Is your Pi4 an ARM64 device, or ArmHF ?
Curiously, it’s only failing when…
Asking to monitor 2 or more log files, when running in Daemon mode, either from a service file, or the command line.
As in
This works
frontail /var/log/openhab2/openHAB.log /var/log/openhab2/events.log
This also works
frontail /var/log/openhab2/*
But these do not
frontail -d /var/log/openhab2/openHAB.log /var/log/openhab2/events.log
frontail -d /var/log/openhab2/*
But these do work
frontail -p 9001 /var/log/openhab2/openHAB.log
frontail -p 9002 /var/log/openhab2/events.log
“When I run the {above commands} from a prompt, everything is fine, but from a service file, anything more than 1 log file causes a restart limit and the service stops”