# MQTT connection lost **URL:** \ **Category:** Items & Sitemaps\ **Tags:** mqtt, mqtt-binding, mqttsonoff\ **Created:** [July 21, 2017, 12:44am UTC](https://community.openhab.org/t/mqtt-connection-lost/31993 "2017-07-21T00:44:03Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![paulo9999](https://community.openhab.org/user_avatar/community.openhab.org/paulo9999/32/58366_2.png) [@paulo9999](https://community.openhab.org/u/paulo9999)\ **Post date:** [July 21, 2017, 12:44am UTC](https://community.openhab.org/t/mqtt-connection-lost/31993/1 "2017-07-21T00:44:03Z")
Hello, I’m trying to configure SONOFF using MQTT in Openhab but looking at the log file I find the following errors one after the other: [203:org.openhab.io.transport.mqtt:1.10.0] at org.eclipse.paho.client.mqttv3.internal.CommsReceiver.run(CommsReceiver.java:107)[203:org.openhab.io.transport.mqtt:1.10.0] … 1 more 2017-07-20 21:36:27.550 [ERROR] [t.mqtt.internal.MqttBrokerConnection] - MQTT connection to ‘raspberrypi’ was lost: Connection lost : ReasonCode 32109 : Cause : null 2017-07-20 21:36:27.553 [INFO] [t.mqtt.internal.MqttBrokerConnection] - Starting connection helper to periodically try restore connection to broker ‘raspberrypi’ 2017-07-20 21:36:37.559 [INFO] [t.mqtt.internal.MqttBrokerConnection] - Starting MQTT broker connection ‘raspberrypi’ 2017-07-20 21:36:38.825 [ERROR] [t.mqtt.internal.MqttBrokerConnection] - MQTT connection to broker was lost Connection lost (32109) - java.io.EOFException at org.eclipse.paho.client.mqttv3.internal.CommsReceiver.run(CommsReceiver.java:146)[203:org.openhab.io.transport.mqtt:1.10.0] at java.lang.Thread.run(Thread.java:745)[:1.8.0\_65] Caused by: java.io.EOFException at java.io.DataInputStream.readByte(DataInputStream.java:267)[:1.8.0\_65] at org.eclipse.paho.client.mqttv3.internal.wire.MqttInputStream.readMqttWireMessage(MqttInputStream.java:65) please anyone can help me?? thank you ---
**Author:** ![hr3](https://community.openhab.org/letter_avatar_proxy/v4/letter/h/48db29/32.png) [@hr3](https://community.openhab.org/u/hr3)\ **Post date:** [July 21, 2017, 7:19am UTC](https://community.openhab.org/t/mqtt-connection-lost/31993/2 "2017-07-21T07:19:55Z")
Please show your defnitions in mqtt.cfg and one example for a item with mqtt. Does the broker work and what is the name/ip of the server where the broker runs. ---
**Author:** ![narf27](https://community.openhab.org/letter_avatar_proxy/v4/letter/n/8797f3/32.png) [@narf27](https://community.openhab.org/u/narf27)\ **Post date:** [July 21, 2017, 2:39pm UTC](https://community.openhab.org/t/mqtt-connection-lost/31993/3 "2017-07-21T14:39:35Z")
Hello! Can i take over this thread or should i open a new one? i have almost (?) the same problem (already posted in [ITEAD sonoff switches thread](https://community.openhab.org/t/itead-sonoff-switches-and-sockets-cheap-esp8266-wifi-mqtt-hardware/15024/244), no answer though): openHAB won’t connect to mosquitto: ```php 2017-07-20 22:57:33.677 [INFO] [t.mqtt.internal.MqttBrokerConnection] - Starting MQTT broker connection 'mqttson' 2017-07-20 22:57:35.679 [ERROR] [t.mqtt.internal.MqttBrokerConnection] - MQTT connection to broker was lost Connection lost (32109) - java.io.EOFException at org.eclipse.paho.client.mqttv3.internal.CommsReceiver.run(CommsReceiver.java:146)[197:org.openhab.io.transport.mqtt:1.10.0] at java.lang.Thread.run(Thread.java:745)[:1.8.0_121] Caused by: java.io.EOFException at java.io.DataInputStream.readByte(DataInputStream.java:267)[:1.8.0_121] at org.eclipse.paho.client.mqttv3.internal.wire.MqttInputStream.readMqttWireMessage(MqttInputStream.java:65)[197:org.openhab.io.transport.mqtt:1.10.0] at org.eclipse.paho.client.mqttv3.internal.CommsReceiver.run(CommsReceiver.java:107)[197:org.openhab.io.transport.mqtt:1.10.0] ... 