Tho code to retrieve the window properties does not need an active UserTransaction but the code to write them does. Your options: 1. You can configure in jboss-portlet that your portlet need a transaction and then JBP will always wrap your portlet code in a transaction. 2. Lookup and begin a UserTransaction on your own exactly when you need it the second is preferable. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4149997#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...