I get the same trouble with a Liferay on Ubuntu server clouded by amazon free tier service, here follows:
Your application is not available
Your application may not be available for many reasons:
If you just launched the server, please wait a few minutes for the application to deploy. It is common behavior for Java applications.
Your application may not be working properly. Please check the application log file.
This page will automatically refresh every 15 seconds until the application is available.
any suggestions? where can I read the application log?
ram and CPU are barely full used, but I should not be out of liferay's requirements!