1 more 2017-07-20 22:57:35.682 [ERROR] [t.mqtt.internal.MqttBrokerConnection] - MQTT connection to 'mqttson' was lost: Connection lost : ReasonCode 32109 : Cause : null 2017-07-20 22:57:35.683 [INFO] [t.mqtt.internal.MqttBrokerConnection] - Starting connection helper to periodically try restore connection to broker 'mqttson' ``` mqtt.cfg: ```php mqttson.url=tcp://localhost:1883 mqttson.clientId=OH2MQTT ``` installed mosquitto via openhabian-conf and “systemctl status mosquitto” says it’s running. no items configured so far - but the broker should still connect, right? are there more settings? i already tried to delete the mqtt binding config via karafe console but the error remains ☹ what am i missing (again)…? ---
**Author:** ![Dim](https://community.openhab.org/user_avatar/community.openhab.org/dim/32/4568_2.png) [@Dim](https://community.openhab.org/u/Dim)\ **Post date:** [July 21, 2017, 4:28pm UTC](https://community.openhab.org/t/mqtt-connection-lost/31993/4 "2017-07-21T16:28:29Z")
> [@narf27](#): > > and “systemctl status mosquitto” says it’s running. > no items configured so far - but the broker should still connect, right? is your broker alive and kicking? use a tool like mqtt.fx to connect to it and try some publish/subscribe stuff to test it out. if it’s working ok: check if you have installed the MQTT Action addon (remove it) otherwise: post your mosquitto.conf (and log) and make sure that the clientID in mqtt.cfg is unique for the connection to the broker. ---
**Author:** ![narf27](https://community.openhab.org/letter_avatar_proxy/v4/letter/n/8797f3/32.png) [@narf27](https://community.openhab.org/u/narf27)\ **Post date:** [July 21, 2017, 6:57pm UTC](https://community.openhab.org/t/mqtt-connection-lost/31993/5 "2017-07-21T18:57:53Z")
**SOLVED!** [quote=“Dim, post:4, topic:31993”] is your broker alive and kicking? use a tool like mqtt.fx to connect to it and try some publish/subscribe stuff to test it out. if it’s working ok: check if you have installed the MQTT Action addon (remove it) [/quote]connected mqtt.fx with Broker Address = openHAB2 ip (where mosquitto runs, too) then on “broker status” i can subscribe to “Mosquitto” or “Hive MQ”, when i subscribe to Mosquitto i can see some messages regarding my sonoff device like: ```php 2017-07-21 20:44:28,519 INFO --- MqttFX ClientModel : messageArrived() with topic: tele/sonoff/LWT 2017-07-21 20:44:28,520 INFO --- MqttFX ClientModel : messageArrived() added: message #5 to topic 'tele/sonoff/LWT' 2017-07-21 20:44:28,569 INFO --- MqttFX ClientModel : messageArrived() with topic: cmnd/sonoff/POWER 2017-07-21 20:44:28,570 INFO --- MqttFX ClientModel : messageArrived() added: message #6 to topic 'cmnd/sonoff/POWER' ``` no idea if that means my broker is alive and kicking… > [@](#): > > otherwise: post your mosquitto.conf (and log) and make sure that the clientID in mqtt.cfg is unique for the connection to the broker. mosquitto.conf seems empty? ```php [20:46:39] openhabian@openHABianPi:~$ cat /etc/mosquitto/mosquitto.conf # Place your local configuration in /etc/mosquitto/conf.d/ # # A full description of the configuration file is at # /usr/share/doc/mosquitto/examples/mosquitto.conf.example pid_file /var/run/mosquitto.pid persistence true persistence_location /var/lib/mosquitto/ log_dest file /var/log/mosquitto/mosquitto.log include_dir /etc/mosquitto/conf.d ``` in /etc/mosquitto/conf.d/ are no files clientID is unique for sure, i have only one MQTT device here (and got a random Client id wth MQTT.fx). **SOLVED!