ERROR_RESMON_ONLINE_FAILED - 5018 (0x139A)
The cluster resource could not be brought online by the resource monitor.
Updated: Feb 21, 2026
Technical Meaning
The error code ERROR_RESMON_ONLINE_FAILED with the numeric value 5018 and hexadecimal representation 0x139A indicates that a cluster resource failed to be brought online by the resource monitor. This suggests an issue in the process of initializing or activating a specific resource within a Windows Failover Cluster environment.
Error Details
The resource monitor, which is responsible for managing and monitoring resources within a cluster, encountered a failure when attempting to bring a particular resource online. This could be due to various reasons such as incorrect parameters, corrupted data, or exceeding system limits. The exact nature of the failure can vary depending on the specific resource involved.
Usage Context
This error typically occurs in environments where Windows Failover Clusters are configured and managed. It is relevant for administrators and developers who need to troubleshoot issues related to cluster resources and their management within a failover cluster environment.
Developer Interpretation
Developers should interpret this error as an indication that the resource monitor was unable to successfully bring a specific cluster resource online. This could be due to invalid parameters, incorrect object types, or other factors that prevent the resource from being activated properly. The error suggests that further investigation is required to determine the exact cause of the failure.
Related Errors
- ERROR_CLUSTER_INVALID_NODE (1208): Indicates an issue with a node in the cluster.
- ERROR_RESOURCE_NOT_ONLINE (5016): Suggests that a resource is not currently online, which could be related to
ERROR_RESMON_ONLINE_FAILED.
FAQ
Q: What does ERROR_RESMON_ONLINE_FAILED mean?
A: This error indicates that the resource monitor was unable to bring a specific cluster resource online. It suggests an issue with the initialization or activation process of the resource within the failover cluster environment.
Q: How can I troubleshoot this error?
A: Review the operation context, validate parameters, confirm object types, and verify input data. Check for any limits or constraints that might be exceeded. Consider consulting the Windows Failover Cluster documentation for further guidance on troubleshooting resource issues.
Summary
ERROR_RESMON_ONLINE_FAILED is a specific error code indicating an issue with bringing a cluster resource online by the resource monitor. It requires careful investigation to determine the exact cause, which could involve parameter validation, object type confirmation, or other factors related to the failover cluster environment.