Azure web app is 503 Service Unavailable. How do I get it back running?

Question

Our website has been hosted on Azure for a few years. Tonight it is throwing 503 Service unavailable errors. I cannot even load a url to a .jpg file. I have restarted the app and still nothing loads from the website. I cannot buy Azure support because I have bought and cancelled Azure support in the past. We are a 3 person business and depend on our small website and it is down and I don't know what to do. None of the trace logs make any sense to me.

Answer 1

I think 503 could mean that you reached a quota and Azure now respond with a 503 for requests. So I would check the Quotas section within your App Service Plan. Also check: Troubleshoot HTTP errors of "502 bad gateway" and "503 service unavailable" in Azure App Service

Answer 2

There are several things you can do to help remedy the situation.

• Restart the application (please indicate what it is that will help us)

• Restart the instance that the application is running on.

• Restore from a previous working backup of the site.

You should also add more information to your post so we can help, like what application you are using e.g. Apache, Nginx ect.

Answer 3

I've also had a similar problem. I had two deployment slots and in the first slot (production) which I had the latest code and in the second slot, I've missed deploying the latest code and configured traffic as 60-40 which gave me hard time finding it.

Once I've set 100% to the production slot it started working.

Just thought to share this in case it could be useful if you come across the same stuff in the future.