What does HRESULT 0xC00D4279 (MF_E_NET_CLIENT_CLOSE) mean?

 
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MF_E_NET_TIMEOUT MF_E_NET_BAD_CONTROL_DATA

MF_E_NET_CLIENT_CLOSE

MF_E_NET_CLIENT_CLOSE means the control connection was closed locally by the client. It often follows cancellation, shutdown, a source stop request, or an application lifecycle race.

Diagnostic discriminator: Correlate the close timestamp with the caller’s Stop, Close, or cancellation path. A fresh session that succeeds against the same server points to local teardown ordering or a lifecycle race rather than origin availability.

What to check for MF_E_NET_CLIENT_CLOSE

  • Check whether application code called stop, close, or cancellation before the network operation completed.
  • Inspect concurrent state changes around media session shutdown.
  • Treat this as a local lifecycle signal before looking for a server-side fault.

Microsoft: Networking in Media Foundation

Microsoft: Media Foundation client logging


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