Await bug? #1195

pbarrios · 2022-07-26T15:56:43Z

pbarrios
Jul 26, 2022

I'm facing this error:

Message: The ReadAsync method cannot be called when another read operation is pending.
System.Net.Security.SslStream+<ReadAsyncInternal>d__181`1.MoveNext():1182
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw():17
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task):38
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task):46
 
MySqlConnector.Protocol.Serialization.StreamByteHandler+<<ReadBytesAsync>g__DoReadBytesAsync|6_2>d.MoveNext() in C:\projects\mysqlconnector\src\MySqlConnector\Protocol\Serialization\StreamByteHandler.cs:89
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw():17
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task):38
 
MySqlConnector.Protocol.Serialization.BufferedByteReader+<ReadBytesAsync>d__2.MoveNext() in C:\projects\mysqlconnector\src\MySqlConnector\Protocol\Serialization\BufferedByteReader.cs:36
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw():17
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task):38
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task):46
 
MySqlConnector.Protocol.Serialization.ProtocolUtility.ReadPacketAsync(BufferedByteReader bufferedByteReader, IByteHandler byteHandler, Func`1 getNextSequenceNumber, ProtocolErrorBehavior protocolErrorBehavior, IOBehavior ioBehavior) in C:\projects\mysqlconnector\src\MySqlConnector\Protocol\Serialization\ProtocolUtility.cs:406
MySqlConnector.Protocol.Serialization.ProtocolUtility.DoReadPayloadAsync(BufferedByteReader bufferedByteReader, IByteHandler byteHandler, Func`1 getNextSequenceNumber, ArraySegmentHolder`1 previousPayloads, ProtocolErrorBehavior protocolErrorBehavior, IOBehavior ioBehavior) in C:\projects\mysqlconnector\src\MySqlConnector\Protocol\Serialization\ProtocolUtility.cs:459
MySqlConnector.Protocol.Serialization.StandardPayloadHandler.ReadPayloadAsync(ArraySegmentHolder`1 cache, ProtocolErrorBehavior protocolErrorBehavior, IOBehavior ioBehavior) in C:\projects\mysqlconnector\src\MySqlConnector\Protocol\Serialization\StandardPayloadHandler.cs:37
MySqlConnector.Core.ServerSession.ReceiveReplyAsync(IOBehavior ioBehavior, CancellationToken cancellationToken) in C:\projects\mysqlconnector\src\MySqlConnector\Core\ServerSession.cs:672
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw():17
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task):38
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task):46
 
MySqlConnector.Core.ServerSession.TryAsyncContinuation(Task`1 task) in C:\projects\mysqlconnector\src\MySqlConnector\Core\ServerSession.cs:1247
System.Threading.Tasks.ContinuationResultTaskFromResultTask`2.InnerInvoke():85
System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state):156
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw():17
System.Threading.Tasks.Task.ExecuteWithThreadLocal(Task& currentTaskSlot, Thread threadPoolThread):327
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw():17
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task):38
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task):46
 
MySqlConnector.Core.ServerSession+<TryResetConnectionAsync>d__65.MoveNext() in C:\projects\mysqlconnector\src\MySqlConnector\Core\ServerSession.cs:448
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw():17
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task):38
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task):46
 
MySqlConnector.Core.ConnectionPool+<GetSessionAsync>d__10.MoveNext() in C:\projects\mysqlconnector\src\MySqlConnector\Core\ConnectionPool.cs:143
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw():17
MySqlConnector.Core.ConnectionPool+<GetSessionAsync>d__10.MoveNext() in C:\projects\mysqlconnector\src\MySqlConnector\Core\ConnectionPool.cs:143
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw():17
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task):38
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task):46
 
MySql.Data.MySqlClient.MySqlConnection+<CreateSessionAsync>d__96.MoveNext() in C:\projects\mysqlconnector\src\MySqlConnector\MySql.Data.MySqlClient\MySqlConnection.cs:530
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw():17
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task):38
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task):46
 
MySql.Data.MySqlClient.MySqlConnection+<OpenAsync>d__27.MoveNext() in C:\projects\mysqlconnector\src\MySqlConnector\MySql.Data.MySqlClient\MySqlConnection.cs:252
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw():17
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task):38
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task):46
 
Microsoft.EntityFrameworkCore.Storage.RelationalConnection+<OpenDbConnectionAsync>d__48.MoveNext():312
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw():17
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task):38
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task):46
 
Microsoft.EntityFrameworkCore.Storage.RelationalConnection+<OpenAsync>d__45.MoveNext():239
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw():17
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task):38
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task):46
 
Microsoft.EntityFrameworkCore.Query.Internal.AsyncQueryingEnumerable`1+AsyncEnumerator+<BufferlessMoveNext>d__12.MoveNext():863
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw():17
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task):38
 
Microsoft.EntityFrameworkCore.Storage.ExecutionStrategy+<ExecuteImplementationAsync>d__31`2.MoveNext():175
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw():17
Microsoft.EntityFrameworkCore.Storage.ExecutionStrategy+<ExecuteImplementationAsync>d__31`2.MoveNext()
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw():17
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task):38
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task):46
 
