title: unable to connect to datasource because of sql exception- ATG app
body: <p>I am trying to deploy an <strong>ATG application</strong> in the weblogic Admin server for development. But it says the following error:
  "unable to connect to datasource because of sql exception: Internal error: Cannot obtain XAConnection weblogic.common.resourceException: ORA-12519, TNS:no appropriate service handler found" 
  [ screenshot]: <strong><em><a href="http://i.imgur.com/I2n5tDW.jpg" rel="nofollow">http://i.imgur.com/I2n5tDW.jpg</a></em></strong>  I'm new to these ATG and weblogic technologies. So please guide me to the solution.</p>