posted 14 years ago
It looks like you need to get another book about Enterprise JavaBeans, to get a better understanding. Information from a variety of authors will help you. Going over the same material over and over typically is not helpful if you are unclear about a topic or what the author is saying in his/her material.
Potential problems with managing "state" in the application server combined with "how" an application attempts to use the application server and deployed EJBs is what you can learn more about.
Good luck!