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NS_E_PORT_IN_USE_HTTP
What the server is validating
This result (0xC00D158B) marks the WMS HTTP control plug-in conflicts with IIS or another HTTP listener on the selected endpoint. The code identifies a narrow server contract, so diagnosis should preserve the object instance and the first native return.
Administration and system plug-ins validate concrete properties before they bind sockets, emit logs, download remote data or archive a stream; a failure at this layer should be diagnosed from the plug-in configuration and its first lower-level result. In the trace, export the exact plug-in property values and record the service identity. When diagnosing this result, mMC display text alone can hide binding scope, normalized URLs or inherited defaults.
Build a reproducible incident record
| 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 this result. |
| Controlled comparison | Use a known-good object of the same type and vary only the precondition described as “the WMS HTTP control plug-in conflicts with IIS or another HTTP listener on the selected endpoint”. |
Do not merge nearby HRESULT values
Primary distinction: generic port in use can affect any socket plug-in; it specifically identifies the HTTP control path.
| Nearby result | Different condition |
|---|---|
NS_E_HTTP_TEXT_DATACONTAINER_INVALID_SERVER_RESPONSE | the HTTP Download Data Source could not interpret the upstream server response. |
NS_E_PORT_IN_USE | the plug-in cannot bind its configured protocol/address/port tuple because another socket owns it. |
NS_E_ARCHIVE_REACH_QUOTA | the archive data writer has consumed its configured storage quota. |
Code-specific failure anatomy
A representative occurrence is when the WMS HTTP control plug-in conflicts with IIS or another HTTP listener on the selected endpoint. Capture HTTP IP/port binding, IIS sites, HTTP.sys reservations, WMS plug-in settings and owning process/service together with the object instance and the exact administrative or protocol request.
For a useful negative control, move IIS or WMS to a distinct binding and verify the intended service answers the port.
The tempting but misleading response is changing RTSP settings while the HTTP endpoint remains occupied. That action does not test the distinction that matters here: generic port in use can affect any socket plug-in; it specifically identifies the HTTP control path.
Test the owning precondition
- Capture
0xC00D158B, the symbolic name, the exact API/administrative action and the first failure timestamp. - Preserve HTTP IP/port binding, IIS sites, HTTP.
- Perform one isolated experiment: move IIS or WMS to a distinct binding and verify the intended service answers the port.
Changes that do not establish the cause
- changing RTSP settings while the HTTP endpoint remains occupied.
- Avoid changing the publishing point, protocol, content and plug-in set in one test; such a test cannot show which precondition cleared the code.
Technical references
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