March 2024 CU for SharePoint Server Subscription Edition is available for download

6 Comments

1. 

   Andreas
   On 14. March 2024 Permalink

   After Updating the First FronEnd Server (via Install-SPSE_Fix.ps1 ) we get the following Error. There was only a Directory “C:\Windows\Microsoft.NET\assembly\GAC_MSIL\Microsoft.Owin\v4.0_4.2.2.0__31bf3856ad364e35”.
   So we copied the v4.0_3.0.1.0__31bf3856ad364e35 Folder from a different Machine
   and it works fine. The Web.Conf reference the wrong dll. Mayby after SPConf everything Works? But there is no Zero Downtime patching with this Error.

   Exception information:
   Exception type: FileNotFoundException
   Exception message: Could not load file or assembly ‘Microsoft.Owin, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35’ or one of its dependencies. The system cannot find the file specified.
   at Microsoft.Owin.Host.SystemWeb.OwinAppContext.Initialize(Action1 startup)
   at Microsoft.Owin.Host.SystemWeb.OwinBuilder.Build(Action1 startup)
   at Microsoft.Owin.Host.SystemWeb.OwinHttpModule.InitializeBlueprint()
   at System.Threading.LazyInitializer.EnsureInitializedCore[T](T& target, Boolean& initialized, Object& syncLock, Func`1 valueFactory)
   at Microsoft.Owin.Host.SystemWeb.OwinHttpModule.Init(HttpApplication context)
   at System.Web.HttpApplication.RegisterEventSubscriptionsWithIIS(IntPtr appContext, HttpContext context, MethodInfo[] handlers)
   at System.Web.HttpApplication.InitSpecial(HttpApplicationState state, MethodInfo[] handlers, IntPtr appContext, HttpContext context)
   at System.Web.HttpApplicationFactory.GetSpecialApplicationInstance(IntPtr appContext, HttpContext context)
   at System.Web.Hosting.PipelineRuntime.InitializeApplication(IntPtr appContext)

   Reply
   1. 

      Stefan Goßner
      On 15. March 2024 Permalink

      Hi Andreas,
      yes – this has been identified as a known issue in this update. An update for the KB article is currently in the works.
      Solution is to run the SharePoint configuration wizard – it will add the required changes to the web.config.
      Cheers,
      Stefan

      Reply
2. 

   Richard
   On 15. March 2024 Permalink

   Same issue here with CU March

   The workaround I found is to replace the version numbers in following section in the web.config:
   find section in web.config

   Replace

   With

   After doing this, the Web Application and/or Central Admin site is working again.
   And you can bring the server online again and continue with ZDP

   Reply
   1. 

      Stefan Goßner
      On 15. March 2024 Permalink

      Hi Richard,
      yes, thats the workaround we proposed to the product group to support zero-downtime-patching.
      The workaround is currently being evaluated to understand if the upgrader still performs all actions when running psconfig later.
      There is a small chance that the upgrader exits early and does not perform futher required upgrades.
      For now this workaround should not be performed in a production environment till approval has been given by the product group.

      The easiest way to resolve this issue is to run the SharePoint Configuration Wizard after the installation of the fixes.
      It will perform the required changes in the web.config.

      Cheers,
      Stefan

      Reply
   2. 

      Stefan Goßner
      On 19. March 2024 Permalink

      The workaround for zero-downtime-patching for this issue has now been added to the following blog post:
      https://blog.stefan-gossner.com/2024/03/15/trending-issue-could-not-load-file-or-assembly-microsoft-owin-version3-0-1-0-after-installing-march-2024-cu-for-spse/

      Reply
      1. 

         Richard
         On 19. March 2024 Permalink

         Hi Stefan,

         Thanks, good to know we can still patch this CU with ZDP with this workaround.

         Best Regards,
         Richard

         Reply