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From "Sunil G (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-4091) Add REST API to retrieve scheduler activity
Date Mon, 01 Aug 2016 17:21:20 GMT

    [ https://issues.apache.org/jira/browse/YARN-4091?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15402448#comment-15402448
] 

Sunil G commented on YARN-4091:
-------------------------------

Thanks. [~ChenGe] for the clarification. For 8, if we query by app, even though app is in
pending list, could we able to get state and a diagnosis. If there is much of design change,
i think we can have this as an improvement in another ticket. 
Meantime, could you pls check the test report. I might not have added or copied all comments
from test report to jira. So pls help to check *comments* section in test report. Thank you.


> Add REST API to retrieve scheduler activity
> -------------------------------------------
>
>                 Key: YARN-4091
>                 URL: https://issues.apache.org/jira/browse/YARN-4091
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: capacity scheduler, resourcemanager
>    Affects Versions: 2.7.0
>            Reporter: Sunil G
>            Assignee: Chen Ge
>         Attachments: Improvement on debugdiagnostic information - YARN.pdf, SchedulerActivityManager-TestReport
v2.pdf, SchedulerActivityManager-TestReport.pdf, YARN-4091-design-doc-v1.pdf, YARN-4091.1.patch,
YARN-4091.2.patch, YARN-4091.3.patch, YARN-4091.4.patch, YARN-4091.5.patch, YARN-4091.5.patch,
YARN-4091.preliminary.1.patch, app_activities.json, node_activities.json
>
>
> As schedulers are improved with various new capabilities, more configurations which tunes
the schedulers starts to take actions such as limit assigning containers to an application,
or introduce delay to allocate container etc. 
> There are no clear information passed down from scheduler to outerworld under these various
scenarios. This makes debugging very tougher.
> This ticket is an effort to introduce more defined states on various parts in scheduler
where it skips/rejects container assignment, activate application etc. Such information will
help user to know whats happening in scheduler.
> Attaching a short proposal for initial discussion. We would like to improve on this as
we discuss.



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