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https://issues.apache.org/jira/browse/HADOOP-2639?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12560925#action_12560925
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Amar Kamat commented on HADOOP-2639:
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I ran sort-100 with a bunch of maps not serving output to a bunch of reducers,
here 10 maps blocking 5 reducers. The job ran to completion. I am not able to
reproduce the error. Is there a way to reproduce the error.
> Reducers stuck in shuffle
> -------------------------
>
> Key: HADOOP-2639
> URL: https://issues.apache.org/jira/browse/HADOOP-2639
> Project: Hadoop
> Issue Type: Bug
> Reporter: Amareshwari Sri Ramadasu
> Assignee: Amar Kamat
> Priority: Blocker
> Fix For: 0.16.0
>
>
> I started sort benchmark on 500 nodes. It has 40000 maps and 900 reducers.
> There are 11 reducers stuck in shuffle with 33% progress. I could see a node
> down which ran 80 maps on it. And all these reducers are trying to fetch map
> output from that node.
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