Ora 600

When my app connects to the database through weblogic I am getting the
ORA-00600: internal error code, arguments: [ttcgcshnd-1], [0], [], [], [], [], [], [];

I checked the trace files generated I get the following :

*** SESSION ID:(12.2234) 2002-05-29 09:35:26.181
*** 2002-05-29 09:35:26.181
ksedmp: internal or fatal error
ORA-00600: internal error code, arguments: [ttcgcshnd-1], [0], [], [], [], [], [
], []
Current SQL statement for this session:
SELECT VALUE FROM NLS_INSTANCE_PARAMETERS WHERE PARAMETER ='NLS_DATE_FORMAT'

Any ideas whats happening?