[jbpm-dev] process instance BPMN and variable scope memory leak
Mauricio Salatino
salaboy at gmail.com
Tue Jun 3 06:27:19 EDT 2014
Can you please attach a maven project? or the link to a maven project that
we can just clone from github and run?
That will give us more time to evaluate the problem, instead of wasting
time in setting up the project.
On Tue, Jun 3, 2014 at 11:13 AM, <paul.chaunguyen at externe.bnpparibas.com>
wrote:
> Hi
>
>
> *1/ Here is my snapshot code which initilize session to use bpmn:*
>
> *protected* *void* startProcess(T processContext) *throws* ProcessException
> {
> *log*.info("Executing BPMN process : " + getProcessName().getProcessId()
> + " ...");
> // *init* common properties when entering in process
> init(processContext);
>
> audit(processContext);
>
> // process execution
> // load up the knowledge base
> StatefulKnowledgeSession ksession = *null*;
>
> KnowledgeRuntimeLogger fileLogger = *null*;
>
> String auditFileName = getAuditFileName(getProcessName(), processContext);
> ProcessInstance processInstance = *null*;
>
> *try* {
> ksession = omsRulesManager.getOmsRulesService().getKnownledgeBase()
> .newStatefulKnowledgeSession();
>
> *if* (*log*.isDebugEnabled()) {
> String folder = System.*getProperty*("Log4j.OUTPUT_DIR");
>
> *if* (StringUtils.*isEmpty*(folder)) {
> folder = System.*getProperty*("java.io.tmpdir");
> }
>
> String fullFileName = folder + File.*separator* + auditFileName;
>
> fileLogger = KnowledgeRuntimeLoggerFactory.*newFileLogger*(
> ksession, fullFileName);
>
> ksession.addEventListener(*new* DebugWorkingMemoryEventListener());
> ksession.addEventListener(*new* DebugAgendaEventListener());
> }
>
> *log*.debug("Starting workflow process : " +
> getProcessName().getProcessId()
> + " ...");
>
> ksession.setGlobal("log", *log*);
>
> // populate knowledge session global
> Map<String, Object> global = getSessionGlobal(processContext);
> populateGlobalSession(ksession, global);
>
> Map<String, Object> parameters = getProcessParameters(processContext);
>
> ksession.insert((OrderContext) processContext);
> processInstance = ksession.startProcess(getProcessName().getProcessId(),
> parameters);
>
> ksession.insert(processInstance);
> ksession.fireAllRules();
>
> *if*(fileLogger != *null*) {
> fileLogger.close();
> }
>
> parameters = *null*;
> } *catch* (Exception e) {
> *throw* *new* ProcessException(e.getMessage(), e);
> } *finally* {
> ksession.dispose(); // free memory
> processInstance = *null*;
> ksession = *null*;
> }
>
> *log*.info("BPMN process : " + getProcessName().name() + " executed");
> }
>
>
> /**
> * Default
> * *@param* processContext
> * *@return*
> */
> @SuppressWarnings("unchecked")
> *protected* Map<String, Object> getProcessParameters(OmsProcessContext
> processContext) {
> Map map = *new* HashMap();
> map.put("orderContext", (OrderContext) processContext);
> *return* map;
> }
>
>
> *2/ and bpmn this was very complex, I just create small one to simulate
> the case *
>
> ------ BEGIN BPMN -----
>
> <?*xml* version="1.0" encoding="UTF-8"?>
> <definitions id="Definition"
> targetNamespace="http://www.jboss.org/drools"
> typeLanguage="http://www.java.com/javaTypes"
> expressionLanguage="http://www.mvel.org/2.0"
> *xmlns*="http://www.omg.org/spec/BPMN/20100524/MODEL"
> xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
> xsi:schemaLocation="
> http://www.omg.org/spec/BPMN/20100524/MODEL BPMN20.*xsd*"
> xmlns:g="http://www.jboss.org/drools/flow/gpd"
> xmlns:bpmndi="http://www.omg.org/spec/BPMN/20100524/DI"
> xmlns:dc="http://www.omg.org/spec/DD/20100524/DC"
> xmlns:di="http://www.omg.org/spec/DD/20100524/DI"
> xmlns:tns="http://www.jboss.org/drools">
>
> <itemDefinition id="_orderContextItem"
> structureRef="com.bp2s.oms.process.OrderContext" />
>
> <process processType="Private" isExecutable="true"
> id="com.bp2s.oms.dealing.process.OrderReceptionProcess"
> name="OrderReceptionProcess" tns:packageName="com.bp2s.oms.dealing.process"
> >
>
> <extensionElements>
> <tns:import name="com.bp2s.oms.corecontrol.ValidationResult" />
> <tns:import
> name="com.bp2s.oms.corecontrol.service.CoreControlTreeService" />
> <tns:import name="com.bp2s.oms.core.service.OrderService" />
> <tns:import
> name="com.bp2s.oms.corecontrol.service.CoreControlTreeService.CoreControlTree"
> />
> <tns:import name="com.bp2s.oms.core.error.OrderInErrorService" />
> <tns:import name="com.bp2s.oms.model.common.OrderStatus.Status" />
> <tns:import name="com.bp2s.oms.model.process.Disposition" />
> <tns:import name="com.bp2s.oms.model.staticdata.Fund" />
> <tns:import name="com.bp2s.oms.model.task.TaskContext" />
> <tns:import name="com.bp2s.oms.process.OmsProcessContext" />
> <tns:import name="com.bp2s.oms.process.OrderContext" />
> <tns:import
> name="com.bp2s.oms.process.OmsProcessContext.IncomingMode" />
> <tns:import name="com.bp2s.oms.process.OmsProcessContext.ComingFrom"
> />
> <tns:import name="com.bp2s.oms.status.management.OrderStatusService"
> />
> <tns:import name="com.bp2s.oms.task.TaskContextFactory" />
> <tns:import name="com.bp2s.oms.task.TaskContextQueue" />
> <tns:import name="com.bp2s.oms.corecontrol.CoreControlError" />
> <tns:import name="org.apache.commons.logging.Log" />
> <tns:import name="com.bp2s.oms.model.process.OrderInError" />
> <tns:import name="com.bp2s.oms.model.process.Operation" />
> <tns:import name="java.util.List" />
> <tns:import
> name="com.bp2s.oms.corecontrol.CoreControlError.ErrorCode" />
> <tns:import name="com.bp2s.oms.dao.StoredProcedureDAO" />
> <tns:global identifier="queue" type="TaskContextQueue" />
> <tns:global identifier="orderService" type="OrderService" />
> <tns:global identifier="coreControlTreeService"
> type="CoreControlTreeService" />
> <tns:global identifier="storedProcedureDAO" type="StoredProcedureDAO"
> />
> <tns:global identifier="taskContextFactory" type="TaskContextFactory"
> />
> <tns:global identifier="log" type="Log" />
> <tns:global identifier="orderStatusService" type="OrderStatusService"
> />
> <tns:global identifier="orderInErrorService"
> type="OrderInErrorService" />
> </extensionElements>
> <!-- process variables -->
> <property id="orderContext" itemSubjectRef="_orderContextItem"/>
>
> <!-- nodes -->
> <startEvent id="_1" name="StartProcess" />
> <endEvent id="_2" name="End" >
> <terminateEventDefinition />
> </endEvent>
> <scriptTask id="_3" name="test parameters " scriptFormat="
> http://www.java.com/java" >
> <script>log.info("I am here : " + orderContext.toString());</script>
> </scriptTask>
>
> <!-- connections -->
> <sequenceFlow id="_3-_2" sourceRef="_3" targetRef="_2" />
