Linux: loopback address

I run a java application under Linux environment and it throw an exception.

"Server failed to start: java.rmi.RemoteException: Cannot start. localhost.localdomain is a loopback address"

The problem seems related to the host file (\etc\hosts) and its content is shown below:

127.0.0.1 localhost.localdomain localhost

::1 localhost

After the configuration, everything works fine.