Solution : https://service.sap.com/sap/support/notes/393620 (SAP Service marketplace login required)
Key words : 
rc = -2 log by2=>sql error -1     performing con [dblink#4 @ 419] log by0=><message text, /usr/sap/<sid>/sys/exe/run/startdb[356], rc = -1 error => oci-call 'ocierrorget' failed, error => oci-call 'ociinitialize' failed, user sidewhen calling sqlplus / svrmgrl, %oracle_home%\ocommon\nls\admin\data, starting service oracle<instance>agentcould, character conversionsqlplus / svrmgrl hang, -task communication protocol errorora-24365, storage control block adress
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| 374755 | Installation of the ORACLE Client Software 8.0.X | 
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| 180430 | Installing the ORACLE client software for UNIX | 
| 121004 | ORA-1019 for Connect to an Oracle database |