Thanks for the post. Before I react on the issue, may I point to: http://catb.org/~esr/faqs/smart-questions.html#volume http://catb.org/~esr/faqs/smart-questions.html#formats http://catb.org/~esr/faqs/smart-questions.html#beprecise jBPM is never tested with JPA (even though in your example Hibernate is the jpa provider), it uses Hibernate directly, so any issue you find is basically your problem (not meant negatively). And if you would have analysed the the logging a little (really, just a little) you would have seen 250 [JbpmJobExecutor:141.29.39.58:1] ERROR org.jbpm.db.JobSession - org.hibernate.MappingException : Named query not known: JobSe ssion.getFirstAcquirableJob So clearly the cause of the error you post is caused by another error. Why this named query cannot be found is up to you, since in jBPM with just hibernate it works. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4255405#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...