Friday, October 12, 2012

ORA-16649: possible failover to another database prevents this database from being opened


We have two node primary & standby RAC. It is in sync and i have to split the primary database & standby database.

I have shutdown the primary database and went to the standby database server.
I logged in as DGMGRL and performed a fail over to the standby. Now the standby database become a primary database. Once i complete the failover; i have disabled the DG configuration using the DG broker.

When i try to started the old primary which i have shutdown before performing a failover to the standby. I got a error message saying  “ORA-16649: possible failover to another database prevents this database from being opened”

SQL> startup force
ORA-32004: obsolete or deprecated parameter(s) specified for RDBMS instance
ORACLE instance started.
Total System Global Area 7.2958E+10 bytes
Fixed Size                  2235808 bytes
Variable Size            1.9059E+10 bytes
Database Buffers         5.3687E+10 bytes
Redo Buffers              209866752 bytes
Database mounted.
ORA-16649: possible failover to another database prevents this database from being opened

WHEN I CHECKED THE DB ROLE; it is primary
SQL> select database_role from v$database;
DATABASE_ROLE
----------------
PRIMARY

Then i managed to find that database control file get the information from the DG broker config file. So i have disable the config file on the primary database.

SQL> alter system set dg_broker_start=false scope=both sid='*';

System altered.

-         After disabling the DG broker; i can able to open the database without any issue.
SQL> alter database open;
Database altered.

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