System.Net.Tests.HttpListenerRequestTests fail with SocketException : Connection refused

[jkotas]

    System.Net.Tests.HttpListenerRequestTests.ContentEncoding_GetProperty_ReturnsExpected(header: "Content-Type:", expected: UTF8EncodingSealed { BodyName = "utf-8", CodePage = 65001, DecoderFallback = DecoderReplacementFallback { DefaultString = "�", MaxCharCount = 1 }, EncoderFallback = EncoderReplacementFallback { DefaultString = "�", MaxCharCount = 1 }, EncodingName = "Unicode (UTF-8)", ··· }) [FAIL]
      System.Net.Sockets.SocketException : Connection refused 127.0.0.1:1293
      Stack Trace:
        /_/src/libraries/System.Net.Sockets/src/System/Net/Sockets/Socket.cs(3216,0): at System.Net.Sockets.Socket.DoConnect(EndPoint endPointSnapshot, SocketAddress socketAddress)
        /_/src/libraries/System.Net.Sockets/src/System/Net/Sockets/Socket.cs(838,0): at System.Net.Sockets.Socket.Connect(EndPoint remoteEP)
        /_/src/libraries/System.Net.Sockets/src/System/Net/Sockets/Socket.cs(922,0): at System.Net.Sockets.Socket.Connect(IPAddress[] addresses, Int32 port)

Build Information

Build: https://dev.azure.com/dnceng-public/cbb18261-c48f-4abb-8651-8cdcb5474649/_build/results?buildId=611434
Build error leg or test failing: System.Net.HttpListener.Tests.WorkItemExecution
Pull request: #100066

Error Message

Fill the error message using step by step known issues guidance.

{
  "ErrorMessage": "",
  "ErrorPattern": "System.Net.Tests.HttpListenerRequestTests.ContentEncoding_GetProperty_ReturnsExpected.*FAIL",
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=611434
Error message validated: [System.Net.Tests.HttpListenerRequestTests.ContentEncoding_GetProperty_ReturnsExpected.*FAIL]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 3/21/2024 4:45:18 PM UTC

Report

Build	Definition	Test	Pull Request
953628	dotnet/runtime	System.Net.HttpListener.Tests.WorkItemExecution	#112543
952116	dotnet/runtime	System.Net.Tests.HttpResponseStreamTests.SimpleRequest_WriteSynchronouslyNonEmpty_Succeeds	#112543
952006	dotnet/runtime	System.Net.HttpListener.Tests.WorkItemExecution	#112543

Summary

24-Hour Hit Count	7-Day Hit Count	1-Month Count
0	0	3

[dotnet-policy-service]

Tagging subscribers to this area: @dotnet/ncl
See info in area-owners.md if you want to be subscribed.

[jeffschwMSFT]

removing blocking-clean-ci has this has not failed in 30 days

24-Hour Hit Count	7-Day Hit Count	1-Month Count
0	0	0

[wfurt]

low hit count, moving to future.