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Re: Null cmdScopedEntityManager during stateful session load
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created by <a href="https://community.jboss.org/people/biraneto">Bira Neto</a> in <i>jBPM</i> - <a href="https://community.jboss.org/message/745095#745095">View the full discussion</a>
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<div class="jive-rendered-content"><p>I'm using jbpm 5.3 on tomcat with spring and Bitronix. Postgres DB.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>My environment is being created like this:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>  EntityManagerFactory emf = Persistence.createEntityManagerFactory("com.framework.jpa");</p><p>                    Environment env = KnowledgeBaseFactory.newEnvironment();</p><p>  </p><p>                    env.set(EnvironmentName.ENTITY_MANAGER_FACTORY, emf);</p><p>                    env.set(EnvironmentName.TRANSACTION_MANAGER, TransactionManagerServices.getTransactionManager());</p><p>                    env.set(EnvironmentName.TRANSACTION, ut);</p><p>  </p><p>                    return env;</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>The process definition is not big... there is a lot of calls from my framework which I must say call no Jbpm methods. The important part is the two conditionalEvents that lead to one line of execution reach the end event and the other being blocked. When restarting the server the deserialization fails.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><?xml version="1.0" encoding="UTF-8"?> </p><p><definitions id="Definition" </p><p><span>targetNamespace="</span><a class="jive-link-external-small" href="http://jbpm.org/example/bpmn2" target="_blank">http://jbpm.org/example/bpmn2</a><span>" </span></p><p><span>typeLanguage="</span><a class="jive-link-external-small" href="http://www.java.com/javaTypes" target="_blank">http://www.java.com/javaTypes</a><span>" </span></p><p><span>xmlns:java="</span><a class="jive-link-external-small" href="http://drools.org/semantics/java" target="_blank">http://drools.org/semantics/java</a><span>" </span></p><p><span>expressionLanguage="</span><a class="jive-link-external-small" href="http://www.mvel.org/2.0" target="_blank">http://www.mvel.org/2.0</a><span>" </span></p><p><span>xmlns:xsi="</span><a class="jive-link-external-small" href="http://www.w3.org/2001/XMLSchema-instance" target="_blank">http://www.w3.org/2001/XMLSchema-instance</a><span>" </span></p><p><span>xsi:schemaLocation="</span><a class="jive-link-external-small" href="http://www.omg.org/spec/BPMN/20100524/MODEL" target="_blank">http://www.omg.org/spec/BPMN/20100524/MODEL</a><span> BPMN20.xsd" </span></p><p><span>xmlns="</span><a class="jive-link-external-small" href="http://www.omg.org/spec/BPMN/20100524/MODEL" target="_blank">http://www.omg.org/spec/BPMN/20100524/MODEL</a><span>" </span></p><p><span>xmlns:bpmndi="</span><a class="jive-link-external-small" href="http://www.omg.org/spec/BPMN/20100524/DI" target="_blank">http://www.omg.org/spec/BPMN/20100524/DI</a><span>" </span></p><p><span>xmlns:dc="</span><a class="jive-link-external-small" href="http://www.omg.org/spec/DD/20100524/DC" target="_blank">http://www.omg.org/spec/DD/20100524/DC</a><span>" </span></p><p><span>xmlns:di="</span><a class="jive-link-external-small" href="http://www.omg.org/spec/DD/20100524/DI" target="_blank">http://www.omg.org/spec/DD/20100524/DI</a><span>" </span></p><p><span>xmlns:tns="</span><a class="jive-link-external-small" href="http://www.jboss.org/drools" target="_blank">http://www.jboss.org/drools</a><span>"> </span></p><p> <itemDefinition id="CTX_PROCESS_IDItem" structureRef="java.lang.Long" /></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p> <process processType="Private" isExecutable="true" </p><p> id="conditionalTest_2_0"  tns:packageName="defaultPackage" name="conditionalTest_2.0" ></p><p><extensionElements></p><p><tns:import name="com.entities.*" /></p><p><tns:import name="com.core.services.ServicePkAspect" /></p><p></extensionElements></p><p><property id="CTX_PROCESS_ID" itemSubjectRef="tns:CTX_PROCESS_IDItem"/></p><p><endEvent id="id_3" name="id_3" ><incoming>id_17</incoming></p><p> </endEvent></p><p><scriptTask id="id_7" name="id_7" ><incoming>id_10</incoming></p><p><outgoing>id_16</outgoing></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><script>ServicePkAspect.processAroundExecute("workflowServicePk", "executeRule", null, new String[]{"testRuleParam","testRuleParam","132710"}, CTX_PROCESS_ID);</script></p><p></scriptTask></p><p><exclusiveGateway id="id_6" name="id_6"  