Is IIS 7.5 required for ASP.NET MVC 5.1, ASP.NET Web API 2.1?

5
votes

After upgrading the project to WebApi 2.1 and MVC 5.1 getting following errors on IIS7:

This operation requires IIS version 7.5 or higher running in integrated pipeline mode.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.PlatformNotSupportedException: This operation requires IIS version 7.5 or higher running in integrated pipeline mode.

Source Error: An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace: [PlatformNotSupportedException: This operation requires IIS version 7.5 or higher running in integrated pipeline mode.] System.Web.HttpResponse.get_ClientDisconnectedToken() +3127102
System.Web.HttpResponseWrapper.get_ClientDisconnectedToken() +9
System.Web.Http.WebHost.HttpResponseBaseExtensions.GetClientDisconnectedTokenWhenFixed(HttpResponseBase response) +58
System.Web.Http.WebHost.d__0.MoveNext() +134 System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) +93
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +52 System.Web.TaskAsyncHelper.EndTask(IAsyncResult ar) +60
System.Web.HttpTaskAsyncHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result) +6
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +9514812 System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +155

______________________ Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.18408

2
asp.net-mvciisiis-7asp.net-web-apiiis-7.5
Short answer, Yes. Long answer, Yes. Feel free to modify your question in order to obtain a more detailed answer. – Mike Marks
Did you see such requirement documented somewhere? I couldn't find such requirements anywhere. And we were already using WebApi 2, which worked fine on IIS7 – Alexander Puchkov
you were using WebAPI2, not 2.1, under IIS 7, right? – Mike Marks
From what I understand and from what I've been told by the Microsoft rep here at my company, IIS 7.5 is required for WebAPI version 2.1. – Mike Marks
Correct WebAPI2 worked well on II7 before upgrade to WebAPI2.1 – Alexander Puchkov

2 Answers

7
votes

This was a regression from Web API 2 to 2.1. Following bug is keeping tracking of this:

https://aspnetwebstack.codeplex.com/workitem/1645

NOTE: The fix has been released today (2/10/2014). Make sure to update your packages.

5
votes

We had this issue and resolved by following settings in VS 2012

Right Click Web Role-> Properties - > Web -> Servers -> Select Use Local IIS Web Server.