How to fix the Oracle error CRS-01636: The CSS daemon was started in exclusive mode but found an active CSS daemon on node string and is terminating; details at string in string?

In this post, you’ll learn more about the Oracle ErrorCRS-01636: The CSS daemon was started in exclusive mode but found an active CSS daemon on node string and is terminating; details at string in string with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

CRS-01636: The CSS daemon was started in exclusive mode but found an active CSS daemon on node string and is terminating; details at string in string

Reason for the Error CRS-01636: The CSS daemon was started in exclusive mode but found an active CSS daemon on node string and is terminating; details at string in string

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-01636: The CSS daemon was started in exclusive mode but found an active CSS daemon on node string and is terminating; details at string in string ?

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

Action: Stop the Oracle clusterware stack that is running on the indicated node.