Nodemon: [nodemon] Internal watch failed: watch ENOSPC

[showzyl]

[nodemon] 1.10.2
[nodemon] to restart at any time, enter rs
[nodemon] watching: _._
[nodemon] starting node index.js
...
[nodemon] Internal watch failed: watch ENOSPC

[remy]

http://lmgtfy.com/?q=ENOSPC

[nxdiiode]

This version of Node is misleading about ENOSPC (no space): We actually just hit the maximum number of watchers for files.

Newer versions of Node i.e. 11.0.0+ give a feedback of a better quality instead:
[nodemon] Internal watch failed: ENOSPC: System limit for number of file watchers reached, watch '/a/filename/where/it/ran/out/of/watchers'

• Check that all watched files and subfolders need to be watched (don't forget dot files).
• If you really need to watch so many files (> 8000), increase the number of threads.
  https://github.com/guard/listen/wiki/Increasing-the-amount-of-inotify-watchers
  https://github.com/remy/nodemon/issues/907 mentions the following permanent modification:
  echo fs.inotify.max_user_watches=524288 | sudo tee -a /etc/sysctl.conf && sudo sysctl -p