CODEWITHSUNDEEP
c#asp.netiisasynchronousfreeze
Elad
Elad

Reputation: 163

ASP.NET over IIS only handles 1 async request at a time

I have an ASP.NET 4.5 Web API Application over IIS 8.5.

The server is an AWS EC2.

I have an ActionFilter that logs incoming request URL. So essentially it logs the first time the request "enters" my application.

I am issuing 2 request simultaneously (using Postman) and I see that my ActionFilter is not invoked my 1st request finishes.

Those request involve an async-await pattern over a DB query.

I did it twice:

I am using the IIS "out-of-the-box" settings.

  1. How can I approach this issue?
  2. Which IIS configuration settings should I check?
  3. Correct me if I'm wrong, but the async-await is not relevant, because the ThreadPool threads should be able to handle multiple synchronous calls, right?

Thanks!

Upvotes: 0

Views: 477

Answers (1)

Elad
Elad

Reputation: 163

Problem was that Postman/Chrome is sequencing the requests to the same domain. So it's client side limitation only.

Issuing request from multiple machines caused the IIS to respond in parallel.

Thanks everyone!

Upvotes: 1

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