why broker reloading config every day?

This shouldn't happen. What version of mosquitto are you running?

Thanks for your response.

The version is 1.3.1

and my logging config like that :
log_dest file /var/log/mosquitto/mosquitto.log
log_dest topic
log_type error
log_type warning
log_type notice
log_type information
log_type all
connection_messages true
log_timestamp true

The following is a log message：
in mosquitto.log.1 is end of: "1402352707: Reloading config."
in mosquitto.log.2 is end of: "1402266307: Reloading config."
in mosquitto.log.3 is end of: "1402179907: Reloading config."
in mosquitto.log.4 is end of: "1402093507: Reloading config."
...

Ah right, yes of course. Logrotate sends SIGHUP to mosquitto every day
so that it closes and reopens the log file. This also triggers
reloading of the config file.

On Fri, Jun 13, 2014 at 5:16 AM, adam dong
<email address hidden> wrote:
> Question #250141 on mosquitto changed:
> https://answers.launchpad.net/mosquitto/+question/250141
>
> Status: Needs information => Open
>
> adam dong gave more information on the question:
> Thanks for your response.
>
> The version is 1.3.1
>
> and my logging config like that :
> log_dest file /var/log/mosquitto/mosquitto.log
> log_dest topic
> log_type error
> log_type warning
> log_type notice
> log_type information
> log_type all
> connection_messages true
> log_timestamp true
>
>
> The following is a log message：
> in mosquitto.log.1 is end of: "1402352707: Reloading config."
> in mosquitto.log.2 is end of: "1402266307: Reloading config."
> in mosquitto.log.3 is end of: "1402179907: Reloading config."
> in mosquitto.log.4 is end of: "1402093507: Reloading config."
> ...
>
> --
> You received this question notification because you are a member of
> Mosquitto PPA, which is an answer contact for mosquitto.

Roger Light, Thank you very much.
In that case, If i change the config to don't write log file, and it will not be reload config every day, is it?

Thanks Roger Light, that solved my question.