'--quiet' flag does not suppress warnings

[mskardal]

This issue is pretty much a duplicate of #1284, but it was closed three years ago.

I have a systemd service that triggers a script where I am sending some messages with the mosquitto_pub command. When running the script manually from the command line, no warnings are printed. However, journalctl logs the following message Warning: unable to locate configuration directory default config not loaded. whenever the systemd service triggers the mosquitto_pub commands. I have tried using the --quiet flag, but the warnings still appear in journalctl. I am using v3.1.1 MQTT broker.

[st1nga]

I believe the issue is that mosquitto_pub looks in $HOME/.config/mosquitto_pub for the config
systemd does not set HOME
I added Environment to the service file

[Service]
Type=simple
Environment=HOME=%h

and that fixed the issue.
I didn't really want to use the --quiet option as that may stop other messages

[ralight]

That warning message was removed in 1.6.3, so if you upgrade to a recent version you should be ok.