Solution : https://service.sap.com/sap/support/notes/928898 (SAP Service marketplace login required)
Key words : 
gateway926556 ha polling interface, gateway926355 report edoc_check_webdav_connection fails, mdm926556 ha polling interface, enqueue replication928635 cpu info, client/server technology area, enqueue replication928636 http debugging, sm50928636 http debugging, debugger928637 enqueue replication, terms disp+work, sap web dispatcher
Related Notes : 
       
| 928637 | Enqueue replication not possible due to connection problem | 
| 926355 | Report EDOC_CHECK_WEBDAV_CONNECTION fails in MDM | 
| 926311 | Security-related changes in the gateway | 
| 924960 | Application statistics cannot be read | 
| 923248 | Delete all registered programs with the same name | 
| 922442 | *** ERROR => NiIShutdownHandle: SiShutdown failed | 
| 922201 | Message server terminates after MS_DUMP_ALL_CLIENTS | 
| 851852 | ICM Patch Collection (7.00) | 
| 698017 | ICM Patch Collection (6.40) |