Thanks for the response, to configure Hibernate to use OptmisticTreeCacheProvider do I just switch | <property name="hibernate.cache.provider_class" value="org.jboss.ejb3.entity.TreeCacheProviderHook"/> | with | <property name="hibernate.cache.provider_class" value="org.hibernate.cache.OptimisticTreeCacheProvider"/> | in the persistance.xml? for the record, my full persistance.xml atm is | <persistence> | <persistence-unit name="bligooEM"> | <jta-data-source>java:/Bligoo_MySqlDS</jta-data-source> | <properties> | <property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect" /> | <property name="hibernate.cache.provider_class" value="org.jboss.ejb3.entity.TreeCacheProviderHook"/> | <property name="hibernate.treecache.mbean.object_name" value="jboss.cache:service=EJB3EntityTreeCache"/> | <property name="hibernate.hbm2ddl.auto" value="update"/> | <property name="hibernate.show_sql" value="false" /> | </properties> | </persistence-unit> | </persistence> | View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4010900#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...