ERROR_CLUSTER_NODE_DOWN - 5050 (0x13BA)
The cluster node is down.
Updated: Feb 21, 2026
Technical Meaning
The ERROR_CLUSTER_NODE_DOWN error code indicates that a node in a Windows Failover Cluster is not operational. This can occur when the cluster manager detects that a node has failed or is unreachable.
Error Details
This error typically arises during operations that require communication with all nodes in the cluster, such as adding or removing resources, managing quorum, or performing failover actions. The presence of this error suggests that one or more nodes are not functioning correctly and may need to be brought back online or addressed.
Usage Context
This error is commonly encountered when using Windows Failover Cluster Manager (FCM) tools or APIs for cluster management tasks. It can also appear in event logs or as a return value from functions that interact with the cluster infrastructure.
Developer Interpretation
When encountering ERROR_CLUSTER_NODE_DOWN, developers should consider it an indication of a potential failure within the cluster topology. The error does not specify which node is down, so further investigation may be required to identify and resolve the issue. Common causes include hardware failures, network connectivity issues, or software malfunctions on the node.
Related Errors
ERROR_CLUSTER_NODE_NOT_FOUND(5048)ERROR_CLUSTER_NODE_ALREADY_UP(5062)ERROR_CLUSTER_NODE_EXISTS(5071)
FAQ
Q: What does ERROR_CLUSTER_NODE_DOWN mean?
A: It indicates that a node in the cluster is not operational.
Q: How can I troubleshoot this error?
A: Review the cluster status, check network connectivity, and verify hardware functionality on the affected nodes.
Summary
The ERROR_CLUSTER_NODE_DOWN error code signifies a failure of one or more nodes within a Windows Failover Cluster. Developers should interpret it as an indication that further investigation is necessary to identify and resolve the underlying issue.