May 19 22:29:48 freenas_main upsmon[2023]: Poll UPS [ups-pro] failed - Driver not connected
May 19 22:29:53 freenas_main upsd[2015]: Can't connect to UPS [ups-pro] (usbhid-ups-ups-pro): Connection refused

...Lots of repetition of the previous two lines...

May 19 22:55:32 freenas_main upsmon[2023]: Poll UPS [ups-pro] failed - Driver not connected
May 19 22:55:32 freenas_main upsmon[2023]: UPS ups-pro is unavailable
May 19 22:55:37 freenas_main upsmon[2023]: Poll UPS [ups-pro] failed - Driver not connected
May 19 22:56:23 freenas_main upsmon[2023]: Poll UPS [ups-pro] failed - Driver not connected
May 19 22:56:27 freenas_main notifier: Stopping nut.
May 19 22:56:27 freenas_main upsd[2015]: mainloop: Interrupted system call
May 19 22:56:27 freenas_main notifier: Waiting for PIDS: 2015.
May 19 22:56:27 freenas_main notifier: kill: No such process
May 19 22:56:27 freenas_main notifier: Stopping /var/db/nut/usbhid-ups-ups-pro.pid failed: No such process
May 19 22:56:27 freenas_main notifier: Network UPS Tools - UPS driver controller 2.7.3
May 19 22:56:27 freenas_main notifier: Stopping nut_upsmon.
May 19 22:56:27 freenas_main upsmon[2021]: upsmon parent: read
May 19 22:56:28 freenas_main notifier: Waiting for PIDS: 2023, 2023.
May 19 22:56:28 freenas_main notifier: Stopping nut_upslog.
May 19 22:56:28 freenas_main notifier: Waiting for PIDS: 2018.
May 19 22:56:28 freenas_main notifier: nut not running? (check /var/db/nut/upsd.pid).
May 19 22:56:28 freenas_main notifier: kill: No such process
May 19 22:56:28 freenas_main notifier: Using subdriver: APC HID 0.95
May 19 22:56:28 freenas_main notifier: Network UPS Tools - Generic HID driver 0.39 (2.7.3)
May 19 22:56:28 freenas_main notifier: USB communication driver 0.32
May 19 22:56:29 freenas_main notifier: Network UPS Tools - UPS driver controller 2.7.3
May 19 22:56:29 freenas_main notifier: Starting nut.
May 19 22:56:29 freenas_main notifier: fopen /var/db/nut/upsd.pid: No such file or directory
May 19 22:56:29 freenas_main notifier: listening on 127.0.0.1 port 3493
May 19 22:56:29 freenas_main notifier: Connected to UPS [ups-pro]: usbhid-ups-ups-pro
May 19 22:56:29 freenas_main notifier: /usr/local/etc/nut/cmdvartab not found - disabling descriptions
May 19 22:56:29 freenas_main notifier: nut_upsmon not running? (check /var/db/nut/upsmon.pid).
May 19 22:56:29 freenas_main notifier: Starting nut_upsmon.
May 19 22:56:29 freenas_main notifier: kill: No such process
May 19 22:56:29 freenas_main notifier: UPS: ups-pro (master) (power value 1)
May 19 22:56:29 freenas_main notifier: Using power down flag file /etc/nokillpower
May 19 22:56:29 freenas_main notifier: nut_upslog not running? (check /var/db/nut/upslog.pid).
May 19 22:56:29 freenas_main notifier: Starting nut_upslog.