** i’m feeling like forrest gump here… “i am not a very smart man” i configured openHAB with the same clientID as my sonoff device… it’s my first time with mqtt and i thought what openhab conf was supposed to look like 😊 Sorry for the trouble! ---
**Author:** ![Dim](https://community.openhab.org/user_avatar/community.openhab.org/dim/32/4568_2.png) [@Dim](https://community.openhab.org/u/Dim)\ **Post date:** [July 21, 2017, 7:00pm UTC](https://community.openhab.org/t/mqtt-connection-lost/31993/6 "2017-07-21T19:00:10Z")
> [@narf27](#): > > SOLVED! [![](https://img.youtube.com/vi/ljIQo1OHkTI/maxresdefault.jpg "Simple Minds - Alive And Kicking") ](https://www.youtube.com/watch?v=ljIQo1OHkTI) ---
**Author:** ![narf27](https://community.openhab.org/letter_avatar_proxy/v4/letter/n/8797f3/32.png) [@narf27](https://community.openhab.org/u/narf27)\ **Post date:** [July 21, 2017, 9:08pm UTC](https://community.openhab.org/t/mqtt-connection-lost/31993/7 "2017-07-21T21:08:55Z")
well. next problem: mosquitto log: ```javascript 1500670980: mosquitto version 1.4.14 (build date Mon, 10 Jul 2017 23:48:43 +0100) starting 1500670980: Config loaded from /etc/mosquitto/mosquitto.conf. 1500670980: Opening ipv4 listen socket on port 1883. 1500670980: Opening ipv6 listen socket on port 1883. 1500671006: New connection from 192.168.178.160 on port 1883. 1500671006: New client connected from 192.168.178.160 as OH2MQTT (c1, k15, u'DVES_USER'). 1500671044: New connection from 127.0.0.1 on port 1883. 1500671044: New client connected from 127.0.0.1 as openHAB2 (c1, k60). 1500671234: New connection from ::1 on port 1883. 1500671234: New client connected from ::1 as mosqsub|1535-openHABian (c1, k60). 1500671242: Socket error on client mosqsub|1535-openHABian, disconnecting. ``` i get no error message in openHAB2, switch doesnt work: ```php Switch Sonoff_TH16A "Sonoff Test" { mqtt=">[broker:cmnd/OH2MQTT/POWER:command:*:default], <[broker:stat/OH2MQTT/POWER:state:default]" } ``` where’s the client mosqsub|1535-openHABian coming from? ---
**Author:** ![paulo9999](https://community.openhab.org/user_avatar/community.openhab.org/paulo9999/32/58366_2.png) [@paulo9999](https://community.openhab.org/u/paulo9999)\ **Post date:** [July 22, 2017, 1:40am UTC](https://community.openhab.org/t/mqtt-connection-lost/31993/8 "2017-07-22T01:40:21Z")
Hello, I’m following the steps and I am still behind Peter: mqtt.cfg > raspberrypi.url=tcp://10.0.0.101:1883 raspberrypi.clientId=DVES\_A7F83D raspberrypi.user=openhabian raspberrypi.pwd=password at the mqtt.fx I got the following messages (but I didn’t see any topic): > 2017-07-21 22:32:17,511 INFO — MqttFX ClientModel : messageArrived for: > SYS/broker/load/bytes/sent/15min > 2017-07-21 22:32:17,511 INFO — MqttFX ClientModel : messageArrived for: $SYS/broker/load/sockets/15min > 2017-07-21 22:32:17,512 INFO — MqttFX ClientModel : messageArrived for: \> $SYS/broker/load/connections/15min > 2017-07-21 22:32:17,512 INFO — MqttFX ClientModel : messageArrived for: $SYS/broker/messages/received > 2017-07-21 22:32:17,512 INFO — MqttFX ClientModel : messageArrived for: $SYS/broker/messages/sent > 2017-07-21 22:32:17,514 INFO — MqttFX ClientModel : messageArrived for: $SYS/broker/publish/messages/received > 2017-07-21 22:32:17,522 INFO — MqttFX ClientModel : messageArrived for: $SYS/broker/bytes/received > 2017-07-21 22:32:17,545 INFO — MqttFX ClientModel : messageArrived for: $SYS/broker/bytes/sent my mosquitto.cfg: > pid\_file /var/run/mosquitto.pid > persistence true > persistence\_location /var/lib/mosquitto/ > log\_dest file /var/log/mosquitto/mosquitto.log > include\_dir /etc/mosquitto/conf.d > password\_file /etc/mosquitto/passwd > allow\_anonymous false at the mosquitto.log I can see that the connections are opening and closing: > 1500629087: New client connected from 10.0.0.104 as DVES\_A7F83D (c1, k15, u’openhabian’). > 1500629097: New connection from 10.0.0.101 on port 1883. > 1500629097: Client DVES\_A7F83D already connected, closing old connection. > 1500629097: Client DVES\_A7F83D disconnected. > 1500629097: New client connected from 10.0.0.101 as DVES\_A7F83D (c1, k60, u’openhabian’). > 1500629099: New connection from 10.0.0.104 on port 1883. > 1500629099: Client DVES\_A7F83D already connected, closing old connection. > 1500629099: Client DVES\_A7F83D disconnected. > 1500629099: New client connected from 10.0.0.104 as DVES\_A7F83D (c1, k15, u’openhabian’). > 1500629106: Reloading config. If you have any advices I’d really appreciate it!! Paulo ---
**Author:** ![Dim](https://community.openhab.org/user_avatar/community.openhab.org/dim/32/4568_2.png) [@Dim](https://community.openhab.org/u/Dim)\ **Post date:** [July 22, 2017, 4:49am UTC](https://community.openhab.org/t/mqtt-connection-lost/31993/9 "2017-07-22T04:49:14Z")
> [@narf27](#): > > Opening ipv4 listen socket on port 1883. > Opening ipv6 listen socket on port 1883. > New connection from 127.0.0.1 on port 1883. > New connection from ::1 on port 1883. > New client connected from 127.0.0.1 as openHAB2 (c1, k60). > New client connected from ::1 as mosqsub|1535-openHABian (c1, k60). > Socket error on client mosqsub|1535-openHABian, disconnecting. hmmm… it looks like the MQTT binding (?) on the local host is initiating 2 connections towards the broker… (not sure why) One using IPv4 (127.0.0.1) and another one using IPv6 (::1) Try the following: 1. Modify `/etc/openhab2/services/mqtt.cfg` and use: ```auto mqttson.url=tcp://127.0.0.1:1883 mqttson.clientId=openHAB2 ``` (`/etc/hosts` resolves `localhost` to both ipv4 & ipv6 addresses… force the binding to use ipv4 only) 1. Disable the IPv6 listener on the Broker config `/etc/mosquitto/mosquitto.conf`: ```auto listener 1883 0.0.0.0 ``` (check with `netstat -atn |grep 1883` if it is listening only on tcp(4) or also on tcp6) (don’t use `listener 1833 127.0.0.1` since this will not allow remote connections to the broker (e.g. from the Sonoff)) 1. Check `/var/lib/openhab2/config/org/openhab/mqtt.config` for old, stale config entries ---
**Author:** ![Dim](https://community.openhab.org/user_avatar/community.openhab.org/dim/32/4568_2.png) [@Dim](https://community.openhab.org/u/Dim)\ **Post date:** [July 22, 2017, 5:11am UTC](https://community.openhab.org/t/mqtt-connection-lost/31993/10 "2017-07-22T05:11:47Z")
> [@paulo9999](#): > > 1500629097: New client connected from 10.0.0.101 as DVES\_A7F83D (c1, k60, u’openhabian’). > 1500629099: New connection from 10.0.0.104 on port 1883. > 1500629099: Client DVES\_A7F83D already connected, closing old connection. it looks like you are using the same clientID (`DVES_A7F83D`) in 2 client hosts (.101 & .104) ---
