Mariusz Cwikla [https://community.jboss.org/people/mariuszcwikla] created the discussion "OSGi: Caused by: java.lang.ClassNotFoundException: org.drools.persistence.jpa.KnowledgeStoreServiceImpl" To view the discussion, visit: https://community.jboss.org/message/780506#780506 -------------------------------------------------------------- Hello, I'm trying to run JBPM 5.4 inside an OSGi container. I've encountered a problem when using JPAKnowledgeService.newStatefulKnowledgeSession. I get following error: java.lang.RuntimeException: Provider org.drools.persistence.jpa.KnowledgeStoreServiceImpl could not be set.           at org.drools.persistence.jpa.JPAKnowledgeService.loadProvider(JPAKnowledgeService.java:155)           at org.drools.persistence.jpa.JPAKnowledgeService.getJPAKnowledgeServiceProvider(JPAKnowledgeService.java:143)           at org.drools.persistence.jpa.JPAKnowledgeService.newStatefulKnowledgeSession(JPAKnowledgeService.java:122)           .... Caused by: java.lang.ClassNotFoundException: org.drools.persistence.jpa.KnowledgeStoreServiceImpl I found out that JPAKnowledgeService uses reflection to instantiate KnowledgeStoreServiceImpl class. Both classes are in org.drools.persistence.jpa package, but one is knowledge-api-5.5.0.Final.jar and second is in drools-persistence-jpa-5.5.0.Final.jar. I'm not an OSGi expert, but I think that both classes should be in one .jar file (currently it's "split packages" problem). Currently I have a workaround to use KnowledgetStoreServiceImpl directly and not use JPAKnowledgeService. Or is there another workaround? -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/780506#780506] Start a new discussion in jBPM at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&...]