truong-hua opened a new issue, #3529:
URL: https://github.com/apache/bookkeeper/issues/3529

   **BUG REPORT**
   
   1. Please describe the issue you observed:
   
   - What did you do?
   I'm using Bookeeper 4.14.4 and runing a 5 nodes cluster. When one node of my 
bookie cluster is down, the bookie cluster send a lot of request to zookeeper 
and causes ZK CPU usage always over 100%.
   The issue gone when the failed node is recover and rejoin in to the cluster 
properly.
   
   This is my JAVA env:
   ```
   openjdk 11.0.13 2021-10-19
   OpenJDK Runtime Environment (build 11.0.13+8-Ubuntu-0ubuntu1.20.04)
   OpenJDK 64-Bit Server VM (build 11.0.13+8-Ubuntu-0ubuntu1.20.04, mixed mode, 
sharing)
   ```
   
   The zookeeper version: 3.7.1
   
   - What did you expect to see?
   Bookie should not causes ZK CPU consumption when the cluster is degraded.
   
   - What did you see instead?
   ZK CPU stuck at >100% and it causes more server performance problems.
   


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