Quic ConnectionIdle test failure

[bernardnormier]

I got this failure while running the test suite on macos without code coverage:

Darwin studio.local 25.5.0 Darwin Kernel Version 25.5.0: Mon Apr 27 20:39:09 PDT 2026; root:xnu-12377.121.6~2/RELEASE_ARM64_T6020 arm64

IceRpc.Quic.Tests test net10.0 failed with 1 error(s) (29.4s)
    /Users/bernard/builds/icerpc-csharp/src/IceRpc/Transports/Quic/Internal/QuicMultiplexedConnection.cs(151): error TESTERROR: 
      IceRpc:Tests:Transports:QuicStreamConformanceTests:Stream_write([],[Byte[]]) (10s 95ms): Error Message: IceRpc.IceRpcException : An IceRpc call failed wi
      th error 'ConnectionIdle'.
        IceRpcError: ConnectionIdle
        ----> System.Net.Quic.QuicException : The connection timed out from inactivity.
        QuicError: ConnectionIdle
        ApplicationErrorCode: <null>
        TransportErrorCode: 1
      Stack Trace:
         at IceRpc.Transports.Quic.Internal.QuicMultiplexedClientConnection.ConnectAsync(CancellationToken cancellationToken) in /Users/bernard/builds/icerpc-c
      sharp/src/IceRpc/Transports/Quic/Internal/QuicMultiplexedConnection.cs:line 151
         at IceRpc.Tests.Common.ClientServerMultiplexedConnection.AcceptAndConnectAsync(CancellationToken cancellationToken) in /Users/bernard/builds/icerpc-cs
      harp/tests/IceRpc.Tests.Common/ClientServerMultiplexedConnection.cs:line 51
         at IceRpc.Conformance.Tests.MultiplexedStreamConformanceTests.Stream_write(Byte[] bufferedData, Byte[][] writeData) in /Users/bernard/builds/icerpc-cs
      harp/tests/IceRpc.Conformance.Tests/Transports/MultiplexedStreamConformanceTests.cs:line 706
         at IceRpc.Conformance.Tests.MultiplexedStreamConformanceTests.Stream_write(Byte[] bufferedData, Byte[][] writeData) in /Users/bernard/builds/icerpc-cs
      harp/tests/IceRpc.Conformance.Tests/Transports/MultiplexedStreamConformanceTests.cs:line 742
         at NUnit.Framework.Internal.Commands.TestMethodCommand.Execute(TestExecutionContext context)
         at NUnit.Framework.Internal.ContextUtils.<>c__DisplayClass2_0.<DoIsolated>b__0(Object s)
         at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
      --- End of stack trace from previous location ---
         at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
         at NUnit.Framework.Internal.Execution.SimpleWorkItem.PerformWork()
      --QuicException
         at System.Net.Quic.QuicConnection.HandleEventShutdownInitiatedByTransport(_SHUTDOWN_INITIATED_BY_TRANSPORT_e__Struct& data)
         at System.Net.Quic.QuicConnection.HandleConnectionEvent(QUIC_CONNECTION_EVENT& connectionEvent)
         at System.Net.Quic.QuicConnection.NativeCallback(QUIC_HANDLE* connection, Void* context, QUIC_CONNECTION_EVENT* connectionEvent)
      --- End of stack trace from previous location ---
         at System.Net.Quic.ValueTaskSource.System.Threading.Tasks.Sources.IValueTaskSource.GetResult(Int16 token)
         at System.Net.Quic.QuicConnection.FinishConnectAsync(QuicClientConnectionOptions options, CancellationToken cancellationToken)
         at System.Net.Quic.QuicConnection.<ConnectAsync>g__StartConnectAsync|2_0(QuicClientConnectionOptions options, CancellationToken cancellationToken)
