says:
[00:30:35] root@openHABianPi:~# systemctl stop mosquitto.service
[00:30:42] root@openHABianPi:~# mosquitto -v
1526679047: mosquitto version 1.4.10 (build date Fri, 22 Dec 2017 08:19:25 +0000) starting
1526679047: Using default config.
1526679047: Opening ipv4 listen socket on port 1883.
1526679047: Opening ipv6 listen socket on port 1883.
All mosquitto.log from install openhabian to now:
1526656733: mosquitto version 1.4.10 (build date Fri, 22 Dec 2017 08:19:25 +0000) starting
1526656733: Config loaded from /etc/mosquitto/mosquitto.conf.
1526656733: Opening ipv4 listen socket on port 1883.
1526656733: Opening ipv6 listen socket on port 1883.
1526656737: Error in poll: Interrupted system call.
1526656737: mosquitto version 1.4.10 terminating
1526656738: mosquitto version 1.4.10 (build date Fri, 22 Dec 2017 08:19:25 +0000) starting
1526656738: Config loaded from /etc/mosquitto/mosquitto.conf.
1526656738: Opening ipv4 listen socket on port 1883.
1526656738: Opening ipv6 listen socket on port 1883.
1526656939: Error in poll: Interrupted system call.
1526656939: mosquitto version 1.4.10 terminating
1526656956: mosquitto version 1.4.10 (build date Fri, 22 Dec 2017 08:19:25 +0000) starting
1526656956: Config loaded from /etc/mosquitto/mosquitto.conf.
1526656956: Opening ipv4 listen socket on port 1883.
1526656956: Opening ipv6 listen socket on port 1883.
1526657220: Error in poll: Interrupted system call.
1526657220: mosquitto version 1.4.10 terminating
1526657246: mosquitto version 1.4.10 (build date Fri, 22 Dec 2017 08:19:25 +0000) starting
1526657246: Config loaded from /etc/mosquitto/mosquitto.conf.
1526657246: Opening ipv4 listen socket on port 1883.
1526657246: Opening ipv6 listen socket on port 1883.
1526657520: New connection from ::1 on port 1883.
1526657520: New client connected from ::1 as mosqsub/1010-openHABian (c1, k60).
1526657553: Socket error on client mosqsub/1010-openHABian, disconnecting.
1526658304: New connection from ::1 on port 1883.
1526658304: New client connected from ::1 as mosqpub/1236-openHABian (c1, k60).
1526658304: Client mosqpub/1236-openHABian disconnected.
1526658311: New connection from ::1 on port 1883.
1526658311: New client connected from ::1 as mosqsub/1237-openHABian (c1, k60).
1526658314: New connection from ::1 on port 1883.
1526658314: New client connected from ::1 as mosqpub/1239-openHABian (c1, k60).
1526658314: Client mosqpub/1239-openHABian disconnected.
1526658317: Socket error on client mosqsub/1237-openHABian, disconnecting.
1526658330: New connection from ::1 on port 1883.
1526658330: New client connected from ::1 as mosqsub/1245-openHABian (c1, k60).
1526659074: Saving in-memory database to /var/lib/mosquitto/mosquitto.db.
1526659669: Socket error on client mosqsub/1245-openHABian, disconnecting.
1526659674: Error in poll: Interrupted system call.
1526659674: mosquitto version 1.4.10 terminating
1526659701: mosquitto version 1.4.10 (build date Fri, 22 Dec 2017 08:19:25 +0000) starting
1526659701: Config loaded from /etc/mosquitto/mosquitto.conf.
1526659701: Opening ipv4 listen socket on port 1883.
1526659701: Opening ipv6 listen socket on port 1883.
1526660070: New connection from ::1 on port 1883.
1526660070: New client connected from ::1 as mosqsub/1010-openHABian (c1, k60).
1526660104: Socket error on client mosqsub/1010-openHABian, disconnecting.
1526660112: Error in poll: Interrupted system call.
1526660112: mosquitto version 1.4.10 terminating
1526660139: mosquitto version 1.4.10 (build date Fri, 22 Dec 2017 08:19:25 +0000) starting
1526660139: Config loaded from /etc/mosquitto/mosquitto.conf.
1526660139: Opening ipv4 listen socket on port 1883.
1526660139: Opening ipv6 listen socket on port 1883.
1526660252: New connection from ::1 on port 1883.
1526660252: New client connected from ::1 as mosqsub/966-openHABianP (c1, k60).
1526660383: Socket error on client mosqsub/966-openHABianP, disconnecting.
1526660771: New connection from ::1 on port 1883.
1526660771: New client connected from ::1 as mosqsub/1257-openHABian (c1, k60).
1526661074: Socket error on client mosqsub/1257-openHABian, disconnecting.
1526661144: Error in poll: Interrupted system call.
