inotify cannot be used; too many open files

Today, while I was doing a little bit of dev on a server, I got with a tail: [bash] tail: inotify cannot be used, reverting to polling: Too many open files [/bash]

Below, a quick command to get the culprits: lsof | awk '{ print $2; }' | uniq -c | sort -rn | head

The first columns is the number of open file, and the second column is the pid