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CHANGELOG-3.0.md

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CHANGELOG

All notable changes to this project are documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning. See the CONTRIBUTING guide for instructions on how to add changelog entries.

Unreleased 3.0

Added

  • Support for HTTP/2 (server-side) (#3847)
  • Allow mmap to use new JDK-19 preview APIs in Apache Lucene 9.4+ (#5151)
  • Add events correlation engine plugin (#6854)
  • Implement on behalf of token passing for extensions (#8679, #10664)
  • Provide service accounts tokens to extensions (#9618)
  • GHA to verify checklist items completion in PR descriptions (#10800)
  • Allow to pass the list settings through environment variables (like [], ["a", "b", "c"], ...) (#10625)
  • Views, simplify data access and manipulation by providing a virtual layer over one or more indices (#11957)

Dependencies

Changed

  • Migrate client transports to Apache HttpClient / Core 5.x (#4459)
  • Change http code on create index API with bad input raising NotXContentException from 500 to 400 (#4773)
  • Improve summary error message for invalid setting updates (#4792)
  • Return 409 Conflict HTTP status instead of 503 on failure to concurrently execute snapshots (#8986)
  • Add task completion count in search backpressure stats API (#10028)
  • Deprecate CamelCase PathHierarchy tokenizer name in favor to lowercase path_hierarchy (#10894)
  • Breaking change: Do not request "search_pipelines" metrics by default in NodesInfoRequest (#12497)

Deprecated

Removed

  • Remove deprecated code to add node name into log pattern of log4j property file (#4568)
  • Unused object and import within TransportClusterAllocationExplainAction (#4639)
  • Remove LegacyESVersion.V_7_0_* and V_7_1_* Constants (#2768)
  • Remove LegacyESVersion.V_7_2_ and V_7_3_ Constants (#4702)
  • Always auto release the flood stage block (#4703)
  • Remove LegacyESVersion.V_7_4_ and V_7_5_ Constants (#4704)
  • Remove Legacy Version support from Snapshot/Restore Service (#4728)
  • Remove deprecated serialization logic from pipeline aggs (#4847)
  • Remove unused private methods (#4926)
  • Remove LegacyESVersion.V_7_8_ and V_7_9_ Constants (#4855)
  • Remove LegacyESVersion.V_7_6_ and V_7_7_ Constants (#4837)
  • Remove LegacyESVersion.V_7_10_ Constants (#5018)
  • Remove Version.V_1_ Constants (#5021)
  • Remove custom Map, List and Set collection classes (#6871)

Fixed

  • Fix 'org.apache.hc.core5.http.ParseException: Invalid protocol version' under JDK 16+ (#4827)
  • Fix compression support for h2c protocol (#4944)
  • Don't over-allocate in HeapBufferedAsyncEntityConsumer in order to consume the response (#9993)

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