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https://issues.apache.org/jira/browse/HADOOP-4246?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12635788#action_12635788
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Arun C Murthy commented on HADOOP-4246:
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The "if (a < b) a=b;" pieces should used Math.max instead...
> Reduce task copy errors may not kill it eventually
> --------------------------------------------------
>
> Key: HADOOP-4246
> URL: https://issues.apache.org/jira/browse/HADOOP-4246
> Project: Hadoop Core
> Issue Type: Bug
> Components: mapred
> Affects Versions: 0.19.0
> Reporter: Amareshwari Sriramadasu
> Assignee: Amareshwari Sriramadasu
> Priority: Blocker
> Fix For: 0.19.0
>
> Attachments: patch-4246.txt, patch-4246.txt, patch-4246.txt
>
>
> maxFetchRetriesPerMap in reduce task can be zero some times (when
> maxMapRunTime is less than 4 seconds or mapred.reduce.copy.backoff is less
> than 4). This will not count reduce task copy errors to kill it eventually.
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