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https://issues.apache.org/jira/browse/HADOOP-5338?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12678680#action_12678680
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Amareshwari Sriramadasu commented on HADOOP-5338:
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Patch looks fine to me. But I dont think testcase changes are required.
> Reduce tasks are stuck waiting for map outputs when none are in progress
> ------------------------------------------------------------------------
>
> Key: HADOOP-5338
> URL: https://issues.apache.org/jira/browse/HADOOP-5338
> Project: Hadoop Core
> Issue Type: Bug
> Components: mapred
> Affects Versions: 0.20.0
> Reporter: Ramya R
> Assignee: Amar Kamat
> Priority: Blocker
> Fix For: 0.20.0
>
> Attachments: HADOOP-5338-v2.1.patch, log.txt
>
>
> When JT is restarted several times, a situation is encountered when the
> reduce tasks are stuck forever waiting for map outputs. However 100%map is
> complete and none of the map tasks are in progress. The reduce tasks wait
> infinitely.
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