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https://issues.apache.org/jira/browse/HADOOP-5908?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12712702#action_12712702
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Vinod K V commented on HADOOP-5908:
-----------------------------------
This situation occurs if scheduler is invoked and it calls
job.obtainNewMapTask() while the job-clean-up task of this job is still
running. Discussed with this Devaraj who concurs that
obtainNewMapTask()/obtainNewReduceTask() should return immediately, doing
nothing, when job-cleanup is running.
> ArithmeticException in heartbeats with zero map jobs
> ----------------------------------------------------
>
> Key: HADOOP-5908
> URL: https://issues.apache.org/jira/browse/HADOOP-5908
> Project: Hadoop Core
> Issue Type: Bug
> Components: mapred
> Reporter: Vinod K V
> Assignee: Amar Kamat
>
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