Cloudflare DevelopersCD
Cloudflare Developers•6d ago•
1 reply
Hazel

Build fail due to connection timeout

Hi, I'm trying to build my Astro project using Cloudflare Workers build, but during the site build, it makes multiple web requests to fetch images.
On a local development environment, this works just fine, and indeed I can manually load the URLs it's attempting to hit.

In the worker build, however, I get the following error:
18:37:20.568    18:37:20   ├─ /~sink/blog/2025/10/vr-streamers/index.html (+287ms) 
18:37:30.951    fetch failed
18:37:30.951      Hint:
18:37:30.951        This issue often occurs when your MDX component encounters runtime errors.
18:37:30.951      Stack trace:
18:37:30.951        at node:internal/deps/undici/undici:13510:13
18:37:30.951        at runNextTicks (node:internal/process/task_queues:69:3)
18:37:30.951        at async getSizeImpl (file:///opt/buildhome/repo/dist/chunks/FlexImg_BkrOVuPy.mjs:31:45)
18:37:30.951      Caused by:
18:37:30.951      Connect Timeout Error (attempted address: i.uwu.network:443, timeout: 10000ms)
18:37:30.951        at onConnectTimeout (node:internal/deps/undici/undici:2602:28)
18:37:30.951        at process.processImmediate (node:internal/timers:485:21)
18:37:31.075    18:37:20   ├─ /~sink/blog/2025/12/2025/index.html ELIFECYCLE  Command failed with exit code 1.
18:37:31.102    Failed: error occurred while running build command


Notably: Connect Timeout Error (attempted address: i.uwu.network:443, timeout: 10000ms).
URLs under this address hit a server that serves a redirect to cdn.hyrule.pics, which itself is a Cloudflare Worker that serves a file. Why exactly this error consistently occurs I do not know - the build troubleshooting page does not mention any restriction on making network requests in builds.
Was this page helpful?