我将curator用于newClient，并设置了重试策略，但是如果连接字符串错误，则重试连接将一直运行直到内存不足，但我希望程序退出一次，重试3次。
RetryPolicy retryPolicy = new ExponentialBackoffRetry(1000, 3);
CuratorFrameworkFactory.newClient(zkAddress,retryPolicy);
CuratorFrameworkFactory.builder().connectString(zkAddress)
.sessionTimeoutMs(5000).connectionTimeoutMs(12000)
.retryPolicy(retryPolicy).build();
09:03:18.810 [main-SendThread(0:0:0:0:0:0:0:1:2181)] INFO org.apache.zookeeper.ClientCnxn - Opening socket connection to server 0:0:0:0:0:0:0:1/0:0:0:0:0:0:0:1:2181. Will not attempt to authenticate using SASL (unknown error)
09:03:19.825 [main-SendThread(0:0:0:0:0:0:0:1:2181)] WARN org.apache.zookeeper.ClientCnxn - Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect
java.net.ConnectException: Connection refused: no further information
at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
at sun.nio.ch.SocketChannelImpl.finishConnect(Unknown Source)
at o rg.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:361)
at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1081)