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From "Harsh J (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-3516) Possible NPE in org.apache.hadoop.mapred.MapTask.MapOutputBuffer.collect(K key, V value, int partition)
Date Tue, 27 Dec 2011 20:16:30 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-3516?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13176308#comment-13176308
] 

Harsh J commented on MAPREDUCE-3516:
------------------------------------

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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