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

In this post, you’ll learn more about the Oracle ErrorTNS-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

TNS-12597: TNS:connect descriptor already in use

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

Cause: Internal error – illegal use of connect descriptor.

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

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

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