CollectionRuleDescriptionPipeline_ExecutingAction frequently fails

[jander-msft]

Example runs shows all other test assemblies complete except for Microsoft.Diagnostics.Monitoring.Tool.UnitTests

From https://dev.azure.com/dnceng/internal/_build/results?buildId=1920870&view=logs&j=f7f357da-a3cf-5dd3-839e-60598f8ae479&t=15212ef2-0ddb-55f2-588c-a7e616b9080b:

  Running tests: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.OpenApiGen.UnitTests/Release/net6.0/Microsoft.Diagnostics.Monitoring.OpenApiGen.UnitTests.dll [net6.0|x64]
  Running tests: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.ConfigurationSchema.UnitTests/Release/net6.0/Microsoft.Diagnostics.Monitoring.ConfigurationSchema.UnitTests.dll [net6.0|x64]
  Running tests: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests/Release/netcoreapp3.1/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests.dll [netcoreapp3.1|x64]
  Running tests: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests/Release/netcoreapp3.1/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests.dll [netcoreapp3.1|x64]
  Tests succeeded: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests/Release/netcoreapp3.1/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests.dll [netcoreapp3.1|x64]
  Running tests: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests/Release/net5.0/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests.dll [net5.0|x64]
  Tests succeeded: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests/Release/netcoreapp3.1/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests.dll [netcoreapp3.1|x64]
  Running tests: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests/Release/net5.0/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests.dll [net5.0|x64]
  Tests succeeded: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.OpenApiGen.UnitTests/Release/net6.0/Microsoft.Diagnostics.Monitoring.OpenApiGen.UnitTests.dll [net6.0|x64]
  Running tests: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.Tool.UnitTests/Release/netcoreapp3.1/Microsoft.Diagnostics.Monitoring.Tool.UnitTests.dll [netcoreapp3.1|x64]
  Tests succeeded: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.ConfigurationSchema.UnitTests/Release/net6.0/Microsoft.Diagnostics.Monitoring.ConfigurationSchema.UnitTests.dll [net6.0|x64]
  Running tests: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.Profiler.UnitTests/Release/net6.0/Microsoft.Diagnostics.Monitoring.Profiler.UnitTests.dll [net6.0|x64]
  Tests succeeded: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests/Release/net5.0/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests.dll [net5.0|x64]
  Running tests: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests/Release/net6.0/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests.dll [net6.0|x64]
  Tests succeeded: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests/Release/net5.0/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests.dll [net5.0|x64]
  Running tests: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests/Release/net6.0/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests.dll [net6.0|x64]
  Tests succeeded: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests/Release/net6.0/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests.dll [net6.0|x64]
  Tests succeeded: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.Profiler.UnitTests/Release/net6.0/Microsoft.Diagnostics.Monitoring.Profiler.UnitTests.dll [net6.0|x64]
  Tests succeeded: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests/Release/net6.0/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests.dll [net6.0|x64]

From https://dev.azure.com/dnceng/internal/_build/results?buildId=1920870&view=logs&j=ff12bfb1-0d59-58d3-869b-b093d15cf879&t=55fdbabf-751c-55d8-ebf5-2ddc3b5e026b:

  Running tests: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.OpenApiGen.UnitTests/Release/net6.0/Microsoft.Diagnostics.Monitoring.OpenApiGen.UnitTests.dll [net6.0|x64]
  Running tests: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.ConfigurationSchema.UnitTests/Release/net6.0/Microsoft.Diagnostics.Monitoring.ConfigurationSchema.UnitTests.dll [net6.0|x64]
  Running tests: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests/Release/netcoreapp3.1/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests.dll [netcoreapp3.1|x64]
  Running tests: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests/Release/netcoreapp3.1/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests.dll [netcoreapp3.1|x64]
  Tests succeeded: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests/Release/netcoreapp3.1/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests.dll [netcoreapp3.1|x64]
  Running tests: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests/Release/net5.0/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests.dll [net5.0|x64]
  Tests succeeded: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests/Release/netcoreapp3.1/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests.dll [netcoreapp3.1|x64]
  Running tests: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests/Release/net5.0/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests.dll [net5.0|x64]
  Tests succeeded: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.OpenApiGen.UnitTests/Release/net6.0/Microsoft.Diagnostics.Monitoring.OpenApiGen.UnitTests.dll [net6.0|x64]
  Running tests: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.Tool.UnitTests/Release/netcoreapp3.1/Microsoft.Diagnostics.Monitoring.Tool.UnitTests.dll [netcoreapp3.1|x64]
  Tests succeeded: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.ConfigurationSchema.UnitTests/Release/net6.0/Microsoft.Diagnostics.Monitoring.ConfigurationSchema.UnitTests.dll [net6.0|x64]
  Running tests: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.Profiler.UnitTests/Release/net6.0/Microsoft.Diagnostics.Monitoring.Profiler.UnitTests.dll [net6.0|x64]
  Tests succeeded: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests/Release/net5.0/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests.dll [net5.0|x64]
  Running tests: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests/Release/net6.0/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests.dll [net6.0|x64]
  Tests succeeded: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests/Release/net5.0/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests.dll [net5.0|x64]
  Running tests: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests/Release/net6.0/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests.dll [net6.0|x64]
  Tests succeeded: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests/Release/net6.0/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests.dll [net6.0|x64]
  Tests succeeded: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.Profiler.UnitTests/Release/net6.0/Microsoft.Diagnostics.Monitoring.Profiler.UnitTests.dll [net6.0|x64]
  Tests succeeded: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests/Release/net6.0/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests.dll [net6.0|x64]

From https://dev.azure.com/dnceng/internal/_build/results?buildId=1920870&view=logs&j=456bb542-f04d-51f7-9ecc-588f3eb54a62&t=55b49428-0a37-5d3f-f71a-d99cc95e8e5f:

  Running tests: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.OpenApiGen.UnitTests/Debug/net6.0/Microsoft.Diagnostics.Monitoring.OpenApiGen.UnitTests.dll [net6.0|x64]
  Running tests: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.ConfigurationSchema.UnitTests/Debug/net6.0/Microsoft.Diagnostics.Monitoring.ConfigurationSchema.UnitTests.dll [net6.0|x64]
  Running tests: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests/Debug/netcoreapp3.1/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests.dll [netcoreapp3.1|x64]
  Running tests: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests/Debug/netcoreapp3.1/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests.dll [netcoreapp3.1|x64]
  Tests succeeded: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests/Debug/netcoreapp3.1/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests.dll [netcoreapp3.1|x64]
  Running tests: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests/Debug/net5.0/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests.dll [net5.0|x64]
  Tests succeeded: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests/Debug/netcoreapp3.1/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests.dll [netcoreapp3.1|x64]
  Running tests: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests/Debug/net5.0/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests.dll [net5.0|x64]
  Tests succeeded: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.OpenApiGen.UnitTests/Debug/net6.0/Microsoft.Diagnostics.Monitoring.OpenApiGen.UnitTests.dll [net6.0|x64]
  Running tests: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.Tool.UnitTests/Debug/netcoreapp3.1/Microsoft.Diagnostics.Monitoring.Tool.UnitTests.dll [netcoreapp3.1|x64]
  Tests succeeded: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.ConfigurationSchema.UnitTests/Debug/net6.0/Microsoft.Diagnostics.Monitoring.ConfigurationSchema.UnitTests.dll [net6.0|x64]
  Running tests: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.Profiler.UnitTests/Debug/net6.0/Microsoft.Diagnostics.Monitoring.Profiler.UnitTests.dll [net6.0|x64]
  Tests succeeded: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests/Debug/net5.0/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests.dll [net5.0|x64]
  Running tests: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests/Debug/net6.0/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests.dll [net6.0|x64]
  Tests succeeded: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests/Debug/net5.0/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests.dll [net5.0|x64]
  Running tests: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests/Debug/net6.0/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests.dll [net6.0|x64]
  Tests succeeded: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests/Debug/net6.0/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests.dll [net6.0|x64]
  Tests succeeded: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.Profiler.UnitTests/Debug/net6.0/Microsoft.Diagnostics.Monitoring.Profiler.UnitTests.dll [net6.0|x64]
  Tests succeeded: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests/Debug/net6.0/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests.dll [net6.0|x64]

From https://dev.azure.com/dnceng/public/_build/results?buildId=1920916&view=logs&jobId=290b4ac1-7d87-5091-2f78-d496a19b4e0b&j=f7f357da-a3cf-5dd3-839e-60598f8ae479&t=4b51f83f-6f47-574a-62a2-c224a685b501:

  Running tests: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.OpenApiGen.UnitTests/Release/net6.0/Microsoft.Diagnostics.Monitoring.OpenApiGen.UnitTests.dll [net6.0|x64]
  Running tests: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.ConfigurationSchema.UnitTests/Release/net6.0/Microsoft.Diagnostics.Monitoring.ConfigurationSchema.UnitTests.dll [net6.0|x64]
  Running tests: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests/Release/netcoreapp3.1/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests.dll [netcoreapp3.1|x64]
  Running tests: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests/Release/netcoreapp3.1/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests.dll [netcoreapp3.1|x64]
  Tests succeeded: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests/Release/netcoreapp3.1/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests.dll [netcoreapp3.1|x64]
  Running tests: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests/Release/net5.0/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests.dll [net5.0|x64]
  Tests succeeded: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests/Release/netcoreapp3.1/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests.dll [netcoreapp3.1|x64]
  Running tests: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests/Release/net5.0/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests.dll [net5.0|x64]
  Tests succeeded: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.OpenApiGen.UnitTests/Release/net6.0/Microsoft.Diagnostics.Monitoring.OpenApiGen.UnitTests.dll [net6.0|x64]
  Running tests: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.Tool.UnitTests/Release/netcoreapp3.1/Microsoft.Diagnostics.Monitoring.Tool.UnitTests.dll [netcoreapp3.1|x64]
  Tests succeeded: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.ConfigurationSchema.UnitTests/Release/net6.0/Microsoft.Diagnostics.Monitoring.ConfigurationSchema.UnitTests.dll [net6.0|x64]
  Running tests: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.Profiler.UnitTests/Release/net6.0/Microsoft.Diagnostics.Monitoring.Profiler.UnitTests.dll [net6.0|x64]
  Tests succeeded: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests/Release/net5.0/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests.dll [net5.0|x64]
  Running tests: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests/Release/net6.0/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests.dll [net6.0|x64]
  Tests succeeded: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests/Release/net5.0/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests.dll [net5.0|x64]
  Running tests: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests/Release/net6.0/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests.dll [net6.0|x64]
  Tests succeeded: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests/Release/net6.0/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests.dll [net6.0|x64]
  Tests succeeded: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.Profiler.UnitTests/Release/net6.0/Microsoft.Diagnostics.Monitoring.Profiler.UnitTests.dll [net6.0|x64]
  Tests succeeded: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests/Release/net6.0/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests.dll [net6.0|x64]

From https://dev.azure.com/dnceng/public/_build/results?buildId=1920916&view=logs&jobId=290b4ac1-7d87-5091-2f78-d496a19b4e0b&j=456bb542-f04d-51f7-9ecc-588f3eb54a62&t=0055b6ab-8e42-561f-272b-eb3b9802bf55:

