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https://issues.apache.org/jira/browse/MAPREDUCE-4371?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13403692#comment-13403692
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Kihwal Lee commented on MAPREDUCE-4371:
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{{TestLocalJobControl}} and {{TestMapReduceJobControl}} are failing in trunk
due to NPE from JobControl#isCircular().
> Check for cyclic dependencies in Jobcontrol job DAG
> ---------------------------------------------------
>
> Key: MAPREDUCE-4371
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-4371
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: mrv1
> Affects Versions: 3.0.0
> Reporter: madhukara phatak
> Fix For: 3.0.0
>
> Attachments: MAPREDUCE-4371-1.patch, MAPREDUCE-4371.patch
>
>
> In current implementation of JobControl, whenever there is a cyclic
> dependency between the jobs it throws a Stack overflow exception. This jira
> adds a cyclic check to jobcontrol.
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