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ERROR_CLUSTER_JOIN_IN_PROGRESS
Failover Clustering serializes membership changes. Starting another join, eviction, or configuration operation while a node is joining can make diagnosis harder and can abort the original operation.
What to check
- Wait for the current join to finish or fail and then inspect the first failure in the cluster log.
- Confirm that no administrator, automation job, or deployment tool is attempting the same add-node action concurrently.
- Verify stable connectivity, DNS, and matching cluster prerequisites before retrying the join.
Get-ClusterLog -UseLocalTime -Destination C:\ClusterLogsMicrosoft: Create and manage a failover cluster
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