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ORA-600[kccsbck_first]: What to Check (Doc ID 157536.1)

Last updated on SEPTEMBER 01, 2023

Applies to:

Oracle Database - Standard Edition
Oracle Database - Personal Edition
Oracle Database - Enterprise Edition - Version to [Release 8.0.3 to 11.2]
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Information in this document applies to any platform.


This article helps to resolve problems with the error ORA-600[kccsbck_first] after having read:

     ORA-600 [kccsbck_first] (<Note 139013.1>)



The ORA-600[kccsbck_first] error occurs when Oracle detects that another instance
has this database already mounted. For some reason, Oracle already sees a thread
with a heartbeat. This could be the expected behavior if running OPS. In such a
case the parallel_server parameter needs to be set. In cases where Parallel Server
is not linked in, this is not the expected behavior.

In special cases this error can be raised due to one or more corrupt


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