1526661144: mosquitto version 1.4.10 terminating
1526661171: mosquitto version 1.4.10 (build date Fri, 22 Dec 2017 08:19:25 +0000) starting
1526661171: Config loaded from /etc/mosquitto/mosquitto.conf.
1526661171: Opening ipv4 listen socket on port 1883.
1526661171: Opening ipv6 listen socket on port 1883.
1526661318: New connection from ::1 on port 1883.
1526661318: New client connected from ::1 as mosqsub/968-openHABianP (c1, k60).
1526661928: New connection from ::1 on port 1883.
1526661928: New client connected from ::1 as mosqsub/1187-openHABian (c1, k60).
1526661961: New connection from 192.168.1.175 on port 1883.
1526661961: New client connected from 192.168.1.175 as lens_A1kTbUeBsUadtEw4IfMi6xOh6bE (c1, k120).
1526662122: New connection from ::1 on port 1883.
1526662122: New client connected from ::1 as mosqpub/1248-openHABian (c1, k60).
1526662122: Client mosqpub/1248-openHABian disconnected.
1526662140: Socket error on client lens_A1kTbUeBsUadtEw4IfMi6xOh6bE, disconnecting.
1526662999: Saving in-memory database to /var/lib/mosquitto/mosquitto.db.
1526663109: Socket error on client mosqsub/968-openHABianP, disconnecting.
1526664800: Saving in-memory database to /var/lib/mosquitto/mosquitto.db.
1526665118: Socket error on client mosqsub/1187-openHABian, disconnecting.
1526666601: Saving in-memory database to /var/lib/mosquitto/mosquitto.db.
1526666677: New connection from 192.168.1.36 on port 1883.
1526666677: New client connected from 192.168.1.36 as SuperIOT (c1, k60).
1526666677: Client SuperIOT disconnected.
1526666695: New connection from ::1 on port 1883.
1526666695: New client connected from ::1 as mosqsub/2210-openHABian (c1, k60).
1526666704: New connection from 192.168.1.36 on port 1883.
1526666704: New client connected from 192.168.1.36 as SuperIOT (c1, k60).
1526666704: Client SuperIOT disconnected.
1526666789: New connection from 192.168.1.36 on port 1883.
1526666789: New client connected from 192.168.1.36 as SuperIOT (c1, k60).
1526666789: Client SuperIOT disconnected.
1526666811: New connection from 192.168.1.36 on port 1883.
1526666811: New client connected from 192.168.1.36 as SuperIOT (c1, k60).
1526666811: Client SuperIOT disconnected.
1526668359: Socket error on client mosqsub/2210-openHABian, disconnecting.
1526668402: Saving in-memory database to /var/lib/mosquitto/mosquitto.db.
1526670203: Saving in-memory database to /var/lib/mosquitto/mosquitto.db.
1526670492: New connection from ::1 on port 1883.
1526670492: New client connected from ::1 as mosqsub/2887-openHABian (c1, k60).
1526670974: New connection from ::1 on port 1883.
1526670974: New client connected from ::1 as mosqpub/3033-openHABian (c1, k60).
1526670974: Client mosqpub/3033-openHABian disconnected.
1526672004: Saving in-memory database to /var/lib/mosquitto/mosquitto.db.
1526672191: New connection from ::1 on port 1883.
1526672191: New client connected from ::1 as mosqpub/3270-openHABian (c1, k60).
1526672191: Client mosqpub/3270-openHABian disconnected.
1526672222: New connection from ::1 on port 1883.
1526672222: New client connected from ::1 as mosqpub/3277-openHABian (c1, k60).
1526672222: Client mosqpub/3277-openHABian disconnected.
1526672226: New connection from ::1 on port 1883.
1526672226: New client connected from ::1 as mosqpub/3278-openHABian (c1, k60).
1526672226: Client mosqpub/3278-openHABian disconnected.
1526673805: Saving in-memory database to /var/lib/mosquitto/mosquitto.db.
1526674308: Socket error on client mosqsub/2887-openHABian, disconnecting.
1526675606: Saving in-memory database to /var/lib/mosquitto/mosquitto.db.
1526677407: Saving in-memory database to /var/lib/mosquitto/mosquitto.db.
1526677495: New connection from ::1 on port 1883.
1526677495: New client connected from ::1 as mosqsub/4290-openHABian (c1, k60).
1526678489: Socket error on client mosqsub/4290-openHABian, disconnecting.
1526678492: Error in poll: Interrupted system call.
1526678492: mosquitto version 1.4.10 terminating
1526678515: mosquitto version 1.4.10 (build date Fri, 22 Dec 2017 08:19:25 +0000) starting
1526678515: Config loaded from /etc/mosquitto/mosquitto.conf.
1526678515: Opening ipv4 listen socket on port 1883.
1526678515: Opening ipv6 listen socket on port 1883.
1526679042: Error in poll: Interrupted system call.
1526679042: mosquitto version 1.4.10 terminating