Getting an error when calling SearchUserAsync

[Md23Mh]

I encounter the following error when calling SearchUserAsync. First time it's ok and there is no issue but a few minutes later it just wont work at all. However, if I restart the app it will be OK, yet again after a while the same problem will appear.

Any help would be greatly appreciated.

Here is the exception:

System.IO.IOException: Unable to write data to the transport connection: An existing connection was forcibly closed by the remote host.. ---> System.Net.Sockets.SocketException (10054): An existing connection was forcibly closed by the remote host. at System.Net.Sockets.Socket.AwaitableSocketAsyncEventArgs.CreateException(SocketError error, Boolean forAsyncThrow) at System.Net.Sockets.Socket.AwaitableSocketAsyncEventArgs.SendAsyncForNetworkStream(Socket socket, CancellationToken cancellationToken) at System.Net.Sockets.Socket.SendAsyncForNetworkStream(ReadOnlyMemory1 buffer, SocketFlags socketFlags, CancellationToken cancellationToken)
at System.Net.Sockets.NetworkStream.WriteAsync(Byte[] buffer, Int32 offset, Int32 size, CancellationToken cancellationToken)
at TLSharp.Core.Network.TcpTransport.Send(Byte[] packet, CancellationToken token)
at System.Runtime.CompilerServices.AsyncMethodBuilderCore.Start[TStateMachine](TStateMachine& stateMachine)
at TLSharp.Core.Network.TcpTransport.Send(Byte[] packet, CancellationToken token)
at TLSharp.Core.Network.MtProtoSender.Send(Byte[] packet, TLMethod request, CancellationToken token)
at System.Runtime.CompilerServices.AsyncMethodBuilderCore.Start[TStateMachine](TStateMachine& stateMachine)
at TLSharp.Core.Network.MtProtoSender.Send(Byte[] packet, TLMethod request, CancellationToken token)
at TLSharp.Core.Network.MtProtoSender.Send(TLMethod request, CancellationToken token)
at System.Runtime.CompilerServices.AsyncMethodBuilderCore.Start[TStateMachine](TStateMachine& stateMachine)
at TLSharp.Core.Network.MtProtoSender.Send(TLMethod request, CancellationToken token)
at TLSharp.Core.TelegramClient.RequestWithDcMigration(TLMethod request, CancellationToken token)
at System.Runtime.CompilerServices.AsyncMethodBuilderCore.Start[TStateMachine](TStateMachine& stateMachine)
at TLSharp.Core.TelegramClient.RequestWithDcMigration(TLMethod request, CancellationToken token)
at TLSharp.Core.TelegramClient.SendRequestAsync[T](TLMethod methodToExecute, CancellationToken token)
at System.Runtime.CompilerServices.AsyncMethodBuilderCore.Start[TStateMachine](TStateMachine& stateMachine)
at TLSharp.Core.TelegramClient.SendRequestAsync[T](TLMethod methodToExecute, CancellationToken token)
at TLSharp.Core.TelegramClient.SendAuthenticatedRequestAsync[T](TLMethod methodToExecute, CancellationToken token)
at System.Runtime.CompilerServices.AsyncMethodBuilderCore.Start[TStateMachine](TStateMachine& stateMachine)
at TLSharp.Core.TelegramClient.SendAuthenticatedRequestAsync[T](TLMethod methodToExecute, CancellationToken token)
at TLSharp.Core.TelegramClient.SearchUserAsync(String q, Int32 limit, CancellationToken token)
at System.Runtime.CompilerServices.AsyncMethodBuilderCore.Start[TStateMachine](TStateMachine& stateMachine)
at TLSharp.Core.TelegramClient.SearchUserAsync(String q, Int32 limit, CancellationToken token)
at DiscussFarsi.Service.Implementation.DiscussChannelService.JoinCommentFarsiAdminToChannelsAsync(String channelTitle) in D:\DiscussFarsi\DiscussFarsi\src\DiscussFarsi.Service\Implementation\DiscussChannelService.cs:line 117
at System.Runtime.CompilerServices.AsyncMethodBuilderCore.Start[TStateMachine](TStateMachine& stateMachine)
at DiscussFarsi.Service.Implementation.DiscussChannelService.JoinCommentFarsiAdminToChannelsAsync(String channelTitle)
at DiscussFarsi.Service.Implementation.DiscussChannelService.AddOrUpdateAsync(DiscussChannel channel, CancellationToken cancellationToken) in D:\DiscussFarsi\DiscussFarsi\src\DiscussFarsi.Service\Implementation\DiscussChannelService.cs:line 96
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Runtime.CompilerServices.AsyncTaskMethodBuilder1.AsyncStateMachineBox1.MoveNext(Thread threadPoolThread)
at System.Runtime.CompilerServices.TaskAwaiter.<>c.b__12_0(Action innerContinuation, Task innerTask)
at System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(Action action, Boolean allowInlining)
at System.Threading.Tasks.Task.RunContinuations(Object continuationObject)
at System.Threading.Tasks.Task1.TrySetResult(TResult result) at System.Runtime.CompilerServices.AsyncTaskMethodBuilder1.SetExistingTaskResult(Task1 task, TResult result) at System.Runtime.CompilerServices.AsyncTaskMethodBuilder1.SetResult(TResult result)
