protected void initializeQueues(final int numQueues) {
    if (queueInitArgs.length > 0) {
      currentQueueLimit = (int) queueInitArgs[0];
      queueInitArgs[0] = Math.max((int) queueInitArgs[0], DEFAULT_CALL_QUEUE_SIZE_HARD_LIMIT);
    }
    for (int i = 0; i < numQueues; ++i) {
      queues.add(ReflectionUtils.newInstance(queueClass, queueInitArgs));
    }
  }
Return the {@link RpcCall#getSize()} from {@code callRunner} or 0L.
hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/RpcExecutor.java