ORA-38853
        cannot mark instance string (redo thread string) as disabled
        
        
        Cause
        The standby switchover or failover operation failed because it needs to mark an instance (redo thread) as disabled. That instance was up, which prevented it from being disabled.
        Action
        Shut down the specified instance and retry this command.
        
     
    
    
        ORA-38853
        cannot mark instance string (redo thread string) as disabled
        
        
        Cause
        The standby switchover or failover operation failed because it needs to mark an instance (redo thread) as disabled. That instance was up, which prevented it from being disabled.
        Action
        Shut down the specified instance and retry this command.
        
     
    
    
        ORA-38853
        cannot mark instance string (redo thread string) as disabled
        
        
        Cause
        The standby switchover or failover operation failed because it needs to mark an instance (redo thread) as disabled. That instance was up, which prevented it from being disabled.
        Action
        Shut down the specified instance and retry this command.