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Forums Using DNN Platform Administration and Configuration

Page Permission Caching issue

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Jasbir Maan
New Around Here
Posts: 21
New Around Here
8/28/2024 6:37 AM

    We are experiencing an unusual problem in our production environment where changes(page permissions) made on one server are not being reflected on another server for a period of 15-20 hours. It is possible that the changes are only taking effect after the application pool is restarted or some other action is taken.

    I am wondering if there might be a configuration setting which can solve this, restart application solves it but we can not do it after every changes.

    Thanks

    1
    Daniel Valadas
    Advanced Member
    Posts: 232
    Advanced Member
    8/28/2024 10:52 AM
      Is this Evoq or Platform, what caching provider is used in Servers -> Performance ?
      1
      Jasbir Maan
      New Around Here
      Posts: 21
      New Around Here
      8/28/2024 12:18 PM

        This is Platform, and i have tried multiple combination from Server->Performance from but no luck, please fine below recent one

        1
        Daniel Valadas
        Advanced Member
        Posts: 232
        Advanced Member
        8/28/2024 6:32 PM
          Ok cool, that looks like what I would use, however I don't do multi-server so hoping someone else can help :)
          3
          johnhenley
          Growing Member
          Posts: 92
          Growing Member
          8/29/2024 8:27 AM
            By no means an expert, but here are some things to consider:
            1. Is IIS configuration same on each server ? Like making sure worker process in application pool set to 1
            2. Is only issue with page permissions ? Are other “farm” features working correctly?
            3. Have you tried changing cache provider to “web request cache provider”?
            4. File change notifier. Is it set up on each server?
            5. Cache synchronization handler. Is it configured in web(dot)config? Do you see calls to it in iis logs? With success/error 200?
            2
            RichardHowells
            Growing Member
            Posts: 49
            Growing Member
            8/29/2024 10:52 AM
              AIUI multiple servers - aka a web farm - is not a supported configuration for platform.

              So there are no promises for cross server synchronization.
              Daniel Valadas
              Advanced Member
              Posts: 232
              Advanced Member
              8/29/2024 12:31 PM
                I have seen it work but it is a complex setup, you need file replication of some sort, a load balancer and a caching provider than can invalidate cache everywhere. The purpose of the SimpleWebFarmCachingProvider is exactly to make those scenarios work on Platform. Corp used to have some documentation if you try to google (Dnn wefarm setup), I don't know hom maintained that documentation is, but I remember it used to explain how to setup for caching, scheduling, etc.
                3
                Jasbir Maan
                New Around Here
                Posts: 21
                New Around Here
                8/30/2024 3:31 AM

                  Thanks @johnhenley 

                  1. Is IIS configuration same on each server ? Like making sure worker process in application pool set to 1
                  JAS> yes its same for all servers.
                  2. Is only issue with page permissions ? Are other “farm” features working correctly?
                  JAS> Mostly related to page management e.g. add/udpate, permissions etc.
                  3. Have you tried changing cache provider to “web request cache provider”?
                  JAS>Yes, i have tried that too.
                  4. File change notifier. Is it set up on each server?
                  JAS>We have one shared file server for all web server.
                  5. Cache synchronization handler. Is it configured in web(dot)config? Do you see calls to it in iis logs? With success/error 200?
                  JAS>Yes, that's configured. i dont see any info in admin logs, need to check IIS logs.

                  2
                  Jasbir Maan
                  New Around Here
                  Posts: 21
                  New Around Here
                  8/30/2024 3:33 AM

                    Thanks Daniel Valadas 

                    SimpleWebFarmCachingProvider might do the trick, for now i have same URL for all the servers, may be that's where i am missing. Let me try to add different URL for each server so they can call separately.

                    2
                    Will Strohl
                    Senior Member
                    Posts: 1425
                    Senior Member
                    8/30/2024 12:32 PM
                      I would just add on that if you aren't already upgraded o the most current version of DNN, you should upgrade DNN first. 😉
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