关于java 的报错问题

Question

2018-05-13 16:45:18,441 [localhost-startStop-1] [org.apache.zookeeper.ZooKeeper]-[INFO] Client 2018-05-13 16:45:18,450 [localhost-startStop-1] [org.apache.zookeeper.ClientCnxn]-[DEBUG] zookeeper.disableAutoWatchReset is false2018-05-13 16:45:18,521 [localhost-startStop-1] [org.I0Itec.zkclient.ZkClient]-[DEBUG] Awaiting connection to Zookeeper server2018-05-13 16:45:18,522 [localhost-startStop-1] [org.I0Itec.zkclient.ZkClient]-[DEBUG] Waiting for keeper state SyncConnected2018-05-13 16:45:18,560 [localhost-startStop-1-SendThread(192.168.25.160:2181)] [org.apache.zookeeper.ClientCnxn]-[INFO] Opening socket connection to server 192.168.25.160/192.168.25.160:2181. Will not attempt to authenticate using SASL (unknown error)这个是为什么啊,哪错了，我从网上没有找到