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+## Version 3.6.0 Release Notes
+
+Compatible with OpenSearch and OpenSearch Dashboards version 3.6.0
+
+### Features
+
+* Add bitmap64 query support ([#20606](https://github.com/opensearch-project/OpenSearch/pull/20606))
+* Add warmup phase for pull-based ingestion to prevent serving stale data before catching up with the streaming source ([#20526](https://github.com/opensearch-project/OpenSearch/pull/20526))
+* Implement field_mapping ingestion message mapper for pull-based ingestion ([#20729](https://github.com/opensearch-project/OpenSearch/pull/20729))
+* Remove experimental tag for pull-based ingestion, marking it as public API ([#20704](https://github.com/opensearch-project/OpenSearch/pull/20704))
+
+### Enhancements
+
+* Add index warmer support for replica shards using segment replication ([#20650](https://github.com/opensearch-project/OpenSearch/pull/20650))
+* Add indices to search request slow log for easier request identification ([#20588](https://github.com/opensearch-project/OpenSearch/pull/20588))
+* Add mapper_settings support and field_mapping mapper type for pull-based ingestion ([#20722](https://github.com/opensearch-project/OpenSearch/pull/20722))
+* Add new `Sensitive` setting property for tiering dynamic settings authorization ([#20901](https://github.com/opensearch-project/OpenSearch/pull/20901))
+* Add node-level JVM and CPU runtime metrics following OpenTelemetry semantic conventions ([#20844](https://github.com/opensearch-project/OpenSearch/pull/20844))
+* Add adaptive shard selection for bulk writes on append-only indices ([#20065](https://github.com/opensearch-project/OpenSearch/pull/20065))
+* Add support for expected remote cluster name validation in CCS sniff mode ([#20532](https://github.com/opensearch-project/OpenSearch/pull/20532))
+* Add Scroll API support for workload management rule-based autotagging ([#20151](https://github.com/opensearch-project/OpenSearch/pull/20151))
+* Add custom search settings support for workload management groups, starting with timeout ([#20536](https://github.com/opensearch-project/OpenSearch/pull/20536))
+* Expose wrapped scorer in `ProfileScorer` via `getWrappedScorer` method for plugin access ([#20549](https://github.com/opensearch-project/OpenSearch/pull/20549))
+* Fix `ProfileScorer.getChildren()` to expose wrapped scorer in the scorer tree hierarchy ([#20607](https://github.com/opensearch-project/OpenSearch/pull/20607))
+* Fallback to Netty HTTP client when AWS CRT client is unavailable on the target platform ([#20698](https://github.com/opensearch-project/OpenSearch/pull/20698))
+* Support Docker distribution builds for ppc64le, arm64, and s390x architectures ([#20678](https://github.com/opensearch-project/OpenSearch/pull/20678))
+* Add intra-segment concurrency support for single-value metric aggregations ([#20503](https://github.com/opensearch-project/OpenSearch/pull/20503))
+* Add `ref_path` support for package-based Hunspell dictionary loading ([#20840](https://github.com/opensearch-project/OpenSearch/pull/20840))
+* Add streaming request flag to `SearchRequestContext` for plugin consumption ([#20530](https://github.com/opensearch-project/OpenSearch/pull/20530))
+* Make telemetry `Tags` immutable with sorted parallel arrays and precomputed hash for improved performance ([#20788](https://github.com/opensearch-project/OpenSearch/pull/20788))
+* Add indexer interface to decouple `IndexShard` from underlying engine implementations ([#20675](https://github.com/opensearch-project/OpenSearch/pull/20675))
+* Prevent criteria field updates for context-aware indices to simplify version management ([#20250](https://github.com/opensearch-project/OpenSearch/pull/20250))
