New mosquitto version breaks monitor functionality

[mmatesic01]

Hello,

This is what I get:

Unpacking mosquitto (2.0.13-0mosquitto1buster1) ...
Setting up libwebsockets18:armhf (4.2.1-0mosquitto1buster2) ...
Setting up mosquitto (2.0.13-0mosquitto1~buster1) ...
Created symlink /etc/systemd/system/multi-user.target.wants/mosquitto.service → /lib/systemd/system/mosquitto.service.
Job for mosquitto.service failed because a fatal signal was delivered to the control process.
See "systemctl status mosquitto.service" and "journalctl -xe" for details.
invoke-rc.d: initscript mosquitto, action "start" failed.
● mosquitto.service - Mosquitto MQTT Broker
Loaded: loaded (/lib/systemd/system/mosquitto.service; enabled; vendor preset: enabled)
Active: activating (auto-restart) (Result: signal) since Sun 2021-11-14 09:06:28 CET; 180ms ago
Docs: man:mosquitto.conf(5)
man:mosquitto(8)
Process: 5178 ExecStartPre=/bin/mkdir -m 740 -p /var/log/mosquitto (code=exited, status=0/SUCCESS)
Process: 5181 ExecStartPre=/bin/chown mosquitto /var/log/mosquitto (code=exited, status=0/SUCCESS)
Process: 5183 ExecStartPre=/bin/mkdir -m 740 -p /run/mosquitto (code=exited, status=0/SUCCESS)
Process: 5187 ExecStartPre=/bin/chown mosquitto /run/mosquitto (code=exited, status=0/SUCCESS)
Process: 5188 ExecStart=/usr/sbin/mosquitto -c /etc/mosquitto/mosquitto.conf (code=killed, signal=ILL)
Main PID: 5188 (code=killed, signal=ILL)

Nov 14 09:06:28 raspberrypi systemd[1]: mosquitto.service: Service RestartSec=100ms expired, scheduling restart.
Nov 14 09:06:28 raspberrypi systemd[1]: mosquitto.service: Scheduled restart job, restart counter is at 1.
Nov 14 09:06:28 raspberrypi systemd[1]: Stopped Mosquitto MQTT Broker.
dpkg: error processing package mosquitto (--configure):
installed mosquitto package post-installation script subprocess returned error exit status 1
Processing triggers for systemd (241-7~deb10u8+rpi1) ...
Processing triggers for man-db (2.8.5-2) ...
Processing triggers for libc-bin (2.28-10+rpt2+rpi1) ...
Errors were encountered while processing:
mosquitto
E: Sub-process /usr/bin/dpkg returned an error code (1)

[drageloth]

Same problem, saw that when running "gdb --args /usr/sbin/mosquitto -c /etc/mosquitto/mosquitto.conf", it shows
0xb6b5e7a0 in ?? () from /usr/lib/arm-linux-gnueabihf/libwebsockets.so.18
Seems like a problem with libwebsockets?? Dunno, but I have the same problem whether in Buster or Bullseye.
I've compiled libwebsockets with the same problem.
If anyone finds a solution, I'd love to hear it.

[mmatesic01]

Downgrading from 2.0.13-0mosquitto1~buster1 version back to 1.5.7-1+deb10u1 brings back functionality for monitor.

[drageloth]

Can you elaborate on the steps needed? Because I couldn't install an earlier package neither on buster nor bullseye

[mmatesic01]

I am using RPi Zero and it did the trick.

Instead of this (as explained in instructions) :
sudo apt-get install -f libmosquitto-dev mosquitto mosquitto-clients libmosquitto1

I did this:
sudo apt-get install -f libmosquitto-dev=1.5.7-1+deb10u1 mosquitto=1.5.7-1+deb10u1 mosquitto-clients=1.5.7-1+deb10u1 libmosquitto1=1.5.7-1+deb10u1

or install each separately with adding "=1.5.7-1+deb10u1" at the end.

[andrewjfreyer]

Thanks for the note, everyone. I'll look into this.

[cyclistguy]

Same issue...did a clean install on a Rasp Pi Zero W with Bullseye and pulled Mosquito from the main Pi repository (v2.0.11) and everything works fine again.

[drageloth]

Thanks for the note, everyone. I'll look into this.

Yes, the problem seems installing the repo.
If you do the sudo apt-get install -f libmosquitto-dev mosquitto mosquitto-clients libmosquitto1
without installing the repo mentioned in the how-to, it installs and works with bullseye

[26tajeen]

oh chuff is that so? I've just wasted an hour then! Downgraded to Buster from Bullseye and got same error - should have just not installed the repo it seems. @andrewjfreyer could the docs be updated? Thanks!!