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https://issues.apache.org/jira/browse/HADOOP-6439?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12792367#action_12792367
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Amareshwari Sriramadasu commented on HADOOP-6439:
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Changes look fine to me.
> Shuffle deadlocks on wrong number of maps
> -----------------------------------------
>
> Key: HADOOP-6439
> URL: https://issues.apache.org/jira/browse/HADOOP-6439
> Project: Hadoop Common
> Issue Type: Bug
> Components: conf
> Affects Versions: 0.21.0, 0.22.0
> Reporter: Owen O'Malley
> Assignee: Owen O'Malley
> Priority: Blocker
> Fix For: 0.21.0, 0.22.0
>
> Attachments: HADOOP-6439-1.patch, HADOOP-6439-2.patch,
> HADOOP-6439-3.patch, mr-1252.patch
>
>
> The new shuffle assumes that the number of maps is correct. The new
> JobSubmitter sets the old value. Something misfires in the middle causing:
> 09/12/01 00:00:15 WARN conf.Configuration: mapred.job.split.file is
> deprecated. Instead, use mapreduce.job.splitfile
> 09/12/01 00:00:15 WARN conf.Configuration: mapred.map.tasks is deprecated.
> Instead, use mapreduce.job.maps
> But my reduces got stuck at 2 maps / 12 when there were only 2 maps in the
> job.
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