This is an automated cherry-pick of #10393

Signed-off-by: ti-chi-bot <ti-community-prow-bot@tidb.io>

TOC.md

@@ -777,6 +777,7 @@
     - [5.4.1](/releases/release-5.4.1.md)
     - [5.4.0](/releases/release-5.4.0.md)
   - v5.3
+    - [5.3.3](/releases/release-5.3.3.md)
     - [5.3.2](/releases/release-5.3.2.md)
     - [5.3.1](/releases/release-5.3.1.md)
     - [5.3.0](/releases/release-5.3.0.md)

releases/release-5.3.3.md

@@ -0,0 +1,23 @@
+---
+title: TiDB 5.3.3 Release Note
+---
+
+# TiDB 5.3.3 Release Note
+
+Release date: September 14, 2022
+
+TiDB version: 5.3.3
+
+## Bug fix
+
++ TiKV
+
+    - Fix the issue of continuous SQL execution errors in the cluster after the PD leader is switched or PD is restarted.
+
+        This issue is caused by a TiKV bug that TiKV does not retry sending heartbeat information to PD client after heartbeat requests fail, until TiKV reconnects to PD client. As a result, the Region information on the failed TiKV node becomes outdated, and TiDB cannot get the latest Region information, which causes SQL execution errors.
+
+        This issue is fixed in v5.3. You can upgrade your cluster to v5.3.3.
+
+        As a workaround, you can also restart the TiKV nodes that cannot send Region heartbeat to PD, until there is no Region heartbeat to send.
+
+        For bug details, see [#12934](https://github.com/tikv/tikv/issues/12934).

releases/release-notes.md

@@ -16,6 +16,7 @@ title: Release Notes
 
 ## 5.3
 
+- [5.3.3](/releases/release-5.3.3.md)
 - [5.3.2](/releases/release-5.3.2.md)
 - [5.3.1](/releases/release-5.3.1.md)
 - [5.3.0](/releases/release-5.3.0.md)

releases/release-timeline.md

@@ -9,6 +9,12 @@ This document shows all the released TiDB versions in reverse chronological orde
 
 | Version | Release Date |
 | :--- | :--- |
+<<<<<<< HEAD
+=======
+| [5.3.3](/releases/release-5.3.3.md) | 2022-09-14 |
+| [6.1.1](/releases/release-6.1.1.md) | 2022-09-01 |
+| [6.2.0-DMR](/releases/release-6.2.0.md) | 2022-08-23 |
+>>>>>>> 1935d74ad (release: add TiDB 5.3.3 release note (#10393))
 | [5.4.2](/releases/release-5.4.2.md) | 2022-07-08 |
 | [5.3.2](/releases/release-5.3.2.md) | 2022-06-29 |
 | [5.4.1](/releases/release-5.4.1.md) | 2022-05-13 |