ERROR_RESOURCE_NOT_ONLINE - 5004 (0x138C)
The cluster resource is not online.
Updated: Feb 21, 2026
Technical Meaning
The ERROR_RESOURCE_NOT_ONLINE error code indicates that a cluster resource is not currently online. This typically occurs in the context of Windows Failover Clustering, where resources are managed to ensure high availability and fault tolerance.
Error Details
This error can be returned by various APIs or system components when attempting to access or manage a resource that is offline. The specific behavior and implications depend on the context in which the error occurs.
Usage Context
The ERROR_RESOURCE_NOT_ONLINE error code is commonly encountered in scenarios involving cluster management, such as:
- Attempting to start a cluster resource that is not online.
- Performing operations on a resource that requires it to be online for successful execution.
- Monitoring the status of resources within a failover cluster.
Developer Interpretation
When encountering this error, developers should consider the following aspects:
- Verify the state of the resource in question. Ensure that the resource is indeed marked as online and not in an offline or maintenance state.
- Check for any pending operations or tasks that might have caused the resource to go offline.
- Review cluster configuration settings and ensure they are correctly set up to manage the resource's availability.
Related Errors
ERROR_CLUSTER_NOT_STARTED(1208, 0x4B4)ERROR_RESOURCE_DOES_NOT_EXIST(5003, 0x138B)ERROR_INVALID_STATE(5007, 0x138F)
FAQ
Q: What does the ERROR_RESOURCE_NOT_ONLINE error mean?
A: It indicates that a cluster resource is not currently online and cannot be accessed or managed.
Q: How can I resolve this issue?
A: Ensure the resource is marked as online in the cluster configuration, and check for any pending operations that might have caused it to go offline.
Summary
The ERROR_RESOURCE_NOT_ONLINE error code signifies that a cluster resource is not available for operation. Developers should focus on verifying the state of the resource and ensuring proper cluster management practices are followed.