Hello, I have similar problem while listing processes in gwt-console - 'Could not initialize stateful knowledge session'. I tried to go through manual to set up drools flow with humantasks. I basicly went through https://hudson.jboss.org/hudson/job/drools/lastSuccessfulBuild/artifact/t... . But I get this exception (listing human tasks works well): org.jboss.resteasy.spi.UnhandledException: java.lang.RuntimeException: Could not initialize stateful knowledge session: java.lang.reflect.InvocationTargetException        at org.jboss.resteasy.core.SynchronousDispatcher.handleApplicationException(SynchronousDispatcher.java:319)        at org.jboss.resteasy.core.SynchronousDispatcher.handleException(SynchronousDispatcher.java:230)        at org.jboss.resteasy.core.SynchronousDispatcher.handleInvokerException(SynchronousDispatcher.java:206)        at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:360)        at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:173)        at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:93)        at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:68)        at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)        at org.jboss.bpm.console.server.util.GWTJsonFilter.doFilter(GWTJsonFilter.java:59)        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)        at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:235)        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)        at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:190)        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:525)        at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:92)        at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.process(SecurityContextEstablishmentValve.java:126)        at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.invoke(SecurityContextEstablishmentValve.java:70)        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)        at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:158)        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:330)        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:829)        at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:598)        at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)        at java.lang.Thread.run(Thread.java:619) Caused by: java.lang.RuntimeException: Could not initialize stateful knowledge session: java.lang.reflect.InvocationTargetException        at org.drools.integration.console.DroolsFlowCommandDelegate.newStatefulKnowledgeSession(DroolsFlowCommandDelegate.java:69)        at org.drools.integration.console.DroolsFlowCommandDelegate.getSession(DroolsFlowCommandDelegate.java:77)        at org.drools.integration.console.DroolsFlowCommandDelegate.<init>(DroolsFlowCommandDelegate.java:36)        at org.drools.integration.console.DroolsFlowProcessManagement.<init>(DroolsFlowProcessManagement.java:20)        at org.drools.integration.console.DroolsFlowManagementFactory.createProcessManagement(DroolsFlowManagementFactory.java:11)        at org.jboss.bpm.console.server.ProcessMgmtFacade.getProcessManagement(ProcessMgmtFacade.java:83)        at org.jboss.bpm.console.server.ProcessMgmtFacade.getDefinitionsJSON(ProcessMgmtFacade.java:107)        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)        at java.lang.reflect.Method.invoke(Method.java:597)        at org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:117)        at org.jboss.resteasy.core.ResourceMethod.invokeOnTarget(ResourceMethod.java:260)        at org.jboss.resteasy.core.ResourceMethod.invoke(ResourceMethod.java:232)        at org.jboss.resteasy.core.ResourceMethod.invoke(ResourceMethod.java:166)        at org.jboss.resteasy.core.DispatcherUtilities.getJaxrsResponse(DispatcherUtilities.java:142)        at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:356)        ... 28 more Caused by: java.lang.IllegalStateException: java.lang.reflect.InvocationTargetException        at org.drools.persistence.jpa.impl.JPAKnowledgeServiceProviderImpl.buildCommanService(JPAKnowledgeServiceProviderImpl.java:97)        at org.drools.persistence.jpa.impl.JPAKnowledgeServiceProviderImpl.loadStatefulKnowledgeSession(JPAKnowledgeServiceProviderImpl.java:72)        at org.drools.persistence.jpa.JPAKnowledgeService.loadStatefulKnowledgeSession(JPAKnowledgeService.java:102)        at org.drools.integration.console.DroolsFlowCommandDelegate.newStatefulKnowledgeSession(DroolsFlowCommandDelegate.java:51)        ... 44 more Caused by: java.lang.reflect.InvocationTargetException        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)        at java.lang.reflect.Constructor.newInstance(Constructor.java:513)        at org.drools.persistence.jpa.impl.JPAKnowledgeServiceProviderImpl.buildCommanService(JPAKnowledgeServiceProviderImpl.java:85)        ... 47 more Caused by: java.lang.RuntimeException: Could not find session data for id 1        at org.drools.persistence.session.SingleSessionCommandService.<init>(SingleSessionCommandService.java:191)        ... 52 more Detailed logs are in attachment. I compiled 'default' package containing example flow in guvernor, but this didn't help. I think that guvnor.war doesn't use testDS1 datasource, so I suppose it writes SessionInfo object somewhere else. Do you think I could reconfigure jackrabbit to use testDS1 datasource? Does that make sense? I used http://anonsvn.jboss.org/repos/labs/labs/jbossrules/trunk@30785 version from Sun Dec 20 18:50:08 2009. I deployed things on JBoss 5.1.0.GA. Do you have some ideas why this doesn't work? Regards, -- Rafał Rusin http://rrusin.blogspot.com http://www.touk.pl http://top.touk.pl