Azure Web App restarts due to environment variable changed caused by MsiInstaller

Davey van Tilburg 0 Reputation points
2024-08-29T06:21:34.5166667+00:00

We started to notice that every 6 hours all our Azure App Service web-apps has increased CPU load even though they do not get more requests. Investigating further we noticed that the activity logs of all these web-apps log an:

Operation name: Update website extension

Event initiated by: Azure Application Change Service

Event in the Activity log of the web app. I believe a change in the environment variables causes this to be logged. This activity log correlates with Application Event Logs found via Diagnostic tools:

User's image

(blacked out information because I could not figure out of the guids were sensitive information or not, so opted for the safer route)

Where the last warning (event id 1015) has the error code: 0x80070005 which I believe states something has insufficient permissions.

Apparently this issue has been occurring in the application log for over a year, but with increased load (apps running on the same app service plan) the start up load is becoming an issue.

I am kind of stuck in my investigation of what is causing this or how to resolve the issue, any help is more than welcome

Azure App Service
Azure App Service
Azure App Service is a service used to create and deploy scalable, mission-critical web apps.
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