Zhijie Shen commented on YARN-639:

bq. why do we need to do getContainerStatus after successfully starting it? is 
it required?

it's not required for functioning of the distributed shell. However, since 
distributed shell somehow servers as a demo application, I'd like to have 
getContainerStatus there to show the usage of NMClientAsync and its callback 
> Make AM of Distributed Shell Use NMClient
> -----------------------------------------
>                 Key: YARN-639
>                 URL: https://issues.apache.org/jira/browse/YARN-639
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: applications/distributed-shell
>            Reporter: Zhijie Shen
>            Assignee: Zhijie Shen
>         Attachments: YARN-639.1.patch
> YARN-422 adds NMClient. AM of Distributed Shell should use it instead of 
> using ContainerManager directly.

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