App Service "GET /" Causing 404 Error Every ~13 Seconds

Timothy Boudreau 0 Reputation points
2024-06-18T18:54:28.08+00:00

Hello,

I have an Express API hosted via App Service, which has worked great so far, but after enabling Automatic option for the Scale out method (Web App>Settings>Scale Out) I've noticed a few pings occurring on different endpoint, for example, GET /admin/host/ping & GET /. These two GET requests were pinging my API every 13 seconds and, while not an impact to performance, is causing my logs and Application Insights to bloat with 404 errors.

I was able to resolve GET /admin/host/ping by following the solution here: https://learn.microsoft.com/en-us/answers/questions/1457153/seeing-a-lot-of-404s-to-admin-host-ping-after-turn. As for GET /, I have been unable to find a solution to this annoyance.

More information about my App Service:

Configuration:

  • Stack: Node
  • Major Version: Node 20
  • Minor Version: Node 20 LTS
  • ...
  • Always on: Off
  • ...

Solutions tried so far:

  • Application Insights>Investigate>Availability, I have added a Classic Test to a valid endpoint which is currently working. (This is the method used in the link above to resolve the GET /admin/host/ping requests.)
  • Enabled Health Check and setup the Health Probe Path to a valid endpoint.

While this is not a critical issue, it is causing my logs and Application Insights to become cluttered with 70k+ 404 errors (as of writing). So, if anyone has experience with this or something similar I would appreciate your assistance.

Thank you!

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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