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Re: [mosquitto-dev] Problems using Mosquitto Broker

how did you find the packet loss? with err log like "Outgoing messages are being dropped for client xxx"?

otherwise, the console log could not be used as the evidence I think😉


From: mosquitto-dev-bounces@xxxxxxxxxxx <mosquitto-dev-bounces@xxxxxxxxxxx> on behalf of Tatsuzo Osawa <tatsuzo.osawa@xxxxxxxxx>
Sent: Wednesday, January 17, 2018 21:25
To: General development discussions for the mosquitto project
Subject: Re: [mosquitto-dev] Problems using Mosquitto Broker
 
Understood.
You ran a mosquitto broker on Windows.
Sorry I have no expertise of mosquitto on Windows.

BR/Tatsuzo

2018-01-17 21:31 GMT+09:00 michele conficconi <conficconimichele@xxxxxxxxx>:
> Hi Tatsuzo,
> with the term "window" I just meant the tab of the "command promt", as the
> one attached here.
> If I minimize this tab while exchanging data between the 2 PLC I have no
> problem and everything works just fine. However, expanding this tab (I
> notice a spike in the CPU usage) the subscriber starts losing data.
>
> Regards,
> Michele.
>
> 2018-01-17 13:09 GMT+01:00 Tatsuzo Osawa <tatsuzo.osawa@xxxxxxxxx>:
>>
>> Hi Micheie,
>>
>> Could you explain more about the window? It's not a term of MQTT
>> protocol nor mosquitoo. Maybe it's a term of beckhoff PLC.
>> In addition, could you show the debug logs of mosquitto broker?
>>
>> Regards,
>> Tatsuzo
>>
>> 2018-01-17 18:07 GMT+09:00 michele conficconi
>> <conficconimichele@xxxxxxxxx>:
>> > Good morning,
>> > I'm developing a thesis project regarding machine to machine
>> > communication
>> > through MQTT protocol, and I'm using mosquitto as broker along with 2
>> > beckhoff PLCs.
>> >
>> > When dealing with encrypted communication (I'm using TLS pre shared key
>> > to
>> > exploit security), I have to properly configure the broker to let the 2
>> > PLC
>> > exchange data. And this is fine for me: I'm able to send and receive
>> > information using the MQTT libraries available from TWINCAT (Beckhoff
>> > software tool).
>> >
>> > I'd like also to get the packet loss depending on the speed of the
>> > Publisher
>> > and Subscriber and on the payload I'm sending.
>> >
>> > Doing some tests, I've notice that I've no packet loss in my
>> > communication,
>> > however if I enlarge the command window while the 2 plc are exchanging
>> > data
>> > (I can see that the 2 plc are communicating thanks to the messages in
>> > the
>> > window, as show in figure attached), I start losing packets.
>> > My question is:
>> > Is that normal? Is this a problem of the broker o may be the plc is not
>> > so
>> > powerful and it struggles to show also those messages? Beacuse I've
>> > noticed
>> > a spike of CPU usage, when enlarging the command window, which goes
>> > immediatly to 70/75%.
>> >
>> > I look forward to hear from you soon.
>> >
>> > Best regards,
>> > Michele
>> >
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