How to fix the Oracle error TNS-02401: gbname string too long, allowed number characters?

In this post, you’ll learn more about the Oracle ErrorTNS-02401: gbname string too long, allowed number characters with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

TNS-02401: gbname string too long, allowed number characters

Reason for the Error TNS-02401: gbname string too long, allowed number characters

Cause: gbname or domain name too long.

How to fix the Error TNS-02401: gbname string too long, allowed number characters ?

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

Action: Check the gbname parameter in listener.ora, shorten it.