**Author:** ![Dim](https://community.openhab.org/user_avatar/community.openhab.org/dim/32/4568_2.png) [@Dim](https://community.openhab.org/u/Dim)\ **Post date:** [July 22, 2017, 5:45am UTC](https://community.openhab.org/t/mqtt-connection-lost/31993/11 "2017-07-22T05:45:17Z")
@ThomDietrich: does this: `mosqsub|1535-openHABian` ring any bells? could `openHABian` be the local hostname? This looks like the an auto-generated clientID (for the IPv6 connection?) using: `mosqsub|` + some random? number (1535) + hostname. I will check the source code of the MQTT binding to see if I find anything… edit: [found](https://www.eclipse.org/paho/files/javadoc/org/eclipse/paho/client/mqttv3/MqttClient.html) something: ```auto public static java.lang.String generateClientId() Returns a randomly generated client identifier based on the current user's login name and the system time. ``` still researching why 2 connections are created 🙂 ---
**Author:** ![Dim](https://community.openhab.org/user_avatar/community.openhab.org/dim/32/4568_2.png) [@Dim](https://community.openhab.org/u/Dim)\ **Post date:** [July 22, 2017, 6:07am UTC](https://community.openhab.org/t/mqtt-connection-lost/31993/12 "2017-07-22T06:07:13Z")
> [@Dim](#): > > hmmm… it looks like the MQTT binding (?) on the local host is initiating 2 connections towards the broker… (not sure why) @narf27: please post the contents of your `/var/lib/openhab2/config/org/openhab/mqtt.config` (don’t delete it … I would like to see the info first to see if there is any entry in there that could be the reason for the 2nd IPv6 based connection) Also: Double check please the log for the 2nd clientId… In theory it should be `mosqsub/1535-openHABian` (not `mosqsub|1535-openHABian`).. not with vertical bar ( | ) but with Slash (/) ---
**Author:** ![Dim](https://community.openhab.org/user_avatar/community.openhab.org/dim/32/4568_2.png) [@Dim](https://community.openhab.org/u/Dim)\ **Post date:** [July 22, 2017, 7:00am UTC](https://community.openhab.org/t/mqtt-connection-lost/31993/13 "2017-07-22T07:00:45Z")
> [@Dim](#): > > still researching why 2 connections are created 🙂 I opened an issue on [[MQTT binding] 2 localhost connections · Issue #5261 · openhab/openhab1-addons · GitHub](https://github.com/openhab/openhab1-addons/issues/5261) to check this… I couldn’t find the answer myself ---
**Author:** ![narf27](https://community.openhab.org/letter_avatar_proxy/v4/letter/n/8797f3/32.png) [@narf27](https://community.openhab.org/u/narf27)\ **Post date:** [July 22, 2017, 7:10am UTC](https://community.openhab.org/t/mqtt-connection-lost/31993/14 "2017-07-22T07:10:02Z")
goood morning! made the changes as indicated: [quote]1) Modify /etc/openhab2/services/mqtt.cfg and use: mqttson.url=tcp://127.0.0.1:1883 mqttson.clientId=openHAB2 (/etc/hosts resolves localhost to both ipv4 & ipv6 addresses… force the binding to use ipv4 only) 1. Disable the IPv6 listener on the Broker config /etc/mosquitto/mosquitto.conf: listener 1883 0.0.0.0 (check with netstat -atn |grep 1883 if it is listening only on tcp(4) or also on tcp6) (don’t use listener 1833 127.0.0.1 since this will not allow remote connections to the broker (e.g. from the Sonoff))[/quote] netstat