Jing Zhao created HADOOP-9786:
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             Summary: 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


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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