I ran into this problem too. I was unable to get the plain treecache to work with 1.4.2_10, though it is supposed to be supported in jbosscache 1.4. After days of banging my head, I installed jdk 1.5.0_08 and it worked. Maybe there was something else wrong but I couldn't find it. Hopefully this is the reason for the success and that it might help someone else in the same boat. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3970237#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...