Hi,

I am setting the UserTransaction to Environment.And passing it to JBPM to get the session. On execution of below line getting the error from drools(using drools 6.5.0-Final)

ksession = JPAKnowledgeService.loadStatefulKnowledgeSession(1, kbase, null, env);

drools internally using javax.transaction.TransactionManager and which is throwing incompatible error.

Kindly do needful.

Code Snippet:

1.   static StatefulKnowledgeSession ksession = null;
2.   KnowledgeBase kbase = null;
3. InitialContext ctx = new InitialContext();
4. UserTransaction tm = (UserTransaction) ctx.lookup("java:comp/UserTransaction");
5.   env = KnowledgeBaseFactory.newEnvironment();
6.   env.set( EnvironmentName.TRANSACTION_MANAGER, tm);
7.   env.set( EnvironmentName.ENTITY_MANAGER_FACTORY, emf);
8.   kbase = readKnowledgeBase();
9.   ksession = JPAKnowledgeService.loadStatefulKnowledgeSession(1, kbase, null, env);

Error Log:

emf::: org.hibernate.ejb.EntityManagerFactoryImpl@486dab07

env::: org.drools.impl.EnvironmentImpl@9843be15

User Transaction::org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader@1a816186

Code Location::file:/usr1/wasbase8.5.5/plugins/javax.j2ee.jta.jar

kbase::: org.drools.impl.KnowledgeBaseImpl@2a8875c8

sessId::: 6

java.lang.IllegalStateException: java.lang.reflect.InvocationTargetException

  at org.drools.persistence.jpa.KnowledgeStoreServiceImpl.buildCommandService(KnowledgeStoreServiceImpl.java:115)

  at org.drools.persistence.jpa.KnowledgeStoreServiceImpl.loadStatefulKnowledgeSession(KnowledgeStoreServiceImpl.java:83)

  at org.drools.persistence.jpa.JPAKnowledgeService.loadStatefulKnowledgeSession(JPAKnowledgeService.java:131)

Caused by: java.lang.reflect.InvocationTargetException

  at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

  at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:80)

  at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:57)

  at java.lang.reflect.Constructor.newInstance(Constructor.java:539)

  at org.drools.persistence.jpa.KnowledgeStoreServiceImpl.buildCommandService(KnowledgeStoreServiceImpl.java:100)

  ... 44 more

Caused by: java.lang.ClassCastException: com.ibm.ws.tx.jta.UserTransactionImpl incompatible with javax.transaction.TransactionManager

  at org.drools.persistence.jta.JtaTransactionManager.<init>(JtaTransactionManager.java:75)

  at org.drools.persistence.SingleSessionCommandService.initTransactionManager(SingleSessionCommandService.java:303)

  at org.drools.persistence.SingleSessionCommandService.<init>(SingleSessionCommandService.java:183)

  ... 49 more

Thanks

Zafar