at Microsoft.EntityFrameworkCore.DbContext.SaveChangesAsync(Boolean acceptAllChangesOnSuccess, CancellationToken cancellationToken)
at System.Runtime.CompilerServices.AsyncTaskMethodBuilder1.AsyncStateMachineBox1.ExecutionContextCallback(Object s)
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Runtime.CompilerServices.AsyncTaskMethodBuilder1.AsyncStateMachineBox1.MoveNext(Thread threadPoolThread)
at System.Runtime.CompilerServices.AsyncTaskMethodBuilder1.AsyncStateMachineBox1.MoveNext()
at System.Runtime.CompilerServices.TaskAwaiter.<>c.b__12_0(Action innerContinuation, Task innerTask)
at System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(Action action, Boolean allowInlining)
at System.Threading.Tasks.Task.RunContinuations(Object continuationObject)
at System.Threading.Tasks.Task1.TrySetResult(TResult result) at System.Runtime.CompilerServices.AsyncTaskMethodBuilder1.SetExistingTaskResult(Task1 task, TResult result) at System.Runtime.CompilerServices.AsyncTaskMethodBuilder1.SetResult(TResult result)
at Microsoft.EntityFrameworkCore.SqlServer.Storage.Internal.SqlServerExecutionStrategy.ExecuteAsync[TState,TResult](TState state, Func4 operation, Func4 verifySucceeded, CancellationToken cancellationToken)
at System.Runtime.CompilerServices.AsyncTaskMethodBuilder1.AsyncStateMachineBox1.ExecutionContextCallback(Object s)
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Runtime.CompilerServices.AsyncTaskMethodBuilder1.AsyncStateMachineBox1.MoveNext(Thread threadPoolThread)
at System.Runtime.CompilerServices.AsyncTaskMethodBuilder1.AsyncStateMachineBox1.MoveNext()
at System.Runtime.CompilerServices.TaskAwaiter.<>c.b__12_0(Action innerContinuation, Task innerTask)
at System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(Action action, Boolean allowInlining)
at System.Threading.Tasks.Task.RunContinuations(Object continuationObject)
at System.Threading.Tasks.Task1.TrySetResult(TResult result) at System.Runtime.CompilerServices.AsyncTaskMethodBuilder1.SetExistingTaskResult(Task1 task, TResult result) at Microsoft.EntityFrameworkCore.ChangeTracking.Internal.StateManager.SaveChangesAsync(DbContext _, Boolean acceptAllChangesOnSuccess, CancellationToken cancellationToken) at System.Runtime.CompilerServices.AsyncTaskMethodBuilder1.AsyncStateMachineBox1.ExecutionContextCallback(Object s) at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state) at System.Runtime.CompilerServices.AsyncTaskMethodBuilder1.AsyncStateMachineBox1.MoveNext(Thread threadPoolThread) at System.Runtime.CompilerServices.AsyncTaskMethodBuilder1.AsyncStateMachineBox1.MoveNext() at System.Runtime.CompilerServices.TaskAwaiter.<>c.<OutputWaitEtwEvents>b__12_0(Action innerContinuation, Task innerTask) at System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(Action action, Boolean allowInlining) at System.Threading.Tasks.Task.RunContinuations(Object continuationObject) at System.Threading.Tasks.Task1.TrySetResult(TResult result)
at System.Runtime.CompilerServices.AsyncTaskMethodBuilder1.SetExistingTaskResult(Task1 task, TResult result)
at System.Runtime.CompilerServices.AsyncTaskMethodBuilder1.SetResult(TResult result) at Microsoft.EntityFrameworkCore.ChangeTracking.Internal.StateManager.SaveChangesAsync(IList1 entriesToSave, CancellationToken cancellationToken)
at System.Runtime.CompilerServices.AsyncTaskMethodBuilder1.AsyncStateMachineBox1.ExecutionContextCallback(Object s)
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Runtime.CompilerServices.AsyncTaskMethodBuilder1.AsyncStateMachineBox1.MoveNext(Thread threadPoolThread)
at System.Runtime.CompilerServices.AsyncTaskMethodBuilder1.AsyncStateMachineBox1.MoveNext()
at System.Runtime.CompilerServices.TaskAwaiter.<>c.b__12_0(Action innerContinuation, Task innerTask)
at System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(Action action, Boolean allowInlining)
at System.Threading.Tasks.Task.RunContinuations(Object continuationObject)
at System.Threading.Tasks.Task1.TrySetResult(TResult result) at System.Runtime.CompilerServices.AsyncTaskMethodBuilder1.SetExistingTaskResult(Task1 task, TResult result) at Microsoft.EntityFrameworkCore.Update.Internal.BatchExecutor.ExecuteAsync(IEnumerable1 commandBatches, IRelationalConnection connection, CancellationToken cancellationToken)
at System.Runtime.CompilerServices.AsyncTaskMethodBuilder1.AsyncStateMachineBox1.ExecutionContextCallback(Object s)
