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NS_E_ALREADY_CONNECTED
NS_E_ALREADY_CONNECTED — 0xC00D0010
Diagnosing NS_E_ALREADY_CONNECTED
NS_E_ALREADY_CONNECTED identifies this Windows Media Services boundary: the network connection already exists.
Why this boundary matters
This HRESULT belongs to a specific network or control-path stage. Keep the resolved endpoint and selected protocol fixed, and preserve the first socket/protocol result so DNS, connection, negotiation, response parsing and media delivery are not collapsed into one generic network failure.
Evidence to collect
| Field | What to preserve |
|---|---|
| Peer | Resolved server/peer endpoint and the protocol actually selected for the request. |
| Stage | Last completed stage: resolution, connection, control exchange, response parsing or media delivery. |
| Transport result | First socket/protocol status, timeout/reset indication, and byte counts when data transfer started. |
| Intermediaries | Proxy, gateway or second Content Server involved in the same path, including its identity. |
Decision rule
Keep endpoint and protocol fixed while changing one network precondition; a later socket or parser result is a new boundary and should be diagnosed separately.
Focused test
Record the existing connection endpoints and generation. Verify whether the caller is reusing the same live connection or attempting to create a duplicate before closing anything.
Verification
Repeat the same request to the same endpoint with the same selected protocol. Confirm it passes the previously failing network stage; if it advances and fails later, diagnose the later socket/protocol result separately.
Technical references
- System control protocol plug-ins
- Microsoft Media Server protocol
- WMS HTTP proxy interaction
- Microsoft HRESULT values for the Windows Media namespace
For automation, log the symbolic name as well as the numeric HRESULT. The symbolic name preserves the Windows Media subsystem boundary that a generic COM error formatter can obscure.
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