How to fix the Oracle error PRVF-05823: Name lookup for FDQN “{0}” failed?

In this post, you’ll learn more about the Oracle ErrorPRVF-05823: Name lookup for FDQN “{0}” failed with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

PRVF-05823: Name lookup for FDQN “{0}” failed

Reason for the Error PRVF-05823: Name lookup for FDQN “{0}” failed

Cause: An attempt to query DNS servers for FDQN specified failed.

How to fix the Error PRVF-05823: Name lookup for FDQN “{0}” failed ?

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

Action: Make sure that there are no firewalls between the local node and the DNS. Make sure that there are no firewalls between DNS and the node on which ‘cluvfy comp dns -server’ was run. Make sure that GNS subdomain delegation was setup correctly in the DNS. Also look at any error messages on the node on which ‘cluvfy comp dns -server’ was run.