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https://issues.apache.org/jira/browse/HADOOP-4011?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jothi Padmanabhan resolved HADOOP-4011.
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Resolution: Won't Fix
This is no longer an issue
> shuffling backoff 5 minutes despite the whole cluster is idle
> -------------------------------------------------------------
>
> Key: HADOOP-4011
> URL: https://issues.apache.org/jira/browse/HADOOP-4011
> Project: Hadoop Core
> Issue Type: Bug
> Components: mapred
> Reporter: Runping Qi
> Assignee: Amareshwari Sriramadasu
>
> A reducer of a mapred job got a read time out exception during fetching the
> last map output segment.
> The reducer waited 5 minutes before re-fetch the map output, even though the
> whole cluster was idle during that period.
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