Hi, I have a PCL 4.5 - Profile 7 Xamarin.Forms project that uses the Microsoft.AspNet.SignalR.Client NuGet package (in the shared DLL project, not the device-specific projects). It doesn't do anything special, simply sends data back and forth. All the SignalR connection, response, etc. code is in the shared DLL (as is 99% of the code in general for this project). For the device-specific projects, I'm targeting Android and iOS Unified. I connect to the SignalR server in the MainActivity.OnStart method in the Android project, and in the AppDelegate.OnActivated method in the iOS project. Until the other day, I never had any problems. This app and the server were working fine for several months.
Then, iOS 9 came out, and I had to update to Xamarin.Forms 1.5, and update Xamarin.iOS, Xamarin.Droid, Mono, etc. to the latest versions. Now, my app still runs fine, but SignalR never connects. In the app (both the iOS and Android apps since building with the new framework/Forms versions) the connection always times out after my set timeout limit (30 seconds). It never connects. On Android it gives me a "500: Internal Server Error" message as well, IF I choose to "Link All" in my Droid project settings. Otherwise, it just times out (the iOS project just times out regardless of linker settings). In both cases, when debugging, the timeout occurs right at the "await connection.Start()" line in my code, which is located in a class in the main shared DLL--aka the core project, which has the reference to the SignalR NuGet package. As I noted before, the device-specific projects each call into this code in their startup methods to start the server connection.
I've tried to debug into the SignalR code by unchecking the relevant item in the Debug options menu of Xamarin Studio (to allow me to debug in framework code), but Xamarin Studio doesn't seem to be able to move into it. I've tried some other diagnostics, but can't seem to figure out what's happening. I've also deployed it on my device, and it still doesn't connect. I've completely ruled out any server/network issues, as another test application I have on the same network, utilizing the same NuGet library, does work (although it doesn't use Xamarin, and is built completely differently). Does anyone know how to fix this?
Here's the exception I get when I'm debugging, after the connection times out:
System.Net.WebException: Error: ConnectFailure (Connection timed out) ---> System.Exception: Connection timed out
at System.Net.Sockets.Socket.Connect (System.Net.EndPoint remoteEP) [0x000f1] in /Users/builder/data/lanes/2077/1d27ac2c/source/maccore/_build/Library/Frameworks/Xamarin.iOS.framework/Versions/git/src/mono/mcs/class/System/System.Net.Sockets/Socket_2_1.cs:1251
at System.Net.WebConnection.Connect (System.Net.HttpWebRequest request) [0x001c2] in /Users/builder/data/lanes/2077/1d27ac2c/source/maccore/_build/Library/Frameworks/Xamarin.iOS.framework/Versions/git/src/mono/mcs/class/System/System.Net/WebConnection.cs:213
--- End of inner exception stack trace ---
at System.Net.HttpWebRequest.EndGetResponse (IAsyncResult asyncResult) [0x0005e] in /Users/builder/data/lanes/2077/1d27ac2c/source/maccore/_build/Library/Frameworks/Xamarin.iOS.framework/Versions/git/src/mono/mcs/class/System/System.Net/HttpWebRequest.cs:944
at System.Threading.Tasks.TaskFactory^1[System.Net.WebResponse].FromAsyncCoreLogic (IAsyncResult iar, System.Func^2 endFunction, System.Action^1 endAction, System.Threading.Tasks.Task^1 promise, Boolean requiresSynchronization) [0x00014] in /Users/builder/data/lanes/2077/1d27ac2c/source/maccore/_build/Library/Frameworks/Xamarin.iOS.framework/Versions/git/src/mono/external/referencesource/mscorlib/system/threading/Tasks/FutureFactory.cs:552
at --- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000b] in /Users/builder/data/lanes/2077/1d27ac2c/source/maccore/_build/Library/Frameworks/Xamarin.iOS.framework/Versions/git/src/mono/mcs/class/corlib/System.Runtime.ExceptionServices/ExceptionDispatchInfo.cs:61
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) [0x00047] in /Users/builder/data/lanes/2077/1d27ac2c/source/maccore/_build/Library/Frameworks/Xamarin.iOS.framework/Versions/git/src/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:201
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) [0x0002e] in /Users/builder/data/lanes/2077/1d27ac2c/source/maccore/_build/Library/Frameworks/Xamarin.iOS.framework/Versions/git/src/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:170
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) [0x0000b] in /Users/builder/data/lanes/2077/1d27ac2c/source/maccore/_build/Library/Frameworks/Xamarin.iOS.framework/Versions/git/src/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:142
at System.Runtime.CompilerServices.ConfiguredTaskAwaitable^1+ConfiguredTaskAwaiter[System.Net.WebResponse].GetResult () [0x00000] in /Users/builder/data/lanes/2077/1d27ac2c/source/maccore/_build/Library/Frameworks/Xamarin.iOS.framework/Versions/git/src/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:580
at System.Net.Http.HttpClientHandler+<SendAsync>c__async0.MoveNext () [0x003d6] in /Library/Frameworks/Xamarin.iOS.framework/Versions/9.0.1.29/src/mono/mcs/class/System.Net.Http/System.Net.Http/HttpClientHandler.cs:354
at --- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000b] in /Users/builder/data/lanes/2077/1d27ac2c/source/maccore/_build/Library/Frameworks/Xamarin.iOS.framework/Versions/git/src/mono/mcs/class/corlib/System.Runtime.ExceptionServices/ExceptionDispatchInfo.cs:61
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) [0x00047] in /Users/builder/data/lanes/2077/1d27ac2c/source/maccore/_build/Library/Frameworks/Xamarin.iOS.framework/Versions/git/src/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:201
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) [0x0002e] in /Users/builder/data/lanes/2077/1d27ac2c/source/maccore/_build/Library/Frameworks/Xamarin.iOS.framework/Versions/git/src/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:170
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) [0x0000b] in /Users/builder/data/lanes/2077/1d27ac2c/source/maccore/_build/Library/Frameworks/Xamarin.iOS.framework/Versions/git/src/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:142
at System.Runtime.CompilerServices.ConfiguredTaskAwaitable^1+ConfiguredTaskAwaiter[System.Net.Http.HttpResponseMessage].GetResult () [0x00000] in /Users/builder/data/lanes/2077/1d27ac2c/source/maccore/_build/Library/Frameworks/Xamarin.iOS.framework/Versions/git/src/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:580
at System.Net.Http.HttpClient+<SendAsyncWorker>c__async0.MoveNext () [0x000a9] in /Library/Frameworks/Xamarin.iOS.framework/Versions/9.0.1.29/src/mono/mcs/class/System.Net.Http/System.Net.Http/HttpClient.cs:274
at --- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000b] in /Users/builder/data/lanes/2077/1d27ac2c/source/maccore/_build/Library/Frameworks/Xamarin.iOS.framework/Versions/git/src/mono/mcs/class/corlib/System.Runtime.ExceptionServices/ExceptionDispatchInfo.cs:61
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) [0x00047] in /Users/builder/data/lanes/2077/1d27ac2c/source/maccore/_build/Library/Frameworks/Xamarin.iOS.framework/Versions/git/src/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:201
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) [0x0002e] in /Users/builder/data/lanes/2077/1d27ac2c/source/maccore/_build/Library/Frameworks/Xamarin.iOS.framework/Versions/git/src/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:170
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) [0x0000b] in /Users/builder/data/lanes/2077/1d27ac2c/source/maccore/_build/Library/Frameworks/Xamarin.iOS.framework/Versions/git/src/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:142
at System.Runtime.CompilerServices.TaskAwaiter.GetResult () [0x00000] in /Users/builder/data/lanes/2077/1d27ac2c/source/maccore/_build/Library/Frameworks/Xamarin.iOS.framework/Versions/git/src/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:124
at MyDataFeed.Services.SignalRClient+<Connect>c__async0.MoveNext () [0x00049] in /Users/brh/MobileApp/MyDataFeed/MyDataFeed/Services/SignalRClient.cs:269
at --- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000b] in /Users/builder/data/lanes/2077/1d27ac2c/source/maccore/_build/Library/Frameworks/Xamarin.iOS.framework/Versions/git/src/mono/mcs/class/corlib/System.Runtime.ExceptionServices/ExceptionDispatchInfo.cs:61
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) [0x00047] in /Users/builder/data/lanes/2077/1d27ac2c/source/maccore/_build/Library/Frameworks/Xamarin.iOS.framework/Versions/git/src/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:201
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) [0x0002e] in /Users/builder/data/lanes/2077/1d27ac2c/source/maccore/_build/Library/Frameworks/Xamarin.iOS.framework/Versions/git/src/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:170
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) [0x0000b] in /Users/builder/data/lanes/2077/1d27ac2c/source/maccore/_build/Library/Frameworks/Xamarin.iOS.framework/Versions/git/src/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:142
at System.Runtime.CompilerServices.TaskAwaiter.GetResult () [0x00000] in /Users/builder/data/lanes/2077/1d27ac2c/source/maccore/_build/Library/Frameworks/Xamarin.iOS.framework/Versions/git/src/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:124
at MyDataFeed.iOS.AppDelegate+<OnActivated>c__async0.MoveNext () [0x00032] in /Users/brh/MobileApp/MyDataFeed/iOS/AppDelegate.cs:33
at --- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000b] in /Users/builder/data/lanes/2077/1d27ac2c/source/maccore/_build/Library/Frameworks/Xamarin.iOS.framework/Versions/git/src/mono/mcs/class/corlib/System.Runtime.ExceptionServices/ExceptionDispatchInfo.cs:61
at System.Runtime.CompilerServices.AsyncMethodBuilderCore.<ThrowAsync>m__0 (System.Object state) [0x00000] in /Users/builder/data/lanes/2077/1d27ac2c/source/maccore/_build/Library/Frameworks/Xamarin.iOS.framework/Versions/git/src/mono/external/referencesource/mscorlib/system/runtime/compilerservices/AsyncMethodBuilder.cs:1006
at UIKit.UIKitSynchronizationContext+<Post>c__AnonStorey0.<>m__0 () [0x00000] in /Users/builder/data/lanes/2077/1d27ac2c/source/maccore/src/UIKit/UIKitSynchronizationContext.cs:24
at Foundation.NSAsyncActionDispatcher.Apply () [0x00000] in /Users/builder/data/lanes/2077/1d27ac2c/source/maccore/src/Foundation/NSAction.cs:163
at at (wrapper managed-to-native) UIKit.UIApplication:UIApplicationMain (int,string[],intptr,intptr)
at UIKit.UIApplication.Main (System.String[] args, IntPtr principal, IntPtr delegate) [0x00005] in /Users/builder/data/lanes/2077/1d27ac2c/source/maccore/src/UIKit/UIApplication.cs:74
at UIKit.UIApplication.Main (System.String[] args, System.String principalClassName, System.String delegateClassName) [0x00038] in /Users/builder/data/lanes/2077/1d27ac2c/source/maccore/src/UIKit/UIApplication.cs:58
at MyDataFeed.iOS.Application.Main (System.String[] args) [0x00008] in /Users/brh/MobileApp/MyDataFeed/iOS/Main.cs:18Note: the backticks (the ` character) in the log have been replaced by carats (the ^ character) because the backticks break the code formatting on this forum