4.9 /var/run/rhnsd.pid file not readable after starting Spacewalk daemon

Oracle Linux 8 systems fail to read PID from /var/run/rhnsd.pid after the Spacewalk daemon starts.

The following error is reported in the /var/log/messages log:

systemd: Failed to read PID from file /var/run/rhnsd.pid: Invalid argument

This error can be safely ignored.

(Bug ID 2953130)