ORA-00600: internal error code, arguments: [510], [0xnnnnnnnn], [threshold alerts latch], [], []

We have found below error in alert.log for Oracle Database version 10.2.0.4

ORA-00600: internal error code, arguments: [510], [0x060030070], [threshold alerts latch], [], [], [], [], [] 

We never saw this error before and the only change that we applied on the server is OEM agent installation.

During the troubleshooting I found that these errors might occur after adding alerts for threshold values on tablespaces and faulty threshold/alert causing the MMON process to fail at the moment the thresholds were checked.

Find thresholds defined on the database
SQL>select dbms_server_alert.view_thresholds from dual;

I found many thresholds in the database and I have cleared all unnecessary thresholds. After removing the thresholds I didn’t see the error in the alert.log, it looks like the issue has been fixed.

I found that this is a known bug 5727166 and fixed in 10.2.0.5 and 11.2.0.1 and affected Oracle versions are 10.2.0.2 to 11.2.0.7 and the issue.

Hope this helps.

Regards,
Satishbabu Gunukula, Oracle ACE
http://www.oracleracexpert.com