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https://issues.apache.org/jira/browse/MAPREDUCE-78?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13408725#comment-13408725
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Harsh J commented on MAPREDUCE-78:
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Owen,
I wonder if this was happening cause the TT connected with a different port
each time, and the checks of host took the whole TT ID (including its client
port) instead of just the hostname?
> tasks should not run on nodes where they were previously lost
> -------------------------------------------------------------
>
> Key: MAPREDUCE-78
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-78
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Reporter: Owen O'Malley
>
> We had a case where a task tracker was getting lost every 15 minutes and the
> same reduce kept getting scheduled on it (15 times). Tasks that are killed
> should not reschedule on the node where they were previously killed.
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