May 20 00:00:00 freenas_main syslog-ng[1499]: Configuration reload request received, reloading configuration;
May 20 16:55:18 freenas_main ugen4.2: <American Power Conversion> at usbus4 (disconnected)
May 20 21:55:19 freenas_main devd: Executing 'kldload -n uhid'
May 20 16:55:19 freenas_main ugen4.2: <American Power Conversion> at usbus4
May 21 11:10:52 freenas_main ugen4.2: <American Power Conversion> at usbus4 (disconnected)
May 21 11:10:53 freenas_main ugen4.2: <American Power Conversion> at usbus4
May 21 16:10:53 freenas_main devd: Executing 'kldload -n uhid'
May 21 11:23:08 freenas_main kernel: Limiting closed port RST response from 202 to 200 packets/sec
May 21 11:23:08 freenas_main kernel: Limiting closed port RST response from 202 to 200 packets/sec
May 21 12:51:56 freenas_main upsd[70363]: Can't connect to UPS [ups-pro] (usbhid-ups-ups-pro): Connection refused
May 21 12:51:56 freenas_main ugen4.2: <American Power Conversion> at usbus4 (disconnected)
May 21 12:51:56 freenas_main kernel: pid 70361 (usbhid-ups), uid 66: exited on signal 11
May 21 12:51:57 freenas_main ugen4.2: <American Power Conversion> at usbus4
May 21 17:51:57 freenas_main devd: Executing 'kldload -n uhid'
May 21 12:52:00 freenas_main upsmon[70388]: Poll UPS [ups-pro] failed - Driver not connected
May 21 12:52:00 freenas_main upsmon[70388]: Communications with UPS ups-pro lost
May 21 12:52:06 freenas_main upsmon[70388]: Poll UPS [ups-pro] failed - Driver not connected
May 21 12:52:11 freenas_main upsmon[70388]: Poll UPS [ups-pro] failed - Driver not connected
May 21 12:52:16 freenas_main upsmon[70388]: Poll UPS [ups-pro] failed - Driver not connected
May 21 12:52:21 freenas_main upsmon[70388]: Poll UPS [ups-pro] failed - Driver not connected
May 21 12:52:26 freenas_main upsmon[70388]: Poll UPS [ups-pro] failed - Driver not connected
May 21 12:52:31 freenas_main upsmon[70388]: Poll UPS [ups-pro] failed - Driver not connected
May 21 12:52:36 freenas_main kernel: arp: 10.17.10.126 moved from 02:ff:60:00:07:0a to 00:25:90:64:07:22 on epair2b
May 21 12:52:36 freenas_main upsmon[70388]: Poll UPS [ups-pro] failed - Driver not connected
May 21 12:52:41 freenas_main upsmon[70388]: Poll UPS [ups-pro] failed - Driver not connected
May 21 12:52:47 freenas_main upsmon[70388]: Poll UPS [ups-pro] failed - Driver not connected
May 21 12:52:50 freenas_main notifier: Stopping nut.
May 21 12:52:50 freenas_main upsd[70363]: mainloop: Interrupted system call
May 21 12:52:50 freenas_main notifier: Waiting for PIDS: 70363.
May 21 12:52:50 freenas_main notifier: kill: No such process
May 21 12:52:50 freenas_main notifier: Stopping /var/db/nut/usbhid-ups-ups-pro.pid failed: No such process
May 21 12:52:50 freenas_main notifier: Network UPS Tools - UPS driver controller 2.7.3
May 21 12:52:51 freenas_main notifier: Stopping nut_upsmon.
May 21 12:52:51 freenas_main upsmon[70387]: upsmon parent: read
May 21 12:52:51 freenas_main notifier: Waiting for PIDS: 70388.
May 21 12:52:51 freenas_main notifier: Stopping nut_upslog.
May 21 12:52:51 freenas_main notifier: Waiting for PIDS: 70412.
May 21 12:52:51 freenas_main notifier: nut not running? (check /var/db/nut/upsd.pid).
May 21 12:52:51 freenas_main notifier: kill: No such process
May 21 12:52:51 freenas_main notifier: Using subdriver: APC HID 0.95
May 21 12:52:51 freenas_main notifier: Network UPS Tools - Generic HID driver 0.39 (2.7.3)
May 21 12:52:51 freenas_main notifier: USB communication driver 0.32
May 21 12:52:51 freenas_main notifier: Network UPS Tools - UPS driver controller 2.7.3
May 21 12:52:51 freenas_main notifier: Starting nut.
May 21 12:52:51 freenas_main notifier: fopen /var/db/nut/upsd.pid: No such file or directory
May 21 12:52:51 freenas_main notifier: listening on 127.0.0.1 port 3493
May 21 12:52:51 freenas_main notifier: Connected to UPS [ups-pro]: usbhid-ups-ups-pro
May 21 12:52:51 freenas_main notifier: /usr/local/etc/nut/cmdvartab not found - disabling descriptions
May 21 12:52:51 freenas_main notifier: nut_upsmon not running? (check /var/db/nut/upsmon.pid).
May 21 12:52:51 freenas_main notifier: Starting nut_upsmon.
May 21 12:52:51 freenas_main notifier: kill: No such process
May 21 12:52:51 freenas_main notifier: UPS: ups-pro (master) (power value 1)
May 21 12:52:51 freenas_main notifier: Using power down flag file /etc/nokillpower
May 21 12:52:51 freenas_main notifier: nut_upslog not running? (check /var/db/nut/upslog.pid).
May 21 12:52:51 freenas_main notifier: Starting nut_upslog.
May 21 13:15:50 freenas_main ugen4.2: <American Power Conversion> at usbus4 (disconnected)
May 21 18:15:51 freenas_main devd: Executing 'kldload -n uhid'
May 21 13:15:51 freenas_main ugen4.2: <American Power Conversion> at usbus4
May 22 16:19:31 freenas_main ugen4.2: <American Power Conversion> at usbus4 (disconnected)
May 22 21:19:32 freenas_main devd: Executing 'kldload -n uhid'
May 22 16:19:32 freenas_main ugen4.2: <American Power Conversion> at usbus4
May 22 16:39:27 freenas_main kernel: arp: 10.17.10.126 moved from 02:ff:60:00:07:0a to 00:25:90:64:07:22 on epair2b