ls объясните

[10:48:41] INFO Loaded 127 server names
Exception in thread "main" java.net.BindException: Address already in use (Bind failed)
at java.net.PlainSocketImpl.socketBind(Native Method)
at java.net.AbstractPlainSocketImpl.bind(AbstractPlainSocketImpl.java:387)
at java.net.ServerSocket.bind(ServerSocket.java:375)
at java.net.ServerSocket.<init>(ServerSocket.java:237)
at java.net.ServerSocket.<init>(ServerSocket.java:128)
at core.loginserver.AuthServer.checkFreePorts(AuthServer.java:63)
at core.loginserver.AuthServer.main(AuthServer.java:85)


Что то не так в ip?