Solution : https://service.sap.com/sap/support/notes/444261 (SAP Service marketplace login required)
Key words :
affected qrfc-luw locks, error message rsqu 031, short text 'error, affected bw system, hanging mcexnn queue, entire qrfc queue, canceled update requests, mcexnn extraction queue, qrfc queue, update requests
Related Notes :
| 728687 | Delta queued: No data in RSA7 |
| 480145 | BW extraction call for application 04 in the background |
| 448489 | EBP 20b-30: Calling RSC1_TRFC_QUEUE_WRITE in update task |
| 440822 | Composite SAP note BW-SAPI 30A Patch 6 |
| 417189 | BW/SAPLEINS - Online update of delta queue |