Come risolvere SQL eccezione accade solo in Android?

Sto usando i moduli xamarin per sviluppare un'app multipiattaforma. Come parte della mia app, ho una pagina di accesso in cui l'utente inserisce le sue credenziali e ottiene l'autenticazione. Sto usando l'entity framework core e mi sto connettendo a un server SQL che è ospitato sul cloud di Azures. Il codice funziona e posso accedere correttamente, ma solo con IOS e UWP, se provo con Android ricevo questa eccezione:

System.Data.SqlClient.SqlException: <Timeout exceeded getting exception details>

Se continuo il debug ricevo un'altra eccezione che è:

System.Data.SqlClient.SqlException: Snix_PreLogin (provider: SNI_PN6, error: 31 - SNI_ERROR_31) Snix_PreLogin (provider: SNI_PN6, error: 31 - SNI_ERROR_31)

Questo è il mio Icommand:

LoginCommand = new Command(async () => await Login());

questo è il mio metodo all'interno del modello di visualizzazione:

    private async Task Login()
    {
        IsBusy = true;
        if (String.IsNullOrWhiteSpace(_emailField) || String.IsNullOrWhiteSpace(_passwordField))
            await App.Current.MainPage.DisplayAlert("Error", "All fields must contain values.", "Ok");
        else
        {
            if (await DatabaseHandler.LoginUser(_emailField, _passwordField))
            {
                App.CurrentAccount = new UserAccount { Email = _emailField, Password = _passwordField };
                App.Current.MainPage = new MainPage();
            }
            else
                await App.Current.MainPage.DisplayAlert("Error", "Email or password are incorrect.", "Ok");
        }
        IsBusy = false;
    }

e questo è il mio metodo all'interno di DatabaseHandler:

    public static async Task<bool> LoginUser(string email, string password)
    {
        AzureContext AzureDb = new AzureContext();
        App.CurrentAccount = await AzureDb.UserAccounts.SingleOrDefaultAsync(account => account.Email == email && account.Password == password);
        return (App.CurrentAccount == null) ? false : true;
    }

Un'altra cosa che vale la pena ricordare è che quando commento le linee di IsBusy nel metodo di accesso che sono responsabili dell'indicatore di attività, non ottengo più un'eccezione. Ma, non funziona ancora, invece di un'eccezione l'interfaccia utente si blocca solo per un lungo periodo e dopo lo sblocco non accade nulla.

L'aiuto sarebbe apprezzato

EDIT: Dopo aver giocato un po 'con l'eccezione gestendo l'eccezione completa ottengo è questo:

