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Possible deadlock

See original GitHub issue

Description

While running tests locally in debug mode, I’ve hit what seems to a deadlock due executing too many tasks simultaneously.

I’ve captured a dump of the testhost.exe process. I can’t attach the dump here, but if anyone is interested in analyzing the dump, please let me know

Blocked	FluentAssertions.Specs.ExecutionTimeAssertionsSpecs.<>c.<When_action_runs_indefinitely_it_should_be_stopped_and_throw_if_there_is_be_close_to_condition>b__27_0	FluentAssertions.Specialized.ExecutionTime.<>c__DisplayClass2_0.<.ctor>b__0
Blocked	Xunit.Runner.VisualStudio.VsTestRunner.RunTestsInAssembly	Microsoft.VisualStudio.TestPlatform.Utilities.JobQueue.<.ctor>b__12_0
Blocked	FluentAssertions.Specs.ExecutionTimeAssertionsSpecs.<>c.<When_action_runs_indefinitely_it_should_be_stopped_and_throw_if_there_is_less_or_equal_condition>b__4_0	FluentAssertions.Specialized.ExecutionTime.<>c__DisplayClass2_0.<.ctor>b__0
Blocked	FluentAssertions.Specs.ExecutionTimeAssertionsSpecs.<>c.<When_action_runs_indefinitely_it_should_be_stopped_and_not_throw_if_there_is_greater_than_condition>b__21_0	FluentAssertions.Specialized.ExecutionTime.<>c__DisplayClass2_0.<.ctor>b__0
Blocked	Xunit.Sdk.MaxConcurrencySyncContext.WorkerThreadProc	Xunit.Sdk.XunitWorkerThread.<>c.<QueueUserWorkItem>b__5_0
Blocked	FluentAssertions.Specs.ExecutionTimeAssertionsSpecs.<>c.<When_action_runs_indefinitely_it_should_be_stopped_and_not_throw_if_there_is_greater_or_equal_condition>b__16_0	FluentAssertions.Specialized.ExecutionTime.<>c__DisplayClass2_0.<.ctor>b__0
Blocked	Xunit.Sdk.MaxConcurrencySyncContext.WorkerThreadProc	Xunit.Sdk.XunitWorkerThread.<>c.<QueueUserWorkItem>b__5_0
Blocked	FluentAssertions.Specs.ExecutionTimeAssertionsSpecs.<>c.<When_action_runs_indefinitely_it_should_be_stopped_and_throw_if_there_is_less_than_condition>b__11_0	FluentAssertions.Specialized.ExecutionTime.<>c__DisplayClass2_0.<.ctor>b__0
Blocked	Xunit.Sdk.MaxConcurrencySyncContext.WorkerThreadProc	Xunit.Sdk.XunitWorkerThread.<>c.<QueueUserWorkItem>b__5_0
Blocked	Microsoft.VisualStudio.TestPlatform.CommunicationUtilities.TestRequestHandler.ProcessRequests	Microsoft.VisualStudio.TestPlatform.TestHost.DefaultEngineInvoker.<>c__DisplayClass19_0.<StartProcessingAsync>b__0
Awaiting	Xunit.Sdk.TestCollectionRunner<TTestCase>.RunAsync()	Xunit.Sdk.TestCollectionRunner<TTestCase>.RunAsync()
Awaiting	Xunit.Sdk.TestMethodRunner<TTestCase>.RunTestCasesAsync()	Xunit.Sdk.TestMethodRunner<TTestCase>.RunTestCasesAsync()
Awaiting	Xunit.Sdk.TestMethodRunner<TTestCase>.RunAsync()	Xunit.Sdk.TestMethodRunner<TTestCase>.RunAsync()
Awaiting	Xunit.Sdk.UISynchronizationContext.PumpMessages.AnonymousMethod__15_0(_)	Xunit.Sdk.UISynchronizationContext.PumpMessages.AnonymousMethod__15_0(_)
Awaiting	System.Threading.Tasks.UnwrapPromise<TResult>.Invoke(completingTask)	System.Threading.Tasks.UnwrapPromise<TResult>.Invoke(completingTask)
Awaiting	Xunit.Sdk.TestCollectionRunner<TTestCase>.RunAsync()	Xunit.Sdk.TestCollectionRunner<TTestCase>.RunAsync()
Awaiting	System.Threading.Tasks.UnwrapPromise<TResult>.Invoke(completingTask)	System.Threading.Tasks.UnwrapPromise<TResult>.Invoke(completingTask)
Awaiting	Xunit.Sdk.TestClassRunner<TTestCase>.RunAsync()	Xunit.Sdk.TestClassRunner<TTestCase>.RunAsync()
Awaiting	Xunit.Sdk.TestClassRunner<TTestCase>.RunAsync()	Xunit.Sdk.TestClassRunner<TTestCase>.RunAsync()
Awaiting	Xunit.Sdk.TestCollectionRunner<TTestCase>.RunTestClassesAsync()	Xunit.Sdk.TestCollectionRunner<TTestCase>.RunTestClassesAsync()