         at System.Net.Quic.QuicConnection.<ConnectAsync>g__StartConnectAsync|2_0(QuicClientConnectionOptions options, CancellationToken cancellationToken)
         at IceRpc.Transports.Quic.Internal.QuicMultiplexedClientConnection.ConnectAsync(CancellationToken cancellationToken) in /Users/bernard/builds/icerpc-c
      sharp/src/IceRpc/Transports/Quic/Internal/QuicMultiplexedConnection.cs:line 145
      1)    at IceRpc.Transports.Quic.Internal.QuicMultiplexedClientConnection.ConnectAsync(CancellationToken cancellationToken) in /Users/bernard/builds/icerp
      c-csharp/src/IceRpc/Transports/Quic/Internal/QuicMultiplexedConnection.cs:line 151
         at IceRpc.Tests.Common.ClientServerMultiplexedConnection.AcceptAndConnectAsync(CancellationToken cancellationToken) in /Users/bernard/builds/icerpc-cs
      harp/tests/IceRpc.Tests.Common/ClientServerMultiplexedConnection.cs:line 51
         at IceRpc.Conformance.Tests.MultiplexedStreamConformanceTests.Stream_write(Byte[] bufferedData, Byte[][] writeData) in /Users/bernard/builds/icerpc-cs
      harp/tests/IceRpc.Conformance.Tests/Transports/MultiplexedStreamConformanceTests.cs:line 706
         at IceRpc.Conformance.Tests.MultiplexedStreamConformanceTests.Stream_write(Byte[] bufferedData, Byte[][] writeData) in /Users/bernard/builds/icerpc-cs
      harp/tests/IceRpc.Conformance.Tests/Transports/MultiplexedStreamConformanceTests.cs:line 742
         at NUnit.Framework.Internal.Commands.TestMethodCommand.Execute(TestExecutionContext context)
         at NUnit.Framework.Internal.ContextUtils.<>c__DisplayClass2_0.<DoIsolated>b__0(Object s)
         at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
      --- End of stack trace from previous location ---
         at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
         at NUnit.Framework.Internal.Execution.SimpleWorkItem.PerformWork()
      --QuicException
         at System.Net.Quic.QuicConnection.HandleEventShutdownInitiatedByTransport(_SHUTDOWN_INITIATED_BY_TRANSPORT_e__Struct& data)
         at System.Net.Quic.QuicConnection.HandleConnectionEvent(QUIC_CONNECTION_EVENT& connectionEvent)
         at System.Net.Quic.QuicConnection.NativeCallback(QUIC_HANDLE* connection, Void* context, QUIC_CONNECTION_EVENT* connectionEvent)
      --- End of stack trace from previous location ---
         at System.Net.Quic.ValueTaskSource.System.Threading.Tasks.Sources.IValueTaskSource.GetResult(Int16 token)
         at System.Net.Quic.QuicConnection.FinishConnectAsync(QuicClientConnectionOptions options, CancellationToken cancellationToken)
         at System.Net.Quic.QuicConnection.<ConnectAsync>g__StartConnectAsync|2_0(QuicClientConnectionOptions options, CancellationToken cancellationToken)
         at System.Net.Quic.QuicConnection.<ConnectAsync>g__StartConnectAsync|2_0(QuicClientConnectionOptions options, CancellationToken cancellationToken)
         at IceRpc.Transports.Quic.Internal.QuicMultiplexedClientConnection.ConnectAsync(CancellationToken cancellationToken) in /Users/bernard/builds/icerpc-c
      sharp/src/IceRpc/Transports/Quic/Internal/QuicMultiplexedConnection.cs:line 145
  IceRpc.Tests net10.0 succeeded (0.7s) → tests/IceRpc.Tests/net10.0/IceRpc.Tests.dll

