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« Release notes Appendix A: Dependencies and versions »
Elastic Docs ›Elasticsearch Guide [master] ›Release notes

Elasticsearch version 9.0.0

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Elasticsearch version 9.0.0

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Coming in 9.0.0.

Also see Breaking changes in 9.0.

Breaking changes

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Allocation
  • Increase minimum threshold in shard balancer #115831
  • Remove cluster.routing.allocation.disk.watermark.enable_for_single_data_node setting #114207
  • Remove cluster state from /_cluster/reroute response #114231 (issue: #88978)
Analysis
  • Snowball stemmers have been upgraded #114146
  • The german2 stemmer is now an alias for the german snowball stemmer #113614
  • The persian analyzer has stemmer by default #113482 (issue: #113050)
  • The Korean dictionary for Nori has been updated #114124
Cluster Coordination
  • Remove unsupported legacy value for discovery.type #112903
Highlighting
  • Remove support for deprecated force_source highlighting parameter #116943
Indices APIs
  • Apply more strict parsing of actions in bulk API #115923
  • Remove deprecated local attribute from alias APIs #115393
Infra/REST API
  • Output a consistent format when generating error json #90529 (issue: #89387)
Ingest Node
  • Remove ecs option on user_agent processor #116077
  • Remove ignored fallback option on GeoIP processor #116112
Mapping
  • Remove support for type, fields, copy_to and boost in metadata field definition #116944
Search
  • Remove legacy params from range query #116970
Snapshot/Restore
  • Remove deprecated xpack.searchable.snapshot.allocate_on_rolling_restart setting #114202

Bug fixes

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Aggregations
  • Handle with illegalArgumentExceptions negative values in HDR percentile aggregations #116174 (issue: #115777)
Analysis
  • Adjust analyze limit exception to be a bad_request #116325
CCS
  • Fix long metric deserialize & add - auto-resize needs to be set manually #117105 (issue: #116914)
CRUD
  • Preserve thread context when waiting for segment generation in RTG #114623
  • Standardize error code when bulk body is invalid #114869
Data streams
  • Add missing header in put_data_lifecycle rest-api-spec #116292
EQL
  • Don’t use a BytesStreamOutput to copy keys in BytesRefBlockHash #114819 (issue: #114599)
ES|QL
  • Added stricter range type checks and runtime warnings for ENRICH #115091 (issues: #107357, #116799)
  • Don’t return TEXT type for functions that take TEXT #114334 (issues: #111537, #114333)
  • ESQL: Fix sorts containing _source #116980 (issue: #116659)
  • ESQL: fix the column position in errors #117153
  • ES|QL: Fix stats by constant expression #114899
  • Fix NPE in EnrichLookupService on mixed clusters with <8.14 versions #116583 (issues: #116529, #116544)
  • Fix TDigestState.read CB leaks #114303 (issue: #114194)
  • Fixing remote ENRICH by pushing the Enrich inside FragmentExec #114665 (issue: #105095)
  • Use SearchStats instead of field.isAggregatable in data node planning #115744 (issue: #115737)
  • [ESQL] Fix Binary Comparisons on Date Nanos #116346
  • [ES|QL] To_DatePeriod and To_TimeDuration return better error messages on union_type fields #114934
Infra/CLI
Infra/Metrics
  • Make randomInstantBetween always return value in range [minInstant, maxInstant] #114177
Infra/REST API
  • Fixed a NullPointerException in _capabilities API when the path parameter is null. #113413 (issue: #113413)
Infra/Settings
  • Don’t allow secure settings in YML config (109115) #115779 (issue: #109115)
Ingest Node
  • Add warning headers for ingest pipelines containing special characters #114837 (issue: #104411)
  • Reducing error-level stack trace logging for normal events in GeoIpDownloader #114924
Logs
  • Always check if index mode is logsdb #116922
  • Prohibit changes to index mode, source, and sort settings during resize #115812
Machine Learning
Mapping
  • Change synthetic source logic for constant_keyword #117182 (issue: #117083)
  • Ignore conflicting fields during dynamic mapping update #114227 (issue: #114228)
Network
  • Use underlying ByteBuf refCount for ReleasableBytesReference #116211
Ranking
  • Propagating nested inner_hits to the parent compound retriever #116408 (issue: #116397)
Relevance
  • Fix handling of bulk requests with semantic text fields and delete ops #116942
Search
  • Catch and handle disconnect exceptions in search #115836
  • Fields caps does not honour ignore_unavailable #116021 (issue: #107767)
  • Fix handling of time exceeded exception in fetch phase #116676
  • Fix leak in DfsQueryPhase and introduce search disconnect stress test #116060 (issue: #115056)
  • Inconsistency in the _analyzer api when the index is not included #115930
  • Semantic text simple partial update #116478
  • Updated Date Range to Follow Documentation When Assuming Missing Values #112258 (issue: #111484)
  • Validate missing shards after the coordinator rewrite #116382
  • _validate does not honour ignore_unavailable #116656 (issue: #116594)
Snapshot/Restore
  • Retry throttled snapshot deletions #113237
Vector Search
  • Update Semantic Query To Handle Zero Size Responses #116277 (issue: #116083)
Watcher
  • Watch Next Run Interval Resets On Shard Move or Node Restart #115102 (issue: #111433)

