This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
The @PersistenceContext injection is only supported in managed objects (EJBs, servlets etc...). Where are you injecting this PersistenceContext? In JBoss-4.2.x the injection of PersistenceContext is probably not supported in web tier too (because 4.2.x is a J2EE1.4 server with EJB3 patch).
If yes - than how do I make use of a container managed Entity Manager minus the injection ?