Solution : https://service.sap.com/sap/support/notes/442478 (SAP Service marketplace login required)
Key words :
call transactional remote function call, rfc-enabled function modules qdest_register, directory /general/r3server/abap/note, registered external trfc/qrfc server program, queued remote function call, profile parameter abap/arfcrstate_col_delete, existing function group arfc, existing function modules trfc_qout_get_hanging_queues, asynchronous remote function call, occupied registered rfc servers
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| 460235 | tRFC/qRFC: Low-speed processing |
| 459199 | Measures during the Euro currency conversion |
| 456507 | Status STARTING in SMQS (QOUT Scheduler) |
| 440735 | Unnecessary queue dependencies in APO outbound processing |
| 438015 | Latest qRFC version and supplement for 3.x, 4.x, 6.10, 6.20 |
| 400330 | Outbound Scheduler/qOUT Scheduler |
| 366869 | HOLD/EXECUTED/WCONFIRM entries in ARFCRSTATE |
| 216364 | Blocked queue / No update to external tax system |
| 74141 | Resource Management for tRFC and aRFC |