couldn't get task instances list for actor pooledTaskInstanc
Hello,
I have a problem regarding use of a pooledTaskInstanceList on my agenda. I'm using jBPM 3.2.2.GA and JBoss 4.2.2.GA server.
I create a new process instance using an annotated method:
@End
@CreateProcess(definition = "KNFExport", processKey = "#{exportId}")
public String saveExport() {Then I access my agenda :
<!DOCTYPE composition PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<ui:composition xmlns="http://www.w3.org/1999/xhtml"
xmlns:s="http://jboss.com/products/seam/taglib"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:a="http://richfaces.org/a4j" template="/layout/template.xhtml"
xmlns:rich="http://richfaces.org/rich">
<ui:define name="titlebar">#{messages['agenda.list']}</ui:define>
<ui:define name="body">
<rich:panel>
<f:facet name="header">#{messages['agenda.ownTasks']}</f:facet>
<h:form id="list">
<h:outputText
value="#{messages['agenda.noOwnTasks']}"
rendered="#{empty taskInstanceList}" /> <h:dataTable
value="#{taskInstanceList}" var="task"
rendered="#{not empty taskInstanceList}">
<h:column>
<f:facet name="header">
<h:outputText value="#{messages['agenda.desc']}" />
</f:facet>
<h:inputText value="#{task.description}" readonly="true"/>
</h:column>
<h:column>
<f:facet name="header">
<h:outputText value="#{messages['agenda.name']}" />
</f:facet>
<h:inputText value="#{task.name}" readonly="true"/>
</h:column>
<h:column>
<f:facet name="header">
<h:outputText value="#{messages['id']}" />
</f:facet>
<h:inputText value="#{task.id}" />
</h:column>
<h:column>
<f:facet name="header">
<h:outputText value="#{messages['agenda.created']}" />
</f:facet>
<h:inputText
value="#{task.taskMgmtInstance.processInstance.start}">
<f:convertDateTime type="date" />
</h:inputText>
</h:column>
</h:dataTable>
</h:form>
</rich:panel>
<rich:panel>
<f:facet name="header">#{messages['agenda.groupTasks']}</f:facet>
<h:form>
<h:outputText
value="#{messages['agenda.noGroupTasks']}"
rendered="#{empty pooledTaskInstanceList}" /><h:dataTable
value="#{pooledTaskInstanceList}" var="task"
rendered="#{not empty pooledTaskInstanceList}">
<h:column>
<f:facet name="header">
<h:outputText value="#{messages['agenda.desc']}" />
</f:facet>
<h:inputText value="#{task.description}" readonly="true"/>
</h:column>
<h:column>
<f:facet name="header">
<h:outputText value="#{messages['agenda.name']}" />
</f:facet>
<h:inputText value="#{task.name}" readonly="true"/>
</h:column>
<h:column>
<f:facet name="header">
<h:outputText value="#{messages['id']}" />
</f:facet>
<h:inputText value="#{task.id}" readonly="true"/>
</h:column>
<h:column>
<f:facet name="header">
<h:outputText value="#{messages['agenda.created']}" />
</f:facet>
<h:outputText
value="#{task.taskMgmtInstance.processInstance.start}">
<f:convertDateTime type="date" readonly="true"/>
</h:outputText>
</h:column>
<h:column>
<f:facet name="header">
</f:facet>
<s:button action="#{pooledTask.assignToCurrentActor}"
taskInstance="#{task}" value="#{messages['agenda.assignToMe']}">
<a:support event="onclick" reRender="taskList" />
</s:button>
</h:column>
</h:dataTable>
</h:form>
</rich:panel>
</ui:define>
</ui:composition>On my agenda I can see a newly created task on a group task list.
