Hy, I'm posing here, because it matches my Topic. I'm currently trying to switch from JBP 2.6.6 to 2.7.2. I compared the two versions and moved the changes i made (like adding Themes) to the new XML Files. After deployment, i get several ClassNotFound Exceptions, i can't understand. No ClassLoaders found for: org.jboss.hibernate.jbc.cacheprovider.OptimisticJBCCache$NonLockingDataVersion No ClassLoaders found for: org.apache.jackrabbit.core.query.HTMLTextFilter I searched in the JARs provided with 2.7.2 and found the "missing" org.jboss.hibernate.jbc.. Cache in the hibernate-jbc-cacheprovider.jar File. I don't understand why it is not loaded. I am using JBoss 4.2.1.GA and the HA Version of JBP 2.6.6 / JBP 2.7.2. Thanks so far Regards Soon5 View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4236274#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...