ORA-00600: internal error code, arguments: [kccsbck_first], , , , , , , , , , , 
Unexpected server reboot.
the system messages file, we can see that at the same time the
instances fail to mount, there are several errors reported at OS level.
Aug 2116:30:04 ….sis_agent_syncml: [WARNING] “SQL Server: Native
Error: No SQL-Server connection available. bind() failed [master pool],
connections in use: 1” “-” “-“