What does Windows error code 5931 (ERROR_CLUSTER_RHS_FAILED_INITIALIZATION) mean?

Status / error code:		Category:

Constant name:
Source:		Operating System:
Description: The RHS process failed to initialize.

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ERROR_EXCEPTION_IN_RESOURCE_CALL	ERROR_CLUSTER_NOT_INSTALLED

ERROR_CLUSTER_RHS_FAILED_INITIALIZATION

ERROR_CLUSTER_RHS_FAILED_INITIALIZATION means the Resource Hosting Subsystem (RHS) process could not initialize. Resources hosted by that process cannot start correctly until the underlying resource-host problem is resolved.

What to check

Identify the resource or resource DLL that was being brought online when RHS initialization failed.
Review System and FailoverClustering events for crashes, missing dependencies, access problems, or incompatible resource DLLs.
Collect logs before restarting the resource repeatedly, because repeated attempts can obscure the first failure.

Get-ClusterLog -UseLocalTime -Destination C:\Temp
Get-ClusterResource | Format-Table Name, ResourceType, State, OwnerNode

Microsoft: Get-ClusterLog

Microsoft: Troubleshoot unexpected cluster failover

Microsoft: Troubleshoot a cluster physical disk that cannot come online

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