[ci-scan] Test failure: System.Net.Quic MsQuicTests.ConnectWithCertificateForLoopbackIP_IndicatesExpectedError handshake timeout [Content truncated due to length]

[github-actions]

Build Information

Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1598787
Build error leg or test failing: windows-x64 Release (libraries-jitstress)-System.Net.Quic.Tests.MsQuicTests.ConnectWithCertificateForLoopbackIP_IndicatesExpectedError

KBE authoring guidance (ci-failure-scan)

• Error Details is for readers. Paste the full exception, stack trace, or build error excerpt so the failure is understandable without opening the raw log.
• Build Analysis parses only the single JSON block under Error Message.
• ErrorMessage is a case-sensitive ordinal String.Contains substring copied verbatim from the failing log.
• Set BuildRetry to true only for a clear infrastructure retry case. ExcludeConsoleLog disables Helix console-log scanning.

Error Details

System.Net.Quic.Tests.MsQuicTests.ConnectWithCertificateForLoopbackIP_IndicatesExpectedError(ipString: "127.0.0.1", expectsError: True) fails under JIT stress: the QUIC connection handshake is cancelled by the 10-second configured timeout. Observed on the libraries-jitstress pipeline (definition 138), windows-x64 Release, across builds 1598787 and 1600498 on main.

System.Net.Quic.Tests.MsQuicTests.ConnectWithCertificateForLoopbackIP_IndicatesExpectedError(ipString: "127.0.0.1", expectsError: True) [FAIL]
  System.Net.Quic.QuicException : Connection handshake was canceled due to the configured timeout of 00:00:10 seconds elapsing.
  Stack Trace:
    at System.Net.Quic.QuicConnection.<ConnectAsync>g__StartConnectAsync|2_0(QuicClientConnectionOptions options, CancellationToken cancellationToken)
    at System.Net.Quic.Tests.QuicTestBase.CreateConnectedQuicConnection(...)
    at System.Net.Quic.Tests.MsQuicTests.ConnectWithCertificateForLoopbackIP_IndicatesExpectedError(String ipString, Boolean expectsError)

Error Message

{
  "ErrorMessage": [
    "ConnectWithCertificateForLoopbackIP_IndicatesExpectedError(ipString: \"127.0.0.1\", expectsError: True) [FAIL]",
    "System.Net.Quic.QuicException : Connection handshake was canceled due to the configured timeout of 00:00:10 seconds elapsing."
  ],
  "ErrorPattern": "",
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

Agentic workflow metadata (ci-failure-scan)

Workflow artifact: ci-failure-scan
Artifact kind: kbe-verification
Verified match count: 1 hits in failure.log

---

Filed by ci-failure-scan (detection only). ci-failure-fix walks open [ci-scan] KBEs and either opens a small fix PR or comments here to loop in owners — it never disables the test.

Note

This issue was filed by an AI agent (GitHub Copilot / ci-failure-scan).

Generated by CI Outer-Loop Failure Scanner · opus48 · 997.5 AIC · ⌖ 14.6 AIC · ⊞ 19.2K · ◷

Report

Build	Repository	Test	Pull Request
1604307	dotnet/runtime	System.Net.Quic.Tests.MsQuicTests.ConnectWithCertificateForLoopbackIP_IndicatesExpectedError
1604288	dotnet/runtime	System.Net.Quic.Tests.MsQuicTests.ConnectWithCertificateForLoopbackIP_IndicatesExpectedError	#134312
1604010	dotnet/runtime	System.Net.Quic.Tests.MsQuicTests.ConnectWithCertificateForLoopbackIP_IndicatesExpectedError	#133656
1603718	dotnet/runtime	System.Net.Quic.Tests.MsQuicTests.ConnectWithCertificateForLoopbackIP_IndicatesExpectedError	#130079
1602838	dotnet/runtime	System.Net.Quic.Tests.MsQuicTests.ConnectWithCertificateForLoopbackIP_IndicatesExpectedError	#134212
1602498	dotnet/runtime	System.Net.Quic.Tests.MsQuicTests.ConnectWithCertificateForLoopbackIP_IndicatesExpectedError	#134198
1602441	dotnet/runtime	System.Net.Quic.Tests.MsQuicTests.ConnectWithCertificateForLoopbackIP_IndicatesExpectedError

Summary

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

[dotnet-policy-service]

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

[github-actions]

Workflow artifact: ci-fix
Artifact kind: handoff
Linked KBE: #134171

Note

AI/Copilot-generated triage note.

This KBE has no safe automated diff: the expected-error MsQuic handshake times out only in libraries-jitstress. Increasing the timeout would weaken regression detection rather than fix the codegen-stress behavior.

Evidence

• Failing build: 1598787
• First build it occurred: 1598787

Suggested reviewers / area contacts

• Area owners (area-System.Net.Quic): @karelz, @dotnet/ncl

A fix likely identifies why JIT stress does not complete the expected-error handshake before cancellation.

Structured data:

{
  "artifact_kind": "handoff",
  "linked_kbe": 134171,
  "workflow_artifact": "ci-fix"
}

Generated by CI Outer-Loop Failure Fixer · gpt56 · 124.3 AIC · ⌖ 18.2 AIC · ⊞ 26.9K · ◷

[VincentBu]

Failed in: runtime-coreclr libraries-jitstress 20260917.1

Failed tests:

net11.0-windows-Release-x64-jitstress1_tiered-Windows.Amd64.Open.rt
- System.Net.Quic.Tests.MsQuicTests.ConnectWithCertificateForLoopbackIP_IndicatesExpectedError(ipString: \"127.0.0.1\", expectsError: True)

Error message:

System.Net.Quic.Tests.MsQuicTests.ConnectWithCertificateForLoopbackIP_IndicatesExpectedError(ipString: "127.0.0.1", expectsError: True) [FAIL]
      System.Net.Quic.QuicException : Connection handshake was canceled due to the configured timeout of 00:00:10 seconds elapsing.

Stack trace:

/_/src/libraries/System.Net.Quic/src/System/Net/Quic/QuicConnection.cs(96,0): at System.Net.Quic.QuicConnection.<ConnectAsync>g__StartConnectAsync|2_0(QuicClientConnectionOptions options, CancellationToken cancellationToken)
        /_/src/libraries/System.Net.Quic/tests/FunctionalTests/QuicTestBase.cs(222,0): at System.Net.Quic.Tests.QuicTestBase.CreateConnectedQuicConnection(QuicClientConnectionOptions clientOptions, QuicListener listener)
        /_/src/libraries/System.Net.Quic/tests/FunctionalTests/QuicTestBase.cs(257,0): at System.Net.Quic.Tests.QuicTestBase.CreateConnectedQuicConnection(QuicClientConnectionOptions clientOptions, QuicListener listener)
        /_/src/libraries/System.Net.Quic/tests/FunctionalTests/QuicTestBase.cs(191,0): at System.Net.Quic.Tests.QuicTestBase.CreateConnectedQuicConnection(QuicClientConnectionOptions clientOptions, QuicListenerOptions listenerOptions)
        /_/src/libraries/System.Net.Quic/tests/FunctionalTests/QuicTestBase.cs(191,0): at System.Net.Quic.Tests.QuicTestBase.CreateConnectedQuicConnection(QuicClientConnectionOptions clientOptions, QuicListenerOptions listenerOptions)
        /_/src/libraries/System.Net.Quic/tests/FunctionalTests/MsQuicTests.cs(604,0): at System.Net.Quic.Tests.MsQuicTests.ConnectWithCertificateForLoopbackIP_IndicatesExpectedError(String ipString, Boolean expectsError)
        --- End of stack trace from previous location ---