I'm new to using jBPM and am trying to query the jBPM database objects. I run a query that returns summary data containing the process and the number of tasks for the process. The summary data is displayed, however, the user then trys to click a process to display a list of tasks for that process, but receives a LazyInitializationException instead. How can I make the jBPM Session behave in similar manner to the seam managed PC? Is there anyway to make jBPM use seams entity manager instead? Any ideas on how to solve this problem would be greatly appreciated. Cheers, Pete. Named query called jbpm.getProcesses | SELECT | count(t.processDefinition.id), t.processDefinition.id | FROM | org.jbpm.taskmgmt.exe.PooledActor pooledActor | JOIN | pooledActor.taskInstances ti | JOIN | ti.task t | WHERE | pooledActor.actorId in ( :actorIds ) | AND | ti.actorId is null | AND | ti.isSuspended != true | AND | ti.isOpen = true | GROUP BY | t.processDefinition.id | Code that is used in a summary process list: | public List<ProcessResult> getProcessSummary(List<String> pooledActorIds) { | org.hibernate.Query taskQuery = jbpmContext.getSession().getNamedQuery("jbpm.getProcesses") ; | taskQuery.setParameterList("actorIds", pooledActorIds) ; | List<ProcessResult> results = new ArrayList<ProcessResult>() ; | List<Object[]> queryResults = taskQuery.list() ; | for (Object[] result : queryResults) { | ProcessDefinition process = (ProcessDefinition) jbpmContext.getSession().load(ProcessDefinition.class, (Serializable)result[1]) ; | results.add(new ProcessResult((Long)result[0], process)) ; | } | return results ; | Code that causes a LIE | public Collection<Task> getTasksFromProcess(ProcessResult process) { | if (process != null) { | // next line causes LIE | Map<String, Task> tasks = (Map<String, Task>) process.getProcess().getTaskMgmtDefinition().getTasks() ; | return tasks.values() ; | } else { | return null; | } | } | | The LIE in the log | org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: org.jbpm.graph.def.ProcessDefinition.definitions, no session or session was closed | at org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationException(AbstractPersistentCollection.java:358) | at org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationExceptionIfNotConnected(AbstractPersistentCollection.java:350) | at org.hibernate.collection.AbstractPersistentCollection.readElementByIndex(AbstractPersistentCollection.java:151) | at org.hibernate.collection.PersistentMap.get(PersistentMap.java:146) | at org.jbpm.graph.def.ProcessDefinition.getDefinition(ProcessDefinition.java:431) | at org.jbpm.graph.def.ProcessDefinition.getTaskMgmtDefinition(ProcessDefinition.java:444) | 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.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.invoke(JavassistLazyInitializer.java:173) | at org.jbpm.graph.def.ProcessDefinition_$$_javassist_95.getTaskMgmtDefinition(ProcessDefinition_$$_javassist_95.java) | at uk.co.iblocks.iflow.web.tree.expansion.JbpmExpansion.getProcessSummary(JbpmExpansion.java:402) | at uk.co.iblocks.iflow.web.tree.expansion.JbpmExpansion.addTaskNodes(JbpmExpansion.java:129) | at uk.co.iblocks.iflow.web.tree.expansion.JbpmExpansion$$FastClassByCGLIB$$b998e405.invoke(<generated>) | at net.sf.cglib.proxy.MethodProxy.invoke(MethodProxy.java:149) | at org.jboss.seam.intercept.RootInvocationContext.proceed(RootInvocationContext.java:45) | at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:57) | at org.jboss.seam.interceptors.RollbackInterceptor.aroundInvoke(RollbackInterceptor.java:34) | at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:69) | at org.jboss.seam.interceptors.BijectionInterceptor.aroundInvoke(BijectionInterceptor.java:47) | at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:69) | at org.jboss.seam.interceptors.BusinessProcessInterceptor.aroundInvoke(BusinessProcessInterceptor.java:51) | at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:69) | at org.jboss.seam.interceptors.MethodContextInterceptor.aroundInvoke(MethodContextInterceptor.java:27) | at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:69) | at org.jboss.seam.interceptors.SecurityInterceptor.aroundInvoke(SecurityInterceptor.java:37) | at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:69) | at org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:103) | at org.jboss.seam.intercept.JavaBeanInterceptor.interceptInvocation(JavaBeanInterceptor.java:154) | at org.jboss.seam.intercept.JavaBeanInterceptor.intercept(JavaBeanInterceptor.java:89) | at uk.co.iblocks.iflow.web.tree.expansion.JbpmExpansion$$EnhancerByCGLIB$$9eed0613.addTaskNodes(<generated>) | at uk.co.iblocks.iflow.web.tree.expansion.JbpmExpansion$JbpmType$3.addNodes(JbpmExpansion.java:68) | at uk.co.iblocks.iflow.web.tree.expansion.JbpmExpansion.addNodes(JbpmExpansion.java:77) | at uk.co.iblocks.iflow.web.TreeBean.exploreNode(TreeBean.java:270) | at uk.co.iblocks.iflow.web.tree.TreeData$DebugNodeListener.exploreNode(TreeData.java:59) | at uk.co.iblocks.iflow.web.tree.TreeData$DebugNodeListener.exploreNode(TreeData.java:59) | at uk.co.iblocks.iflow.web.tree.TreeData$DebugNodeListener.exploreNode(TreeData.java:59) | at uk.co.iblocks.iflow.web.tree.TreeData.setExpanded(TreeData.java:414) | at com.icesoft.faces.component.tree.TreeRenderer.decode(TreeRenderer.java:109) | at javax.faces.component.UIComponentBase.decode(UIComponentBase.java:500) | at com.icesoft.faces.component.tree.Tree.processDecodes(Tree.java:857) | at javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:602) | at javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:602) | at javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:602) | at javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:602) | at javax.faces.component.UIForm.processDecodes(UIForm.java:53) | at javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:602) | at javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:602) | at javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:602) | at javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:602) | at javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:602) | at javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:602) | at javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:602) | at javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:602) | at javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:602) | at javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:602) | at javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:602) | at javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:602) | at javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:602) | at javax.faces.component.UIViewRoot.processDecodes(UIViewRoot.java:135) | at org.apache.myfaces.lifecycle.LifecycleImpl.applyRequestValues(LifecycleImpl.java:219) | at org.apache.myfaces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:71) | at com.icesoft.faces.webapp.xmlhttp.BlockingServlet.renderCyclePartial(BlockingServlet.java:473) | at com.icesoft.faces.webapp.xmlhttp.BlockingServlet.receiveUpdates(BlockingServlet.java:442) | at com.icesoft.faces.webapp.xmlhttp.BlockingServlet.executeRequest(BlockingServlet.java:324) | at com.icesoft.faces.webapp.xmlhttp.BlockingServlet.service(BlockingServlet.java:186) | at javax.servlet.http.HttpServlet.service(HttpServlet.java:810) | at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252) | at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) | at org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:393) | at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) | at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) | at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96) | at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) | at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) | at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213) | at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178) | at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:175) | at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74) | at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126) | at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105) | at org.jboss.web.tomcat.tc5.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:156) | at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107) | at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148) | at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869) | at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664) | at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527) | at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112) | at java.lang.Thread.run(Thread.java:619) | View the original post : 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