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Re: [mosquitto-dev] Spotty connection to remote bridge causes local broker to fail
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This is down to the broker doing DNS lookups for the remote end of the
bridge while the connection is down.
There is an open issue to track this.
https://github.com/eclipse/mosquitto/issues/41
If you can use an IP address for the remote end of the broker that will
work round the problem for now.
On 12/12/16 23:28, Brent Sink wrote:
> I have configured the mosquitto broker on the local machine to bridge
> some topics to a remote broker. The connection to the remote broker is
> over UMTS (interface ppp0), so connection is not always that great and
> often comes and goes. I've noticed that when the connection to the
> remote broker is lost, it also causes some problems with the local
> broker as well. For example, I have a C++ application publishing data
> to the local broker (localhost) and when the UMTS connection gets
> dropped, my app gets a disconnection from remote broker first, then
> several seconds later the connection to localhost is lost.
>
>
> When this happens, if I open up a terminal and type in "mosquitto_sub -t
> '$SYS/broker/#' -v", nothing happens - there is no connection refused
> message, it just sits there like it's waiting on something to happen.
>
>
> I've set up the metrics in each interface so that the wifi1 interface is
> metric 0, and ppp0 is metric 20, thinking that perhaps UMTS is taking
> precedence over wifi but it did not change anything.
>
>
> If I disable the bridge in the .config file, this problem does not occur.
>
>
> Here is my mosquitto.conf file:
>
>
> root@ubuntu:~# cat /etc/mosquitto/mosquitto.conf
> pid_file /var/run/mosquitto.pid
>
> persistence false
> persistence_location /var/lib/mosquitto/
>
> log_dest file /var/log/mosquitto/mosquitto.log
> log_facility 5
>
> include_dir /etc/mosquitto/conf.d
>
> listener 1883
>
> connection br-to-cloud-12345
> address <removed>.com:1883
> remote_username blah
> remote_password blah
> topic out/topic out 2 "" ""
> topic in/topic/# in "" ""
>
>
>
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