Diagnose more gRPC template hangs

[JunTaoLuo]

The symptoms under diagnosis:

[0.028s] [TestLifetime] [Information] Starting test GrpcTemplate at 2020-03-26T04:44:10
[9,535.658s] [TestLogger] [Information] AspNetProcess - process: /Users/runner/runners/2.165.2/work/1/s/.dotnet/dotnet arguments: exec /Users/runner/runners/2.165.2/work/1/s/src/ProjectTemplates/test/bin/Release/netcoreapp5.0/TestTemplates/AspNet.grpc.mnuhnsvae3x/bin/Debug/netcoreapp5.0/AspNet.grpc.mnuhnsvae3x.dll
[9,535.669s] [TestLogger] [Information] AspNetProcess - process started

This could be an issue in our test setup (creating, publishing and building the SUT) or it could be an issue with the project template infrastructure (uninstalling/installing the project template via dotnet new --install).

[JunTaoLuo]

[0.054s] [TestLifetime] [Information] Starting test GrpcTemplate at 2020-03-29T19:30:10
[0.054s] [TestLogger] [Information] GrpcTemplateTest - Test start
[18.267s] [TestLogger] [Information] GrpcTemplateTest - Initialize project
[57.831s] [TestLogger] [Information] GrpcTemplateTest - Created project
[95.133s] [TestLogger] [Information] GrpcTemplateTest - published project
[134.298s] [TestLogger] [Information] GrpcTemplateTest - built project
[134.299s] [TestLogger] [Information] GrpcTemplateTest - Starting built project
[134.303s] [TestLogger] [Information] Project - creating AspNetProcess
[134.305s] [TestLogger] [Information] AspNetProcess - initializing
[134.312s] [TestLogger] [Information] AspNetProcess - http client created
[134.312s] [TestLogger] [Information] AspNetProcess/EnsureDevelopmentCertificates - start
[9,573.174s] [TestLogger] [Information] AspNetProcess/EnsureDevelopmentCertificates - end
[9,573.174s] [TestLogger] [Information] AspNetProcess - development certificates resolved
[9,573.174s] [TestLogger] [Information] AspNetProcess - process: /Users/runner/runners/2.165.2/work/1/s/.dotnet/dotnet arguments: exec /Users/runner/runners/2.165.2/work/1/s/src/ProjectTemplates/test/bin/Release/netcoreapp5.0/TestTemplates/AspNet.grpc.nsi20enodmc/bin/Debug/netcoreapp5.0/AspNet.grpc.nsi20enodmc.dll
[9,573.179s] [TestLogger] [Information] AspNetProcess - process started
[9,573.179s] [TestLogger] [Information] GrpcTemplateTest - Verifing built project results
[9,574.049s] [TestLogger] [Information] GrpcTemplateTest - Verifing published project results
[9,574.726s] [TestLifetime] [Information] Finished test GrpcTemplate in 9575.1650592s

This pretty much conclusively proves that the hang is within https://github.com/dotnet/aspnetcore/blob/master/src/Shared/CertificateGeneration/CertificateManager.cs#L727.

Who would be knowledgeable in this area? @mkArtakMSFT @anurse @javiercn. Not sure if it's relevant but we recently changed the macOS agent from 10.13 to 10.14.

[analogrelay]

@javiercn is probably the one who's made changes there.

[JunTaoLuo]

@javiercn thinks he fixed the hangs with #20494. We'll turn the tests back on.