The culprit was the php5-fpm process. Restarting it fixed it.
Error output from apache:
[Mon May 20 15:36:53.945158 2019] [proxy_fcgi:error] [pid 20480:tid
139913676658432] [client 50.57.61.7:62769] AH01067: Failed to read
FastCGI header
[Mon May 20 15:36:53.945213 2019] [proxy_fcgi:error] [pid 20480:tid
139913676658432] (104)Connection reset by peer: [client
50.57.61.7:62769] AH01075: Error dispatching request to :
Looks like someone set up some kind of status checker that locally
hits
blah.sudoroom.org every second?
2019-05-20 15:39:45 127.0.0.1
blah.sudoroom.org "GET
/server-status?auto HTTP/1.1" 200
Was it supposed to inform us that
sudoroom.org was down?
--
marc/juul