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(a)externe.bnpparibas.com* <paul.chaunguyen(a)externe.bnpparibas.com&gt;&gt; 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 This message and any attachments (the "message") is intended solely for the intended addressees and is confidential. 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