SSR on CloudFlare Pages sometimes throwing "Error 1101: The script will never generate a response" | Astro Lounge | Page 1

molten ice Apr 6, 2023, 11:06 PM

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I have an Astro 2.1.7 project deployed to CloudFlare Pages with SSR enabled. This seems to be working just fine. For a CMS I'm using Storyblok hence the SSR in the deployment so my content editor can see their changes update every time they hit "save". However, as they edit content, hitting save a number of times and switching pages in the visual editor in Storyblok, they eventually get an error.

CloudFlare reports "Error 1101" which is a 500 error from the web worker that's doing the SSR. When I investigated the logs, it said "The script will never generate a response".

Based on my research, this can happen when a promise isn't fully resolved in the function. Could this be an issue with Storyblok not responding quickly enough in an API request? The web worker CPU limit is just 10ms https://developers.cloudflare.com/workers/platform/limits/#worker-limits

zenith terrace Apr 6, 2023, 11:29 PM

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idk about storyblok but the workers 10ms limit is the cpu usage limit, not the wall clock limit

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it could sit idle waiting for a fetch response without bumping closer to 10ms

molten ice Apr 6, 2023, 11:47 PM

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Yeah, that's what I figured.

molten ice Apr 7, 2023, 12:18 AM

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I'm wondering if there's some way to debug this further.

zenith terrace Apr 7, 2023, 12:21 AM

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maybe try it on miniflare

molten ice Apr 7, 2023, 12:24 AM

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Ah I had no idea this existed. However, this is Astro's own SSR function, not mine.

river granite Nov 14, 2023, 11:21 AM

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@molten ice did you get anywhere with this? I'm also experiencing the same issue

molten ice Nov 14, 2023, 8:18 PM

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river granite <@342740505693519893> did you get anywhere with this? I'm also experiencing the ...

There is a thread about it here on github https://github.com/withastro/adapters/issues/43

GitHub

Erron when hosting in Cloudflare with Server Side Rendering enabled...

What version of astro are you using? 2.7.4 Are you using an SSR adapter? If so, which one? Cloudflare What package manager are you using? npm What operating system are you using? Mac What browser a...

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Basically, it seems like a Storyblok issue

molten ice Nov 14, 2023, 8:46 PM

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I've also decided to report this directly to Storyblok since nobody else see to have done that https://github.com/storyblok/storyblok-js-client/issues/682

GitHub

Storyblok client throttling crashing Astro adapter in CloudFlare Wo...

I have a project using Astro. Astro has a CloudFlare Worker "adapter" for doing server side rendering (SSR). This will re-render the preview page every time someone hits "save" ...

zenith terrace Nov 14, 2023, 8:50 PM

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storyblok may be able to do something about this, but really it is a limitation of cloudflare's infrastructure, isnt it

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as explained by the cloudflare engineer in the hacker news threads

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multiple requests may share the same worker instance, and its global state

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but if some code attempts to read write shared global state, the runtime does not handle it well

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deft bear Nov 15, 2023, 4:59 AM

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Great thread, thanks all. Bummer that it's an issue with Storyblok not playing nice with Cloudflare, until now I was assuming upgrading to Paid Workers would resolve 🙃

molten ice Dec 5, 2023, 8:05 PM

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zenith terrace but if some code attempts to read write shared global state, the runtime does no...

that shouldn't affect it. This is an issue with promises not being handled correctly.

zenith terrace Dec 5, 2023, 8:06 PM

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by whose code?

#SSR on CloudFlare Pages sometimes throwing "Error 1101: The script will never generate a response"