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https://issues.apache.org/jira/browse/HADOOP-3130?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Runping Qi updated HADOOP-3130:
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Attachment: shuffling.log
> Shuffling takes too long to get the last map output.
> ----------------------------------------------------
>
> Key: HADOOP-3130
> URL: https://issues.apache.org/jira/browse/HADOOP-3130
> Project: Hadoop Core
> Issue Type: Bug
> Reporter: Runping Qi
> Attachments: shuffling.log
>
>
> I noticed that towards the end of shufflling, the map output fetcher of the
> reducer backs off too aggressively.
> I attach a fraction of one reduce log of my job.
> Noticed that the last map output was not fetched in 2 minutes.
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