When I use the 'assign to me' button,
instead of a rendered page I get an error:
"couldn't get task instances list for actor 'admin'"
The stack trace:
org.jbpm.JbpmException: couldn't get task instances list for actor 'admin' at org.jbpm.db.TaskMgmtSession.findTaskInstances(TaskMgmtSession.java:67) at org.jbpm.JbpmContext.getTaskList(JbpmContext.java:191) at org.jboss.seam.bpm.TaskInstanceList.getTaskInstanceList(TaskInstanceList.java:40) at org.jboss.seam.bpm.TaskInstanceList.getTaskInstanceList(TaskInstanceList.java:33) at sun.reflect.GeneratedMethodAccessor579.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.jboss.seam.util.Reflections.invoke(Reflections.java:22) at org.jboss.seam.intercept.RootInvocationContext.proceed(RootInvocationContext.java:31) at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:56) at org.jboss.seam.transaction.RollbackInterceptor.aroundInvoke(RollbackInterceptor.java:28) at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68) at org.jboss.seam.bpm.BusinessProcessInterceptor.aroundInvoke(BusinessProcessInterceptor.java:51) at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68) at org.jboss.seam.transaction.TransactionInterceptor$1.work(TransactionInterceptor.java:95) at org.jboss.seam.util.Work.workInTransaction(Work.java:47) at org.jboss.seam.transaction.TransactionInterceptor.aroundInvoke(TransactionInterceptor.java:89) at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68) at org.jboss.seam.core.MethodContextInterceptor.aroundInvoke(MethodContextInterceptor.java:44) at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68) at org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:107) at org.jboss.seam.intercept.JavaBeanInterceptor.interceptInvocation(JavaBeanInterceptor.java:185) at org.jboss.seam.intercept.JavaBeanInterceptor.invoke(JavaBeanInterceptor.java:103) at org.jboss.seam.bpm.TaskInstanceList_$$_javassist_7.getTaskInstanceList(TaskInstanceList_$$_javassist_7.java) at sun.reflect.GeneratedMethodAccessor578.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.jboss.seam.util.Reflections.invoke(Reflections.java:22) at org.jboss.seam.util.Reflections.invokeAndWrap(Reflections.java:144) at org.jboss.seam.Component.callComponentMethod(Component.java:2211) at org.jboss.seam.Component.unwrap(Component.java:2237) at org.jboss.seam.Component.getInstance(Component.java:2004) at org.jboss.seam.Component.getInstance(Component.java:1950) at org.jboss.seam.Component.getInstance(Component.java:1944) at org.jboss.seam.Namespace.getComponentInstance(Namespace.java:55) at org.jboss.seam.Namespace.getComponentInstance(Namespace.java:50) at org.jboss.seam.el.SeamELResolver.resolveBase(SeamELResolver.java:177) at org.jboss.seam.el.SeamELResolver.getValue(SeamELResolver.java:53) at javax.el.CompositeELResolver.getValue(CompositeELResolver.java:53) at com.sun.faces.el.FacesCompositeELResolver.getValue(FacesCompositeELResolver.java:64) at org.jboss.el.parser.AstIdentifier.getValue(AstIdentifier.java:44) at org.jboss.el.parser.AstEmpty.getValue(AstEmpty.java:29) at org.jboss.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:186) at com.sun.facelets.el.TagValueExpression.getValue(TagValueExpression.java:71) at javax.faces.component.UIComponentBase.isRendered(UIComponentBase.java:370) at javax.faces.component.UIComponent.encodeAll(UIComponent.java:880) at javax.faces.render.Renderer.encodeChildren(Renderer.java:137) at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:812) at org.ajax4jsf.renderkit.RendererBase.renderChild(RendererBase.java:282) at org.ajax4jsf.renderkit.RendererBase.renderChildren(RendererBase.java:262) at org.richfaces.renderkit.html.PanelRenderer.doEncodeChildren(PanelRenderer.java:220) at org.richfaces.renderkit.html.PanelRenderer.doEncodeChildren(PanelRenderer.java:215) at org.ajax4jsf.renderkit.RendererBase.encodeChildren(RendererBase.java:121) at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:812) at javax.faces.component.UIComponent.encodeAll(UIComponent.java:886) at javax.faces.component.UIComponent.encodeAll(UIComponent.java:892) at com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.java:592) at org.ajax4jsf.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:100) at org.ajax4jsf.application.AjaxViewHandler.renderView(AjaxViewHandler.java:176) at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:106) at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:251) at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:144) at javax.faces.webapp.FacesServlet.service(FacesServlet.java:245) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83) at org.jboss.seam.web.IdentityFilter.doFilter(IdentityFilter.java:40) at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) at org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:90) at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64) at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45) at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:178) at org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:290) at org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:390) at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:517) at org.jboss.seam.web.Ajax4jsfFilter.doFilter(Ajax4jsfFilter.java:56) at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) at org.jboss.seam.web.LoggingFilter.doFilter(LoggingFilter.java:58) at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) at org.jboss.seam.web.HotDeployFilter.doFilter(HotDeployFilter.java:53) at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) at org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:158) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175) at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:432) at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:262) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446) at java.lang.Thread.run(Thread.java:619) Caused by: org.hibernate.SessionException: Session is closed! at org.hibernate.impl.AbstractSessionImpl.errorIfClosed(AbstractSessionImpl.java:49) at org.hibernate.impl.SessionImpl.getNamedQuery(SessionImpl.java:1258) at org.jbpm.db.TaskMgmtSession.findTaskInstances(TaskMgmtSession.java:61) ... 103 more
When I restart the JBoss server with cleaning all the data,tmp,work folders, then it works fine. I see a task on my personal list(the task was transferred from one list to another despite the exception).
But if I click the 'Assing to me' button, I get the same exception as before.
The same situation is when I have more tasks on both lists and when transfering a task from group task list to my task list.
One time or two I got this exception as a cause instead of "Session is closed"
Caused by: java.lang.ClassCastException: org.jbpm.taskmgmt.exe.TaskInstance cannot be cast to java.lang.Long at org.jbpm.db.TaskMgmtSession.findPooledTaskInstances(TaskMgmtSession.java:137)
I'm only using a built-in pooledTaskInstanceList and taskInstanceList components and I don't get why the ClassCastException...
Can anyone tell me what could be the cause?
I've searched the forum but couldn't find anything useful.
I can provide any additional info to help you solve this.
Regards,
Andrzej Urban
