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From "Amareshwari Sriramadasu (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-6439) Shuffle deadlocks on wrong number of maps
Date Wed, 21 Apr 2010 04:52:51 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-6439?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12859195#action_12859195

Amareshwari Sriramadasu commented on HADOOP-6439:

bq. However, I tried to see if the patch applies to branch 0.21 as well, since this is a blocker
for that version. The patch failed to apply, unfortunately. Can you please upload a patch
for that as well ? 
@Hemanth, I don't think we need to update patches for branch 0.21, as per discussion in general
mailing list, branch 0.21 will be cut from trunk itself. 
@Tom, please correct me if I'm wrong.

> 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: V.V.Chaitanya Krishna
>            Priority: Blocker
>             Fix For: 0.21.0, 0.22.0
>         Attachments: HADOOP-6439-1.patch, HADOOP-6439-2.patch, HADOOP-6439-3.patch, HADOOP-6439-4.patch,
HADOOP-6439-5.patch, HADOOP-6439-6.patch, HADOOP-6439-6.patch, HADOOP-6439-7.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
> But my reduces got stuck at 2 maps / 12 when there were only 2 maps in the job.

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