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From "Enis Soztutar (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-2266) Provide a command line option to check if a Hadoop jobtracker is idle
Date Mon, 26 Nov 2007 08:20:43 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-2266?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12545356

Enis Soztutar commented on HADOOP-2266:

bq. Another approach to this would be to have an admin command for the job tracker that would
have the job tracker stop accepting new jobs and shut itself down when the last job completed.
I remember this was discussed before but never implemented. I think this and a command to
gracefully stop the jt would be great. 

> Provide a command line option to check if a Hadoop jobtracker is idle
> ---------------------------------------------------------------------
>                 Key: HADOOP-2266
>                 URL: https://issues.apache.org/jira/browse/HADOOP-2266
>             Project: Hadoop
>          Issue Type: New Feature
>          Components: mapred
>            Reporter: Hemanth Yamijala
>             Fix For: 0.16.0
> 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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