[jboss-user] [jBPM] - Re: Null cmdScopedEntityManager during stateful session load
Bira Neto
do-not-reply at jboss.com
Fri Jun 29 12:56:10 EDT 2012
Bira Neto [https://community.jboss.org/people/biraneto] created the discussion
"Re: Null cmdScopedEntityManager during stateful session load"
To view the discussion, visit: https://community.jboss.org/message/745095#745095
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I'm using jbpm 5.3 on tomcat with spring and Bitronix. Postgres DB.
My environment is being created like this:
EntityManagerFactory emf = Persistence.createEntityManagerFactory("com.framework.jpa");
Environment env = KnowledgeBaseFactory.newEnvironment();
env.set(EnvironmentName.ENTITY_MANAGER_FACTORY, emf);
env.set(EnvironmentName.TRANSACTION_MANAGER, TransactionManagerServices.getTransactionManager());
env.set(EnvironmentName.TRANSACTION, ut);
return env;
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.
<?xml version="1.0" encoding="UTF-8"?>
<definitions id="Definition"
targetNamespace=" http://jbpm.org/example/bpmn2 http://jbpm.org/example/bpmn2"
typeLanguage=" http://www.java.com/javaTypes http://www.java.com/javaTypes"
xmlns:java=" http://drools.org/semantics/java http://drools.org/semantics/java"
expressionLanguage=" http://www.mvel.org/2.0 http://www.mvel.org/2.0"
xmlns:xsi=" http://www.w3.org/2001/XMLSchema-instance http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation=" http://www.omg.org/spec/BPMN/20100524/MODEL http://www.omg.org/spec/BPMN/20100524/MODEL BPMN20.xsd"
xmlns=" http://www.omg.org/spec/BPMN/20100524/MODEL http://www.omg.org/spec/BPMN/20100524/MODEL"
xmlns:bpmndi=" http://www.omg.org/spec/BPMN/20100524/DI http://www.omg.org/spec/BPMN/20100524/DI"
xmlns:dc=" http://www.omg.org/spec/DD/20100524/DC http://www.omg.org/spec/DD/20100524/DC"
xmlns:di=" http://www.omg.org/spec/DD/20100524/DI http://www.omg.org/spec/DD/20100524/DI"
xmlns:tns=" http://www.jboss.org/drools http://www.jboss.org/drools">
<itemDefinition id="CTX_PROCESS_IDItem" structureRef="java.lang.Long" />
<process processType="Private" isExecutable="true"
id="conditionalTest_2_0" tns:packageName="defaultPackage" name="conditionalTest_2.0" >
<extensionElements>
<tns:import name="com.entities.*" />
<tns:import name="com.core.services.ServicePkAspect" />
</extensionElements>
<property id="CTX_PROCESS_ID" itemSubjectRef="tns:CTX_PROCESS_IDItem"/>
<endEvent id="id_3" name="id_3" ><incoming>id_17</incoming>
</endEvent>
<scriptTask id="id_7" name="id_7" ><incoming>id_10</incoming>
<outgoing>id_16</outgoing>
<script>ServicePkAspect.processAroundExecute("workflowServicePk", "executeRule", null, new String[]{"testRuleParam","testRuleParam","132710"}, CTX_PROCESS_ID);</script>
</scriptTask>
<exclusiveGateway id="id_6" name="id_6" gatewayDirection="Converging"><incoming>id_12</incoming>
<incoming>id_11</incoming>
<outgoing>id_17</outgoing>
</exclusiveGateway>
<scriptTask id="id_2" name="id_2" ><incoming>id_13</incoming>
<outgoing>id_10</outgoing>
<script> ServicePkAspect.processAroundExecute("workflowServicePk", "executePrepareTestRule", null, null, CTX_PROCESS_ID); return true; </script>
</scriptTask>
<startEvent id="id_4" name="id_4"><outgoing>id_13</outgoing>
</startEvent>
<parallelGateway id="id_8" name="id_8" gatewayDirection="Diverging"><incoming>id_16</incoming>
<outgoing>id_14</outgoing>
<outgoing>id_15</outgoing>
</parallelGateway>
<intermediateCatchEvent id="id_5" name="id_5">
<incoming>id_15</incoming>
<outgoing>id_12</outgoing>
<conditionalEventDefinition>
<condition xsi:type="tFormalExpression" > UserPk(idUser > 150)
</condition>
</conditionalEventDefinition>
</intermediateCatchEvent>
<intermediateCatchEvent id="id_9" name="id_9">
<incoming>id_14</incoming>
<outgoing>id_11</outgoing>
<conditionalEventDefinition>
<condition xsi:type="tFormalExpression" > UserPk(idUser <= 150)
</condition>
</conditionalEventDefinition>
</intermediateCatchEvent>
<sequenceFlow id="id_14" name="id_14" sourceRef="id_8" targetRef="id_9" > </sequenceFlow>
<sequenceFlow id="id_11" name="id_11" sourceRef="id_9" targetRef="id_6" > </sequenceFlow>
<sequenceFlow id="id_13" name="id_13" sourceRef="id_4" targetRef="id_2" > </sequenceFlow>
<sequenceFlow id="id_16" name="id_16" sourceRef="id_7" targetRef="id_8" > </sequenceFlow>
<sequenceFlow id="id_17" name="id_17" sourceRef="id_6" targetRef="id_3" >
<conditionExpression xsi:type="tFormalExpression">
return true;
</conditionExpression> </sequenceFlow>
<sequenceFlow id="id_12" name="id_12" sourceRef="id_5" targetRef="id_6" > </sequenceFlow>
<sequenceFlow id="id_15" name="id_15" sourceRef="id_8" targetRef="id_5" > </sequenceFlow>
<sequenceFlow id="id_10" name="id_10" sourceRef="id_2" targetRef="id_7" > </sequenceFlow>
</process>
</definitions>
When restarting the server with
ksession = JPAKnowledgeService.loadStatefulKnowledgeSession(sessionId, kbase, null, env );
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.
java.lang.RuntimeException: Unable to load session snapshot
at org.drools.persistence.SessionMarshallingHelper.loadSnapshot(SessionMarshallingHelper.java:96)
at org.drools.persistence.SingleSessionCommandService.initKsession(SingleSessionCommandService.java:253)
at org.drools.persistence.SingleSessionCommandService.<init>(SingleSessionCommandService.java:195)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at org.drools.persistence.jpa.KnowledgeStoreServiceImpl.buildCommandService(KnowledgeStoreServiceImpl.java:101)
at org.drools.persistence.jpa.KnowledgeStoreServiceImpl.loadStatefulKnowledgeSession(KnowledgeStoreServiceImpl.java:84)
at org.drools.persistence.jpa.JPAKnowledgeService.loadStatefulKnowledgeSession(JPAKnowledgeService.java:131)
at com.perkons.frameworkpk.fpk.core.workflows.WorkflowManagerPk.loadStatefulSession(WorkflowManagerPk.java:403)
at com.perkons.frameworkpk.fpk.core.workflows.WorkflowManagerPk.initialize(WorkflowManagerPk.java:120)
at com.perkons.frameworkpk.fpk.core.ContextLoaderListenerPk.contextInitialized(ContextLoaderListenerPk.java:92)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4205)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4704)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:799)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:779)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:601)
at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:675)
at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:601)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:502)
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1315)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:324)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:142)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1061)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:840)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:463)
at org.apache.catalina.core.StandardService.start(StandardService.java:525)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:754)
at org.apache.catalina.startup.Catalina.start(Catalina.java:595)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
Caused by: java.lang.NullPointerException
at org.jbpm.persistence.JpaProcessPersistenceContext.getProcessInstancesWaitingForEvent(JpaProcessPersistenceContext.java:35)
at org.jbpm.persistence.processinstance.JPASignalManager.getProcessInstancesForEvent(JPASignalManager.java:40)
at org.jbpm.persistence.processinstance.JPASignalManager.signalEvent(JPASignalManager.java:23)
at org.jbpm.process.instance.ProcessRuntimeImpl$2.activationCreated(ProcessRuntimeImpl.java:340)
at org.drools.impl.StatefulKnowledgeSessionImpl$AgendaEventListenerWrapper.activationCreated(StatefulKnowledgeSessionImpl.java:643)
at org.drools.event.AgendaEventSupport.fireActivationCreated(AgendaEventSupport.java:41)
at org.drools.common.DefaultAgenda.createActivation(DefaultAgenda.java:601)
at org.drools.reteoo.RuleTerminalNode.assertLeftTuple(RuleTerminalNode.java:257)
at org.drools.reteoo.SingleLeftTupleSinkAdapter.doPropagateAssertLeftTuple(SingleLeftTupleSinkAdapter.java:196)
at org.drools.reteoo.SingleLeftTupleSinkAdapter.createAndPropagateAssertLeftTuple(SingleLeftTupleSinkAdapter.java:145)
at org.drools.reteoo.LeftInputAdapterNode.assertObject(LeftInputAdapterNode.java:154)
at org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:59)
at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:141)
at org.drools.reteoo.CompositeObjectSinkAdapter.doPropagateAssertObject(CompositeObjectSinkAdapter.java:497)
at org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:382)
at org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:235)
at org.drools.reteoo.EntryPointNode.assertObject(EntryPointNode.java:240)
at org.drools.marshalling.impl.ProtobufInputMarshaller.assertHandleIntoOTN(ProtobufInputMarshaller.java:483)
at org.drools.marshalling.impl.ProtobufInputMarshaller.readFactHandles(ProtobufInputMarshaller.java:459)
at org.drools.marshalling.impl.ProtobufInputMarshaller.readSession(ProtobufInputMarshaller.java:259)
at org.drools.marshalling.impl.ProtobufInputMarshaller.readSession(ProtobufInputMarshaller.java:161)
at org.drools.marshalling.impl.ProtobufMarshaller.unmarshall(ProtobufMarshaller.java:117)
at org.drools.persistence.SessionMarshallingHelper.loadSnapshot(SessionMarshallingHelper.java:91)
... 36 more
And finally... here is a screen of the moment the JpaProcessPersistenceContextManager is initialized using the cmdScopedEntityManager which is null
https://community.jboss.org/servlet/JiveServlet/showImage/2-745095-18921/jpaprocesspersistenceCM.png https://community.jboss.org/servlet/JiveServlet/downloadImage/2-745095-18921/450-248/jpaprocesspersistenceCM.png
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