The JBM user guide is very explicit that should not use HSQL. There are also wiki pages on this. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4217345#4217345 Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=4217345