before: ```php [08:58:34] openhabian@openHABianPi:~$ netstat -atn |grep 1883 tcp 0 0 0.0.0.0:1883 0.0.0.0:* LISTEN tcp 0 0 127.0.0.1:1883 127.0.0.1:59416 ESTABLISHED tcp 0 0 192.168.178.173:1883 192.168.178.160:12389 ESTABLISHED tcp6 0 0 :::1883 :::* LISTEN tcp6 0 0 127.0.0.1:59416 127.0.0.1:1883 ESTABLISHED ``` netstat afterwards: ```php [09:03:58] openhabian@openHABianPi:~$ netstat -atn |grep 1883 tcp 0 0 0.0.0.0:1883 0.0.0.0:* LISTEN tcp 0 0 192.168.178.173:1883 192.168.178.160:22232 ESTABLISHED tcp 0 0 127.0.0.1:1883 127.0.0.1:38182 ESTABLISHED tcp6 0 0 127.0.0.1:38182 127.0.0.1:1883 ESTABLISHED ``` this is mqtt.config ```php [08:59:55] openhabian@openHABianPi:~$ cat /var/lib/openhab2/config/org/openhab/mqtt.config mqttson.clientId="openHAB2" mqttson.url="tcp://127.0.0.1:1883" service.pid="org.openhab.mqtt" ``` > [@Dim](#): > > Also: Double check please the log for the 2nd clientId… In theory it should be mosqsub/1535-openHABian (not mosqsub|1535-openHABian).. not with vertical bar ( | ) but with Slash (/) it’s the verticatl bar… the number changes, here’s the log after said changes and reboot: ```javascript 1500706908: mosquitto version 1.4.14 (build date Mon, 10 Jul 2017 23:48:43 +0100) starting 1500706908: Config loaded from /etc/mosquitto/mosquitto.conf. 1500706908: Opening ipv4 listen socket on port 1883. 1500706935: New connection from 192.168.178.160 on port 1883. 1500706935: New client connected from 192.168.178.160 as OH2MQTT (c1, k15, u'DVES_USER'). 1500706972: New connection from 127.0.0.1 on port 1883. 1500706972: New client connected from 127.0.0.1 as openHAB2 (c1, k60). 1500707208: New connection from 127.0.0.1 on port 1883. 1500707208: New client connected from 127.0.0.1 as mosqsub|1542-openHABian (c1, k60). 1500707211: Socket error on client mosqsub|1542-openHABian, disconnecting. ``` are the first numbers here a timestamp? ---
**Author:** ![Dim](https://community.openhab.org/user_avatar/community.openhab.org/dim/32/4568_2.png) [@Dim](https://community.openhab.org/u/Dim)\ **Post date:** [July 22, 2017, 7:11am UTC](https://community.openhab.org/t/mqtt-connection-lost/31993/15 "2017-07-22T07:11:35Z")
> [@narf27](#): > > 1500706972: New connection from 127.0.0.1 on port 1883. > 1500706972: New client connected from 127.0.0.1 as openHAB2 (c1, k60). > 1500707208: New connection from 127.0.0.1 on port 1883. > 1500707208: New client connected from 127.0.0.1 as mosqsub|1542-openHABian (c1, k60). > 1500707211: Socket error on client mosqsub|1542-openHABian, disconnecting. good morning! ok… please post the contents of `/var/lib/openhab2/config/org/openhab/mqtt.config` ---
**Author:** ![narf27](https://community.openhab.org/letter_avatar_proxy/v4/letter/n/8797f3/32.png) [@narf27](https://community.openhab.org/u/narf27)\ **Post date:** [July 22, 2017, 7:12am UTC](https://community.openhab.org/t/mqtt-connection-lost/31993/16 "2017-07-22T07:12:28Z")
it’s in the middle of my previous post! ---
**Author:** ![Dim](https://community.openhab.org/user_avatar/community.openhab.org/dim/32/4568_2.png) [@Dim](https://community.openhab.org/u/Dim)\ **Post date:** [July 22, 2017, 7:17am UTC](https://community.openhab.org/t/mqtt-connection-lost/31993/17 "2017-07-22T07:17:26Z")
oops 🙂 saw it is there any other process running locally on the machine that would initiate a new connection to the broker? (except openHAB… example: owntracks recorder or something similar) ---
