Dirk Mallon [http://community.jboss.org/people/blakkorange] created the discussion "help upgrading from 1.2.1 to 3.2.5 needed" To view the discussion, visit: http://community.jboss.org/message/545255#545255 -------------------------------------------------------------- Hallo ! Got some Problems with upgrading our Caching.We want to use Hibernate 3.5.2 and JBossCache 3.2.5. We got two Tomcats on different machines. Everyone has cache and they syncronize via JGroups/udp. It is my task to upgrade now. At Start i see that hibernate(withc3p0) starts and cache seems to start too because I see this line on console and its similar to the former version: GMS: address is 168.21.1.120:62174 (cluster=JBossCache-cluster) In the following trace a CommandAwareRpcDispatcher had an error 6040 [main] INFO org.hibernate.impl.SessionFactoryObjectFactory - Not binding factory to JNDI, no JNDI name configured 6040 [main] INFO org.hibernate.cache.UpdateTimestampsCache - starting update timestamps cache at region: org.hibernate.cache.UpdateTimestampsCache 6041 [main] INFO org.hibernate.cache.StandardQueryCache - starting query cache at region: org.hibernate.cache.StandardQueryCache 2010-05-28 09:49:26,225 (main                      CommandAwareRpcDispatcher.java:387 ) ERROR java.lang.NullPointerException but Hibernate can get  a List of entities from the Database. In my next lines, I instanciate a new entity start saving via Hibernate. But now it crashes with this: 2010-05-28 09:49:26,397 (main                      CommandAwareRpcDispatcher.java:387 ) ERROR java.lang.NullPointerException 6510 [main] ERROR org.hibernate.event.def.AbstractFlushingEventListener - Could not synchronize database state with session org.hibernate.cache.CacheException: org.hibernate.cache.CacheException: java.lang.RuntimeException: Failure to marshal argument(s) Can anyone give me a hint, where to look to solve the problem? thx Dirk -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/545255#545255] Start a new discussion in JBoss Cache at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&...]