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https://issues.apache.org/jira/browse/HADOOP-9786?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jing Zhao updated HADOOP-9786:
------------------------------

    Attachment: HADOOP-9786.001.patch

Initial patch.
                
> RetryInvocation#isRpcInvocation should support ProtocolTranslator 
> ------------------------------------------------------------------
>
>                 Key: HADOOP-9786
>                 URL: https://issues.apache.org/jira/browse/HADOOP-9786
>             Project: Hadoop Common
>          Issue Type: Bug
>    Affects Versions: 3.0.0
>            Reporter: Jing Zhao
>            Assignee: Jing Zhao
>         Attachments: HADOOP-9786.001.patch
>
>
> Currently RetryInvocation#isRpcInvocation directly uses Proxy#isProxyClass to 
> check RetryInvocation#currentProxy. However, if currentProxy is an instance 
> of ProtocolTranslator (e.g., ClientNamenodeProtocolTranslatorPB), the real 
> dynamically-generated proxy object is contained within currentProxy and needs 
> to be retrieved by calling ProtocolTranslator#getUnderlyingProxyObject.

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