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HTTP_E_STATUS_AMBIGUOUS
HTTP_E_STATUS_AMBIGUOUS maps to HTTP 300 Multiple Choices. It indicates that the target resource has more than one representation or action available and the response may describe alternatives.
What to check for HTTP_E_STATUS_AMBIGUOUS
- Inspect the response body and headers for the alternatives supplied by the service.
- Check content negotiation inputs such as
Accept,Accept-Language, or application-specific selection parameters. - When the endpoint is API-only, confirm that the server is not returning an interactive representation-selection page unexpectedly.
RFC 9110: 300 Multiple Choices
Diagnostic interpretation
This result has the HRESULT value 0x8019012C. AllStat records the condition as “Multiple choices (300).”.
Evidence to capture
- Capture any IErrorInfo text, activity identifier, event-log entry, and subsystem trace that mentions this result or the ambiguous operation.
- check the documented return contract of the specific API because the same HRESULT can require different recovery in different interfaces.
Retry and recovery
” has changed.
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