System.Net.WebException: Unable to connect to the remote server

[snpdev]

Please assist with this problem I encounter:

On the page http://localhost:8081/Home/Stateful, when I enter a key value paid and click the Add button, a "404 Not Found" is displayed (Figure 1).

The debug output is as follows:

Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker: Information: Executing action method WebService.Controllers.StatefulBackendServiceController.PutAsync (WebService) with arguments ([B, Bing]) - ModelState is Valid
...
Exception thrown: 'System.Net.Http.HttpRequestException' in mscorlib.dll
Microsoft.AspNetCore.Diagnostics.ExceptionHandlerMiddleware: Error: An unhandled exception has occurred: An error occurred while sending the request.

System.Net.Http.HttpRequestException: An error occurred while sending the request. ---> System.Net.WebException: Unable to connect to the remote server ---> System.Net.Sockets.SocketException: No connection could be made because the target machine actively refused it 127.0.0.1:19081
   at System.Net.Sockets.Socket.EndConnect(IAsyncResult asyncResult)
   at System.Net.ServicePoint.ConnectSocketInternal(Boolean connectFailure, Socket s4, Socket s6, Socket& socket, IPAddress& address, ConnectSocketState state, IAsyncResult asyncResult, Exception& exception)
   --- End of inner exception stack trace ---
   at System.Net.HttpWebRequest.EndGetRequestStream(IAsyncResult asyncResult, TransportContext& context)
   at System.Net.Http.HttpClientHandler.GetRequestStreamCallback(IAsyncResult ar)
   --- End of inner exception stack trace ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
   at WebService.Controllers.StatefulBackendServiceController.<PutAsync>d__6.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.<InvokeActionFilterAsync>d__28.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.<InvokeAsync>d__18.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.AspNetCore.Builder.RouterMiddleware.<Invoke>d__4.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.AspNetCore.Diagnostics.ExceptionHandlerMiddleware.<Invoke>d__6.MoveNext()

Figure 1

[GopiMtp]

The same error on GetAll clicks as well. It tries to perform GET Operation at http://localhost:19081/GettingStartedApplication/StatefulBackendService/api/values?PartitionKind=Int64Range&PartitionKey=-9223372036854775808 which returns "Not Response!"

I'm not sure where that port "19081" comes into pictures, where the stateful service is listening on some random port. Needs some clarification here!

[jeremymeng]

It looks like the partition count is 6 for cloud deployment and the key range is all Int64 https://github.com/Azure-Samples/service-fabric-dotnet-getting-started/blob/e5641cba3a284a84c00937ddcbfb4ac4b01463a9/src/GettingStartedApplication/GettingStartedApplication/ApplicationPackageRoot/ApplicationManifest.xml#L66

Shouldn't the partition number be 26 and the key range from 0 to 25, if the partition scheme is the first capital letter? (edited: partition number can be scaled)

https://github.com/Azure-Samples/service-fabric-dotnet-getting-started/blob/cf8070ea3a1c5931badf7dc55da064be47e5b38d/src/GettingStartedApplication/WebService/Controllers/StatefulBackendServiceController.cs#L141

[darrenprunty]

Hi @snpdev,

Did you ever solve this problem? I'm trying to get an application up and running and the reverse proxy is not working. I'm following the following article...

https://docs.microsoft.com/en-us/azure/service-fabric/service-fabric-quickstart-dotnet

Thanks.

[shawnweisfeld]

Port 19081 is the default reverse proxy port. You need to deploy the sample to a Azure Service Fabric cluster with the reverse proxy feature enabled. More information on the reverse proxy feature of Azure Service Fabric can be found here.

[darrenprunty]

Thanks. I was trying to get it working in my local development environment using the SDK.

I found online that it doesn't work on Windows 7 unfortunately.