Chao Sun created HDFS-14146:
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             Summary: Handle exception from internalQueueCall
                 Key: HDFS-14146
                 URL: https://issues.apache.org/jira/browse/HDFS-14146
             Project: Hadoop HDFS
          Issue Type: Sub-task
          Components: ipc
            Reporter: Chao Sun
            Assignee: Chao Sun


When we re-queue RPC call, the {{internalQueueCall}} will potentially throw 
exceptions (e.g., RPC backoff), which is then swallowed. This will cause the 
RPC to be silently discarded without response to the client, which is not good.



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