{System.Data.SqlClient.SqlException (0x80131904): Snix_PreLogin (provider: SNI_PN6, error: 31 - SNI_ERROR_31)Snix_PreLogin (provider: SNI_PN6, error: 31 - SNI_ERROR_31) ---> System.AggregateException: One or more errors occurred. (Authentication failed, see inner exception.)
---> System.Security.Authentication.AuthenticationException: Authentication failed, see inner exception. ---> System.AggregateException: One or more errors occurred. (Unable to write data to the transport connection: Connection reset by peer.)
---> System.IO.IOException: Unable to write data to the transport connection: Connection reset by peer. ---> System.Net.Sockets.SocketException: Connection reset by peer  at System.Net.Sockets.Socket.Send (System.Byte[] buffer, System.Int32 offset, System.Int32 size, System.Net.Sockets.SocketFlags socketFlags) [0x00016] in <634e1667c20e48cfb6aa884228f8db67>:0   at System.Net.Sockets.NetworkStream.Write (System.Byte[] buffer, System.Int32 offset, System.Int32 size) [0x0009b] in <634e1667c20e48cfb6aa884228f8db67>:0    --- End of inner exception stack trace ---  at System.Net.Sockets.NetworkStream.Write (System.Byte[] buffer, System.Int32 offset, System.Int32 size) [0x000e2] in <634e1667c20e48cfb6aa884228f8db67>:0   at System.Data.SqlClient.SNI.SslOverTdsStream.WriteInternal (System.Byte[] buffer, System.Int32 offset, System.Int32 count, System.Threading.CancellationToken token, System.Boolean async) [0x0017b] in <fb2d0bc6c8f7446eaa3eaa0ac572f8d3>:0    --- End of inner exception stack trace ---  at System.Threading.Tasks.Task.ThrowIfExceptional (System.Boolean includeTaskCanceledExceptions) [0x00011] in <84c6975c2cbc47b489a2a76477d7a312>:0   at System.Threading.Tasks.Task.Wait (System.Int32 millisecondsTimeout, System.Threading.CancellationToken cancellationToken) [0x00043] in <84c6975c2cbc47b489a2a76477d7a312>:0   at System.Threading.Tasks.Task.Wait () [0x00000] in <84c6975c2cbc47b489a2a76477d7a312>:0   at System.Data.SqlClient.SNI.SslOverTdsStream.Write (System.Byte[] buffer, System.Int32 offset, System.Int32 count) [0x0000f] in <fb2d0bc6c8f7446eaa3eaa0ac572f8d3>:0   at Mono.Net.Security.MobileAuthenticatedStream.<InnerWrite>b__86_0 () [0x00006] in <634e1667c20e48cfb6aa884228f8db67>:0   at System.Threading.Tasks.Task.InnerInvoke () [0x0000f] in <84c6975c2cbc47b489a2a76477d7a312>:0   at System.Threading.Tasks.Task.Execute () [0x00000] in <84c6975c2cbc47b489a2a76477d7a312>:0 --- End of stack trace from previous location where exception was thrown ---  at Mono.Net.Security.MobileAuthenticatedStream.InnerWrite (System.Boolean sync, System.Threading.CancellationToken cancellationToken) [0x000d3] in <634e1667c20e48cfb6aa884228f8db67>:0   at Mono.Net.Security.AsyncProtocolRequest.ProcessOperation (System.Threading.CancellationToken cancellationToken) [0x00196] in <634e1667c20e48cfb6aa884228f8db67>:0   at Mono.Net.Security.AsyncProtocolRequest.StartOperation (System.Threading.CancellationToken cancellationToken) [0x0008b] in <634e1667c20e48cfb6aa884228f8db67>:0    --- End of inner exception stack trace ---  at Mono.Net.Security.MobileAuthenticatedStream.ProcessAuthentication (System.Boolean runSynchronously, Mono.Net.Security.MonoSslAuthenticationOptions options, System.Threading.CancellationToken cancellationToken) [0x00252] in <634e1667c20e48cfb6aa884228f8db67>:0    --- End of inner exception stack trace ---  at System.Threading.Tasks.Task.ThrowIfExceptional (System.Boolean includeTaskCanceledExceptions) [0x00011] in <84c6975c2cbc47b489a2a76477d7a312>:0   at System.Threading.Tasks.Task.Wait (System.Int32 millisecondsTimeout, System.Threading.CancellationToken cancellationToken) [0x00043] in <84c6975c2cbc47b489a2a76477d7a312>:0   at System.Threading.Tasks.Task.Wait () [0x00000] in <84c6975c2cbc47b489a2a76477d7a312>:0   at Mono.Net.Security.MobileAuthenticatedStream.AuthenticateAsClient (System.String targetHost, System.Security.Cryptography.X509Certificates.X509CertificateCollection clientCertificates, System.Security.Authentication.SslProtocols enabledSslProtocols, System.Boolean checkCertificateRevocation) [0x0003d] in <634e1667c20e48cfb6aa884228f8db67>:0   at (wrapper remoting-invoke-with-check) Mono.Net.Security.MobileAuthenticatedStream.AuthenticateAsClient(string,System.Security.Cryptography.X509Certificates.X509CertificateCollection,System.Security.Authentication.SslProtocols,bool) at Mono.Net.Security.MobileAuthenticatedStream.AuthenticateAsClient (System.String targetHost) [0x00007] in <634e1667c20e48cfb6aa884228f8db67>:0   at System.Net.Security.SslStream.AuthenticateAsClient (System.String targetHost) [0x00006] in <634e1667c20e48cfb6aa884228f8db67>:0   at System.Data.SqlClient.SNI.SNITCPHandle.EnableSsl (System.UInt32 options) [0x0000c] in <fb2d0bc6c8f7446eaa3eaa0ac572f8d3>:0   at System.Data.SqlClient.SNI.SNIProxy.EnableSsl (System.Data.SqlClient.SNI.SNIHandle handle, System.UInt32 options) [0x00000] in <fb2d0bc6c8f7446eaa3eaa0ac572f8d3>:0 ---> (Inner Exception #0) System.Security.Authentication.AuthenticationException: Authentication failed, see inner exception. ---> System.AggregateException: One or more errors occurred. (Unable to write data to the transport connection: Connection reset by peer.)
