Yikf commented on PR #40064:
URL: https://github.com/apache/spark/pull/40064#issuecomment-1441179787

   @mridulm Thanks your review, this is a nice question for me, `JobId` maybe 
is different when each time the class is deserialized.
   
   How about this idea that `SparkHadoopWriterUtils.createJobTrackerID` to 
generate an ID for a job tracker, and the job tracker is unique, JobId is 
constructed using a unique tackerid when the class is deserialized.


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