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From "Allen Wittenauer (JIRA)" <j...@apache.org>
Subject [jira] [Moved] (YARN-2344) Provide a mechanism to pause the jobtracker
Date Wed, 23 Jul 2014 20:52:40 GMT

     [ https://issues.apache.org/jira/browse/YARN-2344?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Allen Wittenauer moved MAPREDUCE-828 to YARN-2344:
--------------------------------------------------

    Component/s:     (was: jobtracker)
                 resourcemanager
            Key: YARN-2344  (was: MAPREDUCE-828)
        Project: Hadoop YARN  (was: Hadoop Map/Reduce)

> Provide a mechanism to pause the jobtracker
> -------------------------------------------
>
>                 Key: YARN-2344
>                 URL: https://issues.apache.org/jira/browse/YARN-2344
>             Project: Hadoop YARN
>          Issue Type: New Feature
>          Components: resourcemanager
>            Reporter: Hemanth Yamijala
>
> We've seen scenarios when we have needed to stop the namenode for a maintenance activity.
In such scenarios, if the jobtracker (JT) continues to run, jobs would fail due to initialization
or task failures (due to DFS). We could restart the JT enabling job recovery, during such
scenarios. But restart has proved to be a very intrusive activity, particularly if the JT
is not at fault itself and does not require a restart. The ask is for a admin-controlled feature
to pause the JT which would take it to a state somewhat analogous to the safe mode of DFS.



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