Awaiting	System.Threading.Tasks.UnwrapPromise<TResult>.Invoke(completingTask)	System.Threading.Tasks.UnwrapPromise<TResult>.Invoke(completingTask)
Awaiting	Xunit.Sdk.TestCollectionRunner<TTestCase>.RunAsync()	Xunit.Sdk.TestCollectionRunner<TTestCase>.RunAsync()
Awaiting	Xunit.Sdk.TestCollectionRunner<TTestCase>.RunTestClassesAsync()	Xunit.Sdk.TestCollectionRunner<TTestCase>.RunTestClassesAsync()
Awaiting	Xunit.Sdk.XunitTestFrameworkExecutor.RunTestCases(testCases, executionMessageSink, executionOptions)	Xunit.Sdk.XunitTestFrameworkExecutor.RunTestCases(testCases, executionMessageSink, executionOptions)
Awaiting	System.Threading.Tasks.UnwrapPromise<TResult>.Invoke(completingTask)	System.Threading.Tasks.UnwrapPromise<TResult>.Invoke(completingTask)
Awaiting	System.Threading.Tasks.UnwrapPromise<TResult>.Invoke(completingTask)	System.Threading.Tasks.UnwrapPromise<TResult>.Invoke(completingTask)
Awaiting	Xunit.Sdk.TestAssemblyRunner<TTestCase>.RunAsync()	Xunit.Sdk.TestAssemblyRunner<TTestCase>.RunAsync()
Awaiting	Xunit.Sdk.XunitTestAssemblyRunner.RunTestCollectionsAsync(messageBus, cancellationTokenSource)	Xunit.Sdk.XunitTestAssemblyRunner.RunTestCollectionsAsync(messageBus, cancellationTokenSource)
Awaiting	System.Threading.Tasks.UnwrapPromise<TResult>.Invoke(completingTask)	System.Threading.Tasks.UnwrapPromise<TResult>.Invoke(completingTask)
Awaiting	System.Threading.Tasks.UnwrapPromise<TResult>.Invoke(completingTask)	System.Threading.Tasks.UnwrapPromise<TResult>.Invoke(completingTask)
Awaiting	System.Threading.Tasks.UnwrapPromise<TResult>.Invoke(completingTask)	System.Threading.Tasks.UnwrapPromise<TResult>.Invoke(completingTask)
Awaiting	System.Threading.Tasks.UnwrapPromise<TResult>.Invoke(completingTask)	System.Threading.Tasks.UnwrapPromise<TResult>.Invoke(completingTask)
Awaiting	System.Threading.Tasks.UnwrapPromise<TResult>.Invoke(completingTask)	System.Threading.Tasks.UnwrapPromise<TResult>.Invoke(completingTask)
Awaiting	Xunit.Sdk.TestClassRunner<TTestCase>.RunAsync()	Xunit.Sdk.TestClassRunner<TTestCase>.RunAsync()
Awaiting	System.Threading.Tasks.UnwrapPromise<TResult>.Invoke(completingTask)	System.Threading.Tasks.UnwrapPromise<TResult>.Invoke(completingTask)
Awaiting	Xunit.Sdk.TestCollectionRunner<TTestCase>.RunTestClassesAsync()	Xunit.Sdk.TestCollectionRunner<TTestCase>.RunTestClassesAsync()
Awaiting	Xunit.Sdk.TestClassRunner<TTestCase>.RunTestMethodsAsync()	Xunit.Sdk.TestClassRunner<TTestCase>.RunTestMethodsAsync()
Active	Xunit.Sdk.XunitTestAssemblyRunner.RunTestCollectionAsync	Xunit.Sdk.XunitTestAssemblyRunner.<>c__DisplayClass14_2.<RunTestCollectionsAsync>b__2
Active	Xunit.Sdk.XunitTestAssemblyRunner.RunTestCollectionAsync	Xunit.Sdk.XunitTestAssemblyRunner.<>c__DisplayClass14_2.<RunTestCollectionsAsync>b__2
Active	Xunit.Sdk.XunitTestAssemblyRunner.RunTestCollectionAsync	Xunit.Sdk.XunitTestAssemblyRunner.<>c__DisplayClass14_2.<RunTestCollectionsAsync>b__2
Active	Xunit.Sdk.XunitTestClassRunner.RunTestMethodAsync(testMethod, method, testCases, constructorArguments)	System.Runtime.CompilerServices.AsyncTaskMethodBuilder+AsyncStateMachineBox<Xunit.Sdk.RunSummary, Xunit.Sdk.TestClassRunner+<RunTestMethodsAsync>d__38<Xunit.Sdk.IXunitTestCase>>
Active	Xunit.Sdk.XunitTestAssemblyRunner.RunTestCollectionAsync	Xunit.Sdk.XunitTestAssemblyRunner.<>c__DisplayClass14_2.<RunTestCollectionsAsync>b__2
Active	Xunit.Sdk.XunitTestAssemblyRunner.RunTestCollectionAsync	Xunit.Sdk.XunitTestAssemblyRunner.<>c__DisplayClass14_2.<RunTestCollectionsAsync>b__2