Deprecations

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Ingest Node
  • Fix _type deprecation on simulate pipeline API #116259
Machine Learning
  • [Inference API] Deprecate elser service #113216
Mapping
  • Deprecate _source.mode in mappings #116689

Enhancements

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Allocation
  • Only publish desired balance gauges on master #115383
Authorization
  • Add a monitor_stats privilege and allow that privilege for remote cluster privileges #114964
  • [Security Solution] Add create_index to kibana_system role for index/DS .logs-endpoint.action.responses-* #115241
CRUD
  • Suppress merge-on-recovery for older indices #113462
Data streams
  • Adding a deprecation info API warning for data streams with old indices #116447
  • Apm-data: disable date_detection for all apm data streams #116995
Distributed
  • Metrics for incremental bulk splits #116765
  • Use Azure blob batch API to delete blobs in batches #114566
ES|QL
  • Add ES|QL bit_length function #115792
  • ESQL: Honor skip_unavailable setting for nonmatching indices errors at planning time #116348 (issue: #114531)
  • ESQL: Remove parent from FieldAttribute #112881
  • ESQL: extract common filter from aggs #115678
  • ESQL: optimise aggregations filtered by false/null into evals #115858
  • ES|QL CCS uses skip_unavailable setting for handling disconnected remote clusters #115266 (issue: #114531)
  • ES|QL: add metrics for functions #114620
  • Esql Enable Date Nanos (tech preview) #117080
  • Support partial sort fields in TopN pushdown #116043 (issue: #114515)
  • [ES|QL] Implicit casting string literal to intervals #115814 (issue: #115352)
Health
  • Increase replica_unassigned_buffer_time default from 3s to 5s #112834
Indices APIs
  • Ensure class resource stream is closed in ResourceUtils #116437
Inference
  • Add version prefix to Inference Service API path #117095
Infra/Circuit Breakers
  • Add link to Circuit Breaker "Data too large" exception message #113561
Infra/Core
  • Support for unsigned 64 bit numbers in Cpu stats #114681 (issue: #112274)
Infra/Metrics
  • Add ensureGreen test method for use with adminClient #113425
Infra/Scripting
  • Add a mustache.max_output_size_bytes setting to limit the length of results from mustache scripts #114002
Ingest Node
  • Add postal_code support to the City and Enterprise databases #114193
  • Add support for registered country fields for maxmind geoip databases #114521
  • Adding support for additional mapping to simulate ingest API #114742
  • Adding support for simulate ingest mapping adddition for indices with mappings that do not come from templates #115359
  • Support IPinfo database configurations #114548
  • Support more maxmind fields in the geoip processor #114268
Logs
  • Add logsdb telemetry #115994
  • Add num docs and size to logsdb telemetry #116128
  • Feature: re-structure document ID generation favoring _id inverted index compression #104683
Machine Learning
  • Add DeBERTa-V2/V3 tokenizer #111852
  • Add special case for elastic reranker in inference API #116962
  • Adding inference endpoint validation for AzureAiStudioService #113713
  • Adds support for input_type field to Vertex inference service #116431
  • Enable built-in Inference Endpoints and default for Semantic Text #116931
  • Increase default queue_capacity to 10_000 and decrease max queue_capacity to 100_000 #115041
  • Inference duration and error metrics #115876
  • Remove all mentions of eis and gateway and deprecate flags that do #116692
  • [Inference API] Add API to get configuration of inference services #114862
  • [Inference API] Improve chunked results error message #115807
Network
  • Allow http unsafe buffers by default #116115
Recovery
  • Attempt to clean up index before remote transfer #115142 (issue: #104473)
  • Trigger merges after recovery #113102
Reindex
  • Change Reindexing metrics unit from millis to seconds #115721
Relevance
  • Add query rules retriever #114855
  • Add tracking for query rule types #116357
Search
  • Add Search Phase APM metrics #113194
  • Add docvalue_fields Support for dense_vector Fields #114484 (issue: #108470)
  • Add initial support for semantic_text field type #113920
  • Adds access to flags no_sub_matches and no_overlapping_matches to hyphenation-decompounder-tokenfilter #115459 (issue: #97849)
  • Better sizing BytesRef for Strings in Queries #115655
  • Enable _tier based coordinator rewrites for all indices (not just mounted indices) #115797
  • Only aggregations require at least one shard request #115314
Security
  • Add refresh .security index call between security migrations #114879
Snapshot/Restore
  • Improve message about insecure S3 settings #116915
  • Retry S3BlobContainer#getRegister on all exceptions #114813
  • Split searchable snapshot into multiple repo operations #116918
  • Track shard snapshot progress during node shutdown #112567
Vector Search
  • Add support for bitwise inner-product in painless #116082

New features

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Data streams
  • Add default ILM policies and switch to ILM for apm-data plugin #115687
ES|QL
  • Add support for BYTE_LENGTH scalar function #116591
  • Esql/lookup join grammar #116515
  • Remove snapshot build restriction for match and qstr functions #114482
Search
  • ESQL - Add match operator (:) #116819

Upgrades

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Search
« Release notes Appendix A: Dependencies and versions »