Oracle Message ORA-16830 - primary isolated from fast-start failover partners longer than FastStartFailoverThreshold seconds: shutting down

ERRORprimary isolated from fast-start failover partners longer than FastStartFailoverThreshold seconds: shutting down
CAUSEThe primary database was isolated from both the observer and target standby database for longer than the seconds specified by the FastStartFailoverThreshold property. A fast-start failover probably occurred. If the FastStartFailoverPmyShutdown configuration property was set to TRUE, the broker will shut down the primary database in this situation.
ACTIONEnsure one instance of this database is running and the database is mounted on that instance so that the broker may reinstate the old primary database.