Active	Xunit.Sdk.XunitTestClassRunner.RunTestMethodAsync(testMethod, method, testCases, constructorArguments)	System.Runtime.CompilerServices.AsyncTaskMethodBuilder+AsyncStateMachineBox<Xunit.Sdk.RunSummary, Xunit.Sdk.TestClassRunner+<RunTestMethodsAsync>d__38<Xunit.Sdk.IXunitTestCase>>
Active	Xunit.Sdk.UITestCase.RunAsync(diagnosticMessageSink, messageBus, constructorArguments, aggregator, cancellationTokenSource)	System.Runtime.CompilerServices.AsyncTaskMethodBuilder+AsyncStateMachineBox<Xunit.Sdk.RunSummary, Xunit.Sdk.UITestCase+<RunAsync>d__8>
Active	Xunit.Sdk.MaxConcurrencySyncContext.RunOnSyncContext	Xunit.Sdk.XunitWorkerThread.<>c.<QueueUserWorkItem>b__5_0
Active	Xunit.Sdk.XunitTestAssemblyRunner.RunTestCollectionAsync	Xunit.Sdk.XunitTestAssemblyRunner.<>c__DisplayClass14_2.<RunTestCollectionsAsync>b__2
Active	Xunit.Sdk.MaxConcurrencySyncContext.RunOnSyncContext	Xunit.Sdk.XunitWorkerThread.<>c.<QueueUserWorkItem>b__5_0
Active	Xunit.Sdk.MaxConcurrencySyncContext.RunOnSyncContext	Xunit.Sdk.XunitWorkerThread.<>c.<QueueUserWorkItem>b__5_0
Active	Xunit.Sdk.MaxConcurrencySyncContext.RunOnSyncContext	Xunit.Sdk.XunitWorkerThread.<>c.<QueueUserWorkItem>b__5_0
Active	Xunit.Sdk.TestMethodRunner.<RunTestCasesAsync>d__32.MoveNext	Xunit.Sdk.XunitWorkerThread.<>c.<QueueUserWorkItem>b__5_0
Active	Xunit.Sdk.XunitTestAssemblyRunner.RunTestCollectionAsync	Xunit.Sdk.XunitTestAssemblyRunner.<>c__DisplayClass14_2.<RunTestCollectionsAsync>b__2
Active	Xunit.Sdk.MaxConcurrencySyncContext.RunOnSyncContext	Xunit.Sdk.XunitWorkerThread.<>c.<QueueUserWorkItem>b__5_0
Active	Xunit.Sdk.MaxConcurrencySyncContext.RunOnSyncContext	Xunit.Sdk.XunitWorkerThread.<>c.<QueueUserWorkItem>b__5_0
Active	Newtonsoft.Json.JsonWriter.WriteValue	Xunit.Sdk.XunitWorkerThread.<>c.<QueueUserWorkItem>b__5_0
Active	Xunit.Sdk.TestInvoker.<InvokeTestMethodAsync>d__48.MoveNext	Xunit.Sdk.XunitWorkerThread.<>c.<QueueUserWorkItem>b__5_0
Active	System.Net.Sockets.SocketPal.Poll	Microsoft.VisualStudio.TestPlatform.CommunicationUtilities.SocketClient.<OnServerConnected>b__16_0
Active	Xunit.Sdk.MaxConcurrencySyncContext.RunOnSyncContext	Xunit.Sdk.XunitWorkerThread.<>c.<QueueUserWorkItem>b__5_0
Scheduled	[Scheduled and waiting to run]	System.Threading.Tasks.Task<System.Decimal>
Scheduled	[Scheduled and waiting to run]	System.Threading.Tasks.Task<System.Boolean>
Scheduled	[Scheduled and waiting to run]	System.Threading.Tasks.Task<System.Boolean>
Scheduled	[Scheduled and waiting to run]	System.Threading.Tasks.Task<System.Boolean>
Scheduled	[Scheduled and waiting to run]	System.Threading.Tasks.Task<System.Boolean>
Scheduled	[Scheduled and waiting to run]	System.Threading.Tasks.Task<System.Threading.SynchronizationContext>
Scheduled	[Scheduled and waiting to run]	System.Threading.Tasks.Task<System.Decimal>
Scheduled	[Scheduled and waiting to run]	System.Threading.Tasks.Task<System.Object>
Scheduled	[Scheduled and waiting to run]	System.Threading.Tasks.Task<System.Object>

I’m suspecting this might be related https://github.com/fluentassertions/fluentassertions/pull/1324 but the problem might rather be that Execution wraps the Subject inside a Task.Run for being able to “cancel” the infinite actions.

Issue Analytics

  • State:closed
  • Created 3 years ago
  • Comments:5 (5 by maintainers)

github_iconTop GitHub Comments

3reactions
lg2decommented, Sep 18, 2020

I was fighting for 1324, so I feel responsible (a bit). I would like to analyze in detail.

0reactions
jnyrupcommented, Jun 1, 2021

Thanks for the explanation 👍 With fingers crossed, I’ll close this issue.

Read more comments on GitHub >

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