**Author:** ![Dim](https://community.openhab.org/user_avatar/community.openhab.org/dim/32/4568_2.png) [@Dim](https://community.openhab.org/u/Dim)\ **Post date:** [July 22, 2017, 7:21am UTC](https://community.openhab.org/t/mqtt-connection-lost/31993/18 "2017-07-22T07:21:35Z")
> [@narf27](#): > > are the first numbers here a timestamp? Yes, use: [https://www.epochconverter.com/](https://www.epochconverter.com/) ---
**Author:** ![narf27](https://community.openhab.org/letter_avatar_proxy/v4/letter/n/8797f3/32.png) [@narf27](https://community.openhab.org/u/narf27)\ **Post date:** [July 22, 2017, 7:22am UTC](https://community.openhab.org/t/mqtt-connection-lost/31993/19 "2017-07-22T07:22:25Z")
> [@Dim](#): > > is there any other process running locally on the machine that would initiate a new connection to the broker? (except openHAB… example: owntracks recorder or something similar) not that i would know of. there’s a /etc/openhab2/services/mqtt-eventbus.cfg, but i don’t think that would make a connection? how can i check for anoter process? noticed a new connection (and disconnect) - see last 3 linkes ```php 1500706890: mosquitto version 1.4.14 terminating 1500706908: mosquitto version 1.4.14 (build date Mon, 10 Jul 2017 23:48:43 +0100) starting 1500706908: Config loaded from /etc/mosquitto/mosquitto.conf. 1500706908: Opening ipv4 listen socket on port 1883. 1500706935: New connection from 192.168.178.160 on port 1883. 1500706935: New client connected from 192.168.178.160 as OH2MQTT (c1, k15, u'DVES_USER'). 1500706972: New connection from 127.0.0.1 on port 1883. 1500706972: New client connected from 127.0.0.1 as openHAB2 (c1, k60). 1500707208: New connection from 127.0.0.1 on port 1883. 1500707208: New client connected from 127.0.0.1 as mosqsub|1542-openHABian (c1, k60). 1500707211: Socket error on client mosqsub|1542-openHABian, disconnecting. 1500707619: New connection from 127.0.0.1 on port 1883. 1500707619: New client connected from 127.0.0.1 as mosqsub|1730-openHABian (c1, k60). 1500707800: Socket error on client mosqsub|1730-openHABian, disconnecting. ``` ---
**Author:** ![Dim](https://community.openhab.org/user_avatar/community.openhab.org/dim/32/4568_2.png) [@Dim](https://community.openhab.org/u/Dim)\ **Post date:** [July 22, 2017, 7:26am UTC](https://community.openhab.org/t/mqtt-connection-lost/31993/20 "2017-07-22T07:26:12Z")
1500706972 = GMT: Saturday, July 22, 2017 7:02:52 AM (openHAB2 client connects) 1500707208 = GMT: Saturday, July 22, 2017 7:06:48 AM (mosqsub|1730-openHABian client connects) almost 4 mins delta… strange then… after 3 seconds… disconnection happens due to Socket error for client `mosqsub|1730-openHABian` 1500707211 = GMT: Saturday, July 22, 2017 7:06:51 AM and then… 1500707619 = GMT: Saturday, July 22, 2017 7:13:39 AM client `mosqsub|1730-openHABian` tries to reconnect (and gets busted again 🙂) ..but… this time after almost 3 minutes… 1500707800 = GMT: Saturday, July 22, 2017 7:16:40 AM (2nd socket error) > [@narf27](#): > > there’s a /etc/openhab2/services/mqtt-eventbus.cfg, but i don’t think that would make a connection? I believe that the event-bus uses the main mqtt connection (it doesn’t establish a new one). Do you have anything configured in there? > [@narf27](#): > > how can i check for another process? ```auto lsof -i :1883 ``` …but if it is disconnected… it won’t show up [Next page](https://community.openhab.org/t/mqtt-connection-lost/31993.md?page=2)