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STATUS_HV_INVALID_PORT_ID
The connection no longer resolves to a usable destination port
STATUS_HV_INVALID_PORT_ID is not merely an invalid number. For HvCallPostMessage, the associated port can have been deleted, can belong to a partition that is no longer active, or can be a port type that cannot receive a message.
That makes the port lifecycle and type part of the diagnosis. A valid connection ID captured earlier can become unusable after a remote partition transition or a port reconfiguration. Recreating a connection without identifying which endpoint was removed can leave the same race in place.
What to retain
- The connection ID, resolved port ID, port type and destination partition.
- Port creation/deletion events and the destination partition’s state.
- The operation attempted: message post, event signal, or another inter-partition action.
- Endpoint ownership and cleanup order during shutdown or reconnect.
References
- Microsoft: HvCallPostMessage
- Microsoft: virtual interrupt controller and SynIC
- Linux source: Hyper-V integration-service messaging
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