How to add a Warming Up message to your Umbraco site

When building a website, the optimal thing is that the users experience no downtime while a new version of the site is being deployed. This can however be quite complex to achieve in reality, and usually requires that you have multiple web servers.

The next best thing is that your users at least do not just get a browser showing nothing, while the page takes forever to load. While deploying, you could use the app_offline.htm, but that just blocks all requests, and when you remove it, the site still has not booted up.

In this post we will look at

  • How to configure this
  • What are the potential issues
  • What can we do to solve it

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Error page setup in Umbraco

Before deploying your Umbraco website to production, you want to make sure you are not displaying the standard YSOD to users in cases of exceptions.

I wanted to make a setup that achieves the following:

  1. Show a nice error page to the user
  2. Show the page on the url where the exception happens
  3. Return the appropriate 500 status code

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