ORA-16820: fast-start failover observer is no longer observing this database

ORA-16820: fast-start failover observer is no longer observing this databas

Solution:
check:

DGMGRL> SHOW DATABASE VERBOSE shark  
(for sharkstd(standby) also)

Properties:
DGConnectIdentifier = ‘shark’

and


Properties:
DGConnectIdentifier = ‘sharkstd’

STARTING OBSERVER IN BACKGROUND MODE

dgmgrl -logfile /tmp/observer.log sys/password@sharkstd “start observer”

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