Apps crashing with "no healthy upstream" when under load


We are deploying a .net core web application to Apps. Its all working great until we use a image upload feature of the CMS in the web app.

When uploading a couple of images, the entire website goes down, and the error you get is 503 - “no healthy upstream”.

We’ve troubleshoot the app on a VM, and it works without issues, so it only seems to happen when we host on Apps.

Is there some thread limitation on the CPU or anything like that we’re hitting?

We are using the Pro Tier with 1 CPU and 1gb ram. RAM goes to 50% and CPU to 70%, and then it crashes out and reboots.

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Hi there,

I think that it is possible that your container is hitting an out of memory problem. Have you tried running the application with 2GB RAM?

Regards, Bobby