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Invalid ViewState

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jamese77
New Around Here
Posts: 5
New Around Here
6/22/2021 6:34 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: 546
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6/22/2021 10:24 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 8:19 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 8:22 AM
[code] [/code]
Sebastian Leupold
Veteran Member
Posts: 546
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6/23/2021 8:24 AM
did you read https://dnnsupport.dnnsof...-Guide-versions-9-xx ?
jamese77
New Around Here
Posts: 5
New Around Here
6/23/2021 11:24 AM
Thank you for the guide. I will take a look at this.

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