[ci-scan] Test failure: NameConfigWithPid Broken pipe on macOS

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Đánh giá

Độ khó
4/5
Thời gian dự kiến
3-5 ngày
Mức phù hợp với người mới
22/100
Loại issue
Lỗi
Độ rõ ràng
Khá rõ ràng
Mức độ hoạt động
Sôi nổi
Công nghệ
csharp, macos
Lĩnh vực
observability

Hướng nghiên cứu

Start with the failing test tracing/eventpipe/config/name_config_with_pid and its NameConfigWithPid.Main entry point, then read the linked Helix console log to see where the pipe writer is flushed. The cause is not established, so first reproduce the broken pipe on macOS, then find out why the writer's peer closes early. Done means the test passes reliably on the macOS x64 leg, or the root cause is documented with a fix.

Do mô hình lập chỉ mục viết ra từ nội dung của issue.

Mô tả

agentic-workflows area-System.Diagnostics blocking-clean-ci Known Build Error untriaged

Build Information

Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1659123
Build error leg or test failing: macOS x64 crossgen2 composite / no-tiered-compilation runtime tests-tracing/eventpipe/config/name_config_with_pid/name_config_with_pid
Pipeline: runtime-coreclr crossgen2 outerloop, definition 134, main.
Queue: osx.15.amd64.open.
First build it occurred: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1646416 (finished 2026-10-23; earliest verified in the sampled window, not an established introduction).
Follow-up build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1661208 (finished 2026-11-03), identical ordered exception and entry-point stack frame.

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

NameConfigWithPid.Main fails while flushing its pipe writer. The exception and entry-point frame below occur in the same contiguous failing-test stack; this is not a generic network-error or shared-harness match. No underlying cause is established by this scan.

The ordered pair was verified in nine distinct source-and-prior builds: 1646416, 1647811, 1648274, 1648697, 1653815, 1655529, 1657378, 1658441, and 1659123, and again in follow-up 1661208. Eleven source-and-prior build inventories were inspected. The true origin may predate 2026-10-23; absence of this signature from other sampled failed builds is not proof of a product fix or a passing affected leg.

Source console: https://helixr1107v0xdeko0k025g8.blob.core.windows.net/dotnet-runtime-refs-heads-main-1edd865f76ca4b4ab2/tracing/1/console.4ecdd31e.log?helixlogtype=result

Running test: tracing/eventpipe/config/name_config_with_pid/name_config_with_pid.cmd
Unhandled exception. System.IO.IOException: Broken pipe
 ---> System.Net.Sockets.SocketException (32): Broken pipe
   at System.Net.Sockets.Socket.Send(ReadOnlySpan`1 buffer, SocketFlags socketFlags) in /_/src/libraries/System.Net.Sockets/src/System/Net/Sockets/Socket.cs:line 1243
   at System.IO.Pipes.PipeStream.WriteCore(ReadOnlySpan`1 buffer) in /_/src/libraries/System.IO.Pipes/src/System/IO/Pipes/PipeStream.Unix.cs:line 293
   --- End of inner exception stack trace ---
   at System.IO.Pipes.PipeStream.WriteCore(ReadOnlySpan`1 buffer) in /_/src/libraries/System.IO.Pipes/src/System/IO/Pipes/PipeStream.Unix.cs:line 299
   at System.IO.StreamWriter.Flush(Boolean flushStream, Boolean flushEncoder)
   at System.IO.StreamWriter.WriteLine(String value)
   at NameConfigWithPid.Main(String[] args)

Error Message

{
  "ErrorMessage": [
    "Unhandled exception. System.IO.IOException: Broken pipe",
    "   at NameConfigWithPid.Main(String[] args)"
  ],
  "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

Both elements match twice, in order, within the failing test's exception output. The repetition is direct output plus the harness copy, not two independent occurrences. No passing or skipped matches were found. Both ordered elements also match the selected follow-up console.

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]
Generated by GitHub Copilot.

Generated by CI Outer-Loop Failure Scanner · copilot · gpt61 · ~907 AIC · ⌖ ~13 AIC · ⊞ 33.3K · ◷

Report
Build Repository Test Pull Request
1665289 dotnet/runtime OutOfProcessTest.tracing/eventpipe/config/name_config_with_pid/name_config_with_pid.cmd
1663236 dotnet/runtime OutOfProcessTest.tracing/eventpipe/config/name_config_with_pid/name_config_with_pid.cmd
Summary
24-Hour Hit Count 7-Day Hit Count 1-Month Count
1 2 2
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