@Override
      public void processRequest(ByteBuff buf) throws IOException, InterruptedException {
        // this will throw exception after the connection header is read, and an RPC is sent
        // from client
        throw new DoNotRetryIOException("Failing for test");
      }
Tests that the RpcServer creates & dispatches CallRunner object to scheduler with non-null
remoteAddress set to its Call Object
hbase-server/src/test/java/org/apache/hadoop/hbase/ipc/AbstractTestIPC.java