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https://issues.apache.org/jira/browse/HADOOP-1642?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12540497
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Adrian Woodhead commented on HADOOP-1642:
-----------------------------------------

OK, I patched it using Eclipse and it worked. I just tried from command line 
and I get the same as you. Does it have to work from command line? If so I will 
look into it and try figure out what the issue is....

> Jobs using LocalJobRunner + JobControl fails
> --------------------------------------------
>
>                 Key: HADOOP-1642
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1642
>             Project: Hadoop
>          Issue Type: Bug
>    Affects Versions: 0.14.3
>            Reporter: Johan Oskarsson
>            Assignee: Doug Cutting
>            Priority: Critical
>             Fix For: 0.16.0
>
>         Attachments: HADOOP-1642-2.patch, HADOOP-1642-3.patch, 
> HADOOP-1642-4.patch, HADOOP-1642.patch
>
>
> If I run several jobs at the same time using JobControl and the 
> LocalJobRunner i get:
> java.io.IOException: Target 
> /tmp/hadoop-johan/mapred/local/localRunner/job_local_1.xml already exists.
> It seems like the JobControl class tries to run multiple jobs with the same 
> jobid, causing the exception.

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