Description:This error is generally seen while processing a process instance, whose starter is no longer a BPM resource.
Symptoms:
An error similar to below is seen in the BPM logs -
"Unable to identify the user making a service request. [DCE7502C-8806-486F-A02D-B97D9FB19732,resolveResource]"
where DCE7502C-8806-486F-A02D-B97D9FB19732 - is the GUID of the deleted user
This error implies the following query has returned no results -
select * from de_resource where guid='DCE7502C-8806-486F-A02D-B97D9FB19732'
Cause:Each process instance is assigned a principal, who is the process starter. A process starter must always exist on the system for a process instance to be completed successfully. If the user who is a principal of some process instances is deleted, then these process instances will fail to progress with the error mentioned in this KB article.