Docusaurus + /docs takes hours to build on Github actions

[danon]

🐛 Bug Report

Docusaurus app, when run npm run build and/or npm run deploy works locally, but on github actions it takes hours; and fails anyway (Github terminates it after 360 minutes).

Have you read the Contributing Guidelines on issues?

Yes

To Reproduce

Here's the repo with the failure: https://github.com/T-Regx/T-Regx.github.io/runs/1342405267?check_suite_focus=true

I've tried different jobs, I've written my own (build.yml and node.js.yml), and I've also copied one provided in: https://v2.docusaurus.io/docs/deployment/#deploy

The npm install and the ssh steps work just fine. But npm run build and/or npm run deploy seem stuck. You can read the logs in the actions

The log that appears to be repeating often is:
(node:2546) UnhandledPromiseRejectionWarning: Error: ENOENT: no such file or directory, open '/home/runner/work/T-Regx.github.io/T-Regx.github.io/website/.docusaurus/docusaurus-plugin-content-blog/default/site-blog-2020-02-18-release-0-9-2-md-8f9.json'
(node:2546) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)

Expected behavior

I would expect for docusaurus to build on GH Actions, just as easily as locally.

Actual Behavior

The build is failing. I understand it tries to read files from website/.docusaurus folder, but the folder doesn't exist there.

Your Environment

The repo is public: https://github.com/T-Regx/T-Regx.github.io You can see the workflows

• Docusaurus version used: @docusaurus/core": "2.0.0-alpha.61
• Environment name and version (e.g. Chrome 78.0.3904.108, Node.js 10.17.0): Github Actions
• Operating system and version (desktop or mobile):

Reproducible Demo

(Paste the link to an example repo, including a siteConfig.js, and exact instructions to reproduce the issue.)

https://github.com/T-Regx/T-Regx.github.io

[danon]

I'm attaching the build step log:
build.log

[slorber]

Hi

Please including a npm/yarn lockfile and upgrade to latest docusaurus version.

We'll see if this happens again on latest version, and with a more deterministic build.

Also worth trying to see if the same problem happens on Netlify, or if you increase GH actions memory (if possible?)

[danon]

@slorber Thank you!

I updated "@docusaurus/core" from "2.0.0-alpha.61" to "2.0.0-alpha.66" and it builds in no time now! Thank you.

[slorber]

Great 😜