| Re: [mosquitto-dev] Receiving a disconnection (1) when connecting to broker |
Your keepalive is 10, and you're getting disconnected every 20
seconds....
.... You're probably not calling mosquitto_loop/loop_start/loop_forever and so no network traffic is actually getting handled.
Cheers,
Karl P
Brent Sink <brents_3@xxxxxxxxxxx> wrote:
> Hello,
>
>
> I am using the mosquittopp library and I'm getting some strange
> disconnections that is returning the error code 1. Looking at
> the mosquitto.h file, it looks as this is a No Memory error,
> which does not make sense. Looking at the memory usage of my
> application and the mosquitto service there does not appear to
> be any issue (my application is using 1.2% of the memory, and
> mosquitto is using 0.4%).
>
>
> I was wondering if there is any more documentation on what
> typically causes this error?
>
>
> Here is how I'm creating an instance... I'm passing in NULL as
> the _id in order to have the library use a random client id.
>
> local_server = new mqtt(NULL, "localhost", 1883, 10);
>
>
> // Constructor
>
> mqtt::mqtt(char *_id, QString _host, int _port, int _keepalive)
> : mosquittopp(_id)
> {
> // Initialization for mosquitto
> mosqpp::lib_init();
>
> // Basic configuration setup for mqtt class
> this->keepalive = _keepalive;
> this->id = _id;
> this->port = _port;
> this->host = _host;
>
> this->reconnect_delay_set(5, 30, true);
>
> // Non blocking connection to broker request
> connect_async(host.toStdString().c_str(), port, keepalive);
>
> // Start thread managing connection / publish / subscribe
> loop_start();
> }
>
> Here is my on_disconnection code:
> void mqtt::on_disconnect(int rc)
> {
> qDebug() << ">> mqtt - disconnection(" << rc << ")" << host;
> emit disconnected();
> }
>
>
> I'm seeing disconnects happen every 20 seconds or so. But
> sometimes it works without any problems and I'm having a hard
> time tracking down the root cause. myapp.service - Run the
> /usr/bin/myapp.sh script
> Loaded: loaded (/etc/systemd/system/myapp.service; disabled; vendor preset:
> Active: active (running) since Wed 2016-11-23 20:44:00 UTC; 11min ago
> Main PID: 1331 (myapp)
> CGroup: /system.slice/myapp.service
> ??1331 /opt/myapp/bin/myapp
>
> Nov 23 20:52:16 ubuntu myapp[1331]: >> mqtt - connected with
> server "localhost" Nov 23 20:53:42 ubuntu myapp[1331]: >> mqtt
> - disconnection( 1 ) "localhost" Nov 23 20:53:42 ubuntu
> myapp[1331]: >> mqtt - disconnection( 1 ) "localhost" Nov 23
> 20:53:52 ubuntu myapp[1331]: >> mqtt - disconnection( 1 )
> "localhost" Nov 23 20:54:12 ubuntu myapp[1331]: >> mqtt -
> disconnection( 1 ) "localhost" Nov 23 20:54:32 ubuntu
> myapp[1331]: >> mqtt - disconnection( 1 ) "localhost" Nov 23
> 20:54:52 ubuntu myapp[1331]: >> mqtt - disconnection( 1 )
> "localhost" Nov 23 20:55:12 ubuntu myapp[1331]: >> mqtt -
> disconnection( 1 ) "localhost" Nov 23 20:55:22 ubuntu
> myapp[1331]: >> mqtt - connected with server "localhost" lines
> 1-17/17 (END)
>
> Does anyone have any insight to why this may be happening? Is
> there something I'm doing wrong in my code? Let me know if you
> need to see more of the code. Thanks!
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