Application failed to respond | Railway | Page 1

vernal violet Jun 30, 2023, 5:29 AM

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Hey guys. So I'm building a simple FastAPI application connected with Zapier to summarise incoming newsletters to a Notion db.

The app seems to have run as I do get:

INFO: Started server process [1]
INFO: Waiting for application startup.
INFO: Application startup complete.
INFO: Uvicorn running on http://0.0.0.0:10000 (Press CTRL+C to quit)

in deploy logs.

But on the hosted URL, I get Application failed to respond and on Zapier I get a 502 error. I have added the start command uvicorn main:app --host 0.0.0.0 --port 10000 for the FastAPI app. Any help appreciated thanks

Screenshot_2023-06-30_at_10.57.28_AM.png

strange creekBOT Jun 30, 2023, 5:29 AM

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To help others find answers, you can mark your question as solved via Right click solution message -> Apps -> ✅ Mark Solution

vast falconBOT Jun 30, 2023, 5:29 AM

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Project ID: N/A

vernal violet Jun 30, 2023, 5:30 AM

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Screenshot_2023-06-30_at_10.59.39_AM.png

wheat wolf Jun 30, 2023, 5:30 AM

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I see the problem, can you provide me with your current start command so I can fix it up?

vernal violet Jun 30, 2023, 5:30 AM

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Start command: uvicorn main:app --host 0.0.0.0 --port 10000

wheat wolf Jun 30, 2023, 5:31 AM

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uvicorn main:app --host 0.0.0.0 --port $PORT

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there ya go

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railway assigns the PORT variable to what it expects your app to be listening on, otherwise railway won't know how to connect to your app and you will see the railway error page

vernal violet Jun 30, 2023, 5:32 AM

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Oh so I should replace it with $PORT?

wheat wolf Jun 30, 2023, 5:33 AM

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I have already done that for you, use the start command I sent

vernal violet Jun 30, 2023, 5:33 AM

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Ohh I see.. thanks lemme try it

wheat wolf Jun 30, 2023, 5:33 AM

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if you wanna read a slightly more in depth explanation on this, you can check out this docs page
https://docs.railway.app/troubleshoot/fixing-common-errors

vernal violet Jun 30, 2023, 5:56 AM

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Thanks a lot Brody this worked. I'm getting some logical issues which I'll look into but really appreciate the quick and prompt resolution!

wheat wolf Jun 30, 2023, 5:57 AM

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no problem, happy to help 🙂

#Application failed to respond