Erich Weiler <weiler(a)soe.ucsc.edu> writes:
Does this have something to do with systemd?
Bingo.
Try...
mkdir /etc/systemd/system/rabbitmq-server.service.d
cat <<EOF > /etc/systemd/system/rabbitmq-server.service.d/limits.conf
[Service]
LimitNOFILE=16384
EOF
eck