in TBbNA #92255
TSDB
  • Fix synthetic _source for sparse _doc_count field #91769 (issue: #91731)
Task Management
Transform
  • Integrate "sourceHasChanged" call into failure handling and retry logic #92762 (issue: #92133)
Vector Search
  • Fix maxScore calculation for kNN search #93875
  • Fix explain for kNN search matches #93876

Enhancementsedit

Aggregations
  • Optimize composite agg with leading global ordinal value source #92197
Allocation
  • Add forecasted_write_load and forecasted_shard_size_in_bytes to the endpoint #92303
  • Expose tier balancing stats via internal endpoint #92199
  • Introduce ShardRouting.Role #92668
  • Prevalidate node removal API (pt. 2) #91256 (issue: #87776)
  • Simulate moves using cluster_concurrent_rebalance=2 #93977
  • Unpromotables skip replication and peer recovery #93210
Authentication
  • Add new token_type setting to JWT realm #91536
  • JWT realm - Initial support for access tokens #91781
  • JWT realm - Simplify token principal calculation #92315
  • JWT realm - add support for required claims #92314
  • Support custom PBKDF2 password hashes #92871
Authorization
  • Allowed indices matcher supports nested limited roles #93306
  • Extra kibana_system privileges for Fleet transform upgrades #91499
  • Pre-authorize child search transport actions #91886
Cluster Coordination
  • Add links to troubleshooting docs #92755 (issue: #92741)
  • Improve node-{join,left} logging for troubleshooting #92742
  • Repeat cluster.initial_master_nodes log warning #92744
EQL
  • EQL Samples: add support for multiple samples per key #91783
Engine
  • Add commits listener for InternalEngine and CombinedDeletionPolicy #92017
  • Add primary term supplier to Engine.IndexCommitListener #92101
  • Adjust range of allowed percentages of deletes in an index #93188
  • Diff the list of filenames that are added by each new commit #92238
  • Set a fixed compound file threshold of 1GB #92659
Geo
  • Add methods to H3#hexRing to prevent allocating long arrays #92711
  • Add methods to prevent allocating long arrays during child navigation on H3 api #92099
  • Add new H3 api method #h3ToNoChildrenIntersecting #91673
  • In H3, compute destination point from distance and azimuth using planar 3d math" #93084
  • Protect H3 library against integer overflow #92829
  • Reduce number of object allocations in H3#h3ToGeoBoundary #91586
  • Speed H3 library by using FastMath implementation for trigonometric functions #91839
Health
Indices APIs
  • Add ignore_missing_component_templates config option #92436 (issue: #92426)
Infra/CLI
  • Scan stable plugins for named components upon install #92528
Infra/Core
  • Add log level for JVM logs #92382
  • Added new field rollout_duration_seconds to fleet-actions #92640
  • Bind the readiness service to the wildcard address #91329 (issue: #90997)
  • Provide locally mounted secure settings implementation #93392
Infra/Plugins
  • Check stable plugin version at install and load time #91780
  • Example stable plugins with settings #92334
  • Load stable plugins as synthetic modules #91869
  • Settings api for stable plugins #91467
Infra/Scripting
  • Script: Metadata validateMetadata optimization #93333
  • Short-circuit painless def equality #92102
  • Use primitive types rather than boxing/unboxing for iterating over primitive arrays from defs #92025
Ingest Node
  • Cache the creation of parsers within DateProcessor #92880
  • Make GeoIpProcessor backing database instance pluggable #93285
Machine Learning
  • Add identification of multimodal distribution to anomaly explanations #2440
  • Add the ability to include and exclude values in Frequent items #92414
  • Better error when aggregate_metric_double used in scrolling datafeeds #92232 (issue: #90592)
  • Implement extension pruning in frequent items to improve runtime #92322
  • Improve frequent_items performance using global ordinals #93304
  • Improve anomaly detection results indexing speed #92417
  • Improve frequent items runtime #93255
  • Increase the default timeout for the start trained model deployment API #92328
  • Option to delete user-added annotations for the reset/delete job APIs #91698 (issue: #74310)
  • Persist data counts and datafeed timing stats asynchronously #93000
  • Remove the PyTorch inference work queue as now handled in Elasticsearch #2456
  • Text Embedding search #93531
  • Upgrade PyTorch to version 1.13.1 #2430
Mapping
  • Switch to Lucene’s new IntField/LongField/FloatField/DoubleField #93165
Monitoring
  • Add kibana.stats.elasticsearch_client stats to the monitoring index templates. #91508
  • Add monitoring mappings for es ingest metricset #92950
Network
  • Deserialize responses on the handling thread-pool #91367
Performance
  • Add vector distance scoring to micro benchmarks #92340
Query Languages
  • Introduce parameterized rule and executor #92428
Recovery
  • Make clean up files step configurable for peer-recovery of replicas #92490
Search
  • Access term dictionary more efficiently #92269
  • Add term query support to rank_features mapped field #93247
  • Add new query_vector_builder option to knn search clause #93331
  • Add profiling plugin #91640
  • Enable profiling plugin by default #92787
  • Get stackframes and executables more concurrently #93559
  • Improve the false positive rate of the bloom filter by setting 7 hash functions #93283
  • Increase the number of threads of GET threadpool #92309
  • Instrument Weight#count in ProfileWeight #85656 (issue: #85203)
  • Reduce memory usage of match all bitset #92777
  • Runtime fields to optionally ignore script errors #92380
  • Speed up retrieval of data for flamegraphs #93448
  • Support retrieving inlined stack frames #92863
  • [Profiling] Reduce GC pressure #93590
Security
  • Configurable retention period for invalidated or expired API keys #92219
  • Record timestamp on API key invalidation #91873
Snapshot/Restore
  • Make RecoveryPlannerService optional #92489
TSDB
  • Enable bloom filter for _id field in tsdb indices #92115
  • Improve downsampling performance by removing map lookups #92494 (issue: #90226)
  • Minor TSDB parsing speedup #92276
  • Skip duplicate checks on segments that don’t contain the document’s timestamp #92456
  • Support fields in synthetic source in last cases #91595
Task Management
  • TransportGetTaskAction: Wait for the task asynchronously #93375
  • TransportListTaskAction: wait for tasks to finish asynchronously #90977 (issue: #89564)
Transform
  • Add from parameter to Transform Start API #91116 (issue: #88646)
  • Support "offset" parameter in DateHistogramGroupSource #93203
  • Trigger state persistence based on time #93221
Vector Search
  • Allow null to be provided for dense_vector field values #93388
  • Allow more than one KNN search clause #92118 (issue: #91187)
Watcher
  • Add ability for Watcher’s webhook actions to send additional header #93426

