Ok, even after the -Dsun.lang.ClassLoader.allowArraySyntax=true flag on the JAVA_OPTS, I got this exception. 15:57:27,073 ERROR [JBossCacheService] loadSession(): id: TLvxyxOX2p5VtvjkEuqjoQ** exception occurred during deserialization java.lang.ArrayStoreException: org.springframework.security.GrantedAuthorityImpl Terracotta worked great, and the implementation took no time. Why this has to be so complicated and undocumented! View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4173959#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...