What does HRESULT 0x400D005E (NS_I_KILL_CONNECTION) mean?

NS_I_KILL_CONNECTION

NS_I_KILL_CONNECTION — 0x400D005E

A productive reading of forced obsolete-connection removal begins at the component boundary where an administrator removed a connection object considered obsolete by the legacy media server.

Start at the returning layer

Windows Media Services distinguishes client sessions, lower-level connection objects, publishing points, and streams. In the context of forced obsolete-connection removal, session and connection identifiers are short-lived, and management actions must be correlated to the exact server instance and enumeration snapshot. Locate the first component that changes state and distinguish later summary errors.

Important distinction. Connection cleanup concerns a transport/server object and may not correspond one-to-one with an authenticated user session.

Minimum useful evidence

• Connection ID, endpoint pair, server object state, last activity time, and administrator source
• Sessions or streams associated with the connection
• Transport errors, keepalive/timeout events, and reason it was classified obsolete
• Resource counters before and after deletion

Collect enough to identify the attempt without copying private media or secrets; hashes, object IDs, timestamps, and configuration exports are normally sufficient.

Separate state from data

• Create a controlled stale connection and verify the server classification threshold. Keep media bytes, server identity, and unrelated publishing-point settings fixed.
• Compare removal of the connection object with termination of an active user session. Use a disposable publishing point or maintenance window when the test can alter server or storage state.
• Watch whether the same endpoint immediately creates a healthy replacement connection. Retain a known-good stream, session, or server object so a broad restart is not mistaken for repair of the reported failure.

Do not use repeated reconnects as the main test; a later success can belong to a new session, publishing-point generation, server owner, completed background operation, or different media path.

Nearby states and false leads

Also check severity: informational and warning values are observations or policy notifications and should be routed differently from a failure HRESULT even when an event viewer labels the source generically.

Verification after correction

Correction: Tune stale-connection detection or repair the client/proxy behavior that leaves obsolete objects, while preserving valid long-lived streams.

Accept the repair only when obsolete objects are removed without disrupting active sessions and connection counts return to a stable baseline.

Technical references

These sources describe the API, service architecture, and status values relevant to this diagnosis: Check version-specific behavior against the Windows Media Services and SDK generation that produced the event.

• Microsoft Open Specifications: HRESULT values — defines the formal status.
• Microsoft: Windows Media Services 9 Series SDK — documents the relevant API or lifecycle.
• Microsoft: programming the Windows Media server object model — provides the architecture, format, or protocol context.
• Microsoft Open Specifications: media streaming server scenario — supports the controlled verification criteria.