Reading https://glassfish.java.net/docs/4.0/upgrade-guide.pdf it seems that isn't possibile upgrade by pkg from 3.1.2.2 to 4.0
why?
In a production system is very hard to re-configurate the entire server with a new installation.
I'm searching a simple way to upgrade 3.1.2.2 to 4.0
Any tips?
thanks