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From "Allen Wittenauer (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (MAPREDUCE-229) Provide a command line option to check if a Hadoop jobtracker is idle
Date Thu, 17 Jul 2014 18:43:06 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-229?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Allen Wittenauer resolved MAPREDUCE-229.
----------------------------------------

    Resolution: Fixed

I'm going to close this as fixed.

Clients can ask the JT if they are currently busy.  By doing this periodically, they can build
an idle time.

> Provide a command line option to check if a Hadoop jobtracker is idle
> ---------------------------------------------------------------------
>
>                 Key: MAPREDUCE-229
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-229
>             Project: Hadoop Map/Reduce
>          Issue Type: New Feature
>            Reporter: Hemanth Yamijala
>
> This is an RFE for providing a way to determine from the hadoop command line whether
a jobtracker is idle. One possibility is to have something like hadoop jobtracker -idle <time>.
Hadoop would return true (maybe via some stdout output) if the jobtracker had no work to do
(jobs running / prepared) since <time> seconds, false otherwise.
> This would be useful for management / provisioning systems like Hadoop-On-Demand [HADOOP-1301],
which can then deallocate the idle, provisioned clusters automatically, and release resources.



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