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Hi HuiSheng,

The simplified process definition is:

<process name="TimerTest" xmlns="http://jbpm.org/4.3/jpdl">
   <start g="185,63,48,48" name="start">
      <transition g="-44,-18" name="to task1" to="task1"/>
   </start>
   <task g="162,161,92,52" name="task1" candidate-groups="sales-support">
      <transition g="-43,-18" name="to state" to="state"/>
   </task>
   <state g="162,232,92,52" name="state">
      <on event="timeout">
      <timer duedate="1 minute" repeat="1 minute"/>
         <event-listener class="mytest.TimerTest">
            <property name="successTransition">
               <string value="toTask"/>
            </property>
         </event-listener>
      </on>
      <transition g="-44,-18" name="toTask" to="task"/>
   </state>
   <task g="162,320,92,52" name="task" candidate-groups="sales-support">
      <transition g="-42,-18" name="to end1" to="end"/>
   </task>
   <end g="183,410,48,48" name="end"/>
</process>

and the simplified event handler where we signal the execution is:

public class TimerTest implements EventListener {
    static int cnt = 0;
    private String successTransition;
   
    public String getSuccessTransition() {
        return successTransition;
    }

    public void setSuccessTransition(String successTransition) {
        this.successTransition = successTransition;
    }

    public void notify(EventListenerExecution execution) throws Exception {
        cnt++;
        if (cnt > 2) {
            progress(execution);
        }
    }

    public void progress(EventListenerExecution prmEventListenerExecution) {
        org.jbpm.api.Configuration.getProcessEngine().getExecutionService().signalExecutionById(prmEventListenerExecution.getId(), successTransition);
    }

}