How to fix the Oracle error CLSGN-00066: Service advertisement initialization failed.?

In this post, you’ll learn more about the Oracle ErrorCLSGN-00066: Service advertisement initialization failed. with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

CLSGN-00066: Service advertisement initialization failed.

Reason for the Error CLSGN-00066: Service advertisement initialization failed.

GNS failed when tried to initialize the Resource Discovery subsystem.

How to fix the Error CLSGN-00066: Service advertisement initialization failed. ?

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

Examine the message following this one. It will indicate the cause. If it is a number, consult rdret.h.