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From "Zhijie Shen (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-422) Add NM client library
Date Mon, 06 May 2013 15:48:16 GMT

    [ https://issues.apache.org/jira/browse/YARN-422?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13649809#comment-13649809
] 

Zhijie Shen commented on YARN-422:
----------------------------------

Like ContainerLauncher, I think NMClient is supposed to start when AM starts and stop when
AM stops. IMHO, no matter how long a container keeps running, it should be stopped when the
AM who starts it stops. In addition, NMClient would be the only gate to access NodeManager
(I mean it's not good to use NMClient and the raw RPC proxy simultaneously), such that if
NMClient doesn't stop the running containers when NMClient stops (or AM exits), these containers
may be not stoppable. Semantically, it is not good that AM has already stopped, while the
forked containers keep running.
                
> Add NM client library
> ---------------------
>
>                 Key: YARN-422
>                 URL: https://issues.apache.org/jira/browse/YARN-422
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>            Reporter: Bikas Saha
>            Assignee: Zhijie Shen
>         Attachments: AMNMClient_Defination.txt, AMNMClient_Definition_Updated_With_Tests.txt,
proposal_v1.pdf, YARN-422.1.patch, YARN-422.2.patch, YARN-422.3.patch
>
>
> Create a simple wrapper over the ContainerManager protocol to provide hide the details
of the protocol implementation.

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