The Windows Failover Clustering service is reporting a cluster failover event has occurred. The primary clustered node is no longer active and the passive node has taken over as the primary.
For more details, view the status reported in the component's res_group_stat property in the PDW Admin Console or query the sys.dm_pdw_component_health_status DMV.
To diagnose this issue:
1) On the Host node, use a Windows administrator account to view the Cluster Events in the Failover Cluster Manager.
2) Use the sys.dm_pdw_os_events_logs DMV to check for relevant failures in the Windows Event Log for the node.
To resolve this issue, contact Microsoft support and provide them with the alert name and details. Microsoft Support will help you to understand the failure and help you to bring the node back online or into a healthy state.