ORA-600[784], ORA-600[ktuclu:badlatch2], ORA-7445[kggchk] Errors Crash The Database Instance (Doc ID 1267731.1)

Last updated on FEBRUARY 07, 2014

Applies to:

Oracle Database - Enterprise Edition - Version 9.2.0.8 to 11.2.0.1 [Release 9.2 to 11.2]
Information in this document applies to any platform.

Symptoms

The following errors may be seen in the alert log:
     ORA-00600: internal error code, arguments: [784]
     ORA-00600: internal error code, arguments: [ktuclu:badlatch2]
     ORA-7445: exception encountered: core dump [kggchk]

The call stack for the ora-600[784] error can look like this:
     ksmdfr  ktu_remove_arsp  ktumof  ktmmon

The following message may be seen in the trace file which indicates that an orphaned undo segment has been identified:
     Found orphan usn

These errors can result in instance termination.

Cause

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