fetch times out in under 5 seconds

Bug Description

When trying to fetch a URL a fetch failed error is thrown with the code as code: ‘UND_ERR_CONNECT_TIMEOUT’ , This error is thrown at a request that barely takes 5 - 6 seconds to complete and other HTTP clients like axios and curl perform flawlessly on the same server

Reproducible By

Fetch any discord API url

Expected Behavior

The fetch should complete which is well below the 120s timeout

Logs & Screenshots

/home/arnav/Documents/tej.js/node_modules/undici/lib/fetch/index.js:197
        Object.assign(new TypeError('fetch failed'), { cause: response.error })
                      ^
TypeError: fetch failed
    at Object.processResponse (/home/arnav/Documents/tej.js/node_modules/undici/lib/fetch/index.js:197:23)
    at /home/arnav/Documents/tej.js/node_modules/undici/lib/fetch/index.js:930:38
    at node:internal/process/task_queues:141:7
    at AsyncResource.runInAsyncScope (node:async_hooks:201:9)
    at AsyncResource.runMicrotask (node:internal/process/task_queues:138:8)
    at processTicksAndRejections (node:internal/process/task_queues:96:5) {
  cause: ConnectTimeoutError: Connect Timeout Error
      at Timeout.onConnectTimeout [as _onTimeout] (/home/arnav/Documents/tej.js/node_modules/undici/lib/core/connect.js:108:24)
      at listOnTimeout (node:internal/timers:561:11)
      at processTimers (node:internal/timers:502:7) {
    code: 'UND_ERR_CONNECT_TIMEOUT'
  }
}

Environment

Gentoo, Node v17.6.0

Additional context

Happen on every discord API url and used to work some time back but suddenly just fails everywhere.

[SebastianZimmer]

I am also getting UND_ERR_CONNECT_TIMEOUT after ~5 secs when IPv6 is not configured or working properly. With curl, Chrome and other clients, it still works via IPv4. This seems to be because Node does not implement Happy Eyeballs. There is already an issue for this: https://github.com/nodejs/node/issues/41625

[mcollina]

That’s not the problem. The problem is that all those folks have IPv6 misconfigured and we are missing Happy Eyeballs in Node.js https://github.com/nodejs/node/issues/41625. Hopefully it will land before Node.js v18 goes LTS or shortly thereafter.