[Debian-iot-maintainers] Bug#1127984: mosquitto doesn' start

[nathan.benmansour]

Package: mosquitto
Version: 2.0.22-5
Severity: important

Dear Maintainer,

at start I have the following:
systemctl start mosquitto.service
Job for mosquitto.service failed because the control process exited with error code.
See "systemctl status mosquitto.service" and "journalctl -xeu mosquitto.service" for details.

systemctl status mosquitto.service says:
× mosquitto.service - Mosquitto MQTT Broker
Loaded: loaded (/usr/lib/systemd/system/mosquitto.service; enabled; preset: enabled)
Active: failed (Result: exit-code) since Sat 2026-02-14 20:35:17 CET; 1s ago
Invocation: 8dccca852b1d43d8974cced6bde6069d
Docs: man:mosquitto.conf(5)
man:mosquitto(8)
Process: 28170 ExecStart=/usr/sbin/mosquitto -c /etc/mosquitto/mosquitto.conf (code=exited, status=127)
Main PID: 28170 (code=exited, status=127)
Mem peak: 2M
CPU: 11ms

févr. 14 20:35:17 atom.dagami.top systemd[1]: mosquitto.service: Scheduled restart job, restart counter is at 5.
févr. 14 20:35:17 atom.dagami.top systemd[1]: mosquitto.service: Start request repeated too quickly.
févr. 14 20:35:17 atom.dagami.top systemd[1]: mosquitto.service: Failed with result 'exit-code'.
févr. 14 20:35:17 atom.dagami.top systemd[1]: Failed to start mosquitto.service - Mosquitto MQTT Broker.

and journalctl -xeu mosquitto.service says:

[...]
févr. 14 20:35:17 atom.dagami.top mosquitto[28170]: /usr/sbin/mosquitto: error while loading shared libraries: libdlt.so.2: cannot open shared object file: No such file or directory
févr. 14 20:35:17 atom.dagami.top systemd[1]: mosquitto.service: Main process exited, code=exited, status=127/n/a
Subject: Unit process exited
Defined-By: systemd
Support: https://www.debian.org/support

An ExecStart= process belonging to unit mosquitto.service has exited.

The process' exit code is 'exited' and its exit status is 127.
[...]

-- System Information:
Debian Release: forky/sid
APT prefers unstable
APT policy: (500, 'unstable')
Architecture: amd64 (x86_64)

Kernel: Linux 6.18.9+deb14-amd64 (SMP w/4 CPU threads; PREEMPT)
Locale: LANG=fr_FR.UTF-8, LC_CTYPE=fr_FR.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages mosquitto depends on:
ii adduser 3.154
ii init-system-helpers 1.69
ii libc6 2.42-13
ii libcjson1 1.7.19-2
ii libdlt2 3.0.0-2
ii libmosquitto1 2.0.22-5
ii libssl3t64 3.5.5-1
ii libsystemd0 259.1-1
ii libwebsockets19t64 4.3.5-3
ii libwrap0 7.6.q-36+b2
ii sysvinit-utils 3.15-6

mosquitto recommends no packages.

Versions of packages mosquitto suggests:
ii apparmor 4.1.6-2

-- no debconf information