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https://issues.apache.org/jira/browse/HADOOP-2037?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12642642#action_12642642
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Amar Kamat commented on HADOOP-2037:
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Looks like {{getNewJobId()}} in {{JobTracker}} doesnt check if the
initialization is complete. Also this is fixed in 0.15.
> job_null_0001 in jobid
> ----------------------
>
> Key: HADOOP-2037
> URL: https://issues.apache.org/jira/browse/HADOOP-2037
> Project: Hadoop Core
> Issue Type: Bug
> Components: mapred
> Affects Versions: 0.14.1
> Reporter: Koji Noguchi
> Assignee: Owen O'Malley
> Priority: Critical
>
> When I submit a job before jobtracker is fully up, I occasionally get jobid
> of job_null_0001.
> [knoguchi ]$ hadoop -jar ...
> 07/10/12 00:15:07 INFO mapred.FileInputFormat: Total input paths to process :
> 4
> 07/10/12 00:15:08 INFO mapred.JobClient: Running job: *job_null_0001*
> 07/10/12 00:15:09 INFO mapred.JobClient: map 0% reduce 0%
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