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Invalid ViewState

Forums > Upgrading DNN Platform
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jamese77

New Around Here



Posts:5
New Around Here




6/22/2021 5:34 PM

    Hello,

    After upgrading from DNN7.3.4 to DNN9.9, I have noticed the following error in the *log.resource file located in \Portals\_default\Logs.

    System.Web.HttpException (0x80004005): Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster.

    See http://go.microsoft.com/fwlink/?LinkID=314055 for more information. ---> System.Web.UI.ViewStateException: Invalid viewstate. 

    The web application is hosted in a web farm and I have verified the web.config has a valid machine key and is the same across all servers.  

    I have refered this article (per the log) http://go.microsoft.com/fwlink/?LinkID=314055, but nothing seemed to help.  

    I was wondering if anyone has come across this? Is this some extra security within DNN.  I am also trying to recreate the issue, but I haven't had any luck.  

    If you anyone has any ideas on this, I would greatly appreciate it.

     






    Sebastian Leupold

    Veteran Member



    Posts:539
    Veteran Member




    6/22/2021 9:24 PM
      if you are running DNN in a web farm, did you enable distributed caching provider in DNN?





      jamese77

      New Around Here



      Posts:5
      New Around Here




      6/23/2021 7:19 AM
        Thank you for the reply.
        I have this is my web.config









        Is there another setting I need to enable? Do I need to enable the key "IsWebFarm"?

        Thank you.





        jamese77

        New Around Here



        Posts:5
        New Around Here




        6/23/2021 7:22 AM





          Sebastian Leupold

          Veteran Member



          Posts:539
          Veteran Member




          6/23/2021 7:24 AM
            did you read https://dnnsupport.dnnsof...-Guide-versions-9-xx ?





            jamese77

            New Around Here



            Posts:5
            New Around Here




            6/23/2021 10:24 AM
              Thank you for the guide. I will take a look at this.
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