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.
Then the connection will be stale and any operation using that connection will result in an exception. There are some properties that you can set on the datasource which can avoid such a situation. See this for details.