baohe-zhang commented on pull request #31945:
URL: https://github.com/apache/spark/pull/31945#issuecomment-806022295


   @attilapiros 
   I haven't know the root cause of it, but I saw this exception occurs quite 
frequently in pyspark machine learning (with external ML library) jobs. As 
@dhruve said, the lag between getting all pids and getting stat of each pid 
could be the cause.


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