As I understand it the ejb takes care of threading for us? What I am trying to do is syncronize a method so that only one thread can be using it at a time. However, I get an error when I try to use syncronize. What I think is happening is the ejb is running multiple instances of this method at a time due to threading. But I want only one flow of control within this method. Sorry if this sounds confusing; I can clarify more... thanks.