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<a href="http://community.jboss.org/index.jspa" style="text-decoration: none; color: #E1E1E1">JBoss Community</a></h1>
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How to revisit an old state in jbpm 3.2.8?
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created by <a href="http://community.jboss.org/people/buatapa">Buat Apa</a> in <i>jBPM</i> - <a href="http://community.jboss.org/message/574799#574799">View the full discussion</a>
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<div class="jive-rendered-content"><p><span style="font-size: 10pt;"><p>I tried the followings using jbpm 3.2.8. When I end with "no", which should go back to the previous state (<strong>submitForm)</strong>, but I got the following errors occasionally. Did I do something wrong, or what is the right way?</p><p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p></p><p align="left" style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p align="left" style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p align="left" style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p align="left" style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p align="left"><span style=": ; font-size: 2; "><p align="left">Caused by:</p></span><p align="left" style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p align="left"><span style="color: #000080; font-size: 10pt; text-decoration: underline; ">java.util.ConcurrentModificationException</span><span style=": ; font-size: 2; "><p align="left">at java.util.HashMap$HashIterator.nextEntry(</p></span><p align="left" style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><span style="color: #000080; font-size: 10pt; text-decoration: underline; ">HashMap.java:793</span></p><p align="left"><span style="font-size: 10pt;">)<span style="font-size: 2; "><p align="left">at java.util.HashMap$KeyIterator.next(</p></span></span></p><p align="left" style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><span style="color: #000080; font-size: 10pt; text-decoration: underline; ">HashMap.java:828</span></p><p align="left"><span style="font-size: 10pt;">)<span style="font-size: 2; "><p align="left">at org.hibernate.collection.AbstractPersistentCollection$IteratorProxy.next(</p></span></span></p><p align="left" style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><span style="color: #000080; font-size: 10pt; text-decoration: underline; ">AbstractPersistentCollection.java:555</span></p><p align="left"><span style="font-size: 10pt;">)</span></p><p align="left" style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p align="left"><span style="font-size: 14pt; text-decoration: underline; ">java code (I am in open approveForm state)</span></p><p align="left" style="min-height: 8pt; height: 8pt; padding: 0px;"> </p></p></p><p align="left" style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p align="left" style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p align="left" style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p align="left" style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p align="left" style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p align="left" style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p align="left" style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p align="left" style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><span style="font-size: 10pt;"><p align="left"><span style="text-decoration: underline;">Collection</span> taskList = processInstance.getTaskMgmtInstance().getTaskInstances();</p><p align="left">Iterator<?> iter = taskList.iterator();</p><p align="left" style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><span style="font-size: 2; "><p align="left" style="min-height: 8pt; height: 8pt; padding: 0px;"> </p></span></span><p align="left" style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><strong style=": ; color: #7f0055; font-size: 10pt; ">while </strong><span style="font-size: 10pt;"> (iter.hasNext()) {<p align="left">       <span style="color: #ff0000;"> TaskInstance taskInstance = (TaskInstance) iter.next();</span></p><span style="font-size: 2; "><p align="left" style="min-height: 8pt; height: 8pt; padding: 0px;"> </p></span></span></p><p align="left" style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><strong style=": ; color: #7f0055; font-size: 10pt; ">        if</strong><span style="font-size: 10pt;"> (taskInstance.isOpen()) {<span style="font-size: 2; "><p align="left" style="min-height: 8pt; height: 8pt; padding: 0px;"> </p></span></span></p><p align="left" style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><span style=": ; font-size: 2; "><p align="left">               taskInstance.<strong>end</strong>(approve ?</p></span></p><p align="left"><span style="color: #2a00ff; font-size: 10pt; ">"yes"</span><span style="font-size: 10pt;"> <strong>:</strong></span><span style="color: #ff0000; font-size: 10pt; "><strong>"no"</strong></span><span style="font-size: 10pt;">);<p><p align="left">        }</p><p>}</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>......</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p></p><p align="left"><span style="font-size: 14pt; text-decoration: underline; ">process definition code</span></p><span style="font-size: 2; "><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p></span></span></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"><span id="_marker"> </span> </p><p><p><start-state name="start"><br/>  <transition to="submitForm"></transition><br/> </start-state></p></p><span style="font-size: 2; "><p><p><p><br/> <task-node name="<span style="color: #ff0000;"><strong>submitForm</strong></span>"><br/>  <task name="submitForm"><br/>   <assignment actor-id="submitter"></assignment><br/>  </task><br/>  <transition to="approveForm"></transition><br/> </task-node></p><p> <task-node name="approveForm"><br/>  <task name="approveForm"><br/>   <assignment actor-id="approver"></assignment><br/>  </task><br/>  <transition to="end" name="yes"></transition><br/>  <transition to="<strong style="color: #ff6600; ">submitForm</strong>" name="<strong style="color: #ff0000; ">no</strong>"></transition><br/> </task-node></p><p> <end-state name="end"><br/> </end-state></p></p></p></span></span></p><p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p></p></div>
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