Why does dgraph not respond to any requests with "Roll up " or " LOG Compact" logs every so often when I perform an insert test

@martinmr had fixed a similar issue where Zero was trying to delete the Dgraph types over and over again, but because Types are not predicates, was unable to delete them. And therefore, it kept on going in a loop about it. This sounds similar. Can you confirm that FriendTest is a type?