[bernardnormier]

After running the Quic tests in a loop to reproduce the above, I got two other failures.

Note the very long test duration.

Test summary: total: 123, failed: 0, succeeded: 123, skipped: 0, duration: 18.9s
Build succeeded in 20.2s
Successfully passed run #48. Retrying...
Restore complete (0.3s)
  ZeroC.Slice.Codec net10.0 succeeded (0.0s) → src/ZeroC.Slice.Codec/bin/Debug/net10.0/ZeroC.Slice.Codec.dll
  ZeroC.Tests.Common net10.0 succeeded (0.0s) → tests/ZeroC.Tests.Common/net10.0/ZeroC.Tests.Common.dll
  ZeroC.Slice.Symbols net10.0 succeeded (0.0s) → src/ZeroC.Slice.Symbols/bin/Debug/net10.0/ZeroC.Slice.Symbols.dll
  ZeroC.Slice.Generator net10.0 succeeded (0.0s) → src/ZeroC.Slice.Generator/bin/Debug/net10.0/ZeroC.Slice.Generator.dll
  IceRpc.Slice.Generator net10.0 succeeded (0.1s) → src/IceRpc.Slice.Generator/bin/Debug/net10.0/IceRpc.Slice.Generator.dll
  IceRpc.Slice.Tools net10.0 succeeded (0.0s) → src/IceRpc.Slice.Tools/bin/Debug/net10.0/IceRpc.Slice.Tools.dll
  IceRpc net10.0 succeeded (0.4s) → src/IceRpc/bin/Debug/net10.0/IceRpc.dll
  IceRpc.Logger net10.0 succeeded (0.0s) → src/IceRpc.Logger/bin/Debug/net10.0/IceRpc.Logger.dll
  IceRpc.Transports.Coloc net10.0 succeeded (0.0s) → src/IceRpc.Transports.Coloc/bin/Debug/net10.0/IceRpc.Transports.Coloc.dll
  IceRpc.Extensions.DependencyInjection net10.0 succeeded (0.0s) → src/IceRpc.Extensions.DependencyInjection/bin/Debug/net10.0/IceRpc.Extensions.DependencyInjection.dll
  IceRpc.Tests.Common net10.0 succeeded (0.0s) → tests/IceRpc.Tests.Common/net10.0/IceRpc.Tests.Common.dll
  IceRpc.Conformance.Tests net10.0 succeeded (0.0s) → tests/IceRpc.Conformance.Tests/net10.0/IceRpc.Conformance.Tests.dll
  IceRpc.Quic.Tests net10.0 succeeded (0.0s) → tests/IceRpc.Quic.Tests/net10.0/IceRpc.Quic.Tests.dll
NUnit Adapter 1.0.0.0: Test execution started
Running all tests in /Users/bernard/builds/icerpc-csharp/tests/IceRpc.Quic.Tests/net10.0/IceRpc.Quic.Tests.dll
   NUnit3TestExecutor discovered 123 of 123 NUnit test cases using Current Discovery mode, Non-Explicit run
  IceRpc.Quic.Tests test net10.0 failed with 2 error(s) (30.9s)
    /Users/bernard/builds/icerpc-csharp/src/IceRpc/Transports/Quic/Internal/QuicMultiplexedListener.cs(32): error TESTERROR: 
      IceRpc:Tests:Transports:QuicStreamConformanceTests:Created_stream_has_expected_id(False,True,1,1) (715ms): Error Message: IceRpc.IceRpcException : An IceRpc call failed with error 'ConnectionIdle'.
        IceRpcError: ConnectionIdle
        ----> System.Net.Quic.QuicException : The connection timed out from inactivity.
        QuicError: ConnectionIdle
        ApplicationErrorCode: <null>
        TransportErrorCode: 1
      Stack Trace:
         at IceRpc.Transports.Quic.Internal.QuicMultiplexedListener.AcceptAsync(CancellationToken cancellationToken) in /Users/bernard/builds/icerpc-csharp/src/IceRpc/Transports/Quic/Internal/QuicMultiplexedListener.cs:line 32
         at IceRpc.Tests.Common.ClientServerMultiplexedConnection.AcceptAsync(CancellationToken cancellationToken) in /Users/bernard/builds/icerpc-csharp/tests/IceRpc.Tests.Common/ClientServerMultiplexedConnection.cs:line 32
         at IceRpc.Tests.Common.ClientServerMultiplexedConnection.AcceptAndConnectAsync(CancellationToken cancellationToken) in /Users/bernard/builds/icerpc-csharp/tests/IceRpc.Tests.Common/ClientServerMultiplexedConnection.cs:line 51
         at IceRpc.Conformance.Tests.MultiplexedStreamConformanceTests.Created_stream_has_expected_id(Boolean isClientInitiated, Boolean isBidirectional, Int32 streamCount, UInt64 expectedId) in /Users/bernard/builds/icerpc-csharp/tests/IceRp
      c.Conformance.Tests/Transports/MultiplexedStreamConformanceTests.cs:line 132
         at IceRpc.Conformance.Tests.MultiplexedStreamConformanceTests.Created_stream_has_expected_id(Boolean isClientInitiated, Boolean isBidirectional, Int32 streamCount, UInt64 expectedId) in /Users/bernard/builds/icerpc-csharp/tests/IceRp
      c.Conformance.Tests/Transports/MultiplexedStreamConformanceTests.cs:line 169
         at NUnit.Framework.Internal.TaskAwaitAdapter.GenericAdapter`1.BlockUntilCompleted()
         at NUnit.Framework.Internal.MessagePumpStrategy.NoMessagePumpStrategy.WaitForCompletion(AwaitAdapter awaiter)
         at NUnit.Framework.Internal.AsyncToSyncAdapter.Await[TResult](TestExecutionContext context, Func`1 invoke)
         at NUnit.Framework.Internal.AsyncToSyncAdapter.Await(TestExecutionContext context, Func`1 invoke)
         at NUnit.Framework.Internal.Commands.TestMethodCommand.RunTestMethod(TestExecutionContext context)
         at NUnit.Framework.Internal.Commands.TestMethodCommand.Execute(TestExecutionContext context)
         at NUnit.Framework.Internal.Execution.SimpleWorkItem.<>c__DisplayClass3_0.<PerformWork>b__0()
         at NUnit.Framework.Internal.ContextUtils.<>c__DisplayClass1_0`1.<DoIsolated>b__0(Object _)
         at NUnit.Framework.Internal.ContextUtils.<>c__DisplayClass2_0.<DoIsolated>b__0(Object s)
         at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
      --- End of stack trace from previous location ---
         at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
         at NUnit.Framework.Internal.ContextUtils.DoIsolated(ContextCallback callback, Object state)
         at NUnit.Framework.Internal.ContextUtils.DoIsolated[T](Func`1 func)
         at NUnit.Framework.Internal.Execution.SimpleWorkItem.PerformWork()
      --QuicException
         at System.Net.Quic.QuicConnection.HandleEventShutdownInitiatedByTransport(_SHUTDOWN_INITIATED_BY_TRANSPORT_e__Struct& data)
         at System.Net.Quic.QuicConnection.HandleConnectionEvent(QUIC_CONNECTION_EVENT& connectionEvent)
         at System.Net.Quic.QuicConnection.NativeCallback(QUIC_HANDLE* connection, Void* context, QUIC_CONNECTION_EVENT* connectionEvent)
      --- End of stack trace from previous location ---
         at System.Net.Quic.ValueTaskSource.System.Threading.Tasks.Sources.IValueTaskSource.GetResult(Int16 token)
         at System.Net.Quic.QuicListener.StartConnectionHandshake(QuicConnection connection, SslClientHelloInfo clientHello)
         at System.Net.Quic.QuicListener.AcceptConnectionAsync(CancellationToken cancellationToken)
         at IceRpc.Transports.Quic.Internal.QuicMultiplexedListener.AcceptAsync(CancellationToken cancellationToken) in /Users/bernard/builds/icerpc-csharp/src/IceRpc/Transports/Quic/Internal/QuicMultiplexedListener.cs:line 27
      1)    at IceRpc.Transports.Quic.Internal.QuicMultiplexedListener.AcceptAsync(CancellationToken cancellationToken) in /Users/bernard/builds/icerpc-csharp/src/IceRpc/Transports/Quic/Internal/QuicMultiplexedListener.cs:line 32
         at IceRpc.Tests.Common.ClientServerMultiplexedConnection.AcceptAsync(CancellationToken cancellationToken) in /Users/bernard/builds/icerpc-csharp/tests/IceRpc.Tests.Common/ClientServerMultiplexedConnection.cs:line 32
         at IceRpc.Tests.Common.ClientServerMultiplexedConnection.AcceptAndConnectAsync(CancellationToken cancellationToken) in /Users/bernard/builds/icerpc-csharp/tests/IceRpc.Tests.Common/ClientServerMultiplexedConnection.cs:line 51
         at IceRpc.Conformance.Tests.MultiplexedStreamConformanceTests.Created_stream_has_expected_id(Boolean isClientInitiated, Boolean isBidirectional, Int32 streamCount, UInt64 expectedId) in /Users/bernard/builds/icerpc-csharp/tests/IceRp
      c.Conformance.Tests/Transports/MultiplexedStreamConformanceTests.cs:line 132
         at IceRpc.Conformance.Tests.MultiplexedStreamConformanceTests.Created_stream_has_expected_id(Boolean isClientInitiated, Boolean isBidirectional, Int32 streamCount, UInt64 expectedId) in /Users/bernard/builds/icerpc-csharp/tests/IceRp
      c.Conformance.Tests/Transports/MultiplexedStreamConformanceTests.cs:line 169
         at NUnit.Framework.Internal.TaskAwaitAdapter.GenericAdapter`1.BlockUntilCompleted()
         at NUnit.Framework.Internal.MessagePumpStrategy.NoMessagePumpStrategy.WaitForCompletion(AwaitAdapter awaiter)
         at NUnit.Framework.Internal.AsyncToSyncAdapter.Await[TResult](TestExecutionContext context, Func`1 invoke)
         at NUnit.Framework.Internal.AsyncToSyncAdapter.Await(TestExecutionContext context, Func`1 invoke)
         at NUnit.Framework.Internal.Commands.TestMethodCommand.RunTestMethod(TestExecutionContext context)
         at NUnit.Framework.Internal.Commands.TestMethodCommand.Execute(TestExecutionContext context)
         at NUnit.Framework.Internal.Execution.SimpleWorkItem.<>c__DisplayClass3_0.<PerformWork>b__0()
         at NUnit.Framework.Internal.ContextUtils.<>c__DisplayClass1_0`1.<DoIsolated>b__0(Object _)
         at NUnit.Framework.Internal.ContextUtils.<>c__DisplayClass2_0.<DoIsolated>b__0(Object s)
         at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
      --- End of stack trace from previous location ---
         at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
         at NUnit.Framework.Internal.ContextUtils.DoIsolated(ContextCallback callback, Object state)
         at NUnit.Framework.Internal.ContextUtils.DoIsolated[T](Func`1 func)
         at NUnit.Framework.Internal.Execution.SimpleWorkItem.PerformWork()
      --QuicException
         at System.Net.Quic.QuicConnection.HandleEventShutdownInitiatedByTransport(_SHUTDOWN_INITIATED_BY_TRANSPORT_e__Struct& data)
         at System.Net.Quic.QuicConnection.HandleConnectionEvent(QUIC_CONNECTION_EVENT& connectionEvent)
         at System.Net.Quic.QuicConnection.NativeCallback(QUIC_HANDLE* connection, Void* context, QUIC_CONNECTION_EVENT* connectionEvent)
      --- End of stack trace from previous location ---
         at System.Net.Quic.ValueTaskSource.System.Threading.Tasks.Sources.IValueTaskSource.GetResult(Int16 token)
         at System.Net.Quic.QuicListener.StartConnectionHandshake(QuicConnection connection, SslClientHelloInfo clientHello)
         at System.Net.Quic.QuicListener.AcceptConnectionAsync(CancellationToken cancellationToken)
         at IceRpc.Transports.Quic.Internal.QuicMultiplexedListener.AcceptAsync(CancellationToken cancellationToken) in /Users/bernard/builds/icerpc-csharp/src/IceRpc/Transports/Quic/Internal/QuicMultiplexedListener.cs:line 27
    /Users/bernard/builds/icerpc-csharp/src/IceRpc/Transports/Quic/Internal/QuicMultiplexedConnection.cs(151): error TESTERROR: 
      IceRpc:Tests:Transports:QuicStreamConformanceTests:Stream_local_writes_are_closed_when_local_output_completed(False,True) (10s 74ms): Error Message: IceRpc.IceRpcException : An IceRpc call failed with error 'ConnectionAborted'.
        IceRpcError: ConnectionAborted
        ----> System.Net.Quic.QuicException : Connection handshake was canceled due to the configured timeout of 00:00:10 seconds elapsing.
        QuicError: ConnectionTimeout
        ApplicationErrorCode: <null>
        TransportErrorCode: <null>
      Stack Trace:
         at IceRpc.Transports.Quic.Internal.QuicMultiplexedClientConnection.ConnectAsync(CancellationToken cancellationToken) in /Users/bernard/builds/icerpc-csharp/src/IceRpc/Transports/Quic/Internal/QuicMultiplexedConnection.cs:line 151
         at IceRpc.Tests.Common.ClientServerMultiplexedConnection.AcceptAndConnectAsync(CancellationToken cancellationToken) in /Users/bernard/builds/icerpc-csharp/tests/IceRpc.Tests.Common/ClientServerMultiplexedConnection.cs:line 51
         at IceRpc.Conformance.Tests.MultiplexedStreamConformanceTests.Stream_local_writes_are_closed_when_local_output_completed(Boolean isBidirectional, Boolean abort) in /Users/bernard/builds/icerpc-csharp/tests/IceRpc.Conformance.Tests/Tr
      ansports/MultiplexedStreamConformanceTests.cs:line 410
         at IceRpc.Conformance.Tests.MultiplexedStreamConformanceTests.Stream_local_writes_are_closed_when_local_output_completed(Boolean isBidirectional, Boolean abort) in /Users/bernard/builds/icerpc-csharp/tests/IceRpc.Conformance.Tests/Tr
      ansports/MultiplexedStreamConformanceTests.cs:line 417
         at NUnit.Framework.Internal.Commands.TestMethodCommand.Execute(TestExecutionContext context)
         at NUnit.Framework.Internal.ContextUtils.<>c__DisplayClass2_0.<DoIsolated>b__0(Object s)
         at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
      --- End of stack trace from previous location ---
         at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
         at NUnit.Framework.Internal.Execution.SimpleWorkItem.PerformWork()
      --QuicException
         at System.Net.Quic.QuicConnection.<ConnectAsync>g__StartConnectAsync|2_0(QuicClientConnectionOptions options, CancellationToken cancellationToken)
         at IceRpc.Transports.Quic.Internal.QuicMultiplexedClientConnection.ConnectAsync(CancellationToken cancellationToken) in /Users/bernard/builds/icerpc-csharp/src/IceRpc/Transports/Quic/Internal/QuicMultiplexedConnection.cs:line 145
      1)    at IceRpc.Transports.Quic.Internal.QuicMultiplexedClientConnection.ConnectAsync(CancellationToken cancellationToken) in /Users/bernard/builds/icerpc-csharp/src/IceRpc/Transports/Quic/Internal/QuicMultiplexedConnection.cs:line 151
         at IceRpc.Tests.Common.ClientServerMultiplexedConnection.AcceptAndConnectAsync(CancellationToken cancellationToken) in /Users/bernard/builds/icerpc-csharp/tests/IceRpc.Tests.Common/ClientServerMultiplexedConnection.cs:line 51
         at IceRpc.Conformance.Tests.MultiplexedStreamConformanceTests.Stream_local_writes_are_closed_when_local_output_completed(Boolean isBidirectional, Boolean abort) in /Users/bernard/builds/icerpc-csharp/tests/IceRpc.Conformance.Tests/Tr
      ansports/MultiplexedStreamConformanceTests.cs:line 410
         at IceRpc.Conformance.Tests.MultiplexedStreamConformanceTests.Stream_local_writes_are_closed_when_local_output_completed(Boolean isBidirectional, Boolean abort) in /Users/bernard/builds/icerpc-csharp/tests/IceRpc.Conformance.Tests/Tr
      ansports/MultiplexedStreamConformanceTests.cs:line 417
         at NUnit.Framework.Internal.Commands.TestMethodCommand.Execute(TestExecutionContext context)
         at NUnit.Framework.Internal.ContextUtils.<>c__DisplayClass2_0.<DoIsolated>b__0(Object s)
         at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
      --- End of stack trace from previous location ---
         at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
         at NUnit.Framework.Internal.Execution.SimpleWorkItem.PerformWork()
      --QuicException
         at System.Net.Quic.QuicConnection.<ConnectAsync>g__StartConnectAsync|2_0(QuicClientConnectionOptions options, CancellationToken cancellationToken)
         at IceRpc.Transports.Quic.Internal.QuicMultiplexedClientConnection.ConnectAsync(CancellationToken cancellationToken) in /Users/bernard/builds/icerpc-csharp/src/IceRpc/Transports/Quic/Internal/QuicMultiplexedConnection.cs:line 145

Test summary: total: 123, failed: 2, succeeded: 121, skipped: 0, duration: 944.5s
Build failed with 2 error(s) in 945.8s

[pepone]

I cannot reproduce even with stressing the CPU, 945s is way to slow here.

[bernardnormier]

I can reproduce it when running it a loop - only on macos, linux is still running after 4000+ iterations:

while dotnet test tests/IceRpc.Quic.Tests/IceRpc.Quic.Tests.csproj --no-build --verbosity normal --blame  --blame-crash --blame-hang-timeout 60s --diag:"TestResults/vstest.log" --logger "trx"  --results-directory TestResults; do echo "Successfully passed run #$count. Retrying..."; ((count++)); done

The issue on macos is that IceRpc.Tests.Common.ClientServerMultiplexedConnection.AcceptAndConnectAsync occasionally times out after the default 10 second timeout. This call is at the beginning of many tests and just creates a connection to an ephemeral port (:0). So the failure is not specific to any particular test. There is also not a lot of test code or IceRpc.Transports.Quic code involved, which suggests a bug in .NET QUIC or libmsquic.