Async write routing table flow

.ci/bwcVersions

@@ -30,4 +30,6 @@ BWC_VERSION:
   - "2.12.0"
   - "2.12.1"
   - "2.13.0"
+  - "2.13.1"
   - "2.14.0"
+  - "2.15.0"

.github/CODEOWNERS

@@ -11,7 +11,7 @@
 #   3. Use the command palette to run the CODEOWNERS: Show owners of current file command, which will display all code owners for the current file.
 
 # Default ownership for all repo files
-* @abbashus @adnapibar @anasalkouz @andrross @Bukhtawar @CEHENKLE @dblock @dbwiddis @dreamer-89 @gbbafna @kotwanikunal @mch2 @msfroh @nknize @owaiskazi19 @reta @Rishikesh1159 @ryanbogan @sachinpkale @saratvemulapalli @setiah @shwetathareja @sohami @tlfeng @VachaShah
+* @anasalkouz @andrross @Bukhtawar @CEHENKLE @dblock @dbwiddis @dreamer-89 @gbbafna @kotwanikunal @mch2 @msfroh @nknize @owaiskazi19 @reta @Rishikesh1159 @sachinpkale @saratvemulapalli @shwetathareja @sohami @tlfeng @VachaShah
 
 /modules/transport-netty4/ @peternied
 
@@ -24,4 +24,4 @@
 
 /.github/ @peternied
 
-/MAINTAINERS.md @abbashus @adnapibar @anasalkouz @andrross @Bukhtawar @CEHENKLE @dblock @dbwiddis @dreamer-89 @gbbafna @kotwanikunal @mch2 @msfroh @nknize @owaiskazi19 @peternied @reta @Rishikesh1159 @ryanbogan @sachinpkale @saratvemulapalli @setiah @shwetathareja @sohami @tlfeng @VachaShah
+/MAINTAINERS.md @anasalkouz @andrross @Bukhtawar @CEHENKLE @dblock @dbwiddis @dreamer-89 @gbbafna @kotwanikunal @mch2 @msfroh @nknize @owaiskazi19 @peternied @reta @Rishikesh1159 @sachinpkale @saratvemulapalli @shwetathareja @sohami @tlfeng @VachaShah

.github/pull_request_template.md

@@ -17,6 +17,7 @@ Resolves #[Issue number to be closed when this PR is merged]
   - [ ] All tests pass
 - [ ] New functionality has been documented.
   - [ ] New functionality has javadoc added
+- [ ] API changes companion pull request [created](https://github.com/opensearch-project/opensearch-api-specification/blob/main/DEVELOPER_GUIDE.md).
 - [ ] Failing checks are inspected and point to the corresponding known issue(s) (See: [Troubleshooting Failing Builds](../blob/main/CONTRIBUTING.md#troubleshooting-failing-builds))
 - [ ] Commits are signed per the DCO using --signoff
 - [ ] Commit changes are listed out in CHANGELOG.md file (See: [Changelog](../blob/main/CONTRIBUTING.md#changelog))

.github/workflows/assemble.yml

@@ -8,7 +8,7 @@ jobs:
     strategy:
       matrix:
         java: [ 11, 17, 21 ]
-        os: [ubuntu-latest, windows-latest, macos-latest]
+        os: [ubuntu-latest, windows-latest, macos-13]
     steps:
       - uses: actions/checkout@v4
       - name: Set up JDK ${{ matrix.java }}
@@ -18,10 +18,7 @@ jobs:
           distribution: temurin
       - name: Setup docker (missing on MacOS)
         if: runner.os == 'macos'
-        run: |
-          brew install docker
-          colima start
-          sudo ln -sf $HOME/.colima/default/docker.sock /var/run/docker.sock
+        uses: douglascamata/setup-docker-macos-action@main
       - name: Run Gradle (assemble)
         run: |
           ./gradlew assemble --parallel --no-build-cache -PDISABLE_BUILD_CACHE

