@ApplicationScoped
@Stateful
public class Foo {

...

}

According to the EJB spec (4.6.2) the instance of Foo will be removed if a method invocation on Foo throws a runtime exception that is not an application exception. CDI should clarify if in that case a new instance of Foo replaces the old instance or whether the clients will keep receiving NoSuchEJBException for the rest of the application lifetime.