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Re: [paho-dev] Disconnect when receiving messages

Activity has a method called runOnUiThread(runnable)

Den 30 nov 2012 11:44 skrev "Sergio Torassa" <sergio.torassa@xxxxxxxxxxx>:
Thanks to both.
@petteri: I also faced this problem and MqttClient.connect() and MqttTopic.publish are now on their own threads.
But how can you bind the reception of the message on a thread?
I simply defined my Activity as "implements MqttCallback" and then I added MqttClient.setCallback(MyActivity.this). Is it enough to put also this code into its own thread or have I to do anything more?


From: petteri.hyttinen@xxxxxxxxx
Date: Fri, 30 Nov 2012 11:10:49 +0100
To: paho-dev@xxxxxxxxxxx
Subject: Re: [paho-dev] Disconnect when receiving messages

I had the same problem before! 
The problem for me was that you can not run network operations in the  Main thread (UI thread). You must make sure that Paho operation are performed in different thread or you will be disconnected when network traffic occurs.

// Petteri

30 nov 2012 kl. 11:04 skrev Dave Locke <locke@xxxxxxxxxx>:

the current version of the Paho Java should work on Android with the caveats re location of where messages are stored.  I have not come across the problem you mention where the client is disconnected when a message arrives.  Does the error occur before message arrived is called, during or after control is returned from it?  

There are some updates in progress to both fix a number of problems and add some enhancements to make it more friendly to Android. The update will also have been through a rigorous test on Android. Hoping to have this available in Dec.  

All the best


From:        Sergio Torassa <sergio.torassa@xxxxxxxxxxx>
To:        "paho-dev@xxxxxxxxxxx" <paho-dev@xxxxxxxxxxx>,
Date:        30/11/2012 09:30
Subject:        [paho-dev] Disconnect when receiving messages
Sent by:        paho-dev-bounces@xxxxxxxxxxx

Hello everybody,

I'm trying to use the mqtt paho library in an Android application for usage with a mosquitto server.
I eventually was able to solve all the issues wrt write permissions on Android directories, uses-permissions in the manifest and so on, but now each time the device receives a message, the client is disconnected with a message on the mosquitto server like this

Socket read error on client 0001, disconnecting.

Then the client has to reconnect and possibly to re-subscribe to all its topics.
My workaround is to re-connect and re-subscribe in the MqttCallback.ConnectionLost, but it is of course only a workaround.

Has anybody found a similar issue in implementing paho library?
If needed I can provide my code, but it is a very basic implementation of the paho client.

I add that the same issue is not present when I connect via other clients (e.g., mosquitto).
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