.github/workflows/changelog_verifier.yml

@@ -1,7 +1,7 @@
 name: "Changelog Verifier"
 on:
   pull_request:
-    types: [opened, edited, review_requested, synchronize, reopened, ready_for_review, labeled, unlabeled]
+    types: [opened, synchronize, reopened, ready_for_review, labeled, unlabeled]
 
 jobs:
   # Enforces the update of a changelog file on every pull request
@@ -13,7 +13,32 @@ jobs:
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
           ref: ${{ github.event.pull_request.head.sha }}
-
       - uses: dangoslen/changelog-enforcer@v3
+        id: verify-changelog-3x
+        with:
+          skipLabels: "autocut, skip-changelog"
+          changeLogPath: 'CHANGELOG-3.0.md'
+        continue-on-error: true
+      - uses: dangoslen/changelog-enforcer@v3
+        id: verify-changelog
         with:
           skipLabels: "autocut, skip-changelog"
+          changeLogPath: 'CHANGELOG.md'
+        continue-on-error: true
+      - run: |
+          # The check was possibly skipped leading to success for both the jobs
+          if [[ ${{ steps.verify-changelog-3x.outcome }} == 'success' && ${{ steps.verify-changelog.outcome }} == 'success' ]]; then
+            exit 0
+          fi
+
+          if [[ ${{ steps.verify-changelog-3x.outcome }} == 'failure' && ${{ steps.verify-changelog.outcome }} == 'failure' ]]; then
+            echo "error: Please ensure a changelog entry exists in CHANGELOG.md or CHANGELOG-3.0.md"
+            exit 1
+          fi
+
+          # Concatenates the labels and checks if the string contains "backport"
+          has_backport_label=${{ contains(join(github.event.pull_request.labels.*.name, ', '), 'backport')}}
+          if [[ ${{ steps.verify-changelog.outcome }} == 'success' && $has_backport_label == false ]]; then
+            echo "error: Please make sure that the PR has a backport label associated with it when making an entry to the CHANGELOG.md file"
+            exit 1
+          fi

.github/workflows/detect-breaking-change.yml

@@ -1,6 +1,8 @@
 name: "Detect Breaking Changes"
 on:
-  pull_request
+  pull_request:
+    branches-ignore:
+      - main # This branch represents a to-be-released version of OpenSearch where breaking changes are allowed
 
 jobs:
   detect-breaking-change:

.github/workflows/links.yml

@@ -13,7 +13,7 @@ jobs:
       - uses: actions/checkout@v4
       - name: lychee Link Checker
         id: lychee
-        uses: lycheeverse/lychee-action@v1.9.3
+        uses: lycheeverse/lychee-action@v1.10.0
         with:
           args: --accept=200,403,429 --exclude-mail **/*.html **/*.md **/*.txt **/*.json --exclude-file .lychee.excludes
           fail: true

.github/workflows/precommit.yml

@@ -8,7 +8,7 @@ jobs:
     strategy:
       matrix:
         java: [ 11, 17, 21 ]
-        os: [ubuntu-latest, windows-latest, macos-latest]
+        os: [ubuntu-latest, windows-latest, macos-13]
     steps:
       - uses: actions/checkout@v4
       - name: Set up JDK ${{ matrix.java }}

.github/workflows/pull-request-checks.yml

@@ -18,6 +18,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: peternied/check-pull-request-description-checklist@v1.1
+        if: github.actor != 'dependabot[bot]'
         with:
           checklist-items: |
             New functionality includes testing.

.github/workflows/wrapper.yml

@@ -8,4 +8,4 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: gradle/wrapper-validation-action@v2
+      - uses: gradle/wrapper-validation-action@v3

