How to fix the Oracle error CLSGN-00152: Self-check failed.?

In this post, you’ll learn more about the Oracle ErrorCLSGN-00152: Self-check failed. with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

CLSGN-00152: Self-check failed.

Reason for the Error CLSGN-00152: Self-check failed.

The self-check performed by GNS at initialization time failed.

How to fix the Error CLSGN-00152: Self-check failed. ?

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

Check the accompanying exceptions and the log and trace files for details as to why it failed. Also verify that DNS has been configured so that it contains a “forwarders” clause which contains the domain used by GNS and the IP address on which the GNS server is listening.