too many open files

[1] 2023/02/28 11:40:55.704066 [ERR] Temporary Client Accept Error(accept tcp [::]:4222: accept4: too many open files), sleeping 10ms

/proc/sys/fs/file-nr
/proc/sys/fs/file-max

nats# cat /proc/sys/fs/file-nr
928	0	524288

/etc/security/limits.conf
@users hard nofile 524288

/etc/security/limits.conf
/etc/sysctl.conf
sysctl -a

• sysctl, -a, -p, -w, vm.swappiness, /etc/sysctl.conf, /etc/sysctl.d/, net.ipv4.ip_forward, OOM, Kernel.shmmax, prlimit