CHANGELOG-3.0.md

@@ -0,0 +1,53 @@
+# CHANGELOG
+All notable changes to this project are documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/), and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html). See the [CONTRIBUTING guide](./CONTRIBUTING.md#Changelog) for instructions on how to add changelog entries.
+
+## [Unreleased 3.0]
+### Added
+- Support for HTTP/2 (server-side) ([#3847](https://github.com/opensearch-project/OpenSearch/pull/3847))
+- Allow mmap to use new JDK-19 preview APIs in Apache Lucene 9.4+ ([#5151](https://github.com/opensearch-project/OpenSearch/pull/5151))
+- Add events correlation engine plugin ([#6854](https://github.com/opensearch-project/OpenSearch/issues/6854))
+- Implement on behalf of token passing for extensions ([#8679](https://github.com/opensearch-project/OpenSearch/pull/8679), [#10664](https://github.com/opensearch-project/OpenSearch/pull/10664))
+- Provide service accounts tokens to extensions ([#9618](https://github.com/opensearch-project/OpenSearch/pull/9618))
+- GHA to verify checklist items completion in PR descriptions ([#10800](https://github.com/opensearch-project/OpenSearch/pull/10800))
+- Allow to pass the list settings through environment variables (like [], ["a", "b", "c"], ...) ([#10625](https://github.com/opensearch-project/OpenSearch/pull/10625))
+- Views, simplify data access and manipulation by providing a virtual layer over one or more indices ([#11957](https://github.com/opensearch-project/OpenSearch/pull/11957))
+
+### Dependencies
+
+### Changed
+- Migrate client transports to Apache HttpClient / Core 5.x ([#4459](https://github.com/opensearch-project/OpenSearch/pull/4459))
+- Change http code on create index API with bad input raising NotXContentException from 500 to 400 ([#4773](https://github.com/opensearch-project/OpenSearch/pull/4773))
+- Improve summary error message for invalid setting updates ([#4792](https://github.com/opensearch-project/OpenSearch/pull/4792))
+- Return 409 Conflict HTTP status instead of 503 on failure to concurrently execute snapshots ([#8986](https://github.com/opensearch-project/OpenSearch/pull/5855))
+- Add task completion count in search backpressure stats API ([#10028](https://github.com/opensearch-project/OpenSearch/pull/10028/))
+- Deprecate CamelCase `PathHierarchy` tokenizer name in favor to lowercase `path_hierarchy` ([#10894](https://github.com/opensearch-project/OpenSearch/pull/10894))
+- Breaking change: Do not request "search_pipelines" metrics by default in NodesInfoRequest ([#12497](https://github.com/opensearch-project/OpenSearch/pull/12497))
+
+### Deprecated
+
+### Removed
+- Remove deprecated code to add node name into log pattern of log4j property file ([#4568](https://github.com/opensearch-project/OpenSearch/pull/4568))
+- Unused object and import within TransportClusterAllocationExplainAction ([#4639](https://github.com/opensearch-project/OpenSearch/pull/4639))
+- Remove LegacyESVersion.V_7_0_* and V_7_1_* Constants ([#2768](https://https://github.com/opensearch-project/OpenSearch/pull/2768))
+- Remove LegacyESVersion.V_7_2_ and V_7_3_ Constants ([#4702](https://github.com/opensearch-project/OpenSearch/pull/4702))
+- Always auto release the flood stage block ([#4703](https://github.com/opensearch-project/OpenSearch/pull/4703))
+- Remove LegacyESVersion.V_7_4_ and V_7_5_ Constants ([#4704](https://github.com/opensearch-project/OpenSearch/pull/4704))
+- Remove Legacy Version support from Snapshot/Restore Service ([#4728](https://github.com/opensearch-project/OpenSearch/pull/4728))
+- Remove deprecated serialization logic from pipeline aggs ([#4847](https://github.com/opensearch-project/OpenSearch/pull/4847))
+- Remove unused private methods ([#4926](https://github.com/opensearch-project/OpenSearch/pull/4926))
+- Remove LegacyESVersion.V_7_8_ and V_7_9_ Constants ([#4855](https://github.com/opensearch-project/OpenSearch/pull/4855))
+- Remove LegacyESVersion.V_7_6_ and V_7_7_ Constants ([#4837](https://github.com/opensearch-project/OpenSearch/pull/4837))
+- Remove LegacyESVersion.V_7_10_ Constants ([#5018](https://github.com/opensearch-project/OpenSearch/pull/5018))
+- Remove Version.V_1_ Constants ([#5021](https://github.com/opensearch-project/OpenSearch/pull/5021))
+- Remove custom Map, List and Set collection classes ([#6871](https://github.com/opensearch-project/OpenSearch/pull/6871))
+
+### Fixed
+- Fix 'org.apache.hc.core5.http.ParseException: Invalid protocol version' under JDK 16+ ([#4827](https://github.com/opensearch-project/OpenSearch/pull/4827))
+- Fix compression support for h2c protocol ([#4944](https://github.com/opensearch-project/OpenSearch/pull/4944))
+- Don't over-allocate in HeapBufferedAsyncEntityConsumer in order to consume the response ([#9993](https://github.com/opensearch-project/OpenSearch/pull/9993))
+
+### Security
+
+[Unreleased 3.0]: https://github.com/opensearch-project/OpenSearch/compare/2.x...HEAD