I wasn't aware of using it. I went through my config, including apache2.conf, everything under mods-enabled, sites.enabled, conf.d, etc. both manually and using grep and was unable to find any reference to it. However, I found package libapache2-reload-perl installed on my system. I uninstalled it, restarted Apache and haven't seen the issue reoccur. Thanks to you and the other responders.