ruanwenjun edited a comment on issue #5525:
URL: 
https://github.com/apache/dolphinscheduler/issues/5525#issuecomment-843833139


   @wangxj3 Yeal, I also noticed this problem, this caused by each instance 
will listen the node path in zookeeper. 
   ~~One possible solution is to get the lock on zookeeper when insert the 
instance crash alert.~~
   Can we think each instance should save at most one unsent instance alert in 
database?


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