How to fix the Oracle error CRS-04405: The following nodes are unknown to Oracle High Availability Services: string?

In this post, you’ll learn more about the Oracle ErrorCRS-04405: The following nodes are unknown to Oracle High Availability Services: string with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

CRS-04405: The following nodes are unknown to Oracle High Availability Services: string

Reason for the Error CRS-04405: The following nodes are unknown to Oracle High Availability Services: string

Cause: The local Oracle High Availability Services is not in contact with Oracle High Availability Services on the specified nodes.

How to fix the Error CRS-04405: The following nodes are unknown to Oracle High Availability Services: string ?

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

Action: Check if the nodes are online and Oracle High Availability Services is running. Check for communications problems and consider issuing the command locally on the specified node(s).