---> System.IO.IOException: Unable to write data to the transport connection: Connection reset by peer. ---> System.Net.Sockets.SocketException: Connection reset by peer  at System.Net.Sockets.Socket.Send (System.Byte[] buffer, System.Int32 offset, System.Int32 size, System.Net.Sockets.SocketFlags socketFlags) [0x00016] in <634e1667c20e48cfb6aa884228f8db67>:0   at System.Net.Sockets.NetworkStream.Write (System.Byte[] buffer, System.Int32 offset, System.Int32 size) [0x0009b] in <634e1667c20e48cfb6aa884228f8db67>:0    --- End of inner exception stack trace ---  at System.Net.Sockets.NetworkStream.Write (System.Byte[] buffer, System.Int32 offset, System.Int32 size) [0x000e2] in <634e1667c20e48cfb6aa884228f8db67>:0   at System.Data.SqlClient.SNI.SslOverTdsStream.WriteInternal (System.Byte[] buffer, System.Int32 offset, System.Int32 count, System.Threading.CancellationToken token, System.Boolean async) [0x0017b] in <fb2d0bc6c8f7446eaa3eaa0ac572f8d3>:0    --- End of inner exception stack trace ---  at System.Threading.Tasks.Task.ThrowIfExceptional (System.Boolean includeTaskCanceledExceptions) [0x00011] in <84c6975c2cbc47b489a2a76477d7a312>:0   at System.Threading.Tasks.Task.Wait (System.Int32 millisecondsTimeout, System.Threading.CancellationToken cancellationToken) [0x00043] in <84c6975c2cbc47b489a2a76477d7a312>:0   at System.Threading.Tasks.Task.Wait () [0x00000] in <84c6975c2cbc47b489a2a76477d7a312>:0   at System.Data.SqlClient.SNI.SslOverTdsStream.Write (System.Byte[] buffer, System.Int32 offset, System.Int32 count) [0x0000f] in <fb2d0bc6c8f7446eaa3eaa0ac572f8d3>:0   at Mono.Net.Security.MobileAuthenticatedStream.<InnerWrite>b__86_0 () [0x00006] in <634e1667c20e48cfb6aa884228f8db67>:0   at System.Threading.Tasks.Task.InnerInvoke () [0x0000f] in <84c6975c2cbc47b489a2a76477d7a312>:0   at System.Threading.Tasks.Task.Execute () [0x00000] in <84c6975c2cbc47b489a2a76477d7a312>:0 --- End of stack trace from previous location where exception was thrown ---  at Mono.Net.Security.MobileAuthenticatedStream.InnerWrite (System.Boolean sync, System.Threading.CancellationToken cancellationToken) [0x000d3] in <634e1667c20e48cfb6aa884228f8db67>:0   at Mono.Net.Security.AsyncProtocolRequest.ProcessOperation (System.Threading.CancellationToken cancellationToken) [0x00196] in <634e1667c20e48cfb6aa884228f8db67>:0   at Mono.Net.Security.AsyncProtocolRequest.StartOperation (System.Threading.CancellationToken cancellationToken) [0x0008b] in <634e1667c20e48cfb6aa884228f8db67>:0    --- End of inner exception stack trace ---  at Mono.Net.Security.MobileAuthenticatedStream.ProcessAuthentication (System.Boolean runSynchronously, Mono.Net.Security.MonoSslAuthenticationOptions options, System.Threading.CancellationToken cancellationToken) [0x00252] in <634e1667c20e48cfb6aa884228f8db67>:0 <---  at System.Data.SqlClient.SqlInternalConnectionTds..ctor (System.Data.ProviderBase.DbConnectionPoolIdentity identity, System.Data.SqlClient.SqlConnectionString connectionOptions, System.Data.SqlClient.SqlCredential credential, System.Object providerInfo, System.String newPassword, System.Security.SecureString newSecurePassword, System.Boolean redirectedUserInstance, System.Data.SqlClient.SqlConnectionString userConnectionOptions, System.Data.SqlClient.SessionData reconnectSessionData, System.Boolean applyTransientFaultHandling) [0x00163] in <fb2d0bc6c8f7446eaa3eaa0ac572f8d3>:0   at System.Data.SqlClient.SqlConnectionFactory.CreateConnection (System.Data.Common.DbConnectionOptions options, System.Data.Common.DbConnectionPoolKey poolKey, System.Object poolGroupProviderInfo, System.Data.ProviderBase.DbConnectionPool pool, System.Data.Common.DbConnection owningConnection, System.Data.Common.DbConnectionOptions userOptions) [0x00144] in <fb2d0bc6c8f7446eaa3eaa0ac572f8d3>:0   at System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection (System.Data.ProviderBase.DbConnectionPool