网上说，遇到此错误是因为SASL验证，取消掉此验证就可以了。给出了如下代码

1. configuration.setReconnectionAllowed(true);            

2.  configuration.setSecurityMode(ConnectionConfiguration.SecurityMode.disabled);             

3.  configuration.setSendPresence(true);    

4.  configuration.setSASLAuthenticationEnabled(false);    

5.  configuration.setRosterLoadedAtLogin(false);    

1. config.setSASLAuthenticationEnabled(false);  

2. config.setSecurityMode(ConnectionConfiguration.SecurityMode.disabled);