ServerAsyncAuthenticateTest.ServerAsyncAuthenticate_MismatchProtocols_Fails test failure

[safern]

I just saw this test failed in one CI run:

Assert.IsAssignableFrom() Failure\nExpected: typeof(System.Security.Authentication.AuthenticationException)\nActual: typeof(System.TimeoutException)

Stack Trace

at System.Net.Security.Tests.ServerAsyncAuthenticateTest.ServerAsyncAuthenticate_MismatchProtocols_Fails(SslProtocols serverProtocol, SslProtocols clientProtocol, Type expectedException) in /_/src/System.Net.Security/tests/FunctionalTests/ServerAsyncAuthenticateTest.cs:line 62
--- End of stack trace from previous location where exception was thrown ---

https://dev.azure.com/dnceng/public/_build/results?buildId=198444&view=ms.vss-test-web.build-test-results-tab&runId=4812722&resultId=483559&paneView=debug

Failed on: dotnet/corefx#37888
cc: @ViktorHofer @stephentoub @wfurt

[wfurt]

last failure7/27 and it was failing consistently before on single queue. Probably broken by upgrades on environment. Not actionable now.

[wfurt]

I saw failure again on Linux. I'll reopen this, disable test and I'll investigate.

[karelz]

Fixed in PR #35549 (comment) (incl. test re-enabled)

[wfurt]

It failed again. It is curious it timed out after 1.3s (in Debug OSX build)

     <test name="System.Net.Security.Tests.ServerAsyncAuthenticateTest.ServerAsyncAuthenticate_MismatchProtocols_Fails(serverProtocol: Tls12, clientProtocol: Tls11, expectedException: typeof(System.Security.Authentication.AuthenticationException))" type="System.Net.Security.Tests.ServerAsyncAuthenticateTest" method="ServerAsyncAuthenticate_MismatchProtocols_Fails" time="1.1337415" result="Fail">
        <failure exception-type="Xunit.Sdk.IsAssignableFromException">
          <message><![CDATA[Assert.IsAssignableFrom() Failure\nExpected: typeof(System.Security.Authentication.AuthenticationException)\nActual:   typeof(System.TimeoutException)]]></message>
          <stack-trace><![CDATA[   at System.Net.Security.Tests.ServerAsyncAuthenticateTest.ServerAsyncAuthenticate_MismatchProtocols_Fails(SslProtocols serverProtocol, SslProtocols clientProtocol, Type expectedException) in /_/src/libraries/System.Net.Security/tests/FunctionalTests/ServerAsyncAuthenticateTest.cs:line 62
--- End of stack trace from previous location ---]]></stack-trace>
        </failure>
      </test>

[safern]

Adding builds impacted by this. I just saw instances of this in rolling builds and PRs:

Builds

Build	Pull Request	Test Failure Count
#635584	#35566	1
#635689	#36047	1
#635943	#35366	1
#636029	#36082	1
#636084	#36088	1
#636157	#36098	1
#636424	#36104	1
#636769	#35366	1
#636778	Rolling	1
#636800	#35925	1
#636821	#35936	1

Configurations

• net5.0-Linux-Debug-x64-CoreCLR_checked-Ubuntu.1804.Amd64.Open
• net5.0-Linux-Debug-x64-CoreCLR_release-Ubuntu.1604.Amd64.Open
• net5.0-Linux-Debug-x64-CoreCLR_release-Ubuntu.1804.Amd64.Open
• net5.0-Linux-Release-x64-CoreCLR_release-(Fedora.29.Amd64.Open)ubuntu.1604.amd64.open@mcr.microsoft.com/dotnet-buildtools/prereqs:fedora-29-helix-a12566d-20191210224553
• net5.0-OSX-Debug-x64-CoreCLR_checked-OSX.1013.Amd64.Open
• net5.0-OSX-Debug-x64-CoreCLR_release-OSX.1013.Amd64.Open
• net5.0-Windows_NT-Debug-x64-CoreCLR_checked-Windows.10.Amd64.Open

Helix Logs

Build	Pull Request	Console	Core	Test Results	Run Client
#635584	#35566	console.log		testResults.xml	run_client.py
#635689	#36047	console.log		testResults.xml	run_client.py
#635943	#35366	console.log		testResults.xml	run_client.py
#636029	#36082	console.log		testResults.xml	run_client.py
#636084	#36088	console.log		testResults.xml	run_client.py
#636157	#36098	console.log		testResults.xml	run_client.py
#636424	#36104	console.log		testResults.xml	run_client.py
#636769	#35366	console.log		testResults.xml	run_client.py
#636778	Rolling	console.log		testResults.xml	run_client.py
#636800	#35925	console.log		testResults.xml	run_client.py
#636821	#35936	console.log		testResults.xml	run_client.py