Mark,
I don't see anything on the error log:
[Wed Oct 31 09:42:15.809519 2018] [mpm_prefork:notice] [pid 1613] AH00170: caught SIGWINCH, shutting down gracefully [Wed Oct 31 09:42:16.857815 2018] [suexec:notice] [pid 2583] AH01232: suEXEC mechanism enabled (wrapper: /usr/sbin/suexec) [Wed Oct 31 09:42:16.871075 2018] [auth_digest:notice] [pid 2583] AH01757: generating secret for digest authentication ... [Wed Oct 31 09:42:16.871608 2018] [lbmethod_heartbeat:notice] [pid 2583] AH02282: No slotmem from mod_heartmonitor [Wed Oct 31 09:42:16.874951 2018] [mpm_prefork:notice] [pid 2583] AH00163: Apache/2.4.6 (Red Hat Enterprise Linux) mod_wsgi/3.4 Python/2.7.5 configured -- resuming normal operations [Wed Oct 31 09:42:16.874984 2018] [core:notice] [pid 2583] AH00094: Command line: '/usr/sbin/httpd -D FOREGROUND' [Wed Oct 31 10:39:17.263725 2018] [mpm_prefork:notice] [pid 2583] AH00170: caught SIGWINCH, shutting down gracefully