[6.0] Microsoft.Extensions.FileProviders.Physical.Tests failing to access a symlink used by PhysicalFilesWatcher

[carlossanlop]

Build Information

Build: https://dev.azure.com/dnceng-public/public/public%20Team/_build/results?buildId=737840 Build error leg or test failing: Libraries Test Run release coreclr windows x64 Debug - Microsoft.Extensions.FileProviders.Physical.Tests

Error Message

{
  "ErrorMessage" : [
    "System.UnauthorizedAccessException: Access to the path",
    "PhysicalFilesWatcher.cs"
  ],
  "BuildRetry" : false,
  "ExcludeConsoleLog" : false
}

• PR: https://github.com/dotnet/runtime/pull/104748
• Queue: Libraries Test Run release coreclr windows x64 Debug
• Job result: https://dev.azure.com/dnceng-public/public/_build/results?buildId=737840&view=logs&j=cb131f87-d5af-5ecc-6e5f-6dc86994859c&t=76503e0a-8c41-542c-43da-63a4758a95b0
• Log file: https://helixre107v0xd1eu3ibi6ka.blob.core.windows.net/dotnet-runtime-refs-pull-104748-merge-8ea65ffd74cf4a6f89/Microsoft.Extensions.FileProviders.Physical.Tests/1/console.bad6be3c.log?helixlogtype=result
• Output:

  
  ===========================================================================================================

C:\h\w\BADD098E\w\B26B0998\e>"C:\h\w\BADD098E\p\dotnet.exe" exec --runtimeconfig Microsoft.Extensions.FileProviders.Physical.Tests.runtimeconfig.json --depsfile Microsoft.Extensions.FileProviders.Physical.Tests.deps.json xunit.console.dll Microsoft.Extensions.FileProviders.Physical.Tests.dll -xml testResults.xml -nologo -nocolor -notrait category=IgnoreForCI -notrait category=OuterLoop -notrait category=failing
Discovering: Microsoft.Extensions.FileProviders.Physical.Tests (method display = ClassAndMethod, method display options = None) Discovered: Microsoft.Extensions.FileProviders.Physical.Tests (found 83 of 92 test cases) Starting: Microsoft.Extensions.FileProviders.Physical.Tests (parallel test collections = on, max threads = 2) Unhandled exception. System.UnauthorizedAccessException: Access to the path 'C:\h\w\BADD098E\t\x3dfgyya.35z\2visikrv.aco' is denied. at System.IO.FileSystem.GetFinalLinkTarget(String linkPath, Boolean isDirectory) in //src/libraries/System.Private.CoreLib/src/System/IO/FileSystem.Windows.cs:line 585 at System.IO.FileSystem.ResolveLinkTarget(String linkPath, Boolean returnFinalTarget, Boolean isDirectory) in //src/libraries/System.Private.CoreLib/src/System/IO/FileSystem.Windows.cs:line 422 at System.IO.FileSystemInfo.ResolveLinkTarget(Boolean returnFinalTarget) in //src/libraries/System.Private.CoreLib/src/System/IO/FileSystemInfo.cs:line 170 at Microsoft.Extensions.FileProviders.Physical.FileSystemInfoHelper.GetFileLinkTargetLastWriteTimeUtc(FileInfo fileInfo) in //src/libraries/Microsoft.Extensions.FileProviders.Physical/src/Internal/FileSystemInfoHelper.cs:line 56 at Microsoft.Extensions.FileProviders.Physical.PollingFileChangeToken.GetLastWriteTimeUtc() in /_/src/libraries/Microsoft.Extensions.FileProviders.Physical/src/PollingFileChangeToken.cs:line 57 at Microsoft.Extensions.FileProviders.Physical.PollingFileChangeToken.getHasChanged() in //src/libraries/Microsoft.Extensions.FileProviders.Physical/src/PollingFileChangeToken.cs:line 101 at Microsoft.Extensions.FileProviders.Physical.PhysicalFilesWatcher.RaiseChangeEvents(Object state) in //src/libraries/Microsoft.Extensions.FileProviders.Physical/src/PhysicalFilesWatcher.cs:line 476 at System.Threading.TimerQueueTimer.Fire(Boolean isThreadPool) in //src/libraries/System.Private.CoreLib/src/System/Threading/Timer.cs:line 673 at System.Threading.TimerQueue.FireNextTimers() in /_/src/libraries/System.Private.CoreLib/src/System/Threading/Timer.cs:line 326 ----- end Thu 07/11/2024 19:06:54.62 ----- exit code -532462766 ----------------------------------------------------------

<!--Known issue error report start -->

### Report
#### Summary
|24-Hour Hit Count|7-Day Hit Count|1-Month Count|
|---|---|---|
|0|0|0|
<!--Known issue error report end -->

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[adamsitnik]

We have not touched this area in 6.0, so it must be some kind of rare flakiness. I am moving it to future for now.