Azure Maps - SSL connection could not be established

Question

I have Azure App Service that calls Maps API but get following error. What i am missing?

The SSL connection could not be established, see inner exception.

Exception:
System.Net.Http.HttpRequestException: The SSL connection could not be established, see inner exception.
---> System.IO.IOException: Unable to read data from 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.
--- End of inner exception stack trace ---
at System.Net.Sockets.Socket.AwaitableSocketAsyncEventArgs.ThrowException(SocketError error, CancellationToken cancellationToken)
at System.Net.Sockets.Socket.AwaitableSocketAsyncEventArgs.GetResult(Int16 token)
at System.Net.Security.SslStream.<FillHandshakeBufferAsync>g__InternalFillHandshakeBufferAsync|182_0TIOAdapter
at System.Net.Security.SslStream.ReceiveBlobAsyncTIOAdapter
at System.Net.Security.SslStream.ForceAuthenticationAsyncTIOAdapter
at System.Net.Http.ConnectHelper.EstablishSslConnectionAsyncCore(Boolean async, Stream stream, SslClientAuthenticationOptions sslOptions, CancellationToken cancellationToken)
--- End of inner exception stack trace ---
at System.Net.Http.ConnectHelper.EstablishSslConnectionAsyncCore(Boolean async, Stream stream, SslClientAuthenticationOptions sslOptions, CancellationToken cancellationToken)
at System.Net.Http.HttpConnectionPool.ConnectAsync(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken)
at System.Net.Http.HttpConnectionPool.CreateHttp11ConnectionAsync(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken)
at System.Net.Http.HttpConnectionPool.GetHttpConnectionAsync(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken)
at System.Net.Http.HttpConnectionPool.SendWithRetryAsync(HttpRequestMessage request, Boolean async, Boolean doRequestAuth, CancellationToken cancellationToken)
at System.Net.Http.RedirectHandler.SendAsync(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken)
at System.Net.Http.DiagnosticsHandler.SendAsyncCore(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken)
at System.Net.Http.HttpClient.SendAsyncCore(HttpRequestMessage request, HttpCompletionOption completionOption, Boolean async, Boolean emitTelemetryStartStop, CancellationToken cancellationToken)
at AzureMapsToolkit.Common.BaseServices.GetDataT
at AzureMapsToolkit.Common.BaseServices.ExecuteRequestT,U
at AzureMapsToolkit.AzureMapsServices.GetSearchAddress(SearchAddressRequest searchAddressRequest)

Answer 1

I suspect that you are trying to connect at a lower security level. See https://learn.microsoft.com/en-us/azure/azure-maps/azure-maps-authentication and ensure you are not using TLS 1.0 or TLS 1.1.

Answer 2

Can you provide a sample of the call you are making? Generally this can be caused by either calling at the wrong security level or malformed request.

Answer 3

It works sometime and sometimes does not. Does not work when call comes from mobile device to App Service.

private async Task<Point> GetGeoCordinatePointFromAzureMapsAsync(string searchAddress)
        {
            try
            {
                var am = new AzureMapsToolkit.AzureMapsServices(_configuration[Constants.AzureMaps.Key]);

                var searchAddressRequest = new SearchAddressRequest
                {
                    Query = searchAddress,
                    Limit = 1
                };
                var resp = await am.GetSearchAddress(searchAddressRequest);
                if (resp.Error != null)
                {
                    //TODO: Handle Address Geo Coding Error
                }
                else
                {
                    var firstResult = resp.Result.Results.FirstOrDefault();
                    if (firstResult != null)
                    {
                        return new Point(firstResult.Position.Lon, firstResult.Position.Lat);
                    }
                }
            }
            catch(Exception ex)
            {
                _logger.LogError(ex, "Error in Azure Maps Address: " + searchAddress);
            }

            return null;
        }