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https://issues.apache.org/jira/browse/MAPREDUCE-3516?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13176308#comment-13176308
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Harsh J commented on MAPREDUCE-3516:
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I'm +1 for better error messages over javadocs. I think this is more of an
user-error situation, than it is a behavior/warning.
Would this regress any stuff with various serializations, that may even accept
a 'null' as some valid k/v? Or does that have no chance to pass at all, since
we attempt to call general methods on top of the key/value instances?
> Possible NPE in org.apache.hadoop.mapred.MapTask.MapOutputBuffer.collect(K
> key, V value, int partition)
> -------------------------------------------------------------------------------------------------------
>
> Key: MAPREDUCE-3516
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-3516
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: mrv2
> Affects Versions: 0.20.1, 0.20.2, 0.20.203.0, 0.20.205.0, 0.23.0
> Reporter: Subroto Sanyal
> Assignee: Subroto Sanyal
>
> *org.apache.hadoop.mapred.MapTask.MapOutputBuffer.collect* accepts a pair of
> Key and Value. There is chance that if somehow if a Null value or Key is
> passed to the method, we can end up having NPE.
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