Hi all,
I have the following process definition:

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

<process-definition name="forkWait">
 <start-state name="start">
 <task>
 <controller>
 <variable name="color" />
 <variable name="size" />
 </controller>
 </task>
 <transition name="toT1" to="task1"></transition>
 </start-state>
 <end-state name="end"></end-state>
 <node name="task1">
 <action name="action1" class="com.lumina.jbpm.tasks.Task1"></action>
 <transition name="toFork1" to="fork1"></transition>
 </node>
 <node name="task2">
 <action name="action2" class="com.lumina.jbpm.tasks.Task2"></action>
 <transition name="toJoin1" to="join1"></transition>
 </node>
 <node name="task3">
 <action name="action3" class="com.lumina.jbpm.tasks.Task3"></action>
 <transition name="toJoin1" to="join1"></transition>
 </node>
 <node name="Task5">
 <!-- <transition name="toEnd" to="end"></transition> -->
 <action class="com.lumina.jbpm.tasks.Task5"></action>
 <transition name="toend" to="end"></transition>
 </node>
 <fork name="fork1">
 <transition name="toEsperar1" to="esperar1"></transition>
 <transition name="toEsperar2" to="esperar2"></transition>
 </fork>
 <state name="esperar1">
 <transition name="toTask2" to="task2"></transition>
 </state>
 <state name="esperar2">
 <transition name="toTask3" to="task3"></transition>
 </state>
 <join name="join1">
 <transition name="toTask5" to="Task5"></transition>
 </join>
</process-definition>

1) I start the processInstance which runs until states "esperar1" and "esperar2" are reached.
2) Then I persist the processInstance and perform a jbpmSession.commitTransaction().
3) I recover the processInstance from the DB and signal on "toEsperar1" ( processInstance.findToken("/toEsperar1").signal() ) which makes "task2" to be executed and reach "join1" join node.
4) I persist the processInstance and perform a jbpmSession.commitTransaction().
5) After a while, I recover the processInstance from the DB and signal on "toEsperar2" ( processInstance.findToken("/toEsperar2").signal() ) which makes "task3" to be executed, reaching "join1" join node (now both tokens arrived to the join) and "task5" being executed.
6) Now I rollback the transaction by calling jbpmSession.rollbackTransaction().
7) I recover the processInstance from the DB and signal again on "toEsperar2" ( processInstance.findToken("/toEsperar2").signal() )

At this time, "task3" is NOT executed but "task5" executes normally.
My question is why "task3" is NOT executed if in 6) I rolled back to a step before it is executed?

Regards,
Juan Manuel