Just poking in, since this thread was brought up in the AS5 forum too. "michaelfgh" wrote : But if MySQL and Oracle don't have this problem, so if the JBM just have a little incompatible with HSQL? | As suggested by the JBossMessaging team, do not use HSQL DB. As you have already read the JIRA and the wiki pages, HSQL DB is not reliable. You also noted that using MySQL fixes these error messages, so why not use MySQL? More specifically, is there any specific reason why you want to stick to HSQL? :) View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4217741#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...