[rules-users] Human Task - ERROR : JPAKnowledgeService.newStatefulKnowledgeSession ...

[Mauricio Salatino]

You will need to solve that problem. looks like a configuration problem,
can you share the persistence.xml file? did you configure persistence with
JTA?
Cheers

2011/11/9 S.M.H.Jamali <cpps98 at yahoo.com>

> Hello all,
>
> I get an exception while last line of below method executed :
>
>     public StatefulKnowledgeSession createSession() throws Exception {
>
>         /*
>          * Create the knowledgebase using the required bpmn and drl files
>          */
>         KnowledgeBase kbase = readKnowledgeBase("HumanTask.bpmn");
>         EntityManagerFactory emf = Persistence.createEntityManagerFactory(
> "org.jbpm.persistence.jpa" );
>         Environment env = KnowledgeBaseFactory.newEnvironment();
>         env.set( EnvironmentName.ENTITY_MANAGER_FACTORY, emf );
>         env.set( EnvironmentName.TRANSACTION_MANAGER,
> TransactionManagerServices.getTransactionManager() );
>         env.set( EnvironmentName.GLOBALS, new MapGlobalResolver() );
>
>         Properties properties = new Properties();
>         properties.put("drools.processInstanceManagerFactory",
> "org.jbpm.persistence.processinstance.JPAProcessInstanceManagerFactory");
>         properties.put("drools.processSignalManagerFactory",
> "org.jbpm.persistence.processinstance.JPASignalManagerFactory");
>         KnowledgeSessionConfiguration config =
> KnowledgeBaseFactory.newKnowledgeSessionConfiguration(properties);
>
>         return JPAKnowledgeService.newStatefulKnowledgeSession(kbase,
> config, env);
>
>     }
>
> its stack-trace is :
>
> 14:26:13,111 WARN  [JtaTransactionManager] Participating in existing JTA
> transaction, but no JTA TransactionManager or
> TransactionSychronizationRegistry available:
> java.lang.NullPointerException
>     at
> org.drools.persistence.jta.JtaTransactionManager.registerTransactionSynchronization(JtaTransactionManager.java:221)
>     at
> org.drools.persistence.SingleSessionCommandService.registerRollbackSync(SingleSessionCommandService.java:333)
>     at
> org.drools.persistence.SingleSessionCommandService.<init>(SingleSessionCommandService.java:123)
>     at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
> Method)...
>
> Can anyone help me to solve this problem ?
> Thanks in advance
> S.M.H.Jamali
>
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>


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