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NS_E_HEADER_MISMATCH
NS_E_HEADER_MISMATCH: owning object, evidence and recovery
Mechanism and scope
This result (0xC00D151F) marks a command is being applied to a different ASF/media-header generation than the component currently owns. The most useful interpretation starts with the Windows Media Services object that returned the HRESULT.
A server distribution path connects a data source, parser, media header and one or more data sinks., push publication adds an encoder-to-server control path, while client delivery uses a separate protocol and connection state. In a this result trace, trace input and output independently: source selection, parsing/header creation and sink selection are separate checkpoints. The decisive question is whether the live object and values match that boundary; the base AllStat description alone does not reveal the object generation, selected plug-in or lower-level failure.
Verification outcomes
| Retest observation | Interpretation |
|---|---|
| The same call still returns this result | The rejected precondition has not changed, or the caller is still using an old object/configuration generation. |
| The operation advances and a later code appears | The boundary was cleared. After this result, diagnose the new code at its own source, parser, sink, network or client stage. |
| A new object succeeds while the retained object fails | Object lifetime or stale context is part of the incident; update lifecycle handling rather than applying a machine-wide repair. |
| Only one publishing point, playlist, cache key or plug-in fails | The evidence favors object-specific configuration or content over a server-wide outage. |
Code-specific failure anatomy
In a representative incident, the server reaches a command is being applied to a different ASF/media-header generation than the component currently owns and rejects the operation before the caller can safely assume the next stage occurred. The incident record should therefore join header identifier/hash, command context, stream switch, publishing-point restart and packetizer generation with the object generation and the exact administrative or protocol request.
A useful negative control is obtain the current header/context and issue the command against that exact generation. If that change advances the same it call, the result supports this boundary. If it remains, return to the first lower-level event instead of broadening the repair.
The tempting but misleading response is replaying a command captured before stream or header switch. That action does not test the distinction that matters here: stale presentation is client/presentation metadata; header mismatch is the media-header identity used by a server component. This distinction is also why monitoring should retain the symbolic name instead of storing only a generic COM failure.
Build a reproducible incident record
| Evidence | Why it matters for it |
|---|---|
| Decisive state | header identifier/hash, command context, stream switch, publishing-point restart and packetizer generation. |
| Owning object | Record the server, publishing point, playlist, namespace node, plug-in or cache item that returned it, including its creation or restart time. |
| First lower-level result | Preserve the earliest Win32, socket, COM, parser or plug-in event before the HRESULT; later wrappers can map several causes to it. |
| Controlled comparison | Use a known-good object of the same type and vary only the precondition described as “a command is being applied to a different ASF/media-header generation than the component currently owns”. |
| Security-sensitive data | Log identifiers, lengths, hashes and redacted URLs where possible; do not publish passwords, authorization files or unrestricted client data. |
A controlled correction
- Capture
0xC00D151F, it, the exact API/administrative action and the first failure timestamp. - Preserve header identifier/hash, command context, stream switch, publishing-point restart and packetizer generation.
- confirm that the object still belongs to the current WMServer, publishing-point or presentation generation.
- Perform one isolated experiment: obtain the current header/context and issue the command against that exact generation.
- Repeat the original the operation through the same protocol and service account; do not substitute a different client-side test.
- After it, verify the expected next state and retain any later HRESULT as a separate pipeline result.
Success means the same operation crosses this checkpoint and produces the expected next state, not merely that the symbolic code disappears.
Do not merge nearby HRESULT values
Primary distinction: stale presentation is client/presentation metadata; header mismatch is the media-header identity used by a server component.
| Nearby result | Different checkpoint |
|---|---|
NS_E_PUSH_DUPLICATE_PUBLISHING_POINT_NAME | Compare its own symbolic boundary and the first failing call; it must not be grouped automatically with it. |
NS_E_WSX_INVALID_VERSION | Relative to it, this neighboring result belongs to another state or validation branch even when the user-visible symptom is similar. |
NS_E_DATAPATH_NO_SINK | Use the object type and operation sequence to determine which result is authoritative. |
Changes that do not establish the cause
- replaying a command captured before stream or header switch.
- a broad reinstall is especially weak evidence here because it changes many unrelated components while leaving the rejected server precondition unexplained.
- Do not suppress it or replace it with a generic “media server error”; retain the symbolic code and owning operation in telemetry.
Technical references
- Windows Media Services 9 Series SDK
- Sending ASF Data to a Publishing Point
- Media Streaming Server Protocol Summary
- Microsoft HRESULT registry
Close the incident only after it clears on a current object.
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