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https://issues.apache.org/jira/browse/HADOOP-831?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Koji Noguchi resolved HADOOP-831.
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Resolution: Duplicate
Duplicate of HADOOP-4038
> A command for locking the JobTracker to stop receiving new job requests.
> ------------------------------------------------------------------------
>
> Key: HADOOP-831
> URL: https://issues.apache.org/jira/browse/HADOOP-831
> Project: Hadoop Core
> Issue Type: New Feature
> Components: mapred
> Reporter: Koji Noguchi
> Assignee: Owen O'Malley
> Priority: Minor
>
> When I want to restart or upgrade the JobTracker, it'll be useful to have a
> feature to lock the JobTracker so that it won't accept any more jobs. This
> way, I can wait for the current running jobs to finish and then safely
> restart the MR cluster.
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