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From "Sunil G (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-5932) Retrospect moveApplicationToQueue in align with YARN-5611
Date Wed, 30 Nov 2016 14:51:58 GMT

    [ https://issues.apache.org/jira/browse/YARN-5932?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15708785#comment-15708785

Sunil G commented on YARN-5932:

Thanks [~rohithsharma].

As discussed, there are some similar changes done in FairScheduler too.

A quick summary of changes.
1. Introduced {{preValidateMoveApplication}} api to validate whether move operation can be
successful or not. Few code is taken out from FS#moveApplication for same.
2. By using above api, we are trying to achieve a similar behavior for all app update changes
from cli/rest etc. 

[~kasha], could you please help to take a look. 

[~rohithsharma], please help to add any points if I missed some. Thank you.

> Retrospect moveApplicationToQueue in align with YARN-5611
> ---------------------------------------------------------
>                 Key: YARN-5932
>                 URL: https://issues.apache.org/jira/browse/YARN-5932
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: capacity scheduler, resourcemanager
>            Reporter: Sunil G
>            Assignee: Sunil G
>         Attachments: YARN-5932.v0.patch, YARN-5932.v1.patch
> All dynamic api's of an application's state change could follow a general design approach.
Currently priority and app timeouts are following this approach all corner cases.
> *Steps*
> - Do a pre-validate check to ensure that changes are fine.
> - Update this information to state-store
> - Perform real move operation and update in-memory data structures.

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