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https://issues.apache.org/jira/browse/HADOOP-1183?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Devaraj Das updated HADOOP-1183:
--------------------------------

    Attachment: 1183.new.patch

This patch does a slightly better handling of failed maps. It records only 
those failed maps whose outputs we haven't fetched yet.

> MapTask completion not recorded properly at the Reducer's end
> -------------------------------------------------------------
>
>                 Key: HADOOP-1183
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1183
>             Project: Hadoop
>          Issue Type: Bug
>          Components: mapred
>            Reporter: Devaraj Das
>         Assigned To: Devaraj Das
>            Priority: Critical
>         Attachments: 1183.new.patch, 1183.patch
>
>
> A couple of reducers were continuously trying to fetch map outputs from a 
> lost tasktracker. Although the tasks running on that lost TT successfully 
> reexecuted elsewhere, the Reducers' tasktrackers didn't correctly note those 
> events.

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