Maybe it's cutting it off and suppose to be adserver-access.log?
, the log file contains a bunch of these
200.42.182.190 - - [26/Jul/2016:17:23:24 -0400] "GET /www/delivery/afr.php?zoneid=2&cb=INSERT_RANDOM_NUMBER_HERE HTTP/1.1" 200 1303 "https://yout.com/video/TDOQZyFeAnE/e" "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.103 Safari/537.36"
105.155.123.115 - - [26/Jul/2016:17:23:24 -0400] "GET /www/delivery/afr.php?zoneid=5&cb=INSERT_RANDOM_NUMBER_HERE HTTP/1.1" 200 1290 "https://yout.com/watch?v=TYQpqSTc9ho" "Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.112 Safari/537.36"
105.155.123.115 - - [26/Jul/2016:17:23:24 -0400] "GET /www/delivery/afr.php?zoneid=2&cb=INSERT_RANDOM_NUMBER_HERE HTTP/1.1" 200 1213 "https://yout.com/watch?v=TYQpqSTc9ho" "Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.112 Safari/537.36"
Edit #1:
I think it might be the apache server logs? Not really sure. This box is only used for the revive ad server. I had to edit the max number of conenctions and it's been working fine since, but this log file grows pretty quickly so I have to go in and delete it and not sure where it's being logged from.
Also side note @Erik Geurts your "We can host your Revive Adserver for you. Just have a look at Aqua Platform." link is broken
Edit #2:
I went ahead and set the log rotation to daily to see if that mitigates it. As it seems weekly was too large for apache 2 in ubuntu. If it happens again I will update if not assume this fixed it