By default yes. The data is only stored in memory. So all your bookings get lost. The hotels are only still there cause they are created upon starting the server. There's a file called import.sql that contains the hotels ;). But there is a possibility to save the data on the disk instead. I'm not sure how this works exactly (I'm too lazy to search for that in the docs right now *g*). This is even quite interesting for Java SE. You can easily create standalone desktop applications with a built-in database by using Hibernate and HSQLDB... or let's say I hope this is possible ;). View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3972522#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...