Microsoft.EntityFrameworkCore.Query.Internal.AsyncQueryingEnumerable`1+AsyncEnumerator+<MoveNext>d__11.MoveNext():451
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw():17
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task):38
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task):46
 
Microsoft.EntityFrameworkCore.Query.Internal.AsyncLinqOperatorProvider+ExceptionInterceptor`1+EnumeratorExceptionInterceptor+<MoveNext>d__5.MoveNext():394
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw():17
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task):38
System.Linq.AsyncEnumerable+<Aggregate_>d__6`3.MoveNext() in D:\a\1\s\Ix.NET\Source\System.Interactive.Async\Aggregate.cs:120
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw():17
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task):38
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task):46
 
Vas.Dal.Ops.CompanyDataStore+<GetCompaniesAndAccessRequestsAsync>d__6.MoveNext() in /src/Vas.Dal/Ops/CompanyDataStore.cs:110
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw():17
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task):38
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task):46
 
Vas.Services.Business.CompanyService+<GetUserCompaniesAsync>d__12.MoveNext() in /src/Vas.Services/Business/CompanyService.cs:90
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw():17
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task):38
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task):46
 
Vas.Api.Controllers.CompanyController+<GetMyCompanies>d__14.MoveNext() in /src/Vas.Api/Controllers/CompanyController.cs:281
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw():17
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task):38
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task):46
 
Microsoft.AspNetCore.Mvc.Infrastructure.ActionMethodExecutor+TaskOfIActionResultExecutor+<Execute>d__0.MoveNext():182
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw():17
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task):38
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task):46
 
Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker+<<InvokeActionMethodAsync>g__Awaited|12_0>d.MoveNext():174
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw():17
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task):38
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task):46
 
Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker+<<InvokeNextActionFilterAsync>g__Awaited|10_0>d.MoveNext():353
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw():17
Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Rethrow(ActionExecutedContextSealed context):47
Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted):961
Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker+<<InvokeInnerFilterAsync>g__Awaited|13_0>d.MoveNext():279
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw():17
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task):38
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task):46
 
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker+<<InvokeNextExceptionFilterAsync>g__Awaited|25_0>d.MoveNext():342
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw():17
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ExceptionContextSealed context):21
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted):2127
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker+<<InvokeFilterPipelineAsync>g__Awaited|19_0>d.MoveNext():279
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw():17
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task):38
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task):46
 
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker+<<InvokeAsync>g__Awaited|17_0>d.MoveNext():190
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw():17
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task):38
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task):46
 
Microsoft.AspNetCore.Routing.EndpointMiddleware+<<Invoke>g__AwaitRequestTask|6_0>d.MoveNext():169
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw():17
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task):38
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task):46
 
Microsoft.AspNetCore.Authorization.Policy.AuthorizationMiddlewareResultHandler+<HandleAsync>d__0.MoveNext():824
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw():17
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task):38
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task):46
 
Microsoft.AspNetCore.Authorization.AuthorizationMiddleware+<Invoke>d__6.MoveNext():1009
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw():17
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task):38
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task):46
 
Microsoft.AspNetCore.Authentication.AuthenticationMiddleware+<Invoke>d__6.MoveNext():967
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw():17
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task):38
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task):46
 
Microsoft.AspNetCore.Authentication.AuthenticationMiddleware+<Invoke>d__6.MoveNext():967
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw():17
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task):38
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task):46
 
Mindscape.Raygun4Net.ProfilingSupport.AspNetCoreInitializer+<WrapAndInvokeRequest>d__7.MoveNext():183
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw():17
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task):38
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task):46
 
Mindscape.Raygun4Net.AspNetCore.RaygunAspNetMiddleware+<Invoke>d__5.MoveNext():944

it's maybe related to this line?:

MySqlConnector/src/MySqlConnector/Protocol/Serialization/StreamByteHandler.cs

Line 66 in 855149d

bytesRead = await m_stream.ReadAsync(buffer).ConfigureAwait(false);

I am using version 0.49.0 though, but latest version also has the ConfigureAwait(false) call.
I am inclined to think that for a non-deterministic issue the reading of the stream was not completed and that caused the error in the library.

About ConfigureAwait(false): https://devblogs.microsoft.com/dotnet/configureawait-faq/#what-does-configureawaitfalse-do

bgrainger · 2022-07-27T15:33:49Z

bgrainger
Jul 27, 2022
Maintainer

ConfigureAwait(false) is not a problem; omitting it can lead to deadlock: https://twitter.com/bgrainger/status/938167570540007424

v0.49.0 is extremely old; I would strongly recommend updating to a newer version.

1 reply

pbarrios Jul 27, 2022
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Thank you!

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Await bug? #1195

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bgrainger Jul 27, 2022 Maintainer

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pbarrios Jul 27, 2022 Author

pbarrios
Jul 26, 2022

Replies: 1 comment 1 reply

bgrainger
Jul 27, 2022
Maintainer

pbarrios Jul 27, 2022
Author