You can generally speaking; however, that does not mean you still don't have more configuration to do. That is why you need to make sure your Http Service is properly set up and that the JSP page you are using the JSTL call for the datasource is infact running in the same instance as is the JDBC Resource. By default, allowLinking is set to true but you can turn that off. If you did not turn it off, then it could very well mean your not running the jsp in the right place... You can have more than one
I am confused. I thought if I set the data source on Server, I can use it without any other extra settings.