title: Requests stuck in RequestAquireState Module Name: Session
body: <p>I have an asp.net 4.0 website which runs in IIS 7.
  Starting a couple of days ago, a lot of requests were stuck in RequestAquireState.</p>
  
  <p>Do you have any idea where I can start look into finding a solution for my problem ?
  In my code ? in IIS ? Have you ever encountered something like this ?</p>
  
  <p><img src="https://i.stack.imgur.com/YoWEQ.png" alt="enter image description here"></p>