刚刚弄Hazelcast 不太懂，求救于各位大神们，在线等候。

我的代码，包已经加入classpath:

 ClientConfig clientConfig = new ClientConfig();
  clientConfig.addAddress("127.0.0.1:5701");
  HazelcastInstance client = HazelcastClient.newHazelcastClient(clientConfig);
  IMap map = client.getMap("customers");
  System.out.println("Map Size:" + map.size());

出现如下错误：

信息: ConnectionManager shutdown
Exception in thread "main" java.lang.IllegalStateException: Unable to connect to cluster
 at com.hazelcast.client.HazelcastClient.<init>(HazelcastClient.java:97)
 at com.hazelcast.client.HazelcastClient.newHazelcastClient(HazelcastClient.java:143)
 at GettingStarted.main(GettingStarted.java:26)