protected void startHandlers(final int port) {
    List<BlockingQueue<CallRunner>> callQueues = getQueues();
    startHandlers(null, handlerCount, callQueues, 0, callQueues.size(), port, activeHandlerCount);
  }
Returns the list of request queues
hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/RpcExecutor.java