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+## 2024-03-21 Version 2.13.0 Release Notes
+
+## [2.13.0]
+### Added
+- [Tiered caching] Introducing cache plugins and exposing Ehcache as one of the pluggable disk cache option ([#11874](https://github.com/opensearch-project/OpenSearch/pull/11874))
+- Add support for dependencies in plugin descriptor properties with semver range ([#11441](https://github.com/opensearch-project/OpenSearch/pull/11441))
+- Add community_id ingest processor ([#12121](https://github.com/opensearch-project/OpenSearch/pull/12121))
+- Introduce query level setting `index.query.max_nested_depth` limiting nested queries ([#3268](https://github.com/opensearch-project/OpenSearch/issues/3268)
+- Add toString methods to MultiSearchRequest, MultiGetRequest and CreateIndexRequest ([#12163](https://github.com/opensearch-project/OpenSearch/pull/12163))
+- Fix error in RemoteSegmentStoreDirectory when debug logging is enabled ([#12328](https://github.com/opensearch-project/OpenSearch/pull/12328))
+- Support for returning scores in matched queries ([#11626](https://github.com/opensearch-project/OpenSearch/pull/11626))
+- Add shard id property to SearchLookup for use in field types provided by plugins ([#1063](https://github.com/opensearch-project/OpenSearch/pull/1063))
+- [Tiered caching] Make IndicesRequestCache implementation configurable [EXPERIMENTAL] ([#12533](https://github.com/opensearch-project/OpenSearch/pull/12533))
+- Force merge API supports performing on primary shards only ([#11269](https://github.com/opensearch-project/OpenSearch/pull/11269))
+- Add kuromoji_completion analyzer and filter ([#4835](https://github.com/opensearch-project/OpenSearch/issues/4835))
+- [Admission Control] Integrate IO Usage Tracker to the Resource Usage Collector Service and Emit IO Usage Stats ([#11880](https://github.com/opensearch-project/OpenSearch/pull/11880))
+- The org.opensearch.bootstrap.Security should support codebase for JAR files with classifiers ([#12586](https://github.com/opensearch-project/OpenSearch/issues/12586))
+- Remote reindex: Add support for configurable retry mechanism ([#12561](https://github.com/opensearch-project/OpenSearch/pull/12561))
+- Tracing for deep search path ([#12103](https://github.com/opensearch-project/OpenSearch/pull/12103))
+- [Metrics Framework] Adds support for asynchronous gauge metric type. ([#12642](https://github.com/opensearch-project/OpenSearch/issues/12642))
+- [Tiered caching] Add Stale keys Management and CacheCleaner to IndicesRequestCache ([#12625](https://github.com/opensearch-project/OpenSearch/pull/12625))
+- Make search query counters dynamic to support all query types ([#12601](https://github.com/opensearch-project/OpenSearch/pull/12601))
+- [Tiered caching] Add policies controlling which values can enter pluggable caches [EXPERIMENTAL] ([#12542](https://github.com/opensearch-project/OpenSearch/pull/12542))
+- [Tiered caching] Add serializer integration to allow ehcache disk cache to use non-primitive values ([#12709](https://github.com/opensearch-project/OpenSearch/pull/12709))
+- [Admission Control] Integrated IO Based AdmissionController to AdmissionControl Framework ([#12583](https://github.com/opensearch-project/OpenSearch/pull/12583))
+- Add Remote Store Migration Experimental flag and allow mixed mode clusters under same ([#11986](https://github.com/opensearch-project/OpenSearch/pull/11986))
+- Built-in secure transports support ([#12435](https://github.com/opensearch-project/OpenSearch/pull/12435))
+- Lightweight Transport action to verify local term before fetching cluster-state from remote ([#12252](https://github.com/opensearch-project/OpenSearch/pull/12252/))
+
+### Dependencies
+- Bump `com.squareup.okio:okio` from 3.7.0 to 3.8.0 ([#12290](https://github.com/opensearch-project/OpenSearch/pull/12290))
+- Bump `org.bouncycastle:bcprov-jdk15to18` to `org.bouncycastle:bcprov-jdk18on` version 1.77 ([#12326](https://github.com/opensearch-project/OpenSearch/pull/12326))
+- Bump `org.bouncycastle:bcmail-jdk15to18` to `org.bouncycastle:bcmail-jdk18on` version 1.77 ([#12326](https://github.com/opensearch-project/OpenSearch/pull/12326))
+- Bump `org.bouncycastle:bcpkix-jdk15to18` to `org.bouncycastle:bcpkix-jdk18on` version 1.77 ([#12326](https://github.com/opensearch-project/OpenSearch/pull/12326))
+- Bump `gradle/wrapper-validation-action` from 1 to 2 ([#12367](https://github.com/opensearch-project/OpenSearch/pull/12367))
+- Bump `netty` from 4.1.106.Final to 4.1.107.Final ([#12372](https://github.com/opensearch-project/OpenSearch/pull/12372))
