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https://issues.apache.org/jira/browse/HADOOP-4714?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12651511#action_12651511
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Jothi Padmanabhan commented on HADOOP-4714:
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One way to do this would be to pass an AtomicInteger as an additional argument
to Merger.WriteFile. This would be a running counter and would be passed to the
Merge function as well. Thoughts?
> map tasks timing out during merge phase
> ---------------------------------------
>
> Key: HADOOP-4714
> URL: https://issues.apache.org/jira/browse/HADOOP-4714
> Project: Hadoop Core
> Issue Type: Bug
> Components: mapred
> Affects Versions: 0.18.1
> Reporter: Christian Kunz
>
> With compression of transient data turned on some parts of the merge phase
> seem to not report progress enough.
> We see a lot of task failures during the merge phase, most of them timing out
> (even with a 20 min timeout)
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