[ci-scan] Test failure: System.Net.Sockets.Tests.AcceptDualStackResetTests.Accept_DualStackListener_PeerImmediatelyResets_Listen [Content truncated due to length]

[github-actions]

Build Information

Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1597201
Build error leg or test failing: windows-x64 Release NativeAOT_Libs-System.Net.Sockets.Tests

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

[FAIL] System.Net.Sockets.Tests.AcceptDualStackResetTests.Accept_DualStackListener_PeerImmediatelyResets_ListenerStaysHealthy(useAsync: True)
System.Net.Sockets.SocketException : An existing connection was forcibly closed by the remote host.
   at System.Net.Sockets.Socket.AwaitableSocketAsyncEventArgs.ThrowException(SocketError, CancellationToken) in /_/src/libraries/System.Net.Sockets/src/System/Net/Sockets/Socket.Tasks.cs:line 1365
   at System.Net.Sockets.Socket.AwaitableSocketAsyncEventArgs.System.Threading.Tasks.Sources.IValueTaskSource<System.Net.Sockets.Socket>.GetResult(Int16) in /_/src/libraries/System.Net.Sockets/src/System/Net/Sockets/Socket.Tasks.cs:line 1289
   at System.Net.Sockets.Tests.AcceptDualStackResetTests.Accept_DualStackListener_PeerImmediatelyResets_ListenerStaysHealthy(Boolean) in /_/src/libraries/System.Net.Sockets/tests/FunctionalTests/Accept.cs:line 505

AcceptDualStackResetTests.Accept_DualStackListener_PeerImmediatelyResets_ListenerStaysHealthy(useAsync: True) fails on the Windows NativeAOT_Libs legs of runtime-nativeaot-outerloop with a SocketException : An existing connection was forcibly closed by the remote host. The test expects the dual-stack listener to stay healthy after a peer reset, but the accept path surfaces the reset as an unhandled SocketException. Reproduced across many Windows queues (x64/x86/arm64) in build 1597201 (2026-09-15) and still failing in build 1598166 (2026-09-16).

Error Message

{
  "ErrorMessage": [
    "System.Net.Sockets.Tests.AcceptDualStackResetTests.Accept_DualStackListener_PeerImmediatelyResets_ListenerStaysHealthy",
    "System.Net.Sockets.SocketException : An existing connection was forcibly closed by the remote host."
  ],
  "ErrorPattern": "",
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

Agentic workflow metadata (ci-failure-scan)

Workflow artifact: ci-failure-scan
Artifact kind: kbe-verification
Verified match count: 2 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 generated by the ci-failure-scan Copilot agentic workflow.

Generated by CI Outer-Loop Failure Scanner · opus48 · 1K AIC · ⌖ 19.8 AIC · ⊞ 19.7K · ◷

Report

Build	Repository	Test	Pull Request
1599178	dotnet/runtime	System.Net.Sockets.Tests.AcceptDualStackResetTests.Accept_DualStackListener_PeerImmediatelyResets_ListenerStaysHealthy	#133360
1598932	dotnet/runtime	System.Net.Sockets.Tests.AcceptDualStackResetTests.Accept_DualStackListener_PeerImmediatelyResets_ListenerStaysHealthy
1599030	dotnet/runtime	System.Net.Sockets.Tests.AcceptDualStackResetTests.Accept_DualStackListener_PeerImmediatelyResets_ListenerStaysHealthy	#134049

Summary

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

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[jtschuster]

Failing in runtime on coreclr legs, not nativeaot-specific