sounds like it's time for a SR im afraid here
The ORA-600 codes of 2022 does not show up in the Metalink ORA-600 discovery tool. I do, however, get the following message in the alert log: Error 600 encountered while recovering transaction on (1,83) on object 22284. The DB has been bounced since this started. It opened cleanly but then started a new smon trace file with the exact same messages.