+
+### Bug Fixes
+
+* Add range validations in query builder and field mapper ([#20518](https://github.com/opensearch-project/OpenSearch/pull/20518))
+* Expose `STRICT_EXPAND_OPEN_HIDDEN_FORBID_CLOSED` index option via static method ([#20980](https://github.com/opensearch-project/OpenSearch/pull/20980))
+* Fix `opensearch.cgroups.hierarchy.override` causing `SecurityException` due to missing file permissions ([#20565](https://github.com/opensearch-project/OpenSearch/pull/20565))
+* Relax `updatedAt` validation for workload group creation to handle minor clock skew across nodes ([#20486](https://github.com/opensearch-project/OpenSearch/pull/20486))
+* Fix `copy_to` functionality for `geo_point` fields with object or array values ([#20542](https://github.com/opensearch-project/OpenSearch/pull/20542))
+* Fix `field_caps` returning empty results for `disable_objects` mappings and field name corruption ([#20814](https://github.com/opensearch-project/OpenSearch/pull/20814))
+* Fix `listBlobsByPrefixInSortedOrder` in `EncryptedBlobContainer` to respect limit and avoid loading all files into memory ([#20514](https://github.com/opensearch-project/OpenSearch/pull/20514))
+* Fix terms lookup subquery to use cluster `max_clause_count` setting instead of hardcoded fallback ([#20823](https://github.com/opensearch-project/OpenSearch/pull/20823))
+* Fix terms aggregation performance regression on high-cardinality fields by introducing a max cardinality setting ([#20623](https://github.com/opensearch-project/OpenSearch/pull/20623))
+* Fix index template pattern collision detection producing false positives for multi-wildcard patterns ([#20702](https://github.com/opensearch-project/OpenSearch/pull/20702))
+* Fix JSON escaping in task details log metadata ([#20802](https://github.com/opensearch-project/OpenSearch/pull/20802))
+* Fix SLF4J component error by updating to `log4j-slf4j2-impl` for SLF4J 2.x compatibility ([#20587](https://github.com/opensearch-project/OpenSearch/pull/20587))
+* Fix `array_index_out_of_bounds_exception` with wildcard fields and aggregations under concurrent access ([#20842](https://github.com/opensearch-project/OpenSearch/pull/20842))
+* Delegate `getMin`/`getMax` methods for `ExitableTerms` to avoid slow path in field sort ([#20775](https://github.com/opensearch-project/OpenSearch/pull/20775))
+* Fix `CriteriaBasedCodec` to work with delegate codec ([#20442](https://github.com/opensearch-project/OpenSearch/pull/20442))
+* Fix synonym_graph filter failure with word_delimiter_graph when using custom synonym analyzers ([#19248](https://github.com/opensearch-project/OpenSearch/pull/19248))
+* Improve exception messaging when encountering legacy Elasticsearch version IDs during upgrade ([#20512](https://github.com/opensearch-project/OpenSearch/pull/20512))
+* Fix segment replication infinite retry caused by stale metadata checkpoint ([#20551](https://github.com/opensearch-project/OpenSearch/pull/20551))
+* Show heap percent threshold instead of moving-average value in search cancellation messages ([#20779](https://github.com/opensearch-project/OpenSearch/pull/20779))
+* Defer stored field reader initialization in `SourceLookup` to avoid unnecessary `madvise` calls ([#20827](https://github.com/opensearch-project/OpenSearch/pull/20827))
+* Fix terms aggregation performance regression by leveraging segment-to-global ordinal mapping ([#20683](https://github.com/opensearch-project/OpenSearch/pull/20683))
+* Fix batched deletion of stale cluster metadata manifests in remote cluster state cleanup ([#20566](https://github.com/opensearch-project/OpenSearch/pull/20566))
