caishunfeng commented on issue #15221:
URL: 
https://github.com/apache/dolphinscheduler/issues/15221#issuecomment-1827316627

   ```
   [INFO] 2023-11-24 16:19:28.787 +0800 org.apache.zookeeper.ClientCnxn:[1158] 
- [WorkflowInstance-0][TaskInstance-0] - Unable to read additional data from 
server sessionid 0x30097c18ee20003, likely server has closed socket, closing 
socket connection and attempting reconnect
   [INFO] 2023-11-24 16:19:28.888 +0800 
org.apache.curator.framework.state.ConnectionStateManager:[251] - 
[WorkflowInstance-0][TaskInstance-0] - State change: SUSPENDED
   [WARN] 2023-11-24 16:19:28.888 +0800 
org.apache.dolphinscheduler.plugin.registry.zookeeper.ZookeeperConnectionStateListener:[52]
 - [WorkflowInstance-0][TaskInstance-0] - Registry suspended
   ```
   
   It seems the registry connection was closed or expired, please check the 
network for it.


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