Errors after enabling the SwitchMasterToWeb.config file

When enabling the SwitchMasterToWeb.config file for configuring the distributed Sitecore environment, you may face several issues:

• Exceptions similar to the following might be found in the log files or appear when working with the Sitecore Client:
  

  Exception: System.InvalidOperationException
  Message: Could not find configuration node: contentSearch/indexConfigurations/indexUpdateStrategies/syncMaster
  Source: Sitecore.Kernel
     at Sitecore.Diagnostics.Assert.IsTrue(Boolean condition, String message)
     at Sitecore.Configuration.Factory.GetConfigNode(String xpath, Boolean assert)
     ...
     at Sitecore.ContentSearch.ContentSearchManager.get_SearchConfiguration()
     at Sitecore.ContentSearch.ContentSearchManager.GetIndex(String name)
     at Sitecore.ListManagement.ContentSearch.Pipelines.GetAllLists.GetAllContactLists..ctor()

  ERROR [Experience Analytics]: System.InvalidCastException: Invalid cast from 'System.String' to 'Sitecore.Analytics.Reporting.Filters.IDataSourceFilterFactory'.
     at System.Convert.DefaultToType(IConvertible value, Type targetType, IFormatProvider provider)
     at System.Convert.ChangeType(Object value, Type conversionType, IFormatProvider provider)
     ...
     at Sitecore.Configuration.Factory.CreateObject[T](XmlNode configNode)
     at Sitecore.ExperienceAnalytics.Api.ReportingService.RunQuery(ReportQuery reportQuery)
     at Sitecore.ExperienceAnalytics.Api.Http.AnalyticsDataController.Get(ReportQuery reportQuery)

  Exception: System.InvalidOperationException
  Message: Post condition failed
  Source: Sitecore.Kernel
     at Sitecore.Diagnostics.Assert.ResultNotNull[T](T result, String message)
     at Sitecore.Web.UI.HtmlControls.Data.DataViewFactory.GetDataViewByName(String name)
     at Sitecore.Web.UI.HtmlControls.Data.DataViewFactory.GetDataView(String name, String parameters)
     ...
     at Sitecore.Shell.Applications.ContentManager.ContentEditorForm.OnLoad(EventArgs e)

• The search indexes that should be disabled after applying the aforementioned config file, may still be present in the output of the /sitecore/admin/showconfig.aspx page:
  • sitecore_testing_index
  • sitecore_fxm_master_index
  • sitecore_list_index, etc.

The issue may occur when some config files in the /App_Config/Include folder are applied after the SwitchMasterToWeb.config file and revert the configuration changes made by the SwitchMasterToWeb.config file.

To learn more about how Sitecore uses include config files, refer to the Include File Patching Facilities document.