Windows error 5939 (ERROR_CLUSTER_EVICT_INVALID

Status / error code:		Category:

Constant name:
Source:		Operating System:
Description: Eviction of this node is invalid at this time. Due to quorum requirements node eviction will result in cluster shutdown. If it is the last node in the cluster, destroy cluster command should be used.

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ERROR_FILE_SHARE_RESOURCE_CONFLICT	ERROR_CLUSTER_SINGLETON_RESOURCE

ERROR_CLUSTER_EVICT_INVALID_REQUEST

ERROR_CLUSTER_EVICT_INVALID_REQUEST means evicting the selected node would violate quorum requirements or is otherwise invalid in the current cluster state. Removing the last usable node is not a normal eviction scenario.

What to check

Check quorum, witness, and node state before any eviction.
If this is disaster recovery, follow the documented cluster recovery process rather than repeatedly retrying eviction.
For planned maintenance, drain or move workloads and preserve quorum before removing the node.

Get-ClusterQuorum
Get-ClusterNode | Format-Table Name, State, NodeWeight, DynamicWeight

Microsoft: Quorum witness

Microsoft: Deploy a quorum witness

Microsoft: Move-ClusterGroup

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