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    <p><code>$.connection.hub.error</code> is used to handle hub connection failures. You can use jQuery's deferred.fail() to handle an exception thrown from a particular hub invocation (<code>$.connection.hub.methodThatThrows().fail(function() { ... }</code>), but this obviously doesn't handle exceptions thrown from <em>any</em> invocation.</p> <p>SignalR v1.0.0 will add support for <code>IHubPipelineModules</code>. Then you will be able to override <code>HubPipelineModule.BuildIncoming</code> or <code>HubPipelineModule.OnIncomingError</code> which can then be added to the <code>HubPipeline</code> via <code>GlobalHost.HubPipeline.AddModule(myHubPipelineModule)</code>.</p> <p><a href="https://github.com/SignalR/SignalR/issues/548">https://github.com/SignalR/SignalR/issues/548</a></p> <p><a href="https://github.com/SignalR/SignalR/commit/83fdbfd9baa1f1cc3399d7f210cb062597c8084c">https://github.com/SignalR/SignalR/commit/83fdbfd9baa1f1cc3399d7f210cb062597c8084c</a></p> <p>Example implementation:</p> <pre><code>using Microsoft.AspNet.SignalR.Hubs; public class MyHubPipelineModule : HubPipelineModule { protected override void OnIncomingError(ExceptionContext exceptionContext, IHubIncomingInvokerContext invokerContext) { dynamic caller = invokerContext.Hub.Clients.Caller; caller.ExceptionHandler(exceptionContext.Error.Message); } } protected void Application_Start() { GlobalHost.HubPipeline.AddModule(new MyHubPipelineModule()); } // JS // hub.client is also introduced in SignalR v1.0.0 $.connection.myHub.client.exceptionHandler = function (message) { alert(message); }; </code></pre>
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    1. COInteresting and informative answer. I would've thought there would be support to not have to hook my logging method at the call site (and for every hub callback). Kind of ugly but I'll put up with it as long as that's the only way. Thanks a lot for the information
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    2. COShouldn't it be context.Hub.Clients.Caller.ExceptionHandler(ex.Message);
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    3. CO@RaghavKhunger you're right. Fixed.
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