Стандартный лимит NOFILE 1024 очень быстро исчерпывается, в официальной документации просят устанавливать более высокий лимит: https://github.com/telemt/telemt/blob/a383efcb21e478700ca731b022cddae1bef10552/README.md?plain=1#L216 https://github.com/telemt/telemt/blob/a383efcb21e478700ca731b022cddae1bef10552/docs/QUICK_START_GUIDE.ru.md?plain=1#L130
# serv telemt cat # systemctl cat telemt # /usr/lib/systemd/system/telemt.service [Unit] Description=Telemt - MTProxy for Telegram After=network.target [Service] Type=simple ExecStart=/usr/bin/telemt /etc/telemt/config.toml Restart=on-failure WorkingDirectory=/var/lib/telemt StateDirectory=telemt DynamicUser=yes AmbientCapabilities=CAP_NET_BIND_SERVICE [Install] WantedBy=multi-user.target # /etc/systemd/system/telemt.service.d/limits.conf [Service] LimitNOFILE=65536
Исправлено в telemt 3.3.35-alt1