Race condition in a workflow

[David Martínez González]

I think this could help you,     http://help.sap.com/saphelp_sm32/helpdata/en/83/8b973945bfa500e10000000a114084/content.htm
 
specifically (2  c.)  triggering event and a check funtion module to filter document type,
 
Regards,
 
David M.

________________________________

De: sap-wug-bounces at mit.edu [mailto:sap-wug-bounces at mit.edu] En nombre de Joe_Toledo at capgroup.com
Enviado el: Miércoles, 10 de Noviembre de 2010 08:38 a.m.
Para: SAP Workflow Users' Group
Asunto: Re: Race condition in a workflow


Good morning, 

Perhaps you've already considered this, but since the approval workflow requires that the image be linked first then: 

- have the approval workflow be a continuation of the archivelink workflow (i.e. a sub-flow) 
- or have the first workflow (image link) raise an event at the completion of that workflow and have the approval workflow wait for that event before it continues. 

I hope this helps. 

Regards, 

Joe Toledo <mailto:Joe_Toledo at capgroup.com>  | The Capital Group Companies
Location: IRV | Extension: 55417 | Outside: 949-975-5417
E-mail: joat at capgroup.com
[ Mailing: 15260 Valley Oak. <http://maps.yahoo.com/py/maps.py?BFCat=&Pyt=Tmap&newFL=Use+Address+Below&addr=15260+Valley+Oak.&csz=92618&Country=us&Get%A0Map=Get+Map>  IRV-M-3E Irvine, CA 92618 USA ]




From: 	michael.mcley at daimler.com 
To: 	sap-wug at mit.edu 
Date: 	11/10/2010 06:28 AM 
Subject: 	Race condition in a workflow 
Sent by: 	sap-wug-bounces at mit.edu

________________________________





Wuggers,

I have set up a new workflow for the approval of parked invoices.  Only invoices for specific types of purchase orders (service) get parked for approval.  It seems I have a race condition that was not detected during user testing.  The race is between the start of the approval workflow and the scanned document association with the SAP invoice.  Some more details...

1. When an invoice for a service PO arrives, 2 processes are kicked off simultaneously:
a) the invoice approval workflow
b) the association of the scanned document (archivelink) with the SAP invoice object.
2. Sometimes the scanned document association completes first, in which case an entry in the AdHoc objects container item is made, and a hyperlink to the scanned document appears in the subesquent work items in the invoice approval workflow.  
3. Other times the approval workflow starts before the association completes and no scanned documents are found -> no hyperlink in the work items.
4. The approvers require the link to the scanned document so they can review the vendor invoice before approval.

I was wondering if anyone else has seen a similar problem and what was done to correct.  Some things I thought about:
1. Triggering the workflow off the BUS2089.ASSIGNED event (this event is generated when an association is made between the archivelink document and the SAP object) - this probably is not a good idea as all invoices generate this event, but not all invoices go thru the approval workflow.
2. Including a wait step for the BUS2089.ASSIGNED event - probably not a good idea as the workflow could hang in those cases where this event is already generated when the approval workflow starts
3. Create a loop to test the adhoc objects container element for entries and loop until there is one - this would probably work, but it seems a little, well..., kludgey.

Can anyone give me some advice on correcting this issue?  Your help is appreciated.



Michael McLey
MBUSI - IT Parts & Administration 
Mercedes-Benz US International, Inc.
1 Mercedes Drive 
Vance, AL 35490 
PHONE:  (205) 462 - 5239 
EMAIL:   michael.mcley at daimler.com   
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