WARN org.hibernate.engine.StatefulPersistenceContext.ProxyWarnLog - Narrowing proxy to class org.jbpm.graph.node.TaskNode - this operation breaks ==
If you have warning messages turned on for your server, in your console you may see some variant of the following message output several times when jBPM is called:
WARN [org.hibernate.engine.StatefulPersistenceContext] Narrowing proxy to class org.jbpm.graph.node.TaskNode - this operation breaks ==
According to the following post on the JBoss forums (from Koen Aers, one of the key contributors to the jBPM project), this is not an error and is not of significance. He explains the reason this warning is thrown: http://www.jboss.com/?module=bb&op=viewtopic&t=73123