mqtt-spy looses messages on a subscription ?

[Maarten Ligtenberg]

Hi,

I'm testing our implementation of sending messages to a mosquitto broker using the paho client library. In that testing I'm using mqqt-spy to check whether all sent messages actually arrive at the broker.

What I seem to have noticed is that mqqt-spy (0.5.4) misses messages on the subscription, where the mosquitto_sub client does not miss any messages on the same subscription.

For testing I'm sending 1000 messages in very quick succession. QoS=1

1000 messages actually arrive at the mosquitto_sub client.
Less than 1000 messages arrive at the mqtt-spy client (subscription also set to QoS=1). This varies per run of the test. I've also seen all messages arrive, but also 50 or more messages missing.

Any idea ? Has this been noticed before ?

Regards,
Maarten

[Maarten Ligtenberg]

Copied to eclipse/paho.mqtt-spy#18
As that now seems to be the maintained project.

[Kamil Baczkowicz]

@maartenl945 correct - I will close this one off.