I'm experiencing a frustrating runtime failure with my Azure Functions that I hope to get insights on. It happened suddenly without any changes made to the code or configuration. Here's the context: I'm using Azure Functions on a Linux Consumption Plan with Python. The app had been running reliably for a long time, and there were no deployments, configuration changes, or scaling activities when the issue occurred.
Suddenly, all functions stopped executing, and diagnostics revealed:
- Process reporting unhealthy
- No script host available
- Unhealthy lifecycle
- Readiness probe failed
- Zero worker instances available
The app remained in this unhealthy state for over 9 hours until I performed a manual restart. To rule out my code as the culprit, I tried redeploying the same code into a brand-new Function App on the same plan, and while it worked fine on the first day, the same problem returned on the next day.
I'm concerned this might be linked to stability issues with the Linux Consumption Plan or signs of de-prioritization as Microsoft transitions to newer plans. Has anyone else encountered similar issues?
4 Answers
This scenario sounds like it could benefit from getting in touch with Azure support. They might be able to help you pinpoint the exact issue, especially since it’s persistent without alterations from your side.
Just out of curiosity, are you by any chance in the East US region? I've heard of some problems there recently.
We faced a similar issue recently. When we contacted Azure support, they suggested looking into certificate revocation as a potential cause.
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