How to fix the Oracle error ORA-12597: TNS:connect descriptor already in use?

In this post, you’ll learn more about the Oracle ErrorORA-12597: TNS:connect descriptor already in use with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-12597: TNS:connect descriptor already in use

Reason for the Error ORA-12597: TNS:connect descriptor already in use

Internal error – illegal use of connect descriptor.

How to fix the Error ORA-12597: TNS:connect descriptor already in use ?

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

Not normally visible to the user. For further details, turn on tracing and reexecute the operation. If error persists, contact Oracle Customer Support.