: Ensure the main service is running with ps ax | grep zabbix_server .
on the agent:
Edit the systemd service file: systemctl edit zabbix-server (or zabbix-proxy ). Add the following lines: [Service] LimitNOFILE=65535 Use code with caution. Copied to clipboard Reload and restart: systemctl daemon-reload systemctl restart zabbix-server Use code with caution. Copied to clipboard zabbix cannot write to ipc socket broken pipe upd
Edit /etc/security/limits.conf :
df -h /var/run /tmp df -i /var/run /tmp
Increase if needed: