This error means that your MySQL server does not have a database called "jboss". You will have to.create that database (using MySQL tools), and probably create the user and password that will be used for that database. Here are the mysql statements I usually use to do this: CREATE DATABASE dddd; GRANT ALL PRIVILEGES ON xxx.* TO 'uuuu'@'localhost' IDENTIFIED BY 'pppp' WITH GRANT OPTION; where dddd is the database name (jboss in your case), uuuu is the user name and pppp is the password. These values must match the values used in the *-ds.xml file that defines the datasource. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4164275#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...