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STATUS_VID_TOO_MANY_HANDLERS
The VID handler table reached its limit
STATUS_VID_TOO_MANY_HANDLERS is a capacity or leak-style condition in the host virtualization path. The request is not saying that one particular handler name is invalid; it says VID cannot accept another registration.
VID has reached the allowed number of registered handlers, making this a registration-capacity or leaked-lifetime condition rather than a duplicate identity. Inventory active handler owners and repeated startup attempts to find registrations that accumulated without the corresponding deregistration.
Repeated VM start attempts, partial failures during device setup, or third-party virtualization components can make the symptom appear far away from the original registration leak.
What to inspect
- Check whether the count grows after failed VM creation, device assignment, or worker-process crash/retry cycles.
- Compare the first failing registration with earlier successful registrations in the same boot session.
- Restarting a VM may clear a symptom, but the useful evidence is the earlier component that failed to deregister.
References
- Microsoft: Hyper-V architecture
- Microsoft TLFS: inter-partition communication
- Linux kernel documentation: VMBus
- Microsoft Open Specifications: NTSTATUS values
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