Stuck on an issue?

Lightrun Answers was designed to reduce the constant googling that comes with debugging 3rd party libraries. It collects links to all the places you might be looking at while hunting down a tough bug.

And, if you’re still stuck at the end, we’re happy to hop on a call to see how we can help out.

Error starting gRPC call. A task was canceled.

See original GitHub issue

When I am doing grpc call, after some time this exception throws “Error starting gRPC call. A task was canceled.”

.net 6

Exception

{ “@timestamp”: “2022-03-30T12:37:38.5892808+04:00”, “level”: “Error”, “messageTemplate”: “Error starting gRPC call.”, “message”: “Error starting gRPC call.”, “exceptions”: [ { “Depth”: 0, “ClassName”: “System.Threading.Tasks.TaskCanceledException”, “Message”: “A task was canceled.”, “Source”: “System.Private.CoreLib”, “StackTraceString”: " at Grpc.Net.Client.Balancer.Internal.ConnectionManager.GetNextPickerAsync(CancellationToken cancellationToken)\n at Grpc.Net.Client.Balancer.Internal.ConnectionManager.PickAsync(PickContext context, Boolean waitForReady, CancellationToken cancellationToken)\n at Grpc.Net.Client.Balancer.Internal.BalancerHttpHandler.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)\n at Grpc.Net.Client.Internal.GrpcCall2.RunCall(HttpRequestMessage request, Nullable1 timeout)", “RemoteStackTraceString”: null, “RemoteStackIndex”: 0, “HResult”: -2146233029, “HelpURL”: null } ], “fields”: { “EventId”: { “Id”: 6, “Name”: “ErrorStartingCall” }, “SourceContext”: “Grpc.Net.Client.Internal.GrpcCall”, “GrpcMethodType”: “Unary”, “GrpcUri”: “/XXXXX/Get”, } }

Issue Analytics

State:
Created a year ago
Comments:23 (6 by maintainers)

Top GitHub Comments

2reactions

vladislav-prishchepacommented, Apr 7, 2022

I’ve repeated tests with 2.45.0-pre1 - everything works well. @JamesNK Thanks for fix

1reaction

BenVcommented, Apr 13, 2022

This is from a production service so I am unable to turn on debug logging (I’ll try to reproduce in staging/locally, but it seems to happen only under load so far). Here is the stack trace, if it is helpful:

Type: Grpc.Core.RpcException
	Source: Grpc.Net.Client.Balancer.Internal.ConnectionManager+<PickAsync>d__45, Grpc.Net.Client, Version=2.0.0.0, Culture=neutral, PublicKeyToken=d754f35622e28bad
	Message: Status(StatusCode="Unavailable", Detail="Error connecting to subchannel.", DebugException="System.InvalidOperationException: An attempt was made to transition a task to a final state when it had already completed.
   at Grpc.Net.Client.Balancer.Internal.ConnectionManager.UpdateState(BalancerState state)
   at Grpc.Net.Client.Balancer.Internal.ChildHandlerLoadBalancer.ChildHandlerController.UpdateState(BalancerState state)
   at Grpc.Net.Client.Balancer.PickFirstBalancer.UpdateSubchannelState(Subchannel subchannel, SubchannelState state)
   at Grpc.Net.Client.Balancer.Subchannel.RaiseStateChanged(ConnectivityState state, Status status)
   at Grpc.Net.Client.Balancer.Internal.ConnectionManager.OnSubchannelStateChange(Subchannel subchannel, ConnectivityState state, Status status)
   at Grpc.Net.Client.Balancer.Subchannel.UpdateConnectivityState(ConnectivityState state, Status status)
   at Grpc.Net.Client.Balancer.Internal.SocketConnectivitySubchannelTransport.TryConnectAsync(CancellationToken cancellationToken)")
	Trace:    at Grpc.Net.Client.Balancer.Internal.ConnectionManager.PickAsync(PickContext context, Boolean waitForReady, CancellationToken cancellationToken)
   at Grpc.Net.Client.Balancer.Internal.BalancerHttpHandler.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
   at Grpc.Net.Client.Internal.GrpcCall`2.RunCall(HttpRequestMessage request, Nullable`1 timeout)