title: SignalR Redis backplane not working - dependency issue?
body: <p>We're using SignalR with the Redis (Azure cache) backplane in our redundant Azure web application. We detected a few days ago that all SignalR messages didn't seem to get delivered (it has worked in the past), thus pointing to problem with the backplane.  </p>
  
  <p>The application uses ASP.Net Owin startup as well as Autofac as IoC for the hubs, and we start up SignalR like this:</p>
  
  <pre><code>GlobalHost.DependencyResolver.UseRedis(new RedisScaleoutConfiguration(redisConnectionString, signalrRedisKey));
  var hubConfiguration = new HubConfiguration
  {
      Resolver = new AutofacDependencyResolver(resolver)
  };
  app.UseAutofacMiddleware(resolver);
  app.MapSignalR("/signalr", hubConfiguration);
  </code></pre>
  
  <p>It doesn't matter if I change the Redis backplane configuration string to something invalid, it just won't connect. The SignalR code is located in another assemby than the web host.</p>
  
  <p>I do not get any exceptions in the application iself, but I'm getting the follwing error when tracing SignalR:</p>
  
  <blockquote>
    <p>SignalR.ReflectedHubDescriptorProvider Warning: 0 : Some of the
    classes from assembly "Microsoft.AspNet.SignalR.Owin, Version=1.2.2.0,
    Culture=neutral, PublicKeyToken=31bf3856ad364e35" could Not be loaded
    when searching for Hubs.
    [C:\Windows\Microsoft.NET\Framework64\v4.0.30319\Temporary ASP.NET</p>
    
    <p>Files\root\79fa3057\a44a64e\assembly\dl3\75de3633\cfc73faf_eb21d101\Microsoft.AspNet.SignalR.Owin.dll]</p>
    
    <p>Original exception type: ReflectionTypeLoadException Original
    exception message: Unable to load one or more of the requested types.
    Retrieve the LoaderExceptions property for more information.</p>
  </blockquote>
  
  <p>Is it a dependency problem with nuget?</p>
  
  <p>Here's an relevant excerpt from our packages.config:</p>
  
  <pre><code>&lt;package id="Autofac" version="3.5.2" targetFramework="net46" /&gt;
  &lt;package id="Autofac.Owin" version="3.1.0" targetFramework="net46" /&gt;
  &lt;package id="Autofac.SignalR" version="3.0.2" targetFramework="net46" /&gt;
  &lt;package id="Castle.Core" version="3.3.3" targetFramework="net46" /&gt;
  &lt;package id="Microsoft.AspNet.SignalR.Client" version="2.2.0" targetFramework="net46" /&gt;
  &lt;package id="Microsoft.AspNet.SignalR.Core" version="2.2.0" targetFramework="net46" /&gt;
  &lt;package id="Microsoft.AspNet.SignalR.Redis" version="2.2.0" targetFramework="net46" /&gt;
  &lt;package id="Microsoft.Owin" version="3.0.1" targetFramework="net46" /&gt;
  &lt;package id="Microsoft.Owin.Security" version="3.0.1" targetFramework="net46" /&gt;
  &lt;package id="Newtonsoft.Json" version="8.0.2" targetFramework="net46" /&gt;
  &lt;package id="Owin" version="1.0" targetFramework="net46" /&gt;
  &lt;package id="StackExchange.Redis.StrongName" version="1.0.488" targetFramework="net46" /&gt;
  </code></pre>
  
  <p>Really grateful for your help!</p>