How to fix the Oracle error ORA-12321: database (link name string) is not open and AUTO_MOUNTING=FALSE?

In this post, you’ll learn more about the Oracle ErrorORA-12321: database (link name string) is not open and AUTO_MOUNTING=FALSE with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-12321: database (link name string) is not open and AUTO_MOUNTING=FALSE

Reason for the Error ORA-12321: database (link name string) is not open and AUTO_MOUNTING=FALSE

The secondary database that your instance is attempting to mount is not open and automatic mounting has not been enabled.

How to fix the Error ORA-12321: database (link name string) is not open and AUTO_MOUNTING=FALSE ?

You can fix this error in Oracle by following the below steps

Manually mount and open the secondary database using ALTER DATABASE with the OPEN and MOUNT options. Alternately, to allow your instance to automatically mount and open secondary databases, set the AUTO_MOUNTING parameter in the parameter file to TRUE.