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https://issues.apache.org/jira/browse/YARN-1521?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13935336#comment-13935336
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Tsuyoshi OZAWA commented on YARN-1521:
--------------------------------------

We should introduce RetryCache to avoid returning incorrect errors to client if 
non-idempotent RPC(ie. submitApplication) are executed. Opened YARN-1836 for 
this.

> Mark appropriate protocol methods with the idempotent annotation or 
> AtMostOnce annotation
> -----------------------------------------------------------------------------------------
>
>                 Key: YARN-1521
>                 URL: https://issues.apache.org/jira/browse/YARN-1521
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>            Reporter: Xuan Gong
>            Assignee: Xuan Gong
>
> After YARN-1028, we add the automatically failover into RMProxy. This JIRA is 
> to identify whether we need to add idempotent annotation and which methods 
> can be marked as idempotent.



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