pool, System.Data.Common.DbConnection owningObject, System.Data.Common.DbConnectionOptions options, System.Data.Common.DbConnectionPoolKey poolKey, System.Data.Common.DbConnectionOptions userOptions) [0x0000c] in <fb2d0bc6c8f7446eaa3eaa0ac572f8d3>:0   at System.Data.ProviderBase.DbConnectionPool.CreateObject (System.Data.Common.DbConnection owningObject, System.Data.Common.DbConnectionOptions userOptions, System.Data.ProviderBase.DbConnectionInternal oldConnection) [0x00184] in <fb2d0bc6c8f7446eaa3eaa0ac572f8d3>:0   at System.Data.ProviderBase.DbConnectionPool.UserCreateRequest (System.Data.Common.DbConnection owningObject, System.Data.Common.DbConnectionOptions userOptions, System.Data.ProviderBase.DbConnectionInternal oldConnection) [0x00040] in <fb2d0bc6c8f7446eaa3eaa0ac572f8d3>:0   at System.Data.ProviderBase.DbConnectionPool.TryGetConnection (System.Data.Common.DbConnection owningObject, System.UInt32 waitForMultipleObjectsTimeout, System.Boolean allowCreate, System.Boolean onlyOneCheckConnection, System.Data.Common.DbConnectionOptions userOptions, System.Data.ProviderBase.DbConnectionInternal& connection) [0x000a4] in <fb2d0bc6c8f7446eaa3eaa0ac572f8d3>:0   at System.Data.ProviderBase.DbConnectionPool.WaitForPendingOpen () [0x00092] in <fb2d0bc6c8f7446eaa3eaa0ac572f8d3>:0 --- End of stack trace from previous location where exception was thrown ---  at Microsoft.EntityFrameworkCore.Storage.RelationalConnection.OpenDbConnectionAsync (System.Boolean errorsExpected, System.Threading.CancellationToken cancellationToken) [0x000f9] in <c486d2adb419411a9a11f423095801e5>:0   at Microsoft.EntityFrameworkCore.Storage.RelationalConnection.OpenAsync (System.Threading.CancellationToken cancellationToken, System.Boolean errorsExpected) [0x0009b] in <c486d2adb419411a9a11f423095801e5>:0   at Microsoft.EntityFrameworkCore.Query.Internal.AsyncQueryingEnumerable`1+AsyncEnumerator[T].BufferlessMoveNext (Microsoft.EntityFrameworkCore.DbContext _, System.Boolean buffer, System.Threading.CancellationToken cancellationToken) [0x00098] in <c486d2adb419411a9a11f423095801e5>:0   at Microsoft.EntityFrameworkCore.SqlServer.Storage.Internal.SqlServerExecutionStrategy.ExecuteAsync[TState,TResult] (TState state, System.Func`4[T1,T2,T3,TResult] operation, System.Func`4[T1,T2,T3,TResult] verifySucceeded, System.Threading.CancellationToken cancellationToken) [0x00089] in <70780d57b1e644f080d08b633fa994bf>:0   at Microsoft.EntityFrameworkCore.Query.Internal.AsyncQueryingEnumerable`1+AsyncEnumerator[T].MoveNext (System.Threading.CancellationToken cancellationToken) [0x00135] in <c486d2adb419411a9a11f423095801e5>:0   at System.Linq.AsyncEnumerable.SingleOrDefault_[TSource] (System.Collections.Generic.IAsyncEnumerable`1[T] source, System.Threading.CancellationToken cancellationToken) [0x000d7] in <afef21b57ad6402f8df4c5299ba699e2>:0   at Microsoft.EntityFrameworkCore.Query.Internal.AsyncLinqOperatorProvider+TaskResultAsyncEnumerable`1+Enumerator[T].MoveNext (System.Threading.CancellationToken cancellationToken) [0x00075] in <e66a1f96e9734a7fac7cea0901022728>:0   at System.Linq.AsyncEnumerable+SelectEnumerableAsyncIterator`2[TSource,TResult].MoveNextCore (System.Threading.CancellationToken cancellationToken) [0x000a6] in <afef21b57ad6402f8df4c5299ba699e2>:0   at System.Linq.AsyncEnumerable+AsyncIterator`1[TSource].MoveNext (System.Threading.CancellationToken cancellationToken) [0x00101] in <afef21b57ad6402f8df4c5299ba699e2>:0   at Microsoft.EntityFrameworkCore.Query.Internal.AsyncLinqOperatorProvider+ExceptionInterceptor`1+EnumeratorExceptionInterceptor[T].MoveNext (System.Threading.CancellationToken cancellationToken) [0x00143] in <e66a1f96e9734a7fac7cea0901022728>:0   at Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.ExecuteSingletonAsyncQuery[TResult] (Microsoft.EntityFrameworkCore.Query.QueryContext queryContext, System.Func`2[T,TResult] compiledQuery, Microsoft.EntityFrameworkCore.Diagnostics.IDiagnosticsLogger`1[TLoggerCategory] logger, System.Type contextType) [0x000d6] in <e66a1f96e9734a7fac7cea0901022728>:0   at Life_Programmer.Services.DatabaseServices.DatabaseHandler.LoginUser (System.String email, System.String password) [0x00108] in C:\Users\Meydan\source\repos\Life_Programmer\Life_Programmer\Life_Programmer\Services\DatabaseServices\DatabaseHandler.cs:43 ClientConnectionId:7453d528-808d-4249-b0db-ee7d31c86008}

EDIT2: Se gestisco l'eccezione, l'applicazione non si blocca, quindi dopo il primo tentativo funziona come previsto. Quindi il problema si verifica solo al primo tentativo di accesso e solo con Android.