Hi,
Recently I updated my experimental syslog-ng repo built from git head for RHEL/CentOS 7 & Fedora to use openjdk 1.8 instead of 1.7, as it might support Oracle Java packages better (no need to install both openjdk and Oracle java).
@Evan: please give it a try, if it fixes your problem:
https://copr.fedorainfracloud.org/coprs/czanik/syslog-ng-githead/@everyone: would you mind, if I update the dependency also for my unofficial packages for the next release? (3.15) As far as I can see, it's not openjdk 1.7 but 1.8 which is installed by default on CentOS 7.