How to fix the Oracle error CRS-01609: This node is unable to communicate with other nodes in the cluster and is going down to preserve cluster integrity; details at string in string.?

In this post, you’ll learn more about the Oracle ErrorCRS-01609: This node is unable to communicate with other nodes in the cluster and is going down to preserve cluster integrity; 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-01609: This node is unable to communicate with other nodes in the cluster and is going down to preserve cluster integrity; details at string in string.

Reason for the Error CRS-01609: This node is unable to communicate with other nodes in the cluster and is going down to preserve cluster integrity; details at string in string.

Cause: Communication was lost with some nodes of the cluster and this node detected that another sub-cluster was designated to be the surviving sub-cluster. This node went down to preserve data integrity.

How to fix the Error CRS-01609: This node is unable to communicate with other nodes in the cluster and is going down to preserve cluster integrity; details at string in string. ?

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

Action: Verify all network connections between cluster nodes and repair any problematic connections. If there do not appear to be any network problems,

1. collect the CSS daemon logs, system messages and any CSS daemon core files from all nodes and

2. contact Oracle Support.