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https://issues.apache.org/jira/browse/YARN-873?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13711949#comment-13711949
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Xuan Gong commented on YARN-873:
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create the new Exception class called ApplicationNotFoundException. At
ClientRMService#getApplicationReport(), instead of simply return null, we will
throw out ApplicationNotFoundException. And at ApplicationCLI, we specifically
catch the ApplicationNotFoundException exception, simply print out the message
and return 0.
There are other several place where the YarnClient.getApplicationReport() will
be used. But I only handle the exception at ApplicationCLI, because
ApplicationCLI is the only place that applicationId will be provided by the
user.
> YARNClient.getApplicationReport(unknownAppId) returns a null report
> -------------------------------------------------------------------
>
> Key: YARN-873
> URL: https://issues.apache.org/jira/browse/YARN-873
> Project: Hadoop YARN
> Issue Type: Sub-task
> Affects Versions: 2.1.0-beta
> Reporter: Bikas Saha
> Assignee: Xuan Gong
> Attachments: YARN-873.1.patch
>
>
> How can the client find out that app does not exist?
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