gatewayDirection="Converging"><incoming>id_12</incoming></p><p><incoming>id_11</incoming></p><p><outgoing>id_17</outgoing></p><p></exclusiveGateway></p><p><scriptTask id="id_2" name="id_2" ><incoming>id_13</incoming></p><p><outgoing>id_10</outgoing></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><script> ServicePkAspect.processAroundExecute("workflowServicePk", "executePrepareTestRule", null, null, CTX_PROCESS_ID); return true; </script></p><p></scriptTask></p><p><startEvent id="id_4" name="id_4"><outgoing>id_13</outgoing></p><p> </startEvent></p><p><parallelGateway id="id_8" name="id_8" gatewayDirection="Diverging"><incoming>id_16</incoming></p><p><outgoing>id_14</outgoing></p><p><outgoing>id_15</outgoing></p><p></parallelGateway></p><p><intermediateCatchEvent id="id_5" name="id_5"></p><p>  </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p> <incoming>id_15</incoming></p><p><outgoing>id_12</outgoing></p><p> <conditionalEventDefinition> </p><p><condition xsi:type="tFormalExpression" > UserPk(idUser &gt; 150)</p><p> </condition> </p><p></conditionalEventDefinition></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p> </intermediateCatchEvent></p><p><intermediateCatchEvent id="id_9" name="id_9"></p><p>  </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p> <incoming>id_14</incoming></p><p><outgoing>id_11</outgoing></p><p> <conditionalEventDefinition> </p><p><condition xsi:type="tFormalExpression" > UserPk(idUser &lt;= 150)</p><p> </condition> </p><p></conditionalEventDefinition></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p> </intermediateCatchEvent></p><p><sequenceFlow id="id_14" name="id_14" sourceRef="id_8" targetRef="id_9" > </sequenceFlow></p><p><sequenceFlow id="id_11" name="id_11" sourceRef="id_9" targetRef="id_6" > </sequenceFlow></p><p><sequenceFlow id="id_13" name="id_13" sourceRef="id_4" targetRef="id_2" > </sequenceFlow></p><p><sequenceFlow id="id_16" name="id_16" sourceRef="id_7" targetRef="id_8" > </sequenceFlow></p><p><sequenceFlow id="id_17" name="id_17" sourceRef="id_6" targetRef="id_3" ></p><p><conditionExpression xsi:type="tFormalExpression"></p><p> return true; </p><p></conditionExpression> </sequenceFlow></p><p><sequenceFlow id="id_12" name="id_12" sourceRef="id_5" targetRef="id_6" > </sequenceFlow></p><p><sequenceFlow id="id_15" name="id_15" sourceRef="id_8" targetRef="id_5" > </sequenceFlow></p><p><sequenceFlow id="id_10" name="id_10" sourceRef="id_2" targetRef="id_7" > </sequenceFlow></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p></process> </p><p></definitions></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>When restarting the server with </p><p>    ksession = JPAKnowledgeService.loadStatefulKnowledgeSession(sessionId, kbase, null, env );</p><p>I get the exception below caused by a null pointer exception as already mentioned on the first post. Maybe it is worth to mention that the var appScopedEntityManager is initialized.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>java.lang.RuntimeException: Unable to load session snapshot</p><p>          at org.drools.persistence.SessionMarshallingHelper.loadSnapshot(SessionMarshallingHelper.java:96)</p><p>          at org.drools.persistence.SingleSessionCommandService.initKsession(SingleSessionCommandService.java:253)</p><p>          at org.drools.persistence.SingleSessionCommandService.<init>(SingleSessionCommandService.java:195)</p><p>          at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)</p><p>          at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)</p><p>          at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)</p><p>          at java.lang.reflect.Constructor.newInstance(Constructor.java:513)</p><p>          at org.drools.persistence.jpa.KnowledgeStoreServiceImpl.buildCommandService(KnowledgeStoreServiceImpl.java:101)</p><p>          at org.drools.persistence.jpa.KnowledgeStoreServiceImpl.loadStatefulKnowledgeSession(KnowledgeStoreServiceImpl.java:84)</p><p>          at org.drools.persistence.jpa.JPAKnowledgeService.loadStatefulKnowledgeSession(JPAKnowledgeService.java:131)</p><p>          at com.perkons.frameworkpk.fpk.core.workflows.WorkflowManagerPk.loadStatefulSession(WorkflowManagerPk.java:403)</p><p>          at com.perkons.frameworkpk.fpk.core.workflows.WorkflowManagerPk.initialize(WorkflowManagerPk.java:120)</p><p>          at com.perkons.frameworkpk.fpk.core.ContextLoaderListenerPk.contextInitialized(ContextLoaderListenerPk.java:92)</p><p>          at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4205)</p><p>          at org.apache.catalina.core.StandardContext.start(StandardContext.java:4704)</p><p>          at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:799)</p><p>          at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:779)</p><p>          