Oracle 10.2.0.5 -- ORA-600 [kpotcgah-7]

Problem

You have get the following errors on your database 

• On the Alert Log

ORA-00600: internal error code, arguments: [kpotcgah-7], [12534], [ORA-12534: TNS:operation not supported], [], [], [], [], []

• On accessing the scheduler

ORA-00600: internal error code, arguments: [kpotcgah-7], [12534], [ORA-12534: TNS:operation not supported], [], [], [], [], []
ORA-06512: at "SYS.DBMS_ISCHED", line 178
ORA-06512: at "SYS.DBMS_SCHEDULER", line 544

Solution

The problem is related to the misconfiguration of your wallet.

As a workaround comment all wallet related parameters in your sqlnet.ora file in your <oracle_home> or in a location to where TNS_ADMIN points.