JBPM 4.4: Avoid job retry on optimistic lock failure after join

[h4rlock]

Hello, in the following process foo.MyClass is quite slow. The parallel branch reach the Join1 before Custom1 (MyClass) complete. After the join node the Custom1 task complete his job without errors, but I gets an optimistic lock failure when jbpm try to update the Execution:

- org.hibernate.StaleObjectStateException: Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect): [org.jbpm.pvm.internal.model.ExecutionImpl#20102428]

The RetryInterceptor catch the exception and relaunch Custom1 with a subsequent re-execuotion of MyClass code. How can avoid this behavior?

Thank you

Marco

<?xml version="1.0" encoding="UTF-8" standalone="no"?>

<process xmlns="http://jbpm.org/4.4/jpdl" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" name="afterTimerJoin" xsi:schemaLocation="http://jbpm.org/4.4/jpdl jpdl-4.4.xsd">

  <start g="137,247,34,34" name="Start1">

    <transition g="0,0" name="to Fork1" to="Fork1"/>

  </start>

  <fork g="271,260,34,34" name="Fork1">

    <transition g="0,0" name="to State1" to="State1"/>

    <transition g="0,0" name="to Fork2" to="Fork2"/>

  </fork>

  <state g="361,85,101,50" name="State1">

    <transition g="0,0" name="to State2" to="afterTimer">

      <timer duedate="3 minutes"/>

    </transition>

  </state>

  <task g="556,281,101,50" name="Task1" swimlane="TEST">

    <transition g="0,0" name="to Join1" to="Join1"/>

  </task>

  <swimlane assignee="TEST" name="TEST"/>

  <fork g="437,266,34,34" name="Fork2">

    <transition g="0,0" name="to Task1" to="Task1"/>

    <transition g="0,0" name="to Custom1" to="Custom1"/>

  </fork>

  <custom class="foo.MyClass" continue="async" g="465,178,101,50" name="Custom1">

    <transition g="0,0" name="to End1" to="End1"/>

  </custom>

  <end ends="execution" g="625,191,34,34" name="End1"/>

  <join g="886,185,34,34" multiplicity="1" name="Join1" >

    <transition g="0,0" name="to Task2" to="Task2"/>

  </join>

  <task g="1007,210,101,50" name="Task2" swimlane="TEST">

    <transition g="0,0" name="to End2" to="End2"/>

  </task>

  <end g="1152,245,34,34" name="End2"/>

  <task g="669,90,101,50" name="afterTimer" swimlane="TEST">

    <transition g="0,0" name="to Join1" to="Join1"/>

  </task>

</process>