Fail2ban at reload :
systemctl reload fail2ban.service
Job for fail2ban.service failed because the control process exited with error code.
Fail2ban restart works well. But it shows some error.
systemctl status fail2ban.service
● fail2ban.service - Fail2Ban Service
Loaded: loaded (/lib/systemd/system/fail2ban.service; enabled; vendor preset: enabled)
Active: active (running) since Sun 2020-03-29 14:56:31 IST; 35s ago
Docs: man:fail2ban(1)
Process: 29791 ExecStart=/usr/bin/fail2ban-client -x start (code=exited, status=0/SUCCESS)
Main PID: 29794 (fail2ban-server)
Tasks: 41 (limit: 4915)
CGroup: /system.slice/fail2ban.service
└─29794 /usr/bin/python3 /usr/bin/fail2ban-server -s /var/run/fail2ban/fail2ban.sock -p /var/run/fail2ban/fail2ban.pid -x -b
Mar 29 14:56:29 server.org systemd[1]: Starting Fail2Ban Service...
Mar 29 14:56:29 server.org fail2ban-client[29791]: 2020-03-29 14:56:29,738 fail2ban.server [29792]: INFO Starting Fail2ban v0.9.6
Mar 29 14:56:29 server.org fail2ban-client[29791]: 2020-03-29 14:56:29,738 fail2ban.server [29792]: INFO Starting in daemon mode
Mar 29 14:56:30 server.org fail2ban-client[29791]: ERROR NOK: ("No 'host' group in '^.*Client disconnected: connection closed
```",)
Mar 29 14:56:31 server.org systemd[1]: Started Fail2Ban Service.