ORA-00600 [2663], [12], ....

After not having spotted ORA-00600 for a while a new one showed up.

ORA-00600: internal error code, arguments: [2663], [12], [3665664941], [12], [3884717804], [], [], [], [], [], [], []


This happened out of the blue after a switchover back from a Datagurad environment.  Basically this is due to a bug, the patch is already included in 11.2.0.2.0 and 11.2.0.3.0 patch sets, but it is not enabled by default, it is activated after setting a parameter in the spfile (pfile) parameter file.


alter system set "_ktb_debug_flags"=8 ;

Fixed.