I have this code:

Map<String,Object> variables = new HashMap<String,Object>();
variables.put("busLine", busLine);
executionService.startProcessInstanceByKey("helloWorld", variables);

and I have an org.jbpm.api.listener.EventListener with this code:

public void notify(EventListenerExecution execution) {
 boolean removed = execution.removeVariable("busLine");
}

with this process definition:

<process name="helloWorld" xmlns="http://jbpm.org/4.0/jpdl">
 <start g="16,22,80,40">
 <transition to="printHelloWorld" />
 </start>

 <java expr="#{busLineService}" g="166,24,138,40" method="save2"
 name="printHelloWorld">
 <arg>
 <object expr="#{busLine}" />
 </arg>
 <on event="end">
 <event-listener class="br.com.acttive.wicketjbpm.workflow.WorkflowListener">
 </event-listener>
 </on>
 <transition name="to state1" to="state1" g="-49,-18" />
 </java>

 <state name="state1" g="287,158,92,52">
 <transition name="to end1" to="end1" g="-42,-18" />
 </state>

 <end g="422,18,48,48" name="end1" />
</process>

where busLine is an entity synchronized with hibernate and I'm not beeing able to remove this variable from the jbpm4_variable table.

Anyone knows why this happens?