How do I diagnose 503 - Function host is not running (static web apps integrated functions)

Mike Harper 1

I have a static web app with C# integrated functions. Everything runs fine locally using the static web app CLI.

The github actions build completes and the app is published but all my functions get 503 Function host is not running responses.
I've tried turning on application insights and looking around the SWA portal but I can't find error the source anywhere

My host.json is just the standard/default:

{
    "version": "2.0",
    "logging": {
        "applicationInsights": {
            "samplingSettings": {
                "isEnabled": true,
                "excludedTypes": "Request"
            }
        }
    }
}

I'm in the dark on what is causing the deployed run time error.

Thanks

Pramod Valavala 20,636 Reputation points Microsoft Employee

2021-08-26T17:32:47.85+00:00

@Mike Harper This could happen for many reasons and one that is quite often is a missing app setting. Ensure you publish local settings as well.

If this doesn't help, try checking the streaming logs for errors.

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How do I diagnose 503 - Function host is not running (static web apps integrated functions)

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