Mqtt: get rid of old config

[gerrit (gerrit oehlmann)]

Hi there,

I was trying to get my mqtt<->oh2 working. While I was trying to find out what’s wrong, I decided to rename ‘broker’ in mqtt.cfg. I used to be:

broker.url=tcp://localhost:1883
broker.clientId=openhab2

And I changed it to:

oh2broker.url=tcp://localhost:1885
oh2broker.clientId=openhab2

I now get a lot of error messages like that:
15:57:09.305 [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:138)[215:org.openhab.io.transport.mqtt:1.9.0.201701200211]
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:56)[215:org.openhab.io.transport.mqtt:1.9.0.201701200211]
at org.eclipse.paho.client.mqttv3.internal.CommsReceiver.run(CommsReceiver.java:100)[215:org.openhab.io.transport.mqtt:1.9.0.201701200211]
… 1 more
15:57:09.311 [ERROR] [t.mqtt.internal.MqttBrokerConnection] - MQTT connection to ‘oh2broker’ was lost: Connection lost : ReasonCode 32109 : Cause : null

and also:
15:57:19.357 [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:138)[215:org.openhab.io.transport.mqtt:1.9.0.201701200211]
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:56)[215:org.openhab.io.transport.mqtt:1.9.0.201701200211]
at org.eclipse.paho.client.mqttv3.internal.CommsReceiver.run(CommsReceiver.java:100)[215:org.openhab.io.transport.mqtt:1.9.0.201701200211]
… 1 more
15:57:19.363 [ERROR] [t.mqtt.internal.MqttBrokerConnection] - MQTT connection to ‘broker’ was lost: Connection lost : ReasonCode 32109 : Cause : null

I rebooted the system a couple of times, I uninstalled the binding and installed it again.
It seems that both versions of the config got somehow persisted …

Any ideas how to solve this problem?

Best

[sihui]

Help, I'm ready to give up

Please be aware of a big potential gotcha: If you define parameters in a .cfg file, but later change the key or comment out the key (to the left of the = sign), the old key and value remains in the configuration stored in the server. This can wreak havoc and lead to many otherwise inexplicable problems. Users expect, quite reasonably, that the old key no longer mentioned in the .cfg file disappears from the configuration, but it doesn’t. This is particularly irksome when you use a 1.x bindi…

[gerrit (gerrit oehlmann)]

Good info … but I’m past that. What can I do now?

[watou (John Cocula)]

When I’ve seen the EOFException working with MQTT from openHAB, my cause was that the clientId I provided in the configuration was not unique among all of the broker’s clients.

[gerrit (gerrit oehlmann)]

Hi, I’ve changed the clientID, but it didn’t help. I’ve read this: MQTT config under OH2 but my config-folder is not present at this location. Any idea where else it could be?

[sihui]

If it is not under
/var/lib/openhab2/config/org/openhab/mqtt.config
you probably have a manual install and in this case the file is located here:
/openhab2/userdata/config/org/openhab/mqtt.config

[gerrit (gerrit oehlmann)]

Okay, another restart, defining the old name of the broker and the new name and giving them different clientIds did the trick. No error messages anymore. I guess that the old descriptor is now active as well, not nice, but what can we do…