Listen error: unable to monitor directories for changes

Question

I am getting the following error while running my rails app in Ubuntu server

FATAL: Listen error: unable to monitor directories for changes. Visit https

Answer 1

For others who may have this issue. I had a VM disconnect which left the previous rails server running. Running below resolved the issue without needing to up the number of watcher.

 kill -9 $(lsof -i tcp:3000 -t)