How to fix the Oracle error ORA-16817: unsynchronized fast-start failover configuration?

In this post, you’ll learn more about the Oracle ErrorORA-16817: unsynchronized fast-start failover configuration with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-16817: unsynchronized fast-start failover configuration

Reason for the Error ORA-16817: unsynchronized fast-start failover configuration

The fast-start failover target standby database was not synchronized with the primary database. As a result, a fast-start failover could not happen automatically in case of a primary database failure.

How to fix the Error ORA-16817: unsynchronized fast-start failover configuration ?

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

Ensure that the fast-start failover target standby database is running and that the primary database can ship redo data to it. When the standby database has received all of the redo data from the primary database, the primary and standby databases will then be synchronized. The Data Guard configuration may then fail over automatically to the standby database in the event of loss of the primary database.