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POHubConnection.Start throws error only when called from singleton object
 

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  1. POHubConnection.Start throws error only when called from singleton object
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    <p>I have built a notification system with the following code:</p> <pre><code>class SignalRClient { HubConnection hubconn; IHubProxy proxy; public SignalRClient(string url) { hubconn = new HubConnection(url); proxy = hubconn.CreateProxy("XXX.NotificationHub"); hubconn.Start().Wait(); } public void SendMessage() { proxy.Invoke("LiveNotify", new { Application = "SRWinClient", Server = Environment.MachineName, Message = "This is a test", ImgId= 2 }); } } </code></pre> <p>This works great when i trigger it from a test windows forms app (on a button click), but when i call if from a singleton object that i have it fails on the Start().Wait(). I have copy pasted the code and checked a number of times to make sure there were no typos.</p> <p>Here is my notification singleton. It does more than the SignalR bit. it updates Databases and more, but here is the relevant parts:</p> <pre><code>public class CDSNotifier { private static object mLock = new object(); private static CDSNotifier mnotifier = null; private bool enableSignalRNotifications = false; private SignalRNotifier snotifier; private CDSNotifier() { NameValueCollection appSettings = ConfigurationManager.AppSettings; try { enableSignalRNotifications = Convert.ToBoolean(appSettings["EnableSignalRNotifications"]); } catch { }; if (enableSignalRNotifications) { snotifier = new SignalRNotifier(appSettings["SignalRHubURL"]); } } public static CDSNotifier Instance { get { if (mnotifier == null) { // for thread safety, lock an object when lock (mLock) { if (mnotifier == null) { mnotifier = new CDSNotifier(); } } } return mnotifier; } } public void Notify(int applicationId, int? companyId, string message, NotificationType type, string server) { ..... try { if (enableSignalRNotifications) snotifier.SendMessage(applicationId, message, type); } catch { } } </code></pre> <p>Exception that I am getting:</p> <blockquote> <p>System.AggregateException Message: One or more errors occured StackTrace: at System.Threading.Tasks.Task.ThrowIfExceptional(Boolean includeTaskCanceledExceptions) at System.Threading.Tasks.Task.Wait(Int32 millisecondsTimeout, CancellationToken cancellationToken) at System.Threading.Tasks.Task.Wait()</p> </blockquote>
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    1. USmithun_daa
    1. USmithun_daa
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      1. POHubConnection.Start throws error only when called from singleton object
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      1. VTUpMod
    2. VO
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      1. POHubConnection.Start throws error only when called from singleton object
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      1. POHubConnection.Start throws error only when called from singleton object
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    1. COWhat exception are you getting?
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      1. USM.Babcock
    2. COI have added the Exception to the post.
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      1. POHubConnection.Start throws error only when called from singleton object
      1. USmithun_daa
    3. COInner exception, maybe?
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      1. USM.Babcock
 

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