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Runtime.CompilerServices.AsyncTaskMethodBuilder1.AsyncStateMachineBox1.MoveNext(Thread threadPoolThread)
at System.Runtime.CompilerServices.AsyncTaskMethodBuilder1.AsyncStateMachineBox1.MoveNext()
at System.Runtime.CompilerServices.TaskAwaiter.<>c.b__12_0(Action innerContinuation, Task innerTask)
at System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(Action action, Boolean allowInlining)
at System.Threading.Tasks.Task.RunContinuations(Object continuationObject)
at System.Threading.Tasks.Task1.TrySetResult(TResult result) at System.Runtime.CompilerServices.AsyncTaskMethodBuilder1.SetExistingTaskResult(Task1 task, TResult result) at System.Runtime.CompilerServices.AsyncTaskMethodBuilder.SetResult() at Microsoft.EntityFrameworkCore.Update.ReaderModificationCommandBatch.ExecuteAsync(IRelationalConnection connection, CancellationToken cancellationToken) at System.Runtime.CompilerServices.AsyncTaskMethodBuilder1.AsyncStateMachineBox1.ExecutionContextCallback(Object s) at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state) at System.Runtime.CompilerServices.AsyncTaskMethodBuilder1.AsyncStateMachineBox1.MoveNext(Thread threadPoolThread) at System.Runtime.CompilerServices.AsyncTaskMethodBuilder1.AsyncStateMachineBox1.MoveNext() at System.Runtime.CompilerServices.TaskAwaiter.<>c.<OutputWaitEtwEvents>b__12_0(Action innerContinuation, Task innerTask) at System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(Action action, Boolean allowInlining) at System.Threading.Tasks.Task.RunContinuations(Object continuationObject) at System.Threading.Tasks.Task1.TrySetResult(TResult result)
at System.Runtime.CompilerServices.AsyncTaskMethodBuilder1.SetExistingTaskResult(Task1 task, TResult result)
at Microsoft.EntityFrameworkCore.Storage.RelationalCommand.ExecuteReaderAsync(RelationalCommandParameterObject parameterObject, CancellationToken cancellationToken)
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Runtime.CompilerServices.AsyncTaskMethodBuilder1.AsyncStateMachineBox1.MoveNext(Thread threadPoolThread)
at System.Runtime.CompilerServices.TaskAwaiter.<>c.b__12_0(Action innerContinuation, Task innerTask)
at System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(Action action, Boolean allowInlining)
at System.Threading.Tasks.Task.RunContinuations(Object continuationObject)
at System.Threading.Tasks.Task.FinishSlow(Boolean userDelegateExecute)
at System.Threading.Tasks.Task.ExecuteWithThreadLocal(Task& currentTaskSlot, Thread threadPoolThread)
at System.Threading.Tasks.ThreadPoolTaskScheduler.TryExecuteTaskInline(Task task, Boolean taskWasPreviouslyQueued)
at System.Threading.Tasks.TaskScheduler.TryRunInline(Task task, Boolean taskWasPreviouslyQueued)
at System.Threading.Tasks.TaskContinuation.InlineIfPossibleOrElseQueue(Task task, Boolean needsProtection)
at System.Threading.Tasks.ContinueWithTaskContinuation.Run(Task completedTask, Boolean canInlineContinuationTask)
at System.Threading.Tasks.Task.RunContinuations(Object continuationObject)
at System.Threading.Tasks.Task1.TrySetResult(TResult result) at System.Threading.Tasks.UnwrapPromise1.TrySetFromTask(Task task, Boolean lookForOce)
at System.Threading.Tasks.UnwrapPromise`1.ProcessInnerTask(Task task)
at System.Threading.Tasks.Task.RunContinuations(Object continuationObject)
at System.Threading.Tasks.Task.FinishSlow(Boolean userDelegateExecute)
at System.Threading.Tasks.Task.ExecuteWithThreadLocal(Task& currentTaskSlot, Thread threadPoolThread)
at System.Threading.ThreadPoolWorkQueue.Dispatch()
--- End of stack trace from previous location ---

--- End of inner exception stack trace ---
at TLSharp.Core.Network.TcpTransport.Send(Byte[] packet, CancellationToken token)
at TLSharp.Core.Network.MtProtoSender.Send(Byte[] packet, TLMethod request, CancellationToken token)
at TLSharp.Core.Network.MtProtoSender.Send(TLMethod request, CancellationToken token)
at TLSharp.Core.TelegramClient.RequestWithDcMigration(TLMethod request, CancellationToken token)
at TLSharp.Core.TelegramClient.SendRequestAsync[T](TLMethod methodToExecute, CancellationToken token)
at TLSharp.Core.TelegramClient.SendAuthenticatedRequestAsync[T](TLMethod methodToExecute, CancellationToken token)
at TLSharp.Core.TelegramClient.SearchUserAsync(String q, Int32 limit, CancellationToken token)
`

[CeSiumUA]

This problem is not with SearchUser, it is with authentication itself
The connection is usually decayed in about 5-10 minutes, so, you would better call telegramClient.ConnectAsync() before every such request