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https://issues.apache.org/jira/browse/MAPREDUCE-2727?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13078355#comment-13078355
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Robert Joseph Evans commented on MAPREDUCE-2727:
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+1 the patch looks fairly simple and straight forward even without tests, but
it would be nice to have a unit test or two to verify that it works.
> MR-279: SleepJob throws divide by zero exception when count = 0
> ---------------------------------------------------------------
>
> Key: MAPREDUCE-2727
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-2727
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: mrv2
> Affects Versions: 0.23.0
> Reporter: Jeffrey Naisbitt
> Assignee: Jeffrey Naisbitt
> Fix For: 0.23.0
>
> Attachments: MAPREDUCE-2727.patch
>
>
> When the count is 0 for mappers or reducers, a divide-by-zero exception is
> thrown. There are existing checks to error out when count < 0, which
> obviously doesn't handle the 0 case. This is causing the MRReliabilityTest
> to fail.
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