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From "Hemanth Yamijala (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-4576) Modify pending tasks count in the UI to pending jobs count in the UI
Date Fri, 05 Dec 2008 03:58:44 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-4576?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12653615#action_12653615
] 

Hemanth Yamijala commented on HADOOP-4576:
------------------------------------------

I think it is not necessary to deprecate the constructor of SchedulingInfo. It is a private
static inner class and hence nobody should be affected ? It would just add more code to maintain.
Can you please submit a new patch removing the deprecation and just changing the api ? Please
also remember to remove the checks for null in the toString method, as the object is not expected
to be null after this change.

BTW, I spoke to Amar about this and we agree on this point now.

> 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
>         Attachments: HADOOP-4576-1.patch, HADOOP-4576-2.patch, HADOOP-4576-3.patch, HADOOP-4576-4.patch,
HADOOP-4576-5.patch
>
>
> 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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