Hi gaohiward, I can see the issue every time when I shutdown server. if we change database to mysql or oracle, there are not this exception, when we do cluster, we don't utilize HSQLDB. Now my work evironment is standalone mode. we want to know if the JBM can't support the HSQLDB or It is a bug of HSQLDB? Can we skip the exception? thx . View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4217684#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...