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https://issues.apache.org/jira/browse/MAPREDUCE-4328?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13291594#comment-13291594
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Arun C Murthy commented on MAPREDUCE-4328:
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I'm thinking in the quiesced mode the JT:
# Doesn't schedule anymore tasks.
# Doesn't mark *any* task as FAILED (every task is KILLED).
# Doesn't accept new job submissions.
> Add the option to quiesce the JobTracker
> ----------------------------------------
>
> Key: MAPREDUCE-4328
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-4328
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: mrv1
> Affects Versions: 1.0.3
> Reporter: Arun C Murthy
> Assignee: Arun C Murthy
>
> In several failure scenarios it would be very handy to have an option to
> quiesce the JobTracker.
> Recently, we saw a case where the NameNode had to be rebooted at a customer
> due to a random hardware failure - in such a case it would have been nice to
> not lose jobs by quiescing the JobTracker.
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