Monitoring triggers in web.config not working for .net core web app

Question

I'm trying to implement a setting (see below) in a web.config file in a .NET Core web app. Web app is hosted in Azure. The setting is placed in system.webServer section and should restart the worker process on slow responses according to article: https://azure.microsoft.com/sv-se/blog/auto-healing-windows-azure-web-sites/

<monitoring>
 <triggers>
  <slowRequests timeTaken="00:01:00" count="10" timeInterVal="00:02:00" />
 </triggers>
</monitoring>

But when publishing the config file with this setting the web app crashes with error messages:

HTTP Error 500.19 - Internal Server Error

The worker process is unable to read the applicationhost.config or web.config file.
The requested page cannot be accessed because the related configuration data for the page is invalid.

Anyone successfully implemented this setting in a .net core app hosted in Azure?

AsusT9 AsusT9 · Accepted Answer · 2019-04-17T11:00:46

I found that one setting was missing. The complete monitoring tag should be:

  <monitoring>
    <triggers>
      <slowRequests timeTaken="00:01:00" count="10" timeInterval="00:02:00" />
    </triggers>
    <actions value="Recycle" />
  </monitoring>

Monitoring triggers in web.config not working for .net core web app

1 Answers