Thanks for the quick answer. This is the full stack trace I get (except the line referring to the calling code). I should have mentioned that the code is called from a remote client and that the metadata.getColumns() function works fine inside a session bean. The driver is the one provided by Oracle : Oracle JDBC driver 10.2.0.1.0 Regards, View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4175655#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...