In this post, you’ll learn more about the Oracle ErrorORA-12319: database (link name string) is already open with the details on why you receive this error and the possible solution to fix it.
Oracle Error Description
ORA-12319: database (link name string) is already open
Reason for the Error ORA-12319: database (link name string) is already open
You are attempting to open a secondary database that is already open.
How to fix the Error ORA-12319: database (link name string) is already open ?
You can fix this error in Oracle by following the below steps
The database is open and you need not take additional action to establish access.