+* Fix stale segments cleanup to also trigger based on map size threshold ([#20976](https://github.com/opensearch-project/OpenSearch/pull/20976))
+* Fix Windows service startup with OpenJDK by updating procrun to 1.5.1 ([#20615](https://github.com/opensearch-project/OpenSearch/pull/20615))
+* Move `Randomness` from server to `lib/common` to reduce FIPS demo installer size ([#20570](https://github.com/opensearch-project/OpenSearch/pull/20570))
+* Add `accessUnixDomainSocket` permission for transport-grpc on Windows ([#20649](https://github.com/opensearch-project/OpenSearch/pull/20649))
+* Harden HTTP/3 support detection by verifying Quic native library availability for the target platform ([#20680](https://github.com/opensearch-project/OpenSearch/pull/20680))
+* Use `OPENSEARCH_FIPS_MODE` environment variable to enable FIPS enforced mode instead of checking for bcFIPS jars ([#20625](https://github.com/opensearch-project/OpenSearch/pull/20625))
+* Update MMapDirectory to use `ReadAdviseByContext` rather than default read advise ([#21062](https://github.com/opensearch-project/OpenSearch/pull/21062))
+* Ensure transient `ThreadContext` headers with propagators survive context restore ([#20854](https://github.com/opensearch-project/OpenSearch/pull/20854))
+
+### Maintenance
+
+* Bump Apache Lucene from 10.3.2 to 10.4.0 ([#20735](https://github.com/opensearch-project/OpenSearch/pull/20735))
+* Bump OpenTelemetry to 1.60.1 and OpenTelemetry Semconv to 1.40.0 ([#20737](https://github.com/opensearch-project/OpenSearch/pull/20737), [#20797](https://github.com/opensearch-project/OpenSearch/pull/20797))
+* Bump Project Reactor to 3.8.4 and Reactor Netty to 1.3.4 ([#20589](https://github.com/opensearch-project/OpenSearch/pull/20589), [#20834](https://github.com/opensearch-project/OpenSearch/pull/20834))
+* Bump Netty to 4.2.12.Final ([#20586](https://github.com/opensearch-project/OpenSearch/pull/20586), [#20997](https://github.com/opensearch-project/OpenSearch/pull/20997), [#20998](https://github.com/opensearch-project/OpenSearch/pull/20998))
+* Update Jackson to 2.21.2 ([#20989](https://github.com/opensearch-project/OpenSearch/pull/20989))
+* Bump `ch.qos.logback:logback-classic` to 1.5.32 and `logback-core` to 1.5.27 ([#20525](https://github.com/opensearch-project/OpenSearch/pull/20525), [#20761](https://github.com/opensearch-project/OpenSearch/pull/20761))
+* Bump `com.nimbusds:nimbus-jose-jwt` from 10.7 to 10.8 ([#20715](https://github.com/opensearch-project/OpenSearch/pull/20715))
+* Bump `com.sun.xml.bind:jaxb-impl` from 4.0.6 to 4.0.7 ([#20886](https://github.com/opensearch-project/OpenSearch/pull/20886))
+* Bump `com.netflix.nebula.ospackage-base` from 12.2.0 to 12.3.0 ([#20799](https://github.com/opensearch-project/OpenSearch/pull/20799))
+* Bump `org.apache.commons:commons-text` from 1.14.0 to 1.15.0 ([#20576](https://github.com/opensearch-project/OpenSearch/pull/20576))
+* Bump `org.jline:jline` from 3.30.6 to 4.0.0 ([#20800](https://github.com/opensearch-project/OpenSearch/pull/20800))
+* Bump `org.jruby.jcodings:jcodings` from 1.0.63 to 1.0.64 ([#20713](https://github.com/opensearch-project/OpenSearch/pull/20713))
+* Bump `org.jruby.joni:joni` from 2.2.3 to 2.2.7 ([#20714](https://github.com/opensearch-project/OpenSearch/pull/20714), [#20759](https://github.com/opensearch-project/OpenSearch/pull/20759))
+* Bump `org.tukaani:xz` from 1.11 to 1.12 ([#20760](https://github.com/opensearch-project/OpenSearch/pull/20760))
+* Bump `shadow-gradle-plugin` from 8.3.9 to 9.3.1 ([#20569](https://github.com/opensearch-project/OpenSearch/pull/20569))
+* Bump `com.netflix.nebula:gradle-info-plugin` to 16.2.1 ([#20825](https://github.com/opensearch-project/OpenSearch/pull/20825))