Repository: next.js
Issue: Build occasionally fails complains about missing modules but also succeeds
Labels: good first issue,bug,Webpack

# Bug report

## Describe the bug

I have a fairly simple app that pings a mongo database and generates dynamic pages. The homepage lists a handful of documents and they link to individual pages. The build often fails complaining about missing modules despite running perfectly fine on localhost. However, if I build it a 2nd or 3rd time it will usually succeed.

## To Reproduce

Steps to reproduce the behavior, please provide code snippets or a repository:

1. Clone https://github.com/itsclarke/vantures
2. Install dependencies
3. Run `npm run dev`
4. While dev is running, also run `npm run build`
5. See errors

## Expected behavior

A failed build outputs:

```
> next build

info  - Loaded env from ~/app/.env.local
Creating an optimized production build  

Compiled successfully.

Automatically optimizing pages .
Error occurred prerendering page "/rental/new". Read more: https://err.sh/next.js/prerender-error
Error: Cannot find module for page: /rental/new
    at pageNotFoundError (~/app/node_modules/next/dist/next-server/server/require.js:1:384)
    at getPagePath (~/app/node_modules/next/dist/next-server/server/require.js:2:82)
    at requirePage (~/app/node_modules/next/dist/next-server/server/require.js:2:227)
    at loadComponents (~/app/node_modules/next/dist/next-server/server/load-components.js:1:771)
    at Object.exportPage [as default] (~/app/node_modules/next/dist/export/worker.js:14:188)

Error occurred prerendering page "/rental/10051164". Read more: https://err.sh/next.js/prerender-error
Error: Cannot find module for page: /rental/[id]
    at pageNotFoundError (~/app/node_modules/next/dist/next-server/server/require.js:1:384)
    at getPagePath (~/app/node_modules/next/dist/next-server/server/require.js:2:82)
    at requirePage (~/app/node_modules/next/dist/next-server/server/require.js:2:227)
    at loadComponents (~/app/node_modules/next/dist/next-server/server/load-components.js:1:771)
    at Object.exportPage [as default] (~/app/node_modules/next/dist/export/worker.js:14:188)

Error occurred prerendering page "/rental/10082307". Read more: https://err.sh/next.js/prerender-error
Error: Cannot find module for page: /rental/[id]
    at pageNotFoundError (~/app/node_modules/next/dist/next-server/server/require.js:1:384)
    at getPagePath (~/app/node_modules/next/dist/next-server/server/require.js:2:82)
    at requirePage (~/app/node_modules/next/dist/next-server/server/require.js:2:227)
    at loadComponents (~/app/node_modules/next/dist/next-server/server/load-components.js:1:771)
    at Object.exportPage [as default] (~/app/node_modules/next/dist/export/worker.js:14:188)

Error occurred prerendering page "/rental/10138784". Read more: https://err.sh/next.js/prerender-error
Error: Cannot find module for page: /rental/[id]
    at pageNotFoundError (~/app/node_modules/next/dist/next-server/server/require.js:1:384)
    at getPagePath (~/app/node_modules/next/dist/next-server/server/require.js:2:82)
    at requirePage (~/app/node_modules/next/dist/next-server/server/require.js:2:227)
    at loadComponents (~/app/node_modules/next/dist/next-server/server/load-components.js:1:771)
    at Object.exportPage [as default] (~/app/node_modules/next/dist/export/worker.js:14:188)

Error occurred prerendering page "/rental/10057826". Read more: https://err.sh/next.js/prerender-error
Error: Cannot find module for page: /rental/[id]
    at pageNotFoundError (~/app/node_modules/next/dist/next-server/server/require.js:1:384)
    at getPagePath (~/app/node_modules/next/dist/next-server/server/require.js:2:82)
    at requirePage (~/app/node_modules/next/dist/next-server/server/require.js:2:227)
    at loadComponents (~/app/node_modules/next/dist/next-server/server/load-components.js:1:771)
    at Object.exportPage [as default] (~/app/node_modules/next/dist/export/worker.js:14:188)

Error occurred prerendering page "/rental/10059872". Read more: https://err.sh/next.js/prerender-error
Error: Cannot find module for page: /rental/[id]
    at pageNotFoundError (~/app/node_modules/next/dist/next-server/server/require.js:1:384)
    at getPagePath (~/app/node_modules/next/dist/next-server/server/require.js:2:82)
    at requirePage (~/app/node_modules/next/dist/next-server/server/require.js:2:227)
    at loadComponents (~/app/node_modules/next/dist/next-server/server/load-components.js:1:771)
    at Object.exportPage [as default] (~/app/node_modules/next/dist/export/worker.js:14:188)

Error occurred prerendering page "/". Read more: https://err.sh/next.js/prerender-error
Error: Cannot find module for page: /
    at pageNotFoundError (~/app/node_modules/next/dist/next-server/server/require.js:1:384)
    at getPagePath (~/app/node_modules/next/dist/next-server/server/require.js:2:82)
    at requirePage (~/app/node_modules/next/dist/next-server/server/require.js:2:227)
    at loadComponents (~/app/node_modules/next/dist/next-server/server/load-components.js:1:771)
    at Object.exportPage [as default] (~/app/node_modules/next/dist/export/worker.js:14:188)

> Build error occurred
Error: Export encountered errors on following paths:
        /
        /rental/10051164
        /rental/10057826
        /rental/10059872
        /rental/10082307
        /rental/10138784
        /rental/new
    at exportApp (~/app/node_modules/next/dist/export/index.js:24:1103)
    at processTicksAndRejections (internal/process/task_queues.js:93:5)
    at async build (~/app/node_modules/next/dist/build/index.js:37:218)
```

When it succeeds the build outputs:

```
info  - Loaded env from /Users/brianclarke/Documents/development/next-vanture/.env.local
Creating an optimized production build  

Compiled successfully.

Automatically optimizing pages .Could not find files for /rental/new in .next/build-manifest.json
Automatically optimizing pages ..Could not find files for /rental/[id] in .next/build-manifest.json
Automatically optimizing pages  

Page                              Size     First Load JS
┌ ● /                             3.89 kB        62.7 kB
├   /_app                         0 B            58.8 kB
├ ○ /404                          3.02 kB        61.9 kB
├ λ /api/rental/[id]              0 B            58.8 kB
├ λ /api/rental/new               0 B            58.8 kB
├ λ /api/results                  0 B            58.8 kB
├ ● /rental/[id]                  1.42 kB        60.2 kB
├   ├ /rental/10059872
├   ├ /rental/10051164
├   ├ /rental/10082307
├   └ [+2 more paths]
└ ○ /rental/new                   54.2 kB         113 kB
+ First Load JS shared by all     58.8 kB
  ├ chunks/commons.90eb9f.js      10.2 kB
  ├ chunks/framework.9862e0.js    40.5 kB
  ├ chunks/main.68a017.js         6.73 kB
  ├ chunks/pages/_app.7abee3.js   280 B
  ├ chunks/webpack.f300b4.js      1.19 kB
  └ css/fafd01249af2219e34a0.css  194 B

λ  (Server)  server-side renders at runtime (uses getInitialProps or getServerSideProps)
○  (Static)  automatically rendered as static HTML (uses no initial props)
●  (SSG)     automatically generated as static HTML + JSON (uses getStaticProps)

Redirects

┌ source: /:path+/
├ destination: /:path+
└ permanent: true
```

But the other server running the API code outputs this as well:

```
the options [servers] is not supported
the options [caseTranslate] is not supported
the options [dbName] is not supported
the options [srvHost] is not supported
the options [credentials] is not supported
the options [servers] is not supported
the options [caseTranslate] is not supported
the options [dbName] is not supported
the options [srvHost] is not supported
the options [credentials] is not supported
the options [username] is not supported
the server/replset/mongos/db options are deprecated, all their options are supported at the top level of the options object [poolSize,ssl,sslValidate,sslCA,sslCert,sslKey,sslPass,sslCRL,autoReconnect,noDelay,keepAlive..
```

## System information

- OS: macOS
- Version of Next.js: 9.5.1
- Version of Node.js: 14.5.0