I don't think so, because the WebApplication is deployed on the cluster an tranferred at the two nodes.
All works fine when I start the cluster, only if I shut down and restart a node I have the problem.
This class is present in my WAR file on the two WAS nodes.
This trace is probably due to the fact that in this class I use JbossCache that is unable to be initialized...
A very important note is that if I use only one instance of cache (for example Layout) all works fine also when I shut down and restart a node!!!
Thanks