> <sequenceFlow id="_1-_3" sourceRef="_1" targetRef="_3" />
>
> </process>
>
> <bpmndi:BPMNDiagram>
> <bpmndi:BPMNPlane
> bpmnElement="com.bp2s.oms.dealing.process.OrderReceptionProcess" >
> <bpmndi:BPMNShape bpmnElement="_1" >
> <dc:Bounds x="324" y="82" width="48" height="48" />
> </bpmndi:BPMNShape>
> <bpmndi:BPMNShape bpmnElement="_2" >
> <dc:Bounds x="324" y="264" width="48" height="48" />
> </bpmndi:BPMNShape>
> <bpmndi:BPMNShape bpmnElement="_3" >
> <dc:Bounds x="240" y="168" width="217" height="48" />
> </bpmndi:BPMNShape>
> <bpmndi:BPMNEdge bpmnElement="_3-_2" >
> <di:waypoint x="348" y="192" />
> <di:waypoint x="348" y="288" />
> </bpmndi:BPMNEdge>
> <bpmndi:BPMNEdge bpmnElement="_1-_3" >
> <di:waypoint x="348" y="106" />
> <di:waypoint x="348" y="192" />
> </bpmndi:BPMNEdge>
> </bpmndi:BPMNPlane>
> </bpmndi:BPMNDiagram>
>
> </definitions>
>
> ----- END BPMN
>
>
> 3/ Memory dump after forcing GC
>
> OrderContext is always here after calling BPMN with orderContext in
> process parameter
>
>
>
> Thanks in advance,
>
> Regards,
>
>
> Paul
>
>
>
> [image: Inactive hide details for salaboy---03/06/2014 11:58:47---Can you
> please provide a reproducer for this: 2/ We try to change thi]salaboy---03/06/2014
> 11:58:47---Can you please provide a reproducer for this: 2/ We try to
> change this in moving object (prototype)
>
>
>
> *Re: [jbpm-dev] process instance BPMN and variable scope memory leak*
>
>
> *(Internet)*
> *salaboy *
>
>
> To:
> Paul CHAU N'GUYEN
> Cc:
> jbpm-dev
> 03/06/2014 11:58
>
>
> ------------------------------
>
>
>
> Can you please provide a reproducer for this:
>
> 2/ We try to change this in moving object (prototype) to process
> parameters map, --> still the same issue: after bpmn execution object is
> still there JVM garbage collection can not removed it
>
> so we can check it out?
>
> Usually a Junit inside a maven project is enough
>
>
> On Tue, Jun 3, 2014 at 10:41 AM, <*paul.chaunguyen at externe.bnpparibas.com*
> <paul.chaunguyen at externe.bnpparibas.com>> wrote:
>
> Dear all,
>
> We are facing big issue with variable scope so application failed to
> out of memory with BPMN.
>
> Our situtation is below
>
> 1/ Initially, we put an object (prototype) as global inside BPMN -->
> after bpmn execution object is still there JVM garbage collection can not
> removed it
>
> 2/ We try to change this in moving object (prototype) to process
> parameters map, --> still the same issue: after bpmn execution object is
> still there JVM garbage collection can not removed it
>
>
> 3/ We try to use this object as facts but can not get the good syntax
> in java dialect to process as document or user guide related BPMN is very
> poor, Can you help please ?
>
> Many thanks,
>
>
> Regards,
>
> Paul
>
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> --
> - MyJourney @ *http://salaboy.com* <http://salaboy.wordpress.com/>
> - Co-Founder @ *http://www.jugargentina.org*
> <http://www.jugargentina.org/>
> - Co-Founder @ *http://www.jbug.com.ar* <http://www.jbug.com.ar/>
>
> - Salatino "Salaboy" Mauricio -
>
>
--
- MyJourney @ http://salaboy.com <http://salaboy.wordpress.com>
- Co-Founder @ http://www.jugargentina.org
- Co-Founder @ http://www.jbug.com.ar
- Salatino "Salaboy" Mauricio -
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