This week's book giveaway is in the OCPJP forum. We're giving away four copies of OCA/OCP Java SE 7 Programmer I & II Study Guide and have Kathy Sierra & Bert Bates on-line! See this thread for details.
Please check that all connectivities are open. If Jboss tries to connect to sources e.g. db and it is not able to then this kind of issues are seen. However Jobss after a certain time throws error with the actual cause.