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https://issues.apache.org/jira/browse/HADOOP-1642?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12514252
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Doug Cutting commented on HADOOP-1642:
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I have seen unit tests fail with this message on recent trunk versions. I
don't think the bug is specific to JobControl, but is rather with
LocalJobRunner.
> Jobs using LocalJobRunner + JobControl fails
> --------------------------------------------
>
> Key: HADOOP-1642
> URL: https://issues.apache.org/jira/browse/HADOOP-1642
> Project: Hadoop
> Issue Type: Bug
> Affects Versions: 0.13.0
> Reporter: Johan Oskarsson
> Priority: Critical
> Fix For: 0.14.0
>
>
> 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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