Solution : https://service.sap.com/sap/support/notes/966758 (SAP Service marketplace login required)
Key words : 
competitor add entry materia, r3ad queue reason, missing customizing entry, customizing entry, entry object, /3 outbound queue, request download, object material, queues r3ad_, state stop
Related Notes : 
       
| 872533 | FAQ: Middleware |