Can not connect to mqtt broker about frost-server HOT 6 CLOSED

Without information about your setup, so we can reproduce your problem, there is nothing anyone can do.

• Which version are you using
• Did you enable MQTT?
• Did it work before?
• Is there something else listening on port 1883 (use netstat)

from frost-server.

With your current version i can connect via mqtt but i get the following error message:
09:14:50.251 [InternalBusSend-Thread] INFO d.f.i.i.s.m.MqttMessageBus - paho-client connecting to broker: tcp://mosquitto:1883
web_1 | 09:14:50.364 [InternalBusSend-Thread] ERROR d.f.i.i.s.m.MqttMessageBus - Failed to connect to broker: tcp://mosquitto:1883
web_1 | 09:14:50.365 [InternalBusSend-Thread] ERROR d.f.i.i.s.m.MqttMessageBus -
web_1 | org.eclipse.paho.client.mqttv3.MqttException: MqttException
web_1 | at org.eclipse.paho.client.mqttv3.internal.ExceptionHelper.createMqttException(ExceptionHelper.java:38)
web_1 | at org.eclipse.paho.client.mqttv3.internal.ClientComms$ConnectBG.run(ClientComms.java:715)
web_1 | at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
web_1 | at java.util.concurrent.FutureTask.run(FutureTask.java:266)
web_1 | at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
web_1 | at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
web_1 | at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
web_1 | at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
web_1 | at java.lang.Thread.run(Thread.java:748)
web_1 | Caused by: java.net.UnknownHostException: mosquitto
web_1 | at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:184)
web_1 | at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
web_1 | at java.net.Socket.connect(Socket.java:589)
web_1 | at org.eclipse.paho.client.mqttv3.internal.TCPNetworkModule.start(TCPNetworkModule.java:84)
web_1 | at org.eclipse.paho.client.mqttv3.internal.ClientComms$ConnectBG.run(ClientComms.java:701)
web_1 | ... 7 common frames omitted
web_1 | 09:14:50.365 [InternalBusSend-Thread] ERROR d.f.i.i.s.m.MqttMessageBus - Failed to publish message to bus.
web_1 | org.eclipse.paho.client.mqttv3.MqttException: Client is not connected
web_1 | at org.eclipse.paho.client.mqttv3.internal.ExceptionHelper.createMqttException(ExceptionHelper.java:31)
web_1 | at org.eclipse.paho.client.mqttv3.internal.ClientComms.sendNoWait(ClientComms.java:199)
web_1 | at org.eclipse.paho.client.mqttv3.MqttAsyncClient.publish(MqttAsyncClient.java:1355)
web_1 | at org.eclipse.paho.client.mqttv3.MqttClient.publish(MqttClient.java:583)
web_1 | at org.eclipse.paho.client.mqttv3.MqttClient.publish(MqttClient.java:575)
web_1 | at de.fraunhofer.iosb.ilt.sta.messagebus.MqttMessageBus.handleMessageSent(MqttMessageBus.java:245)
web_1 | at de.fraunhofer.iosb.ilt.sta.messagebus.MqttMessageBus.lambda$init$0(MqttMessageBus.java:105)
web_1 | at de.fraunhofer.iosb.ilt.sta.util.ProcessorHelper$Processor.run(ProcessorHelper.java:107)
web_1 | at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
web_1 | at java.util.concurrent.FutureTask.run(FutureTask.java:266)
web_1 | at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
web_1 | at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
web_1 | at java.lang.Thread.run(Thread.java:748)

With our version
https://github.com/image357/SensorThingsServer/tree/teco
we can not connect to mqtt broker at all

Regards

Johannes

from frost-server.

I'm guessing you're using the MQTTP package or the FROST-Server docker image. The default setting for the message bus was incorrect. I've fixed it.
You can also explicitly set the option
bus.busImplementationClass to value de.fraunhofer.iosb.ilt.sta.messagebus.InternalMessageBus

Unless you're using the HTTP package, or the FROST-Server-HTTP docker image, in that case you're not running an MQTT server at all.

See https://github.com/FraunhoferIOSB/FROST-Server/blob/master/docs/architecture-packages.adoc

from frost-server.

One more question: which .war files do we have to install into the tomcat server? What do we have to change within our implementation? In your version the bug is fixed, but in our version we still can't connect

from frost-server.

Did you re-build your docker images?
Which war you need depends on the setup you want. If in doubt, take the MQTTP one, since it contains everything.

from frost-server.

ok, that works.

Thank you for your help!

Regards

Johannes

from frost-server.