Re: [mosquitto-dev] One of my clients is not receiving messages on a cer

[Roger Light <roger@xxxxxxxxxx>]

Hi Mickael,

Looking at the logs I agree there seems to be no reason why it
shouldn't work. Does the problem exist for just that topic, just that
client or some other combination?

If you've had success with removing the persistence file in the past,
how would you feel about sending it to me in private to have a look
at?

Cheers,

Roger


On 3 July 2017 at 17:52, Mickael Mattox <mickael.mattox@xxxxxxxxxxxxx> wrote:
> I'm using mosquitto in a production system with 15 clients and 1 broker.
> All clients use the same version of my software.  Today one of my clients
> stopped receiving one of the message from the broker on a specific topic.  I
> look in the broker logs and I see another client posting to this topic but
> the broker doesn't send it to the client.
>
> I don't know how to troubleshoot this.  If anyone has some suggestions to
> debug it, it would be very helpful.  All clients run the same software,
> which hasn't changed in over a week, and I've rebooted the client.  The
> client was receiving this message fine the previous business day.  So I'm
> not sure what else to try.  I have had a similar problem twice, in test
> environments, and I deleted the mosquitto database and then it worked again.
> But I hesitate to do that in production.
>
> Here is an example from the logs, the message the client does not receive is
> requestKioskData from backoffice.
>
> Here the client subscribes:
>
> 1499099308: Received SUBSCRIBE from CLIENT-123
> 1499099308: kiosk/CLIENT-123/sync/requestKioskData (QoS 2)
> 1499099308: CLIENT-123 2 kiosk/CLIENT-123/sync/requestKioskData
> 1499099308: Sending SUBACK to CLIENT-123
>
> 1499099308: Received SUBSCRIBE from CLIENT-123
> 1499099308: kiosk/CLIENT-123/checkId (QoS 2)
> 1499099308: CLIENT-123 2 kiosk/CLIENT-123/checkId
> 1499099308: Sending SUBACK to CLIENT-123
>
> 1499099309: Received PUBLISH from CLIENT-123 (d0, q1, r1, m33609,
> 'pops/kiosk/CLIENT-123/state', ... (84 bytes))
> 1499099309: Sending PUBACK to CLIENT-123 (Mid: 33609)
>
> 1499099309: Sending PUBLISH to backoffice (d0, q1, r0, m6844,
> 'pops/kiosk/CLIENT-123/state', ... (84 bytes))
>
> Here the backoffice sends a message to the client:
> 1499099309: Received PUBLISH from backoffice (d0, q2, r0, m40327,
> 'kiosk/CLIENT-123/sync/requestKioskData', ... (171 bytes))
>
> But the rest of the log just has the ping requests:
>
> 1499099310: Received PINGREQ from Updater-CLIENT-123
> 1499099310: Sending PINGRESP to Updater-CLIENT-123
> 1499099321: Received PINGREQ from Updater-CLIENT-123
> 1499099321: Sending PINGRESP to Updater-CLIENT-123
> 1499099328: Sending PUBREC to CLIENT-123 (Mid: 27313)
> 1499099331: Received PINGREQ from Updater-CLIENT-123
> 1499099331: Sending PINGRESP to Updater-CLIENT-123
> 1499099340: Received PINGREQ from Updater-CLIENT-123
> 1499099340: Sending PINGRESP to Updater-CLIENT-123
> 1499099349: Sending PUBREC to CLIENT-123 (Mid: 27313)
> 1499099351: Received PINGREQ from Updater-CLIENT-123
> 1499099351: Sending PINGRESP to Updater-CLIENT-123
> 1499099360: Received PINGREQ from Updater-CLIENT-123
> 1499099360: Sending PINGRESP to Updater-CLIENT-123
> 1499099369: Received PINGREQ from CLIENT-123
> 1499099369: Sending PINGRESP to CLIENT-123
> 1499099370: Sending PUBREC to CLIENT-123 (Mid: 27313)
> 1499099370: Received PINGREQ from Updater-CLIENT-123
>
>
> Thanks,
> Mickael
>
>
>
>
>
>
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