I have just dogged another crisis. Seemingly PetalBut make requests at accelerating speed. Then we hit a problem where I may not be able to kill nginx root@helos ~ # systemctl stop nginx Failed to allocate directory watch: Too many open files After that, root@helos ~ # ps axf | grep nginx 804800 pts/2 S+ 0:00 \_ grep nginx so it may not run any more, but repeating the nginx shoutdown shows the same warning And then, a few minutes after that, helos starts runing again. I added # case sensitive matching if ($http_user_agent ~ (PetalBot)) { return 403; } to /etc/nginx/sites-available/collec.repec.org That may keep them out. Then killing the containers (????) root@helos ~ # killall -9 containerd-shim-runc-v2 and root@helos ~ # systemctl start nginx -- Written by Thomas Krichel http://openlib.org/home/krichel on his 21163rd day.