configd_ctl.py logging billions of "config_changed" messages

[rovingclimber]

Good morning!

Hope someone here might help me diagnose this one ... recently upgraded to OPNsense 21.1.9-amd64, and I noticed this morning very high cpu usage on my opnsense box. I'm relatively new to opnsense but a little poking around shows this:

PID	USERNAME	PRI	NICE	SIZE	RES	STATE	C	TIME	WCPU	COMMAND
19011	root	103	0	1036	1560	CPU1	1	412:37	100.00%	/usr/local/sbin/syslogd -s -c -c -P /var/run/syslog.pid -p /var/run/legacy_log -S /var/run/legacy_logpriv -k -s -s -f /var/etc/syslog.conf
59064	root	103	0	6382	1141	CPU3	3	16.9H	98.97%	/usr/local/bin/python3 /usr/local/opnsense/service/configd_ctl.py -e -t 0.5 system event config_changed (python3.7)
30701	root	83	0	35	5096	CPU2	2	0:27	36.47%	/usr/local/sbin/syslog-ng -f /usr/local/etc/syslog-ng.conf -p /var/run/syslog-ng.pid{syslog-ng}
11	root	155	ki31	0	64	RUN	0	436.3H	19.29%	[idle{idle: cpu0}]

And my log file is full of millions of repeated events like this:

2021-07-28T08:35:59   configctl[59064]   event @ 1627453482.74 msg:
2021-07-28T08:35:59   configctl[59064]   event @ 1627453482.74 msg:
2021-07-28T08:35:59   configctl[59064]   event @ 1627453482.74 msg:
2021-07-28T08:35:59   configctl[59064]   event @ 1627453482.74 msg:
2021-07-28T08:35:59   configctl[59064]   event @ 1627453482.74 msg:
2021-07-28T08:35:59   configctl[59064]   event @ 1627453482.74 msg:
2021-07-28T08:35:59   configctl[59064]   event @ 1627453482.74 msg:

I tried restarting the configd service but problem still persists. I haven't yet tried restarting the box as two of us working from home today, but then the whole point of a resilient firewall is that I shouldn't need to, right? Any ideas gratefully received!

[lilsense]

A Reboot will fix it.