Thanks for the quick reply.
I fat fingered my version. I'm currently running 5.3.1-398 on both nodes.
It looks like each call for the adclient has the name of a script, kept under /var/spool/cron, passed to it, like
displayName=FuelReport
These crons are executed within the root user's crontab file. Is there any way to verify what process or executable the adclient is being called by?