title: Azure SignalR and Azure Web Application with multiple instances
body: <p>We are developing ASP.Net core that is hosted as Azure Web Application.</p>
  
  <p>We also use Azure SignalR service</p>
  
  <p>Everything works great as long as we have single instance of the Web App, but once we scale it out we have the following problem:</p>
  
  <ol>
  <li>From the Controller's action we resolve IHubContext and we send message to Hub's client. Everything works great so far</li>
  <li>Hub's client accepts response and sends it TheHub endpoint. </li>
  </ol>
  
  <p>The problem here is that response could be sent to another instance of Web App. So we send request from instance #1 but response is sent to instance #2 with 50% chance and instance #1 never receives response</p>
  
  <p>Any ideas of how we could make it work so instance that emitted request actually received response?</p>