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ERROR_EVENT_PENDING
What ERROR_EVENT_PENDING means
A Transport Driver Interface event indication entered a pending state. In practical terms, this status belongs to legacy asynchronous TDI events: the client will finish processing later and must eventually complete the operation.
Typical causes
- The indication requires asynchronous I/O
- The client retained buffers or context for deferred processing
- Backpressure delayed immediate completion
How to investigate
- Record the pending context and ownership of every retained buffer
- Ensure a completion or cancellation path always runs
- Check unload and disconnect handling for outstanding indications
Developer guidance
Pending transfers ownership and lifetime responsibilities. Drivers must not free request state until the later completion path has executed.
References
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