mosquitto-users team mailing list archive

[Roger Light <roger@xxxxxxxxxx>]

Hi Marcus,

It is a bug. Thanks for the very detailed description, it made it easy
to figure out. I guessed what the problem was before I finished
recreating it actually, so I'm sorry it was hard for you to find where
things weren't working.

I've pushed a fix on the 1.3 branch which should be very easy to use on 1.2.3:

https://bitbucket.org/oojah/mosquitto/commits/a8e563fc0f53873500d31f217133540504735cdc

Thanks!

Roger


On Mon, Dec 9, 2013 at 3:23 PM, Marcus Rejås <marcus.rejas@xxxxxxxxxx> wrote:
> Problem: Messages are not being retained under some circumstances when
> persistence is being used.
>
> Setup:
>
> Mosquitto 1.2.3
>
> BROKER A   <-- BRIDGE -->  BROKER B
>
> The bridge is initiated from Broker B.
>
> Config A
>
>   persistence true
>   persistence_file mosquitto-A.db
>   persistence_location /tmp/
>   autosave_interval 3600
>
>   port 1883
>
>
> Config B
>
>   persistence true
>   persistence_file mosquitto-B.db
>   persistence_location /tmp/
>   autosave_interval 3600
>
>   port 1884
>
>   connection A
>   address 127.0.0.1:1883
>   topic # both
>
>
> When starting with no persistence files it works as we expects.
>
> Setting a retained message on either A or B makes it retained on both
> brokers.
>
> Setting on A and B
>
>   $ mosquitto_pub -p 1883 -t retainedA -m test -r
>   $ mosquitto_pub -p 1884 -t retainedB -m test -r
>
> Verifying that the messages are retained.
>
>   $ mosquitto_sub -p 1883 -t \# -v
>   retainedA test
>   retainedB test
>
>   $ mosquitto_sub -p 1884 -t \# -v
>   retainedA test
>   retainedB test
>
> Works as expected.
>
> Removing the retained messages by sending a null-message to the topics
> also works as expected.
>
> But, restarting the brokers (making them read the persistence database)
> makes it behave different.
>
>   $ mosquitto_pub -p 1883 -t retainedA -m test -r
>   $ mosquitto_pub -p 1884 -t retainedB -m test -r
>
>   $ mosquitto_sub -p 1883 -t \# -v
>   retainedA test
>   retainedB test
>
>   $ mosquitto_sub -p 1884 -t \# -v
>   retainedB test
>
> Only the retained message set directly on B is set on B. Also remove
> retained topics on B via the bridge does not work.
>
> This was little hard to find since it only occurs after restarting with
> a persistence file present.
>
> Is this a bug or did we do something wrong?
>
> Regards
>
> Marcus
>
> --
> Marcus Rejås
> ALLEATO
> Tel. +46 176 250103
> Mobilnr: +46 70 266 79 85
> marcus.rejas@xxxxxxxxxx
> http://www.alleato.se
>
> --
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