MQSeries.net :: View topic - MQTT v3.1.1 on MQ 8.0.0.8

MQSeries.net

Tech Exchange

Education

Certifications

Library

Info Center

SupportPacs

FAQÂ Â

Usergroups

RSS Feed - WebSphere MQ Support

RSS Feed - Message Broker Support

MQSeries.net Forum Index » IBM MQ Telemetry / Low Latency Messaging / Everyplace » MQTT v3.1.1 on MQ 8.0.0.8

MQTT v3.1.1 on MQ 8.0.0.8

« View previous topic :: View next topic »

Author

Message

souciance

Posted: Tue Jan 23, 2018 10:58 am Post subject: MQTT v3.1.1 on MQ 8.0.0.8

Disciple

Joined: 29 Jun 2010
Posts: 162

Hello,

According to the docs the latest fixpack should support MQTT 3.1.1. However when connect via a java client using Paho we simply get:

Code:

Exception in thread "main" Connection lost (32109) - java.io.EOFException
at org.eclipse.paho.client.mqttv3.internal.CommsReceiver.run(CommsReceiver.java:181)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:483)
at java.util.concurrent.FutureTask.run(FutureTask.java:274)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:190)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:304)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1157)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:627)
at java.lang.Thread.run(Thread.java:809)
Caused by: java.io.EOFException
at java.io.DataInputStream.readByte(DataInputStream.java:279)
at org.eclipse.paho.client.mqttv3.internal.wire.MqttInputStream.readMqttWireMessage(MqttInputStream.java:92)
at org.eclipse.paho.client.mqttv3.internal.CommsReceiver.run(CommsReceiver.java:133)
... 7 more

If we switch to 3.1 then everything works ago. Why doesn't 3.1.1 work? Do we need to enable some parameter on the MQTT broker?

souciance

Posted: Tue Jan 23, 2018 1:09 pm Post subject:

Disciple

Joined: 29 Jun 2010
Posts: 162

I managed to find the root cause. It was pretty ridiculous.

We had created the telemetry channel when we were still on MQ 8.0.0.0. Back then it had only support for 3.1.

After we upgraded to 8.0.0.8 we expected the support for 3.1 to occur automatically.

But no, since the channel was created when it was on 8.0.0.0 you couldn't configure it to support 3.1.1.

The solution was to delete the channel and create a new one.

This was evident by checking the mq logs and view the channel details via runmqsc.

bruce2359

Posted: Tue Jan 23, 2018 7:06 pm Post subject:

Poobah

Joined: 05 Jan 2008
Posts: 8328
Location: US: west coast, almost. Otherwise, enroute.

Moved to telemetry forum.
_________________
There are two types of people in this world:
1) Those that can extrapolate from incomplete data

Display posts from previous:

Page 1 of 1

MQSeries.net Forum Index » IBM MQ Telemetry / Low Latency Messaging / Everyplace » MQTT v3.1.1 on MQ 8.0.0.8

Jump to:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum

Protected by Anti-Spam ACP