After upgrading jgroups from 2.5.1 to 2.7.0GA, we encountered ClassNotFoundExceptions that we tracked down to class loader issues between swarmcache (our Hibernate 2^nd level cache provider) and jgroups. To make a long story short, we’re now attempting a cut over to jboss cache.

Some specifics…

JBoss AS 5.1.0.GA

hibernate-jbosscache2-3.3.1.GA

jbosscache-core 3.2.5GA

With that said, here’s my hibernate configuration in which we ran into DataVersioningExceptions with queries…

{code:xml}

      <property name="hibernate.cache.use_second_level_cache" value="true" />

      <property name="hibernate.cache.use_query_cache" value="true" />

      <property name="hibernate.cache.region.jbc2.query.localonly" value="true" />

      <property name="hibernate.cache.region.factory_class" value="org.hibernate.cache.jbc2.MultiplexedJBossCacheRegionFactory" />

      <property name="hibernate.cache.region_prefix" value="hibernate.firstbest" />

{code}

Is optimistic-entity an inappropriate configuration for a Hibernate 2^nd level cache configuration? Assuming so, how do we deal with the DataVersioningExceptions? Is mvcc-entity a more appropriate configuration?

Sincerely, Tom