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Posted to mapreduce-issues@hadoop.apache.org by "Allen Wittenauer (JIRA)" <ji...@apache.org> on 2015/05/06 05:36:05 UTC
[jira] [Updated] (MAPREDUCE-5748) Potential null pointer deference
in ShuffleHandler#Shuffle#messageReceived()
[ https://issues.apache.org/jira/browse/MAPREDUCE-5748?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Allen Wittenauer updated MAPREDUCE-5748:
----------------------------------------
Labels: BB2015-05-TBR (was: )
> Potential null pointer deference in ShuffleHandler#Shuffle#messageReceived()
> ----------------------------------------------------------------------------
>
> Key: MAPREDUCE-5748
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-5748
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Reporter: Ted Yu
> Priority: Minor
> Labels: BB2015-05-TBR
> Attachments: 0001-MAPREDUCE-5748-Potential-null-pointer-deference-in-S.patch
>
>
> Starting around line 510:
> {code}
> ChannelFuture lastMap = null;
> for (String mapId : mapIds) {
> ...
> }
> lastMap.addListener(metrics);
> lastMap.addListener(ChannelFutureListener.CLOSE);
> {code}
> If mapIds is empty, lastMap would remain null, leading to NPE in addListener() call.
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