+- Bump `opentelemetry` from 1.34.1 to 1.36.0 ([#12388](https://github.com/opensearch-project/OpenSearch/pull/12388), [#12618](https://github.com/opensearch-project/OpenSearch/pull/12618))
+- Bump Apache Lucene from 9.9.2 to 9.10.0 ([#12392](https://github.com/opensearch-project/OpenSearch/pull/12392))
+- Bump `org.apache.logging.log4j:log4j-core` from 2.22.1 to 2.23.1 ([#12464](https://github.com/opensearch-project/OpenSearch/pull/12464), [#12587](https://github.com/opensearch-project/OpenSearch/pull/12587))
+- Bump `antlr4` from 4.11.1 to 4.13.1 ([#12445](https://github.com/opensearch-project/OpenSearch/pull/12445))
+- Bump `com.netflix.nebula.ospackage-base` from 11.8.0 to 11.8.1 ([#12461](https://github.com/opensearch-project/OpenSearch/pull/12461))
+- Bump `peter-evans/create-or-update-comment` from 3 to 4 ([#12462](https://github.com/opensearch-project/OpenSearch/pull/12462))
+- Bump `lycheeverse/lychee-action` from 1.9.1 to 1.9.3 ([#12521](https://github.com/opensearch-project/OpenSearch/pull/12521))
+- Bump `com.azure:azure-core` from 1.39.0 to 1.47.0 ([#12520](https://github.com/opensearch-project/OpenSearch/pull/12520))
+- Bump `ch.qos.logback:logback-core` from 1.2.13 to 1.5.3 ([#12519](https://github.com/opensearch-project/OpenSearch/pull/12519))
+- Bump `codecov/codecov-action` from 3 to 4 ([#12585](https://github.com/opensearch-project/OpenSearch/pull/12585))
+- Bump `org.apache.zookeeper:zookeeper` from 3.9.1 to 3.9.2 ([#12580](https://github.com/opensearch-project/OpenSearch/pull/12580))
+- Bump `org.codehaus.woodstox:stax2-api` from 4.2.1 to 4.2.2 ([#12579](https://github.com/opensearch-project/OpenSearch/pull/12579))
+- Bump Jackson version from 2.16.1 to 2.17.0 ([#12611](https://github.com/opensearch-project/OpenSearch/pull/12611), [#12662](https://github.com/opensearch-project/OpenSearch/pull/12662))
+- Bump `reactor-netty` from 1.1.15 to 1.1.17 ([#12633](https://github.com/opensearch-project/OpenSearch/pull/12633))
+- Bump `reactor` from 3.5.14 to 3.5.15 ([#12633](https://github.com/opensearch-project/OpenSearch/pull/12633))
+- Bump `aws-sdk-java` from 2.20.55 to 2.20.86 ([#12251](https://github.com/opensearch-project/OpenSearch/pull/12251))
+
+### Changed
+- Allow composite aggregation to run under a parent filter aggregation ([#11499](https://github.com/opensearch-project/OpenSearch/pull/11499))
+- Quickly compute terms aggregations when the top-level query is functionally match-all for a segment ([#11643](https://github.com/opensearch-project/OpenSearch/pull/11643))
+- Mark fuzzy filter GA and remove experimental setting ([12631](https://github.com/opensearch-project/OpenSearch/pull/12631))
+- Keep the election scheduler open until cluster state has been applied ([#11699](https://github.com/opensearch-project/OpenSearch/pull/11699))
+
+### Fixed
+- [Revert] [Bug] Check phase name before SearchRequestOperationsListener onPhaseStart ([#12035](https://github.com/opensearch-project/OpenSearch/pull/12035))
+- Add support of special WrappingSearchAsyncActionPhase so the onPhaseStart() will always be followed by onPhaseEnd() within AbstractSearchAsyncAction ([#12293](https://github.com/opensearch-project/OpenSearch/pull/12293))
+- Add a system property to configure YamlParser codepoint limits ([#12298](https://github.com/opensearch-project/OpenSearch/pull/12298))
+- Prevent read beyond slice boundary in ByteArrayIndexInput ([#10481](https://github.com/opensearch-project/OpenSearch/issues/10481))
+- Fix the "highlight.max_analyzer_offset" request parameter with "plain" highlighter ([#10919](https://github.com/opensearch-project/OpenSearch/pull/10919))
+- Prevent unnecessary fetch sub phase processor initialization during fetch phase execution ([#12503](https://github.com/opensearch-project/OpenSearch/pull/12503))
+- Fix `terms` query on `float` field when `doc_values` are turned off by reverting back to `FloatPoint` from `FloatField` ([#12499](https://github.com/opensearch-project/OpenSearch/pull/12499))
+- Fix get task API does not refresh resource stats ([#11531](https://github.com/opensearch-project/OpenSearch/pull/11531))
+- Fix for deserilization bug in weighted round-robin metadata ([#11679](https://github.com/opensearch-project/OpenSearch/pull/11679))
+- onShardResult and onShardFailure are executed on one shard causes opensearch jvm crashed ([#12158](https://github.com/opensearch-project/OpenSearch/pull/12158))
+- Avoid overflow when sorting missing last on `epoch_millis` datetime field ([#12676](https://github.com/opensearch-project/OpenSearch/pull/12676))