What does HRESULT 0xC00D158A (NS_E_PORT_IN_USE) mean?

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Description:

One usage of each socket address (protocol/network address/port) is permitted. Verify that other services or applications are not attempting to use the same port and then try to enable the plug-in again.%0

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NS_E_HTTP_TEXT_DATACONTAINER_SIZE_LIMIT_EXCEEDED	NS_E_PORT_IN_USE_HTTP

NS_E_PORT_IN_USE

Where the condition occurs

This result (0xC00D158A) marks the plug-in cannot bind its configured protocol/address/port tuple because another socket owns it. The most useful interpretation starts with the Windows Media Services object that returned the HRESULT.

Code-specific failure anatomy

A representative occurrence is when the plug-in cannot bind its configured protocol/address/port tuple because another socket owns it. Capture protocol, local address, port, owning PID/service and whether wildcard or exclusive binding is used together with the object instance and the exact administrative or protocol request.

For a useful negative control, identify the listener and assign nonconflicting endpoints or disable the unintended service.

The tempting but misleading response is opening the firewall; binding fails before remote traffic is considered. That action does not test the distinction that matters here: the HTTP-specific variant highlights common IIS/WMS contention on the HTTP control port.

What to record before changing anything

Controlled comparison

Use a known-good object of the same type and vary only the precondition described as “the plug-in cannot bind its configured protocol/address/port tuple because another socket owns it”.

A controlled correction

Capture 0xC00D158A, the symbolic name, the exact API/administrative action and the first failure timestamp.
Preserve protocol, local address, port, owning PID/service and whether wildcard or exclusive binding is used.
Perform one isolated experiment: identify the listener and assign nonconflicting endpoints or disable the unintended service.

Related codes are different

Primary distinction: the HTTP-specific variant highlights common IIS/WMS contention on the HTTP control port.

Nearby result	Different condition
`NS_E_PORT_IN_USE_HTTP`	the WMS HTTP control plug-in conflicts with IIS or another HTTP listener on the selected endpoint.
`NS_E_HTTP_TEXT_DATACONTAINER_SIZE_LIMIT_EXCEEDED`	the WMS HTTP Download Data Source received a text/playlist response larger than its supported container.
`NS_E_HTTP_TEXT_DATACONTAINER_INVALID_SERVER_RESPONSE`	the HTTP Download Data Source could not interpret the upstream server response.

Changes that do not establish the cause

opening the firewall; binding fails before remote traffic is considered.

Technical references

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