Solution : https://service.sap.com/sap/support/notes/1152131 (SAP Service marketplace login required)
Key words : 
entire support package stack, execute operating system process, start instance <sid> <nn>, double stack reason, platform ibm system, restarted jspm recognizes, instance <nn>, start system, system start, process id
Related Notes : 
       
| 1097637 | IBM i: Copying an SAP kernel (kernel version 7.10/7.11/7.20) |