Solution : https://service.sap.com/sap/support/notes/1097928 (SAP Service marketplace login required)
Key words : 
/usr/sap/<sid>/<instanceid>/j2ee/jspm/log/slcontroller/server, /usr/sap/<sid>/<instanceid>/j2ee/jspm/param directory, /usr/sap/<sid>/<instanceid>/j2ee/jspm/server directory, /usr/sap/<sid>/< instanceid>/j2ee/jspm/server directory, started- sdt server starts sdt gui, - jspm starts- sdt server, host <hostname> & port <portnumber>, -----------------------------------               /dialog/sdtserverconnection/port = jspm_port               ----------------------------------- 4, -----------------------------------               <serversettings>                    <serverport> sdt_server_port_value</serverport>               ----------------------------------- 2, </httpmode>                   <httpport>    sdt_server_http_port_value    </httpport>               ----------------------------------- 3
Related Notes : 
       
| 1443834 | Central SAP Note JSPM 7.2 | 
| 1147119 | Central SAP Note JSPM 7.1 | 
| 1084330 | ByDesign Live Update Trouble Shooting Guide |