Github user sujith71955 commented on the issue:
https://github.com/apache/spark/pull/22572
> Is the value logged here always null?
> I am not sure if it's meaningful to log mapreduce.job.id, especially
given its name. If there's no meaningful job ID here do we are about it at all?
how about deleting the log?
> `SparkHadoopWriter` does something similar.
even initially i thought the same, not sure whether mapreduce.job.id makes
sense here, but i think we shall not display null . Deleting the log will be
the easiest option but just curious to know why were trying to log a map
reduce job id .
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