Query to find workflow logfile

 SELECT concurrent_queue_name manager, fcp.last_update_date, fcp.concurrent_process_id pid, meaning, fcp.logfile_name FROM fnd_concurrent_queues fcq, fnd_concurrent_processes fcp, fnd_lookups flkup WHERE concurrent_queue_name = 'WFALSNRSVC' AND fcq.concurrent_queue_id = fcp.concurrent_queue_id AND fcq.application_id = fcp.queue_application_id AND flkup.lookup_code=fcp.process_status_code  AND lookup_type ='CP_PROCESS_STATUS_CODE'  AND meaning='Active';