This bug has been created based on an anonymous crash report requested by the package maintainer. Report URL: https://faf.lab.eng.brq.redhat.com/faf/reports/bthash/b5520eb00e8c63858bfcabd7d3d6b3de87fad0d5/ Visible only on ppc64 and ppc64le. This is a 7.7 candidate.
It appears that the system is simply under a heavy load. Each subsequent systemd-journald process tries to rotate the logs and is killed by watchdog before it's got a chance to finish. I imagine the abrt process(es) doing coredump(s) don't help either.