Parse Crash on NameResolutionFailure

[habermeier]

I got the below crash report from my app -- from a tester in India.

Unclear to me where it's coming from. The only Parse Code calls I'm making from iOS is as follows:

        public AppDelegate()
        {
            var info = ParseHelper.GetInfo(App.ReleaseType);
            ParseClient.Initialize(info.AppId, info.NetKey);
        }
...
        public override void RegisteredForRemoteNotifications(UIApplication application, NSData deviceToken) 
        {

            Console.WriteLine("RegisteredForRemoteNotifications");
            ParseInstallation installation = ParseInstallation.CurrentInstallation;
            installation.SetDeviceTokenFromData(deviceToken);
            installation.SaveAsync().ContinueWith(t => {
                if (t.IsFaulted) {
                    Console.WriteLine("Push SaveAsync Exception: {0}", t.Exception);
                }
            });

        }
...

        public override void ReceivedRemoteNotification(
            UIApplication application,
            NSDictionary userInfo
        ) {
            // We need this to fire userInfo into ParsePushNotificationReceived.
            ParsePush.HandlePush(userInfo);
        }

        void HandleParsePushNotificationReceived(object sender, ParsePushNotificationEventArgs args)
        {
            Console.WriteLine("Got a Push Notification!");
        }

...

        public override bool FinishedLaunching(UIApplication application, NSDictionary launchOptions)
        {
          ...
          ParsePush.ParsePushNotificationReceived += HandleParsePushNotificationReceived;
          ...
        }

The exception I get is as follows...

*** Terminating app due to uncaught exception 'System.AggregateException: A Task's exception(s) were not observed either by Waiting on the Task or accessing its Exception property. As a result, the unobserved exception was rethrown by the finalizer thread.', reason: 'System.AggregateException: A Task's exception(s) were not observed either by Waiting on the Task or accessing its Exception property. As a result, the unobserved exception was rethrown by the finalizer thread. ---> System.Net.WebException: Error: NameResolutionFailure
  at System.Net.HttpWebRequest.EndGetRequestStream (IAsyncResult asyncResult) [0x00045] in /Users/builder/data/lanes/2320/1f068b49/source/maccore/_build/Library/Frameworks/Xamarin.iOS.framework/Versions/git/src/mono/mcs/class/System/System.Net/HttpWebRequest.cs:829 
  at System.Threading.Tasks.TaskFactory`1[System.IO.Stream].FromAsyncCoreLogic (IAsyncResult iar, System.Func`2 endFunction, System.Action`1 endAction, System.Threading.Tasks.Task`1 promise, Boolean requiresSynchronization) [0x00000] in <filename unknown>:0 
--- End of stack trace from previous location where exception was thrown ---
  at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000b] in /Users/builder/data/lanes/2320/1f068b49/source/maccore/_build/Library/Frameworks/Xamarin.iOS.framework/Versions/git/src/mono/mcs/class/corlib/System.Runtime.ExceptionServices/ExceptionDispatchInfo.cs:61 
  at Parse.Internal.InternalExtensions+<OnSuccess>c__AnonStorey2`1[System.Threading.Tasks.Task].<>m__0 (System.Threading.Tasks.Task t) [0x0003c] in <filename unknown>:0 
  at System.Threading.Tasks.ContinuationResultTaskFromTask`1[System.Threading.Tasks.Task`1[System.Threading.Tasks.Task]].InnerInvoke () [0x00000] in <filename unknown>:0 
  at System.Threading.Tasks.Task.Execute () [0x00016] in /Users/builder/data/lanes/2320/1f068b49/source/maccore/_build/Library/Frameworks/Xamarin.iOS.framework/Versions/git/src/mono/external/referencesource/mscorlib/system/threading/Tasks/Task.cs:2523 
  --- End of inner exception stack trace ---
---> (Inner Exception #0) System.Net.WebException: Error: NameResolutionFailure
  at System.Net.HttpWebRequest.EndGetRequestStream (IAsyncResult asyncResult) [0x00045] in /Users/builder/data/lanes/2320/1f068b49/source/maccore/_build/Library/Frameworks/Xamarin.iOS.framework/Versions/git/src/mono/mcs/class/System/System.Net/HttpWebRequest.cs:829 
  at System.Threading.Tasks.TaskFactory`1[System.IO.Stream].FromAsyncCoreLogic (IAsyncResult iar, System.Func`2 endFunction, System.Action`1 endAction, System.Threading.Tasks.Task`1 promise, Boolean requiresSynchronization) [0x00000] in <filename unknown>:0 
--- End of stack trace from previous location where exception was thrown ---
  at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000b] in /Users/builder/data/lanes/2320/1f068b49/source/maccore/_build/Library/Frameworks/Xamarin.iOS.framework/Versions/git/src/mono/mcs/class/corlib/System.Runtime.ExceptionServices/ExceptionDispatchInfo.cs:61 
  at Parse.Internal.InternalExtensions+<OnSuccess>c__AnonStorey2`1[System.Threading.Tasks.Task].<>m__0 (System.Threading.Tasks.Task t) [0x0003c] in <filename unknown>:0 
  at System.Threading.Tasks.ContinuationResultTaskFromTask`1[System.Threading.Tasks.Task`1[System.Threading.Tasks.Task]].InnerInvoke () [0x00000] in <filename unknown>:0 
  at System.Threading.Tasks.Task.Execute () [0x00016] in /Users/builder/data/lanes/2320/1f068b49/source/maccore/_build/Library/Frameworks/Xamarin.iOS.framework/Versions/git/src/mono/external/referencesource/mscorlib/system/threading/Tasks/Task.cs:2523 <---

[richardjrossiii]

Sounds like a DNS configuration issue more than anything else. AFAIK, 'parse.com' is not blocked in India. I'll see why this exception isn't being 'bubbled' back up to the 'SaveAsync' task, though.