Hi all! I need to configure my system to save the state of a StatefulKnowledgeSession. I'm using tomcat 6, BTM 1.3.2, Hibernate 3.4 and Postgres 8.3. I have configured my Tomcat 6 and my jee aplication as it is described in this post http://docs.codehaus.org/display/BTM/Tomcat13 So I have published a DataSource called testDS1. My persitence.xml file has the next configuration: --------------------------------------------------------------------------------------------- <?xml version="1.0" encoding="UTF-8" standalone="yes"?> <persistence version="1.0" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd http://java.sun.com/xml/ns/persistence/orm http://java.sun.com/xml/ns/persistence/orm_1_0.xsd" xmlns:orm="http://java.sun.com/xml/ns/persistence/orm" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/persistence"> <persistence-unit name="com.logister.brms.jpa" transaction-type="JTA"> <provider>org.hibernate.ejb.HibernatePersistence</provider> <jta-data-source>java:comp/env/jdbc/testDS1</jta-data-source> <class>org.drools.persistence.session.SessionInfo</class> <properties> <property name="hibernate.dialect" value="org.hibernate.dialect.PostgreSQLDialect" /> <property name="hibernate.hbm2ddl.auto" value="create-drop" /> <property name="hibernate.max_fetch_depth" value="3" /> <property name="hibernate.show_sql" value="true" /> <property name="hibernate.transaction.factory_class" value="org.hibernate.transaction.JTATransactionFactory" /> <property name="hibernate.transaction.manager_lookup_class" value="org.hibernate.transaction.BTMTransactionManagerLookup" /> </properties> </persistence-unit> </persistence> --------------------------------------------------------------------------------------------- And my code for creating the StatefulKnowledgeSession is the next below: (The same is shown in the Chapter 5 persitence in the web http://hudson.jboss.org/hudson/job/drools/lastSuccessfulBuild/artifact/tr... ). --------------------------------------------------------------------------------------------- KnowledgeBase kbase = null; StatefulKnowledgeSession ksession = null; kbase = util.readKnowledgeBase(); // This method reads all the rf (flow) files. EntityManagerFactory emf = Persistence.createEntityManagerFactory("com.logister.brms.jpa"); Environment env = KnowledgeBaseFactory.newEnvironment(); env.set(EnvironmentName.ENTITY_MANAGER_FACTORY, emf); ksession = JPAKnowledgeService.newStatefulKnowledgeSession(kbase, null, env); int sessionId = ksession.getId(); --------------------------------------------------------------------------------------------- My problem is that I get the next Error, but the table sessioninfo is automatically created. javax.persistence.PersistenceException: [PersistenceUnit: com.logister.brms.jpa] Unable to build EntityManagerFactory at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Con figuration.java:677) at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(Hib ernatePersistence.java:126) at javax.persistence.Persistence.createEntityManagerFactory(Persistence. java:52) at javax.persistence.Persistence.createEntityManagerFactory(Persistence. java:34) at com.logister.BRMS.BrmsServlet.doPost(BrmsServlet.java:124) at com.logister.BRMS.BrmsServlet.doGet(BrmsServlet.java:59) at javax.servlet.http.HttpServlet.service(HttpServlet.java:617) at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl icationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF ilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperV alve.java:233) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextV alve.java:191) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.j ava:128) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.j ava:102) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVal ve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.jav a:293) at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcesso r.java:859) at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.pr ocess(Http11AprProtocol.java:574) at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:15 27) at java.lang.Thread.run(Thread.java:595) Caused by: org.hibernate.HibernateException: Could not obtain BTM transaction ma nager instance at org.hibernate.transaction.BTMTransactionManagerLookup.getTransactionM anager(BTMTransactionManagerLookup.java:50) at org.hibernate.impl.SessionFactoryImpl.<init>(SessionFactoryImpl.java: 357) at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.jav a:1327) at org.hibernate.cfg.AnnotationConfiguration.buildSessionFactory(Annotat ionConfiguration.java:867) at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Con figuration.java:669) ... 19 more Caused by: java.lang.ClassCastException: bitronix.tm.BitronixTransactionManager at org.hibernate.transaction.BTMTransactionManagerLookup.getTransactionM anager(BTMTransactionManagerLookup.java:47) ... 23 more Any idea? I have looked for a solution and I have tried differents configurations in my persistence.xml file but in fact I have always received a java.lang.ClassCastException. Thanks in advance. -- View this message in context: http://drools-java-rules-engine.46999.n3.nabble.com/ClassCastException-BT... Sent from the Drools - Dev mailing list archive at Nabble.com.