Github user devaraj-kavali commented on the issue:
https://github.com/apache/spark/pull/19741
Thanks @jerryshao for looking into this.
> From my understanding, the above exception seems no harm to the Spark
application, just running into some threading corner case during stop, am I
right?
Yeah, It doesn't cause any functional problem but these exceptions create
suspect in the user's mind that some thing went wrong with the spark
application, and then they would start diagnosing/debugging the cause which
wastes lot of time or creates wrong impression. I think this should be fixed to
avoid the suspect/confusion.
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