For 1.4, I have changed the create table DDL statements for mysql so they specify the engine as innodb, this means it will barf on a database setup to use MyISAM tables. You can change this in your mysql-persistence-manager.xml or clustered-mysql-persistence-manager.xml file. Just add ENGINE = INNODB at the end of all the CREATE TABLE statements. If you still get the problem then you know it's not this. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4061053#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...