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From "Sanjay Dahiya (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-239) job tracker WI drops jobs after 24 hours
Date Mon, 07 Aug 2006 19:48:16 GMT
    [ http://issues.apache.org/jira/browse/HADOOP-239?page=comments#action_12426306 ] 
            
Sanjay Dahiya commented on HADOOP-239:
--------------------------------------

I agree, but to display the status of running job we can use the existing infrastructure rather
than the log file as it already provides the most current status. We will log as things happen
but use it for display when job fails/completes or job tracker restarts. 
Yes, the current functionality should be the minimum thats available in the log.

> job tracker WI drops jobs after 24 hours
> ----------------------------------------
>
>                 Key: HADOOP-239
>                 URL: http://issues.apache.org/jira/browse/HADOOP-239
>             Project: Hadoop
>          Issue Type: Bug
>          Components: mapred
>            Reporter: Yoram Arnon
>         Assigned To: Sanjay Dahiya
>            Priority: Minor
>
> The jobtracker's WI, keeps track of jobs executed in the past 24 hours.
> if the cluster was idle for a day (say Sunday) it drops all its history.
> Monday morning, the page is empty.
> Better would be to store a fixed number of jobs (say 10 each of succeeded and failed
jobs).
> Also, if the job tracker is restarted, it loses all its history.
> The history should be persistent, withstanding restarts and upgrades.

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