Oracle Solution for Error ora-16658

ORA-16658: unobserved fast-start failover configuration

What triggered the Error:

The fast-start failover configuration was currently unobserved so failover was disallowed.

What should we do to fix it:

Make sure the observer is running and has connectivity to both the primary and the target standby databases. Otherwise, disable fast-start failover to perform a failover in the absence of the observer process.