Requests hanging on Session module on IIS 7.5

Question

From time to time, some requests on my website starts to hang on the RequestAcquireState state of the Session module. When that spiral begins all requests timeout and we nee

Answer 1

The answer is Hotfix Rollup 2828841 for .NET Framework 4.5 , here all the explanation:

http://forums.asp.net/t/1888889.aspx/2/10?Question+regarding+a+possible+bug+within+NET+4+5

and here the download link

It works for me on IIS 7.5 Windows Server 2008 rs x64 , asp.net web forms application with lot of ajax request.