Cluster Message

Hello Lucas,
I'm Titus, here to assist you with your query on the Microsoft Q&A forums.
It looks like you're dealing with a Failover Cluster issue, where one of the nodes isn't functioning as expected. The error message you're seeing indicates that a cluster resource does not have all nodes listed as “Possible Owners.”

What does this error mean?

In a Failover Cluster, each resource (such as a virtual machine, disk, or service) must be assigned to one or more nodes that are allowed to host it. These nodes are called Possible Owners. If a resource is missing one or more nodes in its Possible Owners list, it cannot fail over to those nodes during a failure or maintenance event. This limits the cluster’s ability to maintain high availability and can cause the resource to fail to start or move properly.

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Best regards,
Titus.

Hi Lucas,

1. Yes, it is possible to disconnect a node from the cluster and reconnect it later. This is typically done using the Evict and Add Node options in Failover Cluster Manager.
2. And yes, the remaining active node will continue to provide service—as long as:

• All clustered roles and resources are assigned to it as Possible Owners.
• The SQL Server AlwaysOn primary replica is hosted on that active node.
• All required services are running and healthy.

Just keep in mind that during this time, high availability is temporarily lost, so if the active node fails, there will be no automatic failover.

Best regards,
Titus.