title: The request queue limit of the session is exceeded
body: <p>I have this error in ASP.NET application , NET 4.7.1.</p>
  
  <p>The request queue limit of the session is exceeded.</p>
  
  <p>Full:</p>
  
  <pre><code>System.Web.HttpException (0x80004005): The request queue limit of the session is exceeded.
  at System.Web.SessionState.SessionStateModule.QueueRef()
  at System.Web.SessionState.SessionStateModule.PollLockedSession()
  at System.Web.SessionState.SessionStateModule.GetSessionStateItem()
  at System.Web.SessionState.SessionStateModule.BeginAcquireState(Object source, EventArgs e, AsyncCallback cb, Object extraData)
  </code></pre>
  
  <p>any suggestions ?</p>