How to fix the Oracle error CRS-04402: The CSS daemon was started in exclusive mode but found an active CSS daemon on node string, number string, and is terminating?

In this post, you’ll learn more about the Oracle ErrorCRS-04402: The CSS daemon was started in exclusive mode but found an active CSS daemon on node string, number string, and is terminating with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

CRS-04402: The CSS daemon was started in exclusive mode but found an active CSS daemon on node string, number string, and is terminating

Reason for the Error CRS-04402: The CSS daemon was started in exclusive mode but found an active CSS daemon on node string, number string, and is terminating

Cause: The CSS daemon was started in exclusive mode, which requires that the clusterware stack is down on all other nodes to ensure data integrity. A CSS daemon was detected on another node, so the CSS daemon on this node is terminating.

How to fix the Error CRS-04402: The CSS daemon was started in exclusive mode but found an active CSS daemon on node string, number string, and is terminating ?

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

Action: is required, otherwise stop the Oracle clusterware stack that is running on the indicated node. The name and number of the active node may be unknown.