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[ci-scan] Hang: System.Diagnostics.Process.Tests times out on windows-x86 Checked CoreCLR #135001

Description

@lewing

Build Information

Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1618965
Build error leg or test failing: windows-x86 Debug Libraries_CheckedCoreCLR-System.Diagnostics.Process.Tests
Pull request: #134960

This is a recurrence of #131389 (the same System.Diagnostics.Process.Tests whole-work-item hang on Windows), which was closed on 2026-09-21 after 30 days without failures. That one was on windows-x64 Release NativeAOT_Libs; this one is on CoreCLR windows-x86 Checked. Build Analysis reports a 2.61% failure rate for this work item.

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

The work item starts and reports a couple of [SKIP] lines. After that no further output appears, until the Helix executor kills it (exit code -3, about 15m35s). No [FAIL] line is emitted, so the hanging test is not identified.

"...\dotnet.exe" exec --runtimeconfig System.Diagnostics.Process.Tests.runtimeconfig.json --depsfile System.Diagnostics.Process.Tests.deps.json xunit.console.dll System.Diagnostics.Process.Tests.dll -xml testResults.xml -nologo -nocolor -notrait category=IgnoreForCI -notrait category=OuterLoop -notrait category=failing
  Discovering: System.Diagnostics.Process.Tests (method display = ClassAndMethod, method display options = None)
  Discovered:  System.Diagnostics.Process.Tests (found 423 of 451 test cases)
  Starting:    System.Diagnostics.Process.Tests (parallel test collections = on [4 threads], stop on fail = off)
    System.Diagnostics.Tests.ProcessStartInfoTests.ShellExecute_Nano_Fails_Start [SKIP]
      Condition(s) not met: "IsWindowsNanoServer"
    System.Diagnostics.Tests.ProcessTests.NonElevatedUser_QueryProcessNameOfSystemProcess [SKIP]
      Condition(s) not met: "IsNotPrivilegedProcess"
Invalid number of parameters
0 File(s) copied
['System.Diagnostics.Process.Tests' END OF WORK ITEM LOG: Command timed out, and was killed]

Configuration: net11.0-windows-Debug-x86-coreclr_checked-Windows.10.Amd64.Open, Helix job e45775cb-103a-475f-9f07-250ab1a48c98.

Error Message

{
  "ErrorMessage": ["Starting:    System.Diagnostics.Process.Tests", "['System.Diagnostics.Process.Tests' END OF WORK ITEM LOG: Command timed out, and was killed]"],
  "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

Note

This issue was drafted with GitHub Copilot assistance.

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1618965
Error message validated: [Starting: System.Diagnostics.Process.Tests ['System.Diagnostics.Process.Tests' END OF WORK ITEM LOG: Command timed out, and was killed]]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 10/1/2026 4:30:43 AM UTC

Report

Build Repository Test Pull Request
1620461 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #135048
1620531 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #134843
1620523 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #135072
1620515 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #134982
1620493 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #134969
1620478 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #134811
1620439 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #135065
1620445 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #135067
1620456 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #135068
1620437 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #135066
1620430 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #135044
1620435 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #135064
1620471 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #135069
1620394 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #134966
1620359 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #133659
1620355 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #133658
1620360 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #133662
1620357 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #133660
1620344 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #133890
1620313 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #134623
1620322 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #134978
1620310 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #134965
1620252 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #133918
1620148 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #133696
1620057 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #134185
1620010 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #134642
1619978 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #135040
1619952 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #135038
1619920 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #135028
1619895 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #133918
1619875 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #132861
1619885 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #134962
1619863 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #132584
1618922 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #134875
1619771 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #134871
1619554 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #134991
1619748 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #134618
1619688 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #130141
1619717 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #135026
1619692 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #130768
1619667 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #134813
1619659 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #134221
1619646 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #135022
1619621 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #135020
1619585 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #134898
1618965 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #134960
1619482 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #132788
1619426 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #134971
1619421 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #129806
1619418 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #131265
1619355 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #135005
1619328 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #134642
1619283 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #132788
1619263 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #134991
1619247 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #134993
1619118 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #135000
1619114 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #134883
1619111 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #134843
1618998 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #134978

Summary

24-Hour Hit Count 7-Day Hit Count 1-Month Count
58 59 59

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    Known Build ErrorUse this to report build issues in the .NET Helix tabarea-System.Diagnostics.Processblocking-clean-ciBlocking PR or rolling runs of 'runtime' or 'runtime-extra-platforms'untriagedNew issue has not been triaged by the area owner

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