[jboss-user] [jBPM] - How to revisit an old state in jbpm 3.2.8?

[Buat Apa]

Buat Apa [http://community.jboss.org/people/buatapa] created the discussion

"How to revisit an old state in jbpm 3.2.8?"

To view the discussion, visit: http://community.jboss.org/message/574799#574799

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I tried the followings using jbpm 3.2.8. When I end with "no", which should go back to the previous state (*submitForm)*, but I got the following errors occasionally. Did I do something wrong, or what is the right way?





Caused by:

java.util.ConcurrentModificationExceptionat java.util.HashMap$HashIterator.nextEntry(

HashMap.java:793
)at java.util.HashMap$KeyIterator.next(


HashMap.java:828
)at org.hibernate.collection.AbstractPersistentCollection$IteratorProxy.next(


AbstractPersistentCollection.java:555
)

java code (I am in open approveForm state)









Collection taskList = processInstance.getTaskMgmtInstance().getTaskInstances();
Iterator<?> iter = taskList.iterator();



*while*  (iter.hasNext()) { TaskInstance taskInstance = (TaskInstance) iter.next();



*        if* (taskInstance.isOpen()) {


               taskInstance.*end*(approve ?

"yes" *:**"no"*);        }
}

......

process definition code


 
<start-state name="start">
  <transition to="submitForm"></transition>
 </start-state>

 <task-node name="*submitForm*">
  <task name="submitForm">
   <assignment actor-id="submitter"></assignment>
  </task>
  <transition to="approveForm"></transition>
 </task-node>
 <task-node name="approveForm">
  <task name="approveForm">
   <assignment actor-id="approver"></assignment>
  </task>
  <transition to="end" name="yes"></transition>
  <transition to="*submitForm*" name="*no*"></transition>
 </task-node>
 <end-state name="end">
 </end-state>
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