Japson0 commented on issue #5555:
URL: https://github.com/apache/seatunnel/issues/5555#issuecomment-1738603955

   I found that JDBCSourceReader added a lock when reading the data, but the 
lock could not be retrieved from triggerBarrier in SourceFlowLifeCycle, so this 
task could not ack successfully。 
   Even if I didn't need a checkpoint, I would eventually get an error if I 
exceeded the checkpoint  timeout
   
   
![image](https://github.com/apache/seatunnel/assets/33944862/a85ee588-c379-420c-8414-a5c31a558460)
   
   
![image](https://github.com/apache/seatunnel/assets/33944862/b9f40d6c-8e73-475f-989f-9e0bd0c6279c)
   


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