at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:601)</p><p>          at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:675)</p><p>          at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:601)</p><p>          at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:502)</p><p>          at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1315)</p><p>          at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:324)</p><p>          at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:142)</p><p>          at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1061)</p><p>          at org.apache.catalina.core.StandardHost.start(StandardHost.java:840)</p><p>          at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)</p><p>          at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:463)</p><p>          at org.apache.catalina.core.StandardService.start(StandardService.java:525)</p><p>          at org.apache.catalina.core.StandardServer.start(StandardServer.java:754)</p><p>          at org.apache.catalina.startup.Catalina.start(Catalina.java:595)</p><p>          at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)</p><p>          at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)</p><p>          at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)</p><p>          at java.lang.reflect.Method.invoke(Method.java:597)</p><p>          at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)</p><p>          at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)</p><p>Caused by: java.lang.NullPointerException</p><p>          at org.jbpm.persistence.JpaProcessPersistenceContext.getProcessInstancesWaitingForEvent(JpaProcessPersistenceContext.java:35)</p><p>          at org.jbpm.persistence.processinstance.JPASignalManager.getProcessInstancesForEvent(JPASignalManager.java:40)</p><p>          at org.jbpm.persistence.processinstance.JPASignalManager.signalEvent(JPASignalManager.java:23)</p><p>          at org.jbpm.process.instance.ProcessRuntimeImpl$2.activationCreated(ProcessRuntimeImpl.java:340)</p><p>          at org.drools.impl.StatefulKnowledgeSessionImpl$AgendaEventListenerWrapper.activationCreated(StatefulKnowledgeSessionImpl.java:643)</p><p>          at org.drools.event.AgendaEventSupport.fireActivationCreated(AgendaEventSupport.java:41)</p><p>          at org.drools.common.DefaultAgenda.createActivation(DefaultAgenda.java:601)</p><p>          at org.drools.reteoo.RuleTerminalNode.assertLeftTuple(RuleTerminalNode.java:257)</p><p>          at org.drools.reteoo.SingleLeftTupleSinkAdapter.doPropagateAssertLeftTuple(SingleLeftTupleSinkAdapter.java:196)</p><p>          at org.drools.reteoo.SingleLeftTupleSinkAdapter.createAndPropagateAssertLeftTuple(SingleLeftTupleSinkAdapter.java:145)</p><p>          at org.drools.reteoo.LeftInputAdapterNode.assertObject(LeftInputAdapterNode.java:154)</p><p>          at org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:59)</p><p>          at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:141)</p><p>          at org.drools.reteoo.CompositeObjectSinkAdapter.doPropagateAssertObject(CompositeObjectSinkAdapter.java:497)</p><p>          at org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:382)</p><p>          at org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:235)</p><p>          at org.drools.reteoo.EntryPointNode.assertObject(EntryPointNode.java:240)</p><p>          at org.drools.marshalling.impl.ProtobufInputMarshaller.assertHandleIntoOTN(ProtobufInputMarshaller.java:483)</p><p>          at org.drools.marshalling.impl.ProtobufInputMarshaller.readFactHandles(ProtobufInputMarshaller.java:459)</p><p>          at org.drools.marshalling.impl.ProtobufInputMarshaller.readSession(ProtobufInputMarshaller.java:259)</p><p>          at org.drools.marshalling.impl.ProtobufInputMarshaller.readSession(ProtobufInputMarshaller.java:161)</p><p>          at org.drools.marshalling.impl.ProtobufMarshaller.unmarshall(ProtobufMarshaller.java:117)</p><p>          at org.drools.persistence.SessionMarshallingHelper.loadSnapshot(SessionMarshallingHelper.java:91)</p><p>          ... 36 more</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>And finally... here is a screen of the moment the JpaProcessPersistenceContextManager is initialized using the cmdScopedEntityManager which is null</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><a href="https://community.jboss.org/servlet/JiveServlet/showImage/2-745095-18921/jpaprocesspersistenceCM.png"><span> https://community.jboss.org/servlet/JiveServlet/downloadImage/2-745095-18921/450-248/jpaprocesspersistenceCM.png </span></a></p></div>
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