what uses systemd-journal

I was in the yast software manager,
where I searched for ‘games’
and selected to taboo all in the list.
I noticed the already installed still have checkmarks,
and when I chose to delete them,
it talked about what to do with dependencies
however it didn’t have the deinstallation option,
and talked about unlocking things.
I decided to cancel everything,
but when I canceled the window wouldn’t disappear,
everything except Qt Creator’s titlebar became invisible,
and it eventually crashed.
I’m using lxqt + openbox.

I tried rebooting but nothing happened.
qTerminal opened, and the top command showed me systemd-journal with 99-100% CPU.
Does yast use this? I also had Qt Creator and Chromium open.
Is it safe to use the kill command in this case?

I tried Ctrl+Alt+backspace*2 but it just went to a dark screen,
and I was eventually forced to do a hard shutdown.

From the following page at freedesktop:

systemd-journald is a system service that collects and stores logging data

It was likely logging the event that was occurring. Or was trying to. systemd-journal should be running as the root user, and so you will likely be unable to kill that process. And if you could, I would refrain from doing so. It’s best to let it attempt to finish writing out what it is it’s doing.

Thanks :-]