I have an Azure App Service that contains 1 Web App with 1 slot. I have 2 instances assigned to the App Service. This week, the App Service shows about 60% CPU usage, and its
I recently encounter a similar issue (one bad instance always read null from ConfigurationManager.AppSettings
while the other instance was fine). I found that restarting a particular instance of a Azure App service (web app) is do-able from the Azure portal. :D
Updated Aug 16th, 2019:
The short version is that if you go in the portal for your web app under Diagnose and Solve Problems, search for Advanced Application Restart and you will get an option that allows you to pick just the instance you want.
Hope that helps.