[rules-users] Drools Flow Persistence throws stack overflow error

[PremKumar s]

Hi,



      I am evaluating the drools expert with drool flow using TimeManagement
System. I am inserting the process instance into working memory of drools
[session.insert(workflowProcessInstance)]  So that the rules can use the
process instance as part of Rule constraints to enable the rules to make
more sophisticated decisions based on the state of the current process
instance.



Rule snippet



rule "Submit Time"  ruleflow-group "Submit Time"
       dialect "java"
       when

               processInstance:WorkflowProcessInstance()

               tkRequest:TKRequest ()
               tkRequestDAO:TKRequestDAO()
       then

                    // check the current processInstance state as Active
then do that

                       //Do custom operation, status change, persistence
update

       end



       The approach is works fine with using
KnowledgeBuilder.newStatefulKnowledgeSession() that is no persistence.  But
once i have enabled the Persistence using
JPAKnowledgeService.newStatefulKnowledgeSession(know, null,
getEnvironment())  it throws stack over flow error due the
workflowProcessInstance is not serialized while trying to persist the newly
added workflowProcessInstance  to working memory.



           Once i have commented the session.insert(workflowProcessInstance)
the stack overflow error is gone but none of my rules are not executed.



Can some one provide guidance on how to pass this workflowProcessInstance to
rule constriant with persistence JPAKnowledgeSession enabled.



Thanks

Prem
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