I try to use this query but there's a problem with the condition token.parent is not null, because if the token is the root token the parent is null... I don't understand why this condition is in the query.
I think a select DISTINCT node is also needed.
<query name="GraphSession.findActiveNodesByProcessInstance">
<![CDATA[
select node
from org.jbpm.graph.def.Node node,
org.jbpm.graph.exe.Token token,
org.jbpm.graph.exe.ProcessInstance processInstance
where token.processInstance = :processInstance
and token.node = node
and token.isSuspended != true
and token.parent is not null
and token.end is null
]]>
</query>
