[ci-scan] Test failure: HandleEventShutdownInitiatedByTransport fails with QuicException : The connection timed out from inactivity.

[rzikm]

Build Information

Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1586034
Build error leg or test failing: net11.0-osx-Debug-x64-Mono_Minijit_Debug-OSX.15.Amd64.Open - System.Net.Quic.Functional.Tests
Pull request: #133361

KBE authoring guidance (ci-failure-scan)

• Error Details is for readers. The exception and stack trace are included below so the failure is understandable without opening the raw log.
• Build Analysis parses only the JSON block under Error Message.
• ErrorMessage entries are case-sensitive ordinal String.Contains substrings copied verbatim from the failing log.
• BuildRetry is false because this is a recurring test failure rather than a clear infrastructure retry case.

Error Details

System.Net.Quic.Tests.QuicStreamConformanceTests.ConcurrentBidirectionalReadsWrites_Success [FAIL]
  System.Net.Quic.QuicException : The connection timed out from inactivity.
  at System.Net.Quic.QuicConnection.HandleEventShutdownInitiatedByTransport(_SHUTDOWN_INITIATED_BY_TRANSPORT_e__Struct& data) in /_/src/libraries/System.Net.Quic/src/System/Net/Quic/QuicConnection.cs:line 657
  at System.Net.Quic.QuicConnection.HandleConnectionEvent(QUIC_CONNECTION_EVENT& connectionEvent) in /_/src/libraries/System.Net.Quic/src/System/Net/Quic/QuicConnection.cs:line 771
  at System.Net.Quic.QuicConnection.NativeCallback(QUIC_HANDLE* connection, Void* context, QUIC_CONNECTION_EVENT* connectionEvent) in /_/src/libraries/System.Net.Quic/src/System/Net/Quic/QuicConnection.cs:line 806
--- End of stack trace from previous location ---
  at System.Net.Quic.ValueTaskSource.System.Threading.Tasks.Sources.IValueTaskSource.GetResult(Int16 token) in /_/src/libraries/System.Net.Quic/src/System/Net/Quic/Internal/ValueTaskSource.cs:line 176
  at System.Net.Quic.QuicConnection.FinishConnectAsync(QuicClientConnectionOptions options, CancellationToken cancellationToken) in /_/src/libraries/System.Net.Quic/src/System/Net/Quic/QuicConnection.cs:line 452
  at System.Net.Quic.Tests.QuicStreamConformanceTests.CreateConnectedStreamsAsync() in /_/src/libraries/System.Net.Quic/tests/FunctionalTests/QuicStreamConnectedStreamConformanceTests.cs:line 80
  at System.IO.Tests.ConnectedStreamConformanceTests.ConcurrentBidirectionalReadsWrites_Success() in /_/src/libraries/Common/tests/StreamConformanceTests/System/IO/StreamConformanceTests.cs:line 2516

This recurred after #105177 was closed. The older #107762 covered the same test hanging rather than this inactivity exception.

Error Message

{
  "ErrorMessage": [
    "System.Net.Quic.QuicException : The connection timed out from inactivity.",
     "at System.Net.Quic.QuicConnection.HandleEventShutdownInitiatedByTransport"
  ],
  "ErrorPattern": "",
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

Agentic workflow metadata (ci-failure-scan)

Workflow artifact: ci-failure-scan
Artifact kind: kbe-verification
Verified match count: 1 hit in the failed test result

Note

This issue was generated by GitHub Copilot.

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1586034
Error message validated: [System.Net.Quic.Tests.QuicStreamConformanceTests.ConcurrentBidirectionalReadsWrites_Success System.Net.Quic.QuicException : The connection timed out from inactivity.]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 9/7/2026 6:15:41 PM UTC

Report

Build	Repository	Test	Pull Request
1586034	dotnet/runtime	System.Net.Quic.Tests.QuicStreamConformanceTests.ConcurrentBidirectionalReadsWrites_Success	#133361

Summary

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

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1586034
Error message validated: [System.Net.Quic.QuicException : The connection timed out from inactivity. at System.Net.Quic.QuicConnection.HandleEventShutdownInitiatedByTransport]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 9/9/2026 5:59:06 PM UTC

Report

Build	Repository	Test	Pull Request
1586034	dotnet/runtime	System.Net.Quic.Tests.QuicStreamConformanceTests.ConcurrentBidirectionalReadsWrites_Success	#133361

Summary

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

Report

Build	Repository	Test	Pull Request
1592881	dotnet/runtime	System.Net.Quic.Tests.QuicStreamTests.ReadWrite_Random_Success	#132721
1592345	dotnet/runtime	System.Net.Quic.Tests.QuicStreamTests.ReadWrite_Random_Success	#133599
1591884	dotnet/runtime	System.Net.Quic.Tests.QuicStreamConformanceTests.ReadWrite_Success	#133651
1591715	dotnet/runtime	System.Net.Quic.Tests.MsQuicTests.DoesNotSendIPAsSni	#133639
1589516	dotnet/runtime	System.Net.Quic.Tests.QuicStreamConformanceTests.Read_Eof_Returns0	#133463
1589165	dotnet/runtime	System.Net.Quic.Tests.QuicStreamTests.ReadWrite_Random_Success	#132953
1588569	dotnet/runtime	System.Net.Quic.Tests.QuicStreamTests.WriteAbortedWithoutWriting_ReadThrows	#133474
1586034	dotnet/runtime	System.Net.Quic.Tests.QuicStreamConformanceTests.ConcurrentBidirectionalReadsWrites_Success	#133361

Summary

24-Hour Hit Count	7-Day Hit Count	1-Month Count
2	8	8

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