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IllegalStateException Using StatefulKnowledgeSession
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created by <a href="https://community.jboss.org/people/irs">irshad mansuri</a> in <i>jBPM Development</i> - <a href="https://community.jboss.org/message/803811#803811">View the full discussion</a>
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<div class="jive-rendered-content"><p>Hi i have created a workflow using humantask with database. But when i am deploying the process i am getting this error "<strong>java.lang.IllegalStateException: java.lang.reflect.InvocationTargetException".</strong></p><p>I debugged the java code and found the its not able to create "<strong>StatefulKnowledgeSession".  </strong>This is the code which i am implementing.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><strong><br/></strong></p><p>@Test</p><p>     public void processInstancePersistentTest() throws Exception{</p><p>        </p><p>        KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();</p><p>        kbuilder.add(new ClassPathResource("HumanWorkflow.bpmn"), ResourceType.BPMN2);</p><p>                     </p><p>        System.out.println("=== Knowledge Base Called ====");</p><p>        </p><p>        KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();</p><p>        kbase.addKnowledgePackages(kbuilder.getKnowledgePackages());</p><p>      </p><p>        Environment env = EnvironmentFactory.newEnvironment();</p><p>        EntityManagerFactory emf = Persistence.createEntityManagerFactory("org.jbpm.task");        </p><p>        env.set(EnvironmentName.ENTITY_MANAGER_FACTORY, emf);        </p><p>        env.set(EnvironmentName.TRANSACTION_MANAGER, TransactionManagerServices.getTransactionManager());</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>        System.out.println("=== Stateful Knowledge Session Called ====");</p><p>      </p><p>        final StatefulKnowledgeSession ksession = JPAKnowledgeService.newStatefulKnowledgeSession(kbase, null, env);</p><p>        int sessionId = ksession.getId();</p><p>      </p><p>        assertNotNull(sessionId);</p><p>        assertTrue(sessionId != 0);</p><p>        </p><p>        System.out.println("=== Human Task Handler Called ====");</p><p>        @SuppressWarnings("deprecation")</p><p>        CommandBasedWSHumanTaskHandler taskHandler = new CommandBasedWSHumanTaskHandler(ksession);</p><p>        ksession.getWorkItemManager().registerWorkItemHandler("Human Task",    taskHandler);</p><p>        </p><p>        </p><p>         ProcessInstance processInstance = ksession.createProcessInstance("com.sample.hello", null);</p><p>         System.out.println(">>> Let's Start the Process Instance");</p><p>         long processInstanceOne = processInstance.getId();</p><p>         ksession.startProcessInstance(processInstanceOne);</p><p>         ksession.dispose();</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>    }   </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>and this is the error which i am getting on debugging the code.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>    java.lang.IllegalStateException: java.lang.reflect.InvocationTargetException</p><p>    at org.drools.persistence.jpa.KnowledgeStoreServiceImpl.buildCommandService(KnowledgeStoreServiceImpl.java:142)</p><p>    at org.drools.persistence.jpa.KnowledgeStoreServiceImpl.newStatefulKnowledgeSession(KnowledgeStoreServiceImpl.java:66)</p><p>    at org.drools.persistence.jpa.JPAKnowledgeService.newStatefulKnowledgeSession(JPAKnowledgeService.java:122)</p><p>    at com.sample.HelloProcesTest.processInstancePersistentTest(HelloProcesTest.java:58)</p><p>    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)</p><p>    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)</p><p>    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)</p><p>    at java.lang.reflect.Method.invoke(Unknown Source)</p><p>    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)</p><p>    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)</p><p>    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)</p><p>    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)</p><p>    at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)</p><p>    at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:31)</p><p>    at org.jbpm.test.KnowledgeSessionCleanup$1.evaluate(KnowledgeSessionCleanup.java:28)</p><p>    at org.junit.rules.TestWatchman$1.evaluate(TestWatchman.java:48)</p><p>    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:76)</p><p>    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)</p><p>    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)</p><p>    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)</p><p>    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)</p><p>    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)</p><p>    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)</p><p>    at org.junit.runners.ParentRunner.run(ParentRunner.java:236)</p><p>    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:49)</p><p>    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)</p><p>    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)</p><p>    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)</p><p>    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)</p><p>    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)</p><p>Caused by: java.lang.reflect.InvocationTargetException</p><p>    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)</p><p>    at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)</p><p>    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)</p><p>    at java.lang.reflect.Constructor.newInstance(Unknown Source)</p><p>    at org.drools.persistence.jpa.KnowledgeStoreServiceImpl.buildCommandService(KnowledgeStoreServiceImpl.java:128)</p><p>    ... 29 more</p><p>Caused by: java.lang.NullPointerException</p><p>    at org.drools.persistence.SingleSessionCommandService.<init>(SingleSessionCommandService.java:168)</p><p>    ... 34 more</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Let me know if i am missing out something.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Thanks</p></div>
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