How to fix the Oracle error CLSGN-00154: Invalid subdomain: “string”?

In this post, you’ll learn more about the Oracle ErrorCLSGN-00154: Invalid subdomain: “string” with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

CLSGN-00154: Invalid subdomain: “string”

Reason for the Error CLSGN-00154: Invalid subdomain: “string”

The name of the subdomain does not conform to Internet standards. It must meet the following requirments:

1. Only alphanumeric characters, periods are hyphens are allowed;

2. It must start and end with an alphanumeric character;

3. Consecutive periods are not allowed. In addition, the subdomain must not end with with “.local” as it is reserved for multicast DNS.

How to fix the Error CLSGN-00154: Invalid subdomain: “string” ?

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

Specify a subdomain in the correct format.