So I'm using JBoss 5.1 CR1 and I've got a small bit of code that looks like this: Object ds = ctx.lookup("HRDS"); | log.error("The class type is: "+ds.getClass().getCanonicalName()); | DataSource hr = (DataSource)ctx.lookup("HRDS"); when the log statement is written, I see org.jboss.resource.adapter.jdbc.WrapperDataSource which is what I expect, so it can in fact find the datasource. However, when I try to cast it to javax.sql.DataSource Generic exception: ^%^ >>>stack of 1.cause::java.lang.ClassCastException: org.jboss.resource.adapter.jdbc.WrapperDataSource I thought wrapped data source extended DataSource? Also, my Hibernate connections can work with it fine. hmmm View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4231070#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...