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From "Bikas Saha (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-417) Add a poller that allows the AM to receive notifications when it is assigned containers
Date Tue, 05 Mar 2013 18:08:13 GMT

    [ https://issues.apache.org/jira/browse/YARN-417?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13593689#comment-13593689
] 

Bikas Saha commented on YARN-417:
---------------------------------

Please do use join and make sure all the threads are complete and get cleaned up. It may be
a convenience to call stop() in the callback but I dont think we should encourage that. It
might be fine now but not future proof. Its not uncommon for API's to require users to be
well behaved. As far as such use cases are concerned, since we have made this class an AbstractService,
the common use case would be to init and start the service in the beginning and the stop it
in the end, similar to other services.
                
> Add a poller that allows the AM to receive notifications when it is assigned containers
> ---------------------------------------------------------------------------------------
>
>                 Key: YARN-417
>                 URL: https://issues.apache.org/jira/browse/YARN-417
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: api, applications
>    Affects Versions: 2.0.3-alpha
>            Reporter: Sandy Ryza
>            Assignee: Sandy Ryza
>         Attachments: AMRMClientAsync-1.java, AMRMClientAsync.java, YARN-417-1.patch,
YARN-417-2.patch, YARN-417-3.patch, YARN-417.patch, YarnAppMaster.java, YarnAppMasterListener.java
>
>
> Writing AMs would be easier for some if they did not have to handle heartbeating to the
RM on their own.

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