  Running tests: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.OpenApiGen.UnitTests/Debug/net6.0/Microsoft.Diagnostics.Monitoring.OpenApiGen.UnitTests.dll [net6.0|x64]
  Running tests: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.ConfigurationSchema.UnitTests/Debug/net6.0/Microsoft.Diagnostics.Monitoring.ConfigurationSchema.UnitTests.dll [net6.0|x64]
  Running tests: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests/Debug/netcoreapp3.1/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests.dll [netcoreapp3.1|x64]
  Running tests: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests/Debug/netcoreapp3.1/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests.dll [netcoreapp3.1|x64]
  Tests succeeded: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests/Debug/netcoreapp3.1/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests.dll [netcoreapp3.1|x64]
  Running tests: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests/Debug/net5.0/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests.dll [net5.0|x64]
  Tests succeeded: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests/Debug/netcoreapp3.1/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests.dll [netcoreapp3.1|x64]
  Running tests: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests/Debug/net5.0/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests.dll [net5.0|x64]
  Tests succeeded: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.OpenApiGen.UnitTests/Debug/net6.0/Microsoft.Diagnostics.Monitoring.OpenApiGen.UnitTests.dll [net6.0|x64]
  Running tests: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.Tool.UnitTests/Debug/netcoreapp3.1/Microsoft.Diagnostics.Monitoring.Tool.UnitTests.dll [netcoreapp3.1|x64]
  Tests succeeded: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.ConfigurationSchema.UnitTests/Debug/net6.0/Microsoft.Diagnostics.Monitoring.ConfigurationSchema.UnitTests.dll [net6.0|x64]
  Running tests: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.Profiler.UnitTests/Debug/net6.0/Microsoft.Diagnostics.Monitoring.Profiler.UnitTests.dll [net6.0|x64]
  Tests succeeded: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests/Debug/net5.0/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests.dll [net5.0|x64]
  Running tests: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests/Debug/net6.0/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests.dll [net6.0|x64]
  Tests succeeded: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests/Debug/net5.0/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests.dll [net5.0|x64]
  Running tests: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests/Debug/net6.0/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests.dll [net6.0|x64]
  Tests succeeded: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests/Debug/net6.0/Microsoft.Diagnostics.Monitoring.WebApi.UnitTests.dll [net6.0|x64]
  Tests succeeded: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.Profiler.UnitTests/Debug/net6.0/Microsoft.Diagnostics.Monitoring.Profiler.UnitTests.dll [net6.0|x64]
  Tests succeeded: /__w/1/s/artifacts/bin/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests/Debug/net6.0/Microsoft.Diagnostics.Monitoring.Tool.FunctionalTests.dll [net6.0|x64]

[jander-msft]

A probable cause is https://github.com/dotnet/dotnet-monitor/blob/main/src/Tests/Microsoft.Diagnostics.Monitoring.Tool.UnitTests/CollectionRules/Actions/CallbackAction.cs#L89

>	System.Private.CoreLib.dll!System.DateTime.DateTime(long ticks, System.DateTimeKind kind)	Unknown
 	System.Private.CoreLib.dll!System.DateTimeOffset.operator ==(System.DateTimeOffset left, System.DateTimeOffset right)	Unknown
 	Microsoft.Diagnostics.Monitoring.Tool.UnitTests.dll!Microsoft.Diagnostics.Monitoring.Tool.UnitTests.CollectionRules.Actions.DelayedCallbackAction.WaitForCompletionAsync(System.Threading.CancellationToken token)	Unknown
 	dotnet-monitor.dll!Microsoft.Diagnostics.Tools.Monitor.CollectionRules.Actions.ActionListExecutor.WaitForCompletion(Microsoft.Diagnostics.Tools.Monitor.CollectionRules.CollectionRuleContext context, System.Action startCallback, System.Collections.Generic.IDictionary<string, Microsoft.Diagnostics.Tools.Monitor.CollectionRules.Actions.CollectionRuleActionResult> allResults, Microsoft.Diagnostics.Tools.Monitor.CollectionRules.Actions.ICollectionRuleAction action, Microsoft.Diagnostics.Tools.Monitor.CollectionRules.Options.CollectionRuleActionOptions actionOption, System.Threading.CancellationToken cancellationToken)	Unknown
 	dotnet-monitor.dll!Microsoft.Diagnostics.Tools.Monitor.CollectionRules.Actions.ActionListExecutor.WaitForCompletion(Microsoft.Diagnostics.Tools.Monitor.CollectionRules.CollectionRuleContext context, System.Action startCallback, System.Collections.Generic.IDictionary<string, Microsoft.Diagnostics.Tools.Monitor.CollectionRules.Actions.CollectionRuleActionResult> allResults, Microsoft.Diagnostics.Tools.Monitor.CollectionRules.Actions.ActionListExecutor.ActionCompletionEntry entry, System.Threading.CancellationToken cancellationToken)	Unknown

The simulated clock is probably not advancing thus this callback continuously loops. It also doesn't check if the cancellation token was cancelled, so it hangs the test.

[jander-msft]

Hangs no longer occur due to #2251. The test that is causing issues is CollectionRuleDescriptionPipeline_ExecutingAction. Will rename the issue.