When connecting to dataguard broker and disabling database with ORACLE_SID set before connecting to broker, broker becomes inaccessible, which is shown below:

Login to broker via database ila:


oracle [ILA@p03] /u01/app/oracle/product/11.2.0.4/dbhome_1/dbs : dgmgrl /
DGMGRL for Linux: Version 11.2.0.4.0 - 64bit Production

Copyright (c) 2000, 2009, Oracle. All rights reserved.

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

Configuration - ila

Protection Mode: MaxAvailability
Databases:
ILAP - Primary database
ila - Physical standby database
ilal - Logical standby database

Fast-Start Failover: DISABLED

Configuration Status:
SUCCESS

Disable database ila in broker:


DGMGRL> disable database ila;
Disabled.

Now neither enabling nor showing configuration is possible any more:


DGMGRL> enable database ila;
ORA-16541: database is not enabled

Configuration details cannot be determined by DGMGRL
DGMGRL> show configuration;
ORA-16541: database is not enabled

Configuration details cannot be determined by DGMGRL
DGMGRL> exit

Solution: You have to connect to broker via a database which is enabled.

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Oracle Team