New featuresedit

Distributed
  • Secure settings that can fall back to yml in Stateless #91925
Geo
Health
  • The Health API is now generally available #92879
  • [HealthAPI] Add size parameter that controls the number of affected resources returned #92399 (issue: #91930)
  • [HealthAPI] Add support for the FEATURE_STATE affected resource #92296 (issue: #91353)
Infra/Plugins
  • [Fleet] Add files and files data index templates and ILM policies #91413
Ingest Node
  • Redact Ingest Processor #92951
Machine Learning
  • Make frequent_item_sets aggregation GA #93421
  • Make native inference generally available #92213
TSDB
  • Add a TSDB rate aggregation #90447
  • Downsampling GA #92913
  • Release time_series and rate (on counter fields) aggegations as tech preview #93546
  • Time series (TSDS) GA #91519
Transform

Upgradesedit

Infra/Core
  • Align all usages of Jackson to be 2.14.2 #93438
Ingest Node
  • Upgrading tika to 2.6.0 #92104
Network
  • Upgrade to Netty 4.1.85 #91846
  • Upgrade to Netty 4.1.86 #92587
Query Languages
  • Upgrade antlr to 4.11.1 for ql, eql and sql #93238
Search
  • Upgrade to Lucene 9.5.0 #93385
  • Upgrade to lucene-9.5.0-snapshot-d19c3e2e0ed #92957
Snapshot/Restore
  • Align all usages of protobuf to be 3.21.9 #92123
  • Bump reactor netty version #92457
  • Consolidate google-oauth-client to latest version #91722
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