How to fix the Oracle error DGM-16979: Unable to log on to the primary or standby database as SYSDBA?

In this post, you’ll learn more about the Oracle ErrorDGM-16979: Unable to log on to the primary or standby database as SYSDBA with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

DGM-16979: Unable to log on to the primary or standby database as SYSDBA

Reason for the Error DGM-16979: Unable to log on to the primary or standby database as SYSDBA

The username/password used by the observer to log on to the primary database and Fast-Start Failover target standby database does not have valid SYSDBA credentials.

How to fix the Error DGM-16979: Unable to log on to the primary or standby database as SYSDBA ?

You can fix this error in Oracle by following the below steps

Make sure the primary database and Fast-start failover target database are using a remote login password file. Make sure the SYSDBA password is the same at both databases and that the SYSDBA password is used in the CONNECT command. Start the observer again.