3 Replies Latest reply on Aug 27, 2009 5:07 AM by Andrzej Urban

    couldn't get task instances list for actor pooledTaskInstanc

    Andrzej Urban Newbie

      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.

      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