Exception thrown in SocketConnectivitySubchannelTransport.Disconnect()

[olivierboucher]

What version of gRPC and what language are you using?

2.42.0-pre1

What operating system (Linux, Windows,...) and version?

Docker image: mcr.microsoft.com/dotnet/aspnet:5.0

What runtime / compiler are you using (e.g. .NET Core SDK version dotnet --info)

Host (useful for support):
  Version: 5.0.13
  Commit:  b3afe99225

.NET SDKs installed:
  No SDKs were found.

.NET runtimes installed:
  Microsoft.AspNetCore.App 5.0.13 [/usr/share/dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 5.0.13 [/usr/share/dotnet/shared/Microsoft.NETCore.App]

What did you do?

Nothing. Seems to happens sporadically as the server runs

What did you expect to see?

What did you see instead?

Seems like this is an internal error unrelated to any application specific code.

Unhandled exception. System.ObjectDisposedException: Cannot access a disposed object.
   at System.Threading.TimerQueueTimer.Change(UInt32 dueTime, UInt32 period)
   at System.Threading.Timer.Change(TimeSpan dueTime, TimeSpan period)
   at Grpc.Net.Client.Balancer.Internal.SocketConnectivitySubchannelTransport.Disconnect()
   at Grpc.Net.Client.Balancer.Internal.SocketConnectivitySubchannelTransport.OnStreamDisposed(Stream streamWrapper)
   at Grpc.Net.Client.Balancer.Internal.StreamWrapper.Dispose(Boolean disposing)
   at System.IO.Stream.Close()
   at System.Net.Http.Http2Connection.CheckForShutdown()
   at System.Net.Http.Http2Connection.Dispose()
   at System.Net.Http.HttpConnectionPool.CleanCacheAndDisposeIfUnused()
   at System.Net.Http.HttpConnectionPoolManager.RemoveStalePools()
   at System.Net.Http.HttpConnectionPoolManager.<>c.<.ctor>b__12_0(Object s)
   at System.Threading.TimerQueueTimer.CallCallback(Boolean isThreadPool)
   at System.Threading.TimerQueueTimer.Fire(Boolean isThreadPool)
   at System.Threading.TimerQueue.FireNextTimers()

[JamesNK]

Thanks. This issue was fixed recently: #1554

You could try using 2.41.0-pre1, or using a nightly build from the NuGet feed.

[olivierboucher]

Thanks James,

Recently updated my code to use the refactored Resolver API so my only option is the nightly build I guess... Do you know when 2.42 is supposed to land?

[JamesNK]

Probably in the next week or two.