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.
If an ejb makes a synchronous request to external system (using web service or CORBA), then I think the ejb instance waits until it receives the response from the external system. Is there any way to timeout this synchronous call?