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[ci-scan] Test failure: System.Diagnostics.Tests.PerformanceCounterCategoryTests.PerformanceCounterCategory_InstanceExists_Static #134904
Description
Build Information
Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1616817
Build error leg or test failing: windows-x86 Release Libraries_NET481-System.Diagnostics.PerformanceCounter.Tests
Pull request: #134758
KBE authoring guidance (ci-failure-scan)
Error Detailsis 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. ErrorMessageis a case-sensitive ordinalString.Containssubstring copied verbatim from the failing log.- Set
BuildRetrytotrueonly for a clear infrastructure retry case.ExcludeConsoleLogdisables Helix console-log scanning.
Error Details
Helix job 1d4f20b5-4f33-44bf-8afe-9f9065175ff1, queue windows.10.amd64.client.open.rt (.NET Framework 4.8.1, x86). PerformanceCounterCategory("Processor").GetInstanceNames() returned no instances on the Helix machine. The PR under test only changes the Wasm JIT, so it doesn't touch this code path.
System.Diagnostics.Tests.PerformanceCounterCategoryTests.PerformanceCounterCategory_InstanceExists_Static [FAIL]
Expected: 0 to be greater than 0 PerformanceCounterCategory.GetInstanceNames() returned 0.
Stack Trace:
/_/src/libraries/Common/tests/TestUtilities/System/AssertExtensions.cs(335,0): at System.AssertExtensions.GreaterThan[T](T actual, T greaterThan, String userMessage)
/_/src/libraries/System.Diagnostics.PerformanceCounter/tests/PerformanceCounterCategoryTests.cs(282,0): at System.Diagnostics.Tests.PerformanceCounterCategoryTests.PerformanceCounterCategory_InstanceExists_Static()
Error Message
{
"ErrorMessage": [
"PerformanceCounterCategoryTests.PerformanceCounterCategory_InstanceExists_Static [FAIL]",
"PerformanceCounterCategory.GetInstanceNames() returned 0."
],
"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 generated with GitHub Copilot assistance.
Known issue validation
Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1616817
Error message validated: [PerformanceCounterCategoryTests.PerformanceCounterCategory_InstanceExists_Static [FAIL] PerformanceCounterCategory.GetInstanceNames() returned 0.]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 9/29/2026 11:28:18 PM UTC
Report
| Build | Repository | Test | Pull Request |
|---|---|---|---|
| 1616817 | dotnet/runtime | System.Diagnostics.Tests.PerformanceCounterCategoryTests.PerformanceCounterCategory_InstanceExists_Static | #134758 |
Summary
| 24-Hour Hit Count | 7-Day Hit Count | 1-Month Count |
|---|---|---|
| 0 | 0 | 1 |
Activity
MihuBot commentedon Sep 29, 2026
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