Getting errors while deploying sample jBPM Workflow.

[dynamolalit]

Hi,

I have configured Alfresco 3.0 on JBoss 4.2.2 & I have created a sample workflow using eclipse as

<?xml version="1.0" encoding="UTF-8"?>

<process-definition 
  xmlns="urn:jbpm.org:jpdl-3.2"
  name="simple">
   <start-state name="start">
      <transition name="to_state" to="first">
         <action name="action" class="com.sample.action.MessageActionHandler">
            <message>Going to the first state!</message>
         </action>
      </transition>
   </start-state>
   <state name="first">
      <transition name="to_end" to="end">
         <action name="action" class="com.sample.action.MessageActionHandler">
            <message>About to finish!</message>
         </action>
      </transition>
   </state>
   <end-state name="end"></end-state>
</process-definition>‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

But while using this workflow on content in my workspace,i am getting these errors on my alfresco server console.

10:01:39,229 INFO  [STDOUT] 10:01:39,219 User:admin ERROR [ui.common.Utils] A system error happened during the operation: null
java.lang.NullPointerException
        at org.alfresco.web.bean.workflow.WorkflowUtil.prepareTaskParams(WorkflowUtil.java:190)
        at org.alfresco.web.bean.workflow.StartWorkflowWizard.finishImpl(StartWorkflowWizard.java:185)
        at org.alfresco.web.bean.dialog.BaseDialogBean$1.execute(BaseDialogBean.java:121)
        at org.alfresco.web.bean.dialog.BaseDialogBean$1.execute(BaseDialogBean.java:118)
        at org.alfresco.repo.transaction.RetryingTransactionHelper.doInTransaction(RetryingTransactionHelper.java:320)
        at org.alfresco.repo.transaction.RetryingTransactionHelper.doInTransaction(RetryingTransactionHelper.java:227)
        at org.alfresco.web.bean.dialog.BaseDialogBean.finish(BaseDialogBean.java:127)
        at org.alfresco.web.bean.wizard.WizardManager.finish(WizardManager.java:580)
        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:585)
        at org.apache.myfaces.el.MethodBindingImpl.invoke(MethodBindingImpl.java:132)
        at org.apache.myfaces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:61)
        at javax.faces.component.UICommand.broadcast(UICommand.java:109)
        at javax.faces.component.UIViewRoot._broadcastForPhase(UIViewRoot.java:97)
        at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:171)
        at org.apache.myfaces.lifecycle.InvokeApplicationExecutor.execute(InvokeApplicationExecutor.java:32)
        at org.apache.myfaces.lifecycle.LifecycleImpl.executePhase(LifecycleImpl.java:95)
        at org.apache.myfaces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:70)
        at javax.faces.webapp.FacesServlet.service(FacesServlet.java:139)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at org.alfresco.web.app.servlet.AuthenticationFilter.doFilter(AuthenticationFilter.java:81)
        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.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:595)

It can be the case that some more files are needed to deploy  this workflow but i am not getting any help.

Please help me resolve the issue.It is very urgent.

Thank You,
Regards,
Lalit

[janv]

Based on the stacktrace, the code currently requires a start task definition in order to set the start task node. For examples, please refer to the OOTB process definitions (eg. adhoc_processDefinition.xml) or alternatively: http://wiki.alfresco.com/wiki/WorkflowAdministration#Hand_developed_jPDL_XML_Definition

   …
   <start-state name="start">
      <task name="wf:submitAdhocTask" swimlane="initiator"/>
      <transition name="" to="adhoc"/>
   </start-state>
   …
‍‍‍‍‍‍‍‍

Regards,
Jan

[dynamolalit]

Hi,

Thanks very much for help.I am very new to Alfresco.Can you help me out from where to start reading to developed advanced workflows in Alfresco.I have seen talks of white papers but not able to find one.Any suggested reading?


Thank You,
Regards,
Lalit

[jayjayecl]

Hi

http://ecmarchitect.com/archives/2007/11/19/785