Find out what process is using the "Too many open files" issue on Mac

test.sh

# taken from this answer on stack exchange: https://superuser.com/a/1180084

# This will show the number of files open by all of the processes
sudo lsof -n | cut -f1 -d' ' | uniq -c | sort | tail

# When you find out which one is using the most files, see what files are being used by it
sudo lsof -n | grep java

# In my case, it's always java because elasticsearch doesn't clean up after being on for weeks, I guess
brew services restart elasticsearch

# ta da, no more "out of files"