I have only hibernate tools installed. It could be possible that I had a few editor windows (tabs) open with XML files. but the "second" before the hang up of eclipse I wasn't on this editor tab. so the answer would be, I had open XML editor tabs but i was not editing them. i don't think so. I'm currently using Apache Derby 10.1 "Nature" as a project in eclipse (starting & stopping the server from inside eclipse) - for testing purposes - and using "org.apache.derby.jdbc.ClientDriver" driver. since the DB is on the same box the connectivity shouldn't be a problem. thanks for your feedback. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3969252#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...