Build freezes on Creating an optimized production build ...

[intelcoder]

Bug report

Describe the bug

I have tried deleting .next, yarn.lock, node_modules and using latest version of nextjs.

Build freezes on Creating an optimized production build ...

while it stuck with that message. It creates .next directory.

And routes-manifest.json
{"version":1,"pages404":true,"basePath":"","redirects":[],"rewrites":[],"headers":[],"dynamicRoutes":[]}

I am guessing build script does not feature out routes.

To Reproduce

Dev mode works fine.
I think it might happening because of my setup. I am using custom server.js due to dynamic url.

server.js

app.prepare().then(() => {
  createServer(async (req, res) => {
    // Be sure to pass `true` as the second argument to `url.parse`.
    // This tells it to parse the query portion of the URL.
    const parsedUrl = parse(req.url, true)
    const { pathname, query } = parsedUrl
    if (
      pathname === '/' ||
      pathname === '/favicon.ico' ||
      pathname.match('_next')
    ) {
      app.render(req, res, pathname, query)
    } else {
      let result
      // fetch url lookup data to know which page component should be used
      try {
        result = await instance.get('/urllookups', {
          params: {
            url: pathname.slice(1),
          },
        })
      } catch(e) {
        console.log('error', e)
      }
      res.lookups = result.data.data
      app.render(req, res, '/lookups', query)
    }
  }).listen(3000, err => {
    if (err) throw err
    console.log('> Ready on http://localhost:3000')
  })
})

.babelrc

{
  "presets": ["next/babel"],
  "plugins": [
    [
      "styled-components",
      {
        "ssr": true,
        "displayName": true,
        "preprocess": false
      }
    ]
  ]
}

Expected behavior

I expected build process works like charm.
A clear and concise description of what you expected to happen.

System information

• OS: [macOS]
• Browser (if applies) [chrome]
• Version of Next.js: [tried with 9.3.4, 9.3.5-canary.4]

Additional context

Add any other context about the problem here.

[timneutkens]

It's practically impossible to debug this without a complete reproduction. Please provide a reproduction 🙏

[intelcoder]

@timneutkens Sorry about that.
I created git repo to reproduce this issue. Only different setup is probably custom server for dynamic url and config
https://github.com/intelcoder/reproduce

Let me know if you need anything

[erikdstock]

I believe I'm experiencing the same issue on this branch, but only if i upgrade next 9.3.0 to 9.3.4:
https://github.com/uglycaucus/uglycauc-us/tree/static-build-improvements

(Should be reproducible with a simple upgrade + yarn export)

[ijjk]

Hi @intelcoder, it looks like you are placing your server.js file in your pages folder which is causing the build to stall. We are investigating how to catch this and provide a better error although only pages should be placed in your pages folder

[erikdstock]

@Timer I was having what felt like a very similar issue and posted instructions to replicate above. Do you think this is a separate issue? Should I be opening a new one or asking for help elsewhere?

[timneutkens]

Yeah you can open up a new issue.

[balazsorban44]

This issue has been automatically locked due to no recent activity. If you are running into a similar issue, please create a new issue with the steps to reproduce. Thank you.