This week's book giveaway is in the OCAJP forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide 1Z0-808 and have Jeanne Boyarsky & Scott Selikoff on-line! See this thread for details.
The destroy-method="close" is needed when you are using apache commons DBCP's BasicDataSource or C3P0's ComboPooledDataSource to shutdown the data source immediately when the spring application shuts down. This is not needed in the DriverManagerDataSource. This class doesn't even have any form of destroy method. Spring manages that for you. Just remove the destroy-method attribute from your bean definition.