Hi, I fixed this - I had a commons-logging-x.jar in my WEB-INF/lib. But after removing this, I get another error: WARN [TreeCache] node /JSESSION/localhost/genloop-demo/8gZM8DrZOd0IGqYY6C3Luw** not found I have two jboss-4.2.1.GA (./run.sh -c all -b ip_node1/ip_node2) running. After shutting down node1 and submitting a request, I get this error on node2. What does this "localhost" mean and how can I get a session-string that allows transparent failover? To add some information, I run a JSF-application with tomahawk and client-side saving (javax.faces.STATE_SAVING_METHOD - client). Thanks for any help to get this work. Carsten View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4069965#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...