diff --git a/.github/workflows/release-drafter.yml b/.github/workflows/release-drafter.yml
index 03cccbf28..87503acb6 100644
--- a/.github/workflows/release-drafter.yml
+++ b/.github/workflows/release-drafter.yml
@@ -10,7 +10,19 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
+      - id: get_data
+        run: |
+          echo "approvers=$(cat .github/CODEOWNERS | grep @ | tr -d '* ' | sed 's/@/,/g' | sed 's/,//1')" >> $GITHUB_OUTPUT
+          echo "version=$(cat package.json | jq .version | tr -d "\"")" >> $GITHUB_OUTPUT
+      - uses: trstringer/manual-approval@v1
+        with:
+          secret: ${{ github.TOKEN }}
+          approvers: ${{ steps.get_data.outputs.approvers }}
+          minimum-approvals: 2
+          issue-title: 'Release opensearch-js : ${{ steps.get_data.outputs.version }}'
+          issue-body: "Please approve or deny the release of opensearch-js. **VERSION**: ${{ steps.get_data.outputs.version }} **TAG**: ${{ github.ref_name }}  **COMMIT**: ${{ github.sha }}"
+          exclude-workflow-initiator-as-approver: true
       - name: Release
         uses: softprops/action-gh-release@v1
         with:
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7eec6c613..d6296760d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -77,6 +77,8 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 - Remove guidance on using npm and switch completely to yarn in developer_guide ([#439](https://github.com/opensearch-project/opensearch-js/issues/435))
 - Change coverage, compatability, integration, integration with unreleased Open Search, node ci, bundler tests not to run on documentation change ([441](https://github.com/opensearch-project/opensearch-js/pull/441))
 - Change the Windows yarn installation troubleshoot steps ([455](https://github.com/opensearch-project/opensearch-js/issues/455))
+- Make `callback` arg in `BaseConnectionPool`, `CloudConnectionPool` and `ConnectionPool` optional ([#451](https://github.com/opensearch-project/opensearch-js/pull/451))
+
 ### Deprecated
 
 - Remove deprecation warnings in bulk.test.js ([#434](https://github.com/opensearch-project/opensearch-js/issues/434))
diff --git a/RELEASING.md b/RELEASING.md
index 67f56906d..020b556d5 100644
--- a/RELEASING.md
+++ b/RELEASING.md
@@ -34,7 +34,8 @@ Repositories create consistent release labels, such as `v1.0.0`, `v1.1.0` and `v
 The release process is standard across repositories in this org and is run by a release manager volunteering from amongst [maintainers](MAINTAINERS.md).
 
 1. Create a tag, e.g. v2.1.0, and push it to the GitHub repo.
-1. The [release-drafter.yml](.github/workflows/release-drafter.yml) will be automatically kicked off and a draft release will be created.
+1. The [release-drafter.yml](.github/workflows/release-drafter.yml) will be automatically kicked off and is responsible for drafting a new release on GitHub.
+1. Before creating a draft release, this workflow creates a GitHub issue asking for approval from the [maintainers](MAINTAINERS.md). See sample [issue](https://github.com/gaiksaya/opensearch-js/issues/1). The maintainers need to approve in order to continue the workflow run.
 1. This draft release triggers the [jenkins release workflow](https://build.ci.opensearch.org/job/opensearch-js-release/) as a result of which opensearch-js client is released on [npmjs](https://www.npmjs.com/package/@opensearch-project/opensearch).
 1. Once the above release workflow is successful, the drafted release on GitHub is published automatically.
 1. Increment "version" in package.json to the next patch release, e.g. v2.1.1. See [example](https://github.com/opensearch-project/opensearch-js/pull/318)
diff --git a/USER_GUIDE.md b/USER_GUIDE.md
index 579c170e3..d917f93f6 100644
--- a/USER_GUIDE.md
+++ b/USER_GUIDE.md
@@ -10,6 +10,7 @@
   - [Search for the Document](#search-for-the-document)
   - [Delete the document](#delete-the-document)
   - [Delete the index](#delete-the-index)
+  - [Empty all Pool Connections](#empty-all-pool-connections)
 
 ## Initializing a Client
 
@@ -87,7 +88,7 @@ const { AwsSigv4Signer } = require('@opensearch-project/opensearch/aws');
 const client = new Client({
   ...AwsSigv4Signer({
     region: 'us-east-1',
-    service: 'es',  // 'aoss' for OpenSearch Serverless
+    service: 'es', // 'aoss' for OpenSearch Serverless
     // Must return a Promise that resolve to an AWS.Credentials object.
     // This function is used to acquire the credentials when the client start and
     // when the credentials are expired.
@@ -249,4 +250,18 @@ console.log('Deleting all PITs:');
 var response = await client.deleteAllPits();
 
 console.log(response.body);
-```
\ No newline at end of file
+```
+
+## Empty all Pool Connections
+
+```javascript
+var pool = new ConnectionPool({ Connection });
+pool.addConnection('http://localhost:9200/');
+pool.addConnection('http://localhost:9201/');
+
+pool.empty();
+// OR
+pool.empty(() => {
+  // Do something after emptying the pool
+});
+```