q4q5q6qw commented on issue #15783:
URL: 
https://github.com/apache/dolphinscheduler/issues/15783#issuecomment-2041440466

   ```shell
   [ERROR] 2024-04-04 23:30:01.607 +0800 
org.apache.dolphinscheduler.server.master.runner.WorkflowExecuteRunnable:[317] 
- [WorkflowInstance-197574][TaskInstance-203510] - State event handle error, 
get a unknown exception, will retry this event: 
TaskStateEvent(processInstanceId=197574, taskInstanceId=203510, taskCode=0, 
status=TaskExecutionStatus{code=6, desc='failure'}, type=TASK_STATE_CHANGE, 
key=null, channel=null, context=null)
   java.lang.NullPointerException: null
   ``` 
   
   Is there a direction to troubleshoot the null pointer issue with 
WorkflowExecuteRunnable? The problem cannot be located because the stack 
information is not displayed in the log.


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