System.Threading.ThreadPools.Tests.ThreadPoolTests.CooperativeBlockingCanCreateThreadsFaster has failed

[ilonatommy]

Failing in rolling build: Libraries Test Run release coreclr OSX x64 Release, but not every time. In 20220315.1 and 20220315.4 it failed, then in 20220316.1 it passed and in 20220316.4 it failed again.

The error:

Unhandled exception. Xunit.Sdk.TrueException: Assert.True() Failure
Expected: True
Actual:   False
   at System.Threading.ThreadPools.Tests.ThreadPoolTests.<>c.<CooperativeBlockingCanCreateThreadsFaster>b__38_0() in /_/src/libraries/System.Threading.ThreadPool/tests/ThreadPoolTests.cs:line 953
--- End of stack trace from previous location ---
   at Microsoft.DotNet.RemoteExecutor.Program.Main(String[] args) in /_/src/Microsoft.DotNet.RemoteExecutor/src/Program.cs:line 94
    System.Threading.ThreadPools.Tests.ThreadPoolTests.CooperativeBlockingCanCreateThreadsFaster [FAIL]
      Microsoft.DotNet.RemoteExecutor.RemoteExecutionException : Remote process failed with an unhandled exception.
      Stack Trace:
        
        Child exception:
          Xunit.Sdk.TrueException: Assert.True() Failure
        Expected: True
        Actual:   False
        /_/src/libraries/System.Threading.ThreadPool/tests/ThreadPoolTests.cs(953,0): at System.Threading.ThreadPools.Tests.ThreadPoolTests.<>c.<CooperativeBlockingCanCreateThreadsFaster>b__38_0()
        
        Child process:
          System.Threading.ThreadPool.Tests, Version=7.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51 System.Threading.ThreadPools.Tests.ThreadPoolTests+<>c Void <CooperativeBlockingCanCreateThreadsFaster>b__38_0()

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Issue Details

---

Failing in rolling build: Libraries Test Run release coreclr OSX x64 Release, but not every time. In 20220315.1 and 20220315.4 it failed, then in 20220316.1 it passed and in 20220316.4 it failed again.

The error:

Unhandled exception. Xunit.Sdk.TrueException: Assert.True() Failure
Expected: True
Actual:   False
   at System.Threading.ThreadPools.Tests.ThreadPoolTests.<>c.<CooperativeBlockingCanCreateThreadsFaster>b__38_0() in /_/src/libraries/System.Threading.ThreadPool/tests/ThreadPoolTests.cs:line 953
--- End of stack trace from previous location ---
   at Microsoft.DotNet.RemoteExecutor.Program.Main(String[] args) in /_/src/Microsoft.DotNet.RemoteExecutor/src/Program.cs:line 94
    System.Threading.ThreadPools.Tests.ThreadPoolTests.CooperativeBlockingCanCreateThreadsFaster [FAIL]
      Microsoft.DotNet.RemoteExecutor.RemoteExecutionException : Remote process failed with an unhandled exception.
      Stack Trace:
        
        Child exception:
          Xunit.Sdk.TrueException: Assert.True() Failure
        Expected: True
        Actual:   False
        /_/src/libraries/System.Threading.ThreadPool/tests/ThreadPoolTests.cs(953,0): at System.Threading.ThreadPools.Tests.ThreadPoolTests.<>c.<CooperativeBlockingCanCreateThreadsFaster>b__38_0()
        
        Child process:
          System.Threading.ThreadPool.Tests, Version=7.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51 System.Threading.ThreadPools.Tests.ThreadPoolTests+<>c Void <CooperativeBlockingCanCreateThreadsFaster>b__38_0()

Author:	ilonatommy
Assignees:	-
Labels:	area-System.Threading, untriaged
Milestone:	-

[ilonatommy]

@kouvel, any ideas what might have caused it?

[kouvel]

I guess the test may occasionally time out if it's running in parallel with other tests, depending on what those other tests are doing. Trying a fix here: #66765

[ilonatommy]

@kouvel, thank you for looking into it but even on the #66765 the check failed so it seems it's not the fix we're looking for. How else can we get rid of this error?

[kouvel]

All of those failures appear to be crashes on Mono. Maybe the in-proc event listener is not fully implemented there. I'll file an issue and disable the test on Mono for now.

[kouvel]

Closing as a duplicate of #66852, which seems to be tracking failures of this test elsewhere by a bot