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From "Robert Chansler (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-4576) Modify pending tasks count in the UI to pending jobs count in the UI
Date Tue, 03 Mar 2009 18:30:56 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-4576?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Robert Chansler updated HADOOP-4576:

    Release Note: Changed capacity scheduler UI to better present number of running and pending
    Hadoop Flags: [Incompatible change, Reviewed]  (was: [Reviewed, Incompatible change])

Edit release note for publication.

> Modify pending tasks count in the UI to pending jobs count in the UI
> --------------------------------------------------------------------
>                 Key: HADOOP-4576
>                 URL: https://issues.apache.org/jira/browse/HADOOP-4576
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: contrib/capacity-sched
>    Affects Versions: 0.19.0
>            Reporter: Hemanth Yamijala
>            Assignee: Sreekanth Ramakrishnan
>             Fix For: 0.20.0
>         Attachments: HADOOP-4576-1.patch, HADOOP-4576-2.patch, HADOOP-4576-3.patch, HADOOP-4576-4.patch,
HADOOP-4576-5.patch, HADOOP-4576-6.patch, waitingjobs1.png
> The UI for capacity scheduler displays 'pending tasks' counts. However the capacity scheduler
does not update these counts to be the actual values for optimization purposes, for e.g. to
avoid walking all pending jobs on all heartbeats. Hence this information is not very accurate.
> Also, while 'running tasks' counts are useful to compare against capacities and limits,
'pending tasks' counts do not add too much user value. A better count to display would be
the number of running and pending jobs.

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