Github user andrewor14 commented on the pull request:
https://github.com/apache/spark/pull/11978#issuecomment-204517168
@rajeshbalamohan the point of cleaning a closure is because it might be
passed in by the user. If we provide the closure internally then we don't have
to clean it. Before this patch we used to clean the user's closure in
`sc.hadoopRDD`, but after this patch we don't do that anymore. That regresses
behavior.
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