2:22 p.m.
Bira Neto [https://community.jboss.org/people/biraneto] created the discussion
"Null cmdScopedEntityManager during stateful session load"
To view the discussion, visit: https://community.jboss.org/message/744900#744900
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I am getting a nullpointerexception during ksession load due to a null
cmdScopedEntityManager (from JpaPersistenceContextManager).
First I created a conditional event and executed a instance of this workflow (which
results in an active workflow waiting for a condition)
After restarting my server, the session load will fire (or try to fire) an
ActivationCreatedEventImpl for my pending rule (named after my process....
RuleFlowStateNode-conditionalTest_2_0-7)
The problem though.... is that when calling getProcessInstancesWaitingForEvent it will try
to call a getProcessPersistenceContext() implementation which tries to return a new
JpaProcessPersistenceContext( cmdScopedEntityManager );
This cmdScopedEntityManager was not initialized yet though. It seems to be lazy
initialized during beginCommandScopedEntityManager (from JpaPersistenceContextManager).
Is that a bug or is there some way or something else I need to add to my environment to
use this properly?
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5:11 p.m.
New subject: [jBPM] - Re: Null cmdScopedEntityManager during stateful session load
Maciej Swiderski [https://community.jboss.org/people/swiderski.maciej] created the
discussion
"Re: Null cmdScopedEntityManager during stateful session load"
To view the discussion, visit: https://community.jboss.org/message/744916#744916
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could you upload your process definition and some details about your environment setup so
we could verify if that is an issue or any configuration is missing?
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11:56 a.m.
New subject: [jBPM] - Re: Null cmdScopedEntityManager during stateful session load
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/...
https://community.jboss.org/servlet/JiveServlet/downloadImage/2-745095-18...
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12:44 p.m.
New subject: [jBPM] - Re: Null cmdScopedEntityManager during stateful session load
Maciej Swiderski [https://community.jboss.org/people/swiderski.maciej] created the
discussion
"Re: Null cmdScopedEntityManager during stateful session load"
To view the discussion, visit: https://community.jboss.org/message/745102#745102
--------------------------------------------------------------
do you mange transaction your self? If not remove UT from the environment and let jbpm to
handle transactions internally.
HTH
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2:57 p.m.
New subject: [jBPM] - Re: Null cmdScopedEntityManager during stateful session load
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/745146#745146
--------------------------------------------------------------
Unfortunately, not passing the transaction is not a good option for me as I don't want
to use and have to setup jndi on a specific server (I want to abstract this issues)
What solved for me was to bypass the current JpaProcessPersistenceContextManager
implementation (which may still have a bug... I would make some tests).
I changed my environment initialization to
env.set(EnvironmentName.ENTITY_MANAGER_FACTORY, emf);
env.set(EnvironmentName.TRANSACTION, ut);
env.set(EnvironmentName.TRANSACTION_MANAGER, new
JtaTransactionManager( ut,
env.get( EnvironmentName.TRANSACTION_SYNCHRONIZATION_REGISTRY ),
TransactionManagerServices.getTransactionManager() ));
env.set(EnvironmentName.PERSISTENCE_CONTEXT_MANAGER, new
JPAProcessPersistenceContextManagerPk(env));
On my JPAProcessPersistenceContextManagerPk (extends JpaProcessPersistenceContextManager)
I overrided the current getProcessPersistenceContext to the implementation below
public ProcessPersistenceContext getProcessPersistenceContext() {
if (cmdScopedEntityManager == null) {
this.beginCommandScopedEntityManager();
}
return new JpaProcessPersistenceContext( cmdScopedEntityManager );
}
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5047
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Bira Neto -
Maciej Swiderski