ProcessThreadTests.TestStartTimeProperty failure in CI

[jkotas]

    System.Diagnostics.Tests.ProcessThreadTests.TestStartTimeProperty [FAIL]
      Assert.Single() Failure: The collection did not contain any matching items
      Expected:   (predicate expression)
      Collection: [System.Diagnostics.ProcessThread, System.Diagnostics.ProcessThread, System.Diagnostics.ProcessThread, System.Diagnostics.ProcessThread, System.Diagnostics.ProcessThread, ···]
      Stack Trace:
        /_/src/libraries/System.Diagnostics.Process/tests/ProcessThreadTests.cs(156,0): at System.Diagnostics.Tests.ProcessThreadTests.<>c__DisplayClass4_2.<TestStartTimeProperty>b__0()
        /_/src/libraries/System.Private.CoreLib/src/System/Threading/Tasks/Task.cs(2396,0): at System.Threading.Tasks.Task.InnerInvoke()
        /_/src/libraries/System.Private.CoreLib/src/System/Threading/Tasks/Task.cs(2384,0): at System.Threading.Tasks.Task.<>c.<.cctor>b__292_0(Object obj)
        /_/src/libraries/System.Private.CoreLib/src/System/Threading/ExecutionContext.cs(179,0): at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
        --- End of stack trace from previous location ---
        /_/src/libraries/System.Private.CoreLib/src/System/Threading/ExecutionContext.cs(203,0): at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
        /_/src/libraries/System.Private.CoreLib/src/System/Threading/Tasks/Task.cs(2342,0): at System.Threading.Tasks.Task.ExecuteWithThreadLocal(Task& currentTaskSlot, Thread threadPoolThread)
        --- End of stack trace from previous location ---
        /_/src/libraries/System.Diagnostics.Process/tests/ProcessThreadTests.cs(149,0): at System.Diagnostics.Tests.ProcessThreadTests.TestStartTimeProperty()
        --- End of stack trace from previous location ---

Build Information

Build: https://dev.azure.com/dnceng-public/cbb18261-c48f-4abb-8651-8cdcb5474649/_build/results?buildId=755830
Build error leg or test failing: System.Diagnostics.Tests.ProcessThreadTests.TestStartTimeProperty
Pull request: #105519

Error Message

Fill the error message using step by step known issues guidance.

{
  "ErrorMessage": ["System.Diagnostics.Tests.ProcessThreadTests.TestStartTimeProperty [FAIL]","The collection did not contain any matching items"],
  "ErrorPattern": "",
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=755830
Error message validated: [System.Diagnostics.Tests.ProcessThreadTests.TestStartTimeProperty [FAIL] The collection did not contain any matching items]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 7/26/2024 12:06:54 AM UTC

Report

Build	Definition	Test	Pull Request
902315	dotnet/runtime	System.Diagnostics.Tests.ProcessThreadTests.TestStartTimeProperty	#110915
900648	dotnet/runtime	System.Diagnostics.Tests.ProcessThreadTests.TestStartTimeProperty	#110849
898851	dotnet/runtime	System.Diagnostics.Tests.ProcessThreadTests.TestStartTimeProperty	#110372
896640	dotnet/runtime	System.Diagnostics.Tests.ProcessThreadTests.TestStartTimeProperty	#110676
893658	dotnet/runtime	System.Diagnostics.Tests.ProcessThreadTests.TestStartTimeProperty	#109087
890338	dotnet/runtime	System.Diagnostics.Tests.ProcessThreadTests.TestStartTimeProperty	#110478
888644	dotnet/runtime	System.Diagnostics.Tests.ProcessThreadTests.TestStartTimeProperty	#110479
888561	dotnet/runtime	System.Diagnostics.Tests.ProcessThreadTests.TestStartTimeProperty	#110476
881227	dotnet/runtime	System.Diagnostics.Tests.ProcessThreadTests.TestStartTimeProperty	#110232
881204	dotnet/runtime	System.Diagnostics.Tests.ProcessThreadTests.TestStartTimeProperty	#109901

Summary

24-Hour Hit Count	7-Day Hit Count	1-Month Count
0	2	10

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[jozkee]

#104972 was an attempt to fix it but looks like ProcessInfo.Threads is not being Refresh()'d properly.

[adamsitnik]

I wonder why it fails only on Mono?