'Azure functions - Functions host is not running
I keep getting an error 503 on my health checks for my azure functions, it says error 503. Functions host is not running. It's very inconsistent and only happens once every few days, I'm on the consumption plan but looking at whether a premium plan would fix the issue.
Solution 1:[1]
According to this thread, one possible cause of 503 service-unavailable responses is when the service consumes more memory than what is available under the consumption (serverless) plan, causing the service to be evicted. Switching to a dedicated hosting plan can fix this issue. According to Microsoft's documentation, it appears that the function is allowed a maximum of 1,536MB of memory at one time. Of course, it could also be the case that your function is exceeding any of the other service limits associated with that plan, so my advice would be to add instrumentation and code defensively.
Sources
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Source: Stack Overflow
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