Getting 503 Service unavailable without exceeding quota on Web App.

Question

As seen in the image, my quotas are all at 0, but I'm still getting "503 server unavailable" errors. The 503 error occurs even if there are no changes made to the application, and it's been doing this repeatedly for several days now. I understand that the free tier is free, but it does not give me confidence to upgrade to a paid tier when the free tier seems to randomly go down and I'm unable to understand why.

Answer 1

Hey @jsangco

I believe your error is being caused by something else, not by being on the free tier. If your deployed app is really resource intensive, then scaling up will be your only option.

Use the Troubleshoot HTTP errors of "502 bad gateway" and "503 service unavailable" in Azure App Service guide to help determine what is causing your issue.

Collect data of your application so you can determine when and where the error is occurring. You can also enable Application Insights through auto instrumentation to help aid with this. Once you determine the when/where, then you can include additional logging statements in your application to capture the root cause(s) of the error in question.