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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 changing state in this condition and distinguish later summary errors.
Important boundary. Connection cleanup concerns a transport/server object and may not correspond one-to-one with an authenticated user session. Record the exact constant and returning API.
Minimum useful evidence
| Incident fact | What it separates |
|---|---|
| Connection ID, endpoint pair, server object state, last activity time, and administrator source | Ties the message to one server object and one transition instead of a later retry. |
| Sessions or streams associated with the connection | Separates configuration or identity from storage, parser, network, or lifecycle state. |
| Transport errors, keepalive/timeout events, and reason it was classified obsolete | Provides a stable before/after comparison for the proposed correction. |
| Resource counters before and after deletion | Shows whether the status is expected information, a warning, or the first failure in the event sequence. |
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
When a minimal control succeeds, the failure is tied to the original object or its state rather than to the whole Windows subsystem. When the control fails identically, preserve host-level evidence first. If a different code appears, that is a moved boundary, not automatic success.
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. Keep the original server configuration, event sequence, object inventory, input hash, and topology snapshot so the change can be reversed and explained.
Accept the repair only when obsolete objects are removed without disrupting active sessions and connection counts return to a stable baseline. Repeat the original supported operation under the original identity and object state; a simplified media file, replacement server, new session, or different client is useful comparison evidence but not final regression proof.
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 or component boundary.
- 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.
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