1.环境描述

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ORACLE 12CR1

RHEL 7.0

2.操作过程

switchover to xxx 报错，过程如下：

$dgmgrl /
DGMGRL for Linux: Version 12.1.0.2.0 - 64bit Production

Copyright (c) 2000, 2013, Oracle. All rights reserved.

Welcome to DGMGRL, type "help" for information.
Connected as SYSDG.
DGMGRL> show configuration;

Configuration - dg_config

 Protection Mode: MaxAvailability
 Members:
 orcl  - Primary database
   orcldg - Physical standby database

Fast-Start Failover: DISABLED

Configuration Status:
SUCCESS  (status updated 14 seconds ago)

DGMGRL> validate database orcl;

 Database Role:   Primary database

 Ready for Switchover: Yes

DGMGRL> validate database orcldg;

 Database Role:    Physical standby database
 Primary Database: orcl

 Ready for Switchover: Yes
 Ready for Failover:   Yes (Primary Running)

DGMGRL> switchover to orcldg;
Performing switchover NOW, please wait...
New primary database "orcldg" is opening...
Oracle Clusterware is restarting database "orcl" ...
ORA-01017: invalid username/password; logon denied

Warning: You are no longer connected to ORACLE.

       shut down instance "orcl" of database "orcl"
       start up instance "orcl" of database "orcl"

DGMGRL>
DGMGRL> connect sys/oracle@orcl
Connected as SYSDBA.
DGMGRL> switchover to orcldg;
Performing switchover NOW, please wait...
Error: ORA-16558: database specified for switchover is not a standby database

Failed.
Unable to switchover, primary database is still "orcldg"
DGMGRL> switchover to orcl;
Performing switchover NOW, please wait...
New primary database "orcl" is opening...
Oracle Clusterware is restarting database "orcldg" ...
Switchover succeeded, new primary is "orcl"
DGMGRL>

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本文题目：switchovertoxxx犯的低级错误-创新互联
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