Microsoft.Extensions.FileProviders.Physical.Tests Failing With DirectoryNotFoundException

[steveisok]

I'm seeing intermittent failures across both runtimes that end up with the following exception:

Unhandled Exception:
System.IO.DirectoryNotFoundException: Could not find a part of the path '/tmp/gq0eerpt.0j2'.
   at System.IO.Enumeration.FileSystemEnumerator`1[[System.IO.FileSystemInfo, System.IO.FileSystem, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a]].CreateDirectoryHandle(String path, Boolean ignoreNotFound) in /_/src/libraries/System.IO.FileSystem/src/System/IO/Enumeration/FileSystemEnumerator.Unix.cs:line 79
   at System.IO.Enumeration.FileSystemEnumerator`1[[System.IO.FileSystemInfo, System.IO.FileSystem, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a]].Init() in /_/src/libraries/System.IO.FileSystem/src/System/IO/Enumeration/FileSystemEnumerator.Unix.cs:line 39
   at System.IO.Enumeration.FileSystemEnumerator`1[[System.IO.FileSystemInfo, System.IO.FileSystem, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a]]..ctor(String directory, Boolean
...

Here's a helix log from 44611 for reference.

This seemed to have happened at least 16 times in the last day.

[danmoseley]

@eerhardt I can't look right now but didn't this recently change to stop polling? Maybe that made this more common?

[eerhardt]

These tests were just changed with #41426.

cc @ericstj @maryamariyan

[ghost]

Tagging subscribers to this area: @maryamariyan
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Issue Details

Description:	I'm seeing intermittent failures across both runtimes that end up with the following exception: Unhandled Exception: System.IO.DirectoryNotFoundException: Could not find a part of the path '/tmp/gq0eerpt.0j2'. at System.IO.Enumeration.FileSystemEnumerator`1[[System.IO.FileSystemInfo, System.IO.FileSystem, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a]].CreateDirectoryHandle(String path, Boolean ignoreNotFound) in /_/src/libraries/System.IO.FileSystem/src/System/IO/Enumeration/FileSystemEnumerator.Unix.cs:line 79 at System.IO.Enumeration.FileSystemEnumerator`1[[System.IO.FileSystemInfo, System.IO.FileSystem, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a]].Init() in /_/src/libraries/System.IO.FileSystem/src/System/IO/Enumeration/FileSystemEnumerator.Unix.cs:line 39 at System.IO.Enumeration.FileSystemEnumerator`1[[System.IO.FileSystemInfo, System.IO.FileSystem, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a]]..ctor(String directory, Boolean ... Here's a helix log from 44611 for reference. This seemed to have happened at least 16 times in the last day.
Author:	steveisok
Assignees:	-
Labels:	area-Extensions-FileSystem, untriaged
Milestone:	-

[ericstj]

I’ll fix this. I introduced with the inotify test. What’s happening is that the timer thread doesn’t fire until after the test is done and disposing the watcher didn’t successfully cancel it. I had a fix for this but pulled it out after I stopped seeing the problem. For now the quickest fix is to move inotify test to outer loop.

[stephentoub]

Reopening to track actually fixing the (now outerloop) test.

Related to #44652.

[ericstj]

@stephentoub my intent was to use the new issue to track a better fix to the outerloop test.