I installed jenkins on Cnetos 7 using the following:
sudo wget -O /etc/yum.repos.d/jenkins.repo http://pkg