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.
Please provide the full stack trace.
Your current stack trace does not tell us what kind of exception, it just tells us how it was propogated.
Your stack trace, typically will have the exception type as its first line.