Very handy tip for anyone doing ASP.NET MVC using AsyncController and experiencing timeouts

C# Disciples

Today I stumbled upon a timeout issue while building a web application and felt like I need to share this for those that like me wasted/are wasting hours trying to figure out why you are getting a timeout.

Here is a diagram that show the structure of the request response stack I have.

image

The reason why I went for an AsyncController is that the long running operation is not CPU-bound processing thus the thread that would be waiting for the response would be wasting its time waiting. More info on why and how to use Async Controllers in MVC3 can be found here.

All is fine and good until my I hit a request that took more than 1 minute, and then the nightmare of timeouts begun… So first thing I did is make sure I make the timeout for the WCF service longer. You can do this by…

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