Solution : https://service.sap.com/sap/support/notes/1476502 (SAP Service marketplace login required)
Key words : 
active secure network communication, secure network communication, code page layer, code page converter, abap application server, terms taskhandler, rscp reason, individual cases, consumes resources, initialized correctly
Related Notes : 
       
| 1266393 | Code page converter cache always 6.000.000 bytes? |