8.0: Http2_IncorrectServerPreface_RequestFailsWithAppropriateHttpProtocolException failed
Nobody has claimed this yet.
Assessment
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Newbie friendliness
- 25/100
- Issue type
- Bug
- Clarity
- Needs clarification
- Activity status
- Stale
- Tech stack
- csharp
- Domain
- networking
Research direction
Start with build 1126730 and the System.Net.Http.Functional.Tests.SocketsHttpHandlerTest_Http2.Http2_IncorrectServerPreface_RequestFailsWithAppropriateHttpProtocolException failure. Review the related pull request and recurring known-issue report, then verify the test reports the expected HttpProtocolError rather than Unknown.
Written by the indexing model from the issue text.
Description
Build Information
Build: https://dev.azure.com/dnceng-public/cbb18261-c48f-4abb-8651-8cdcb5474649/_build/results?buildId=1126730
Build error leg or test failing: System.Net.Http.Functional.Tests.SocketsHttpHandlerTest_Http2.Http2_IncorrectServerPreface_RequestFailsWithAppropriateHttpProtocolException
Pull request: https://github.com/dotnet/runtime/pull/117878
Error Message
Fill the error message using step by step known issues guidance.
{
"ErrorMessage": ["Expected: HttpProtocolError", "Actual: Unknown"],
"ErrorPattern": "",
"BuildRetry": false,
"ExcludeConsoleLog": false
}
Known issue validation
Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1126730
Error message validated: [Expected: HttpProtocolError Actual: Unknown]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 8/19/2025 9:36:46 PM UTC
Report
Summary
| 24-Hour Hit Count | 7-Day Hit Count | 1-Month Count |
|---|---|---|
| 1 | 5 | 12 |
- Dominant language
- C#
- Stars
- 18.3k
- Forks
- 5.6k
- PR merge metrics
- PR metrics pending
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
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