What does Windows error code 5065 (ERROR_CLUSTER_NODE_ALREADY_MEMBER) mean?

 
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ERROR_CLUSTER_NETWORK_ALREADY_OFFLINE ERROR_CLUSTER_LAST_INTERNAL_NETWORK

ERROR_CLUSTER_NODE_ALREADY_MEMBER

An add-node operation was requested for a node that the cluster already recognizes as a member. The node may still be Down or Paused, so check state before deciding whether any recovery is required.

What to check

  • Use the node inventory to verify member state, node ID, and whether the request targeted the correct cluster.
  • If a prior add attempt appears incomplete, inspect logs before removing or re-adding the node.
  • Avoid duplicate deployment workflows that repeatedly add the same server.
Get-ClusterNode

Microsoft: Get-ClusterNode

Microsoft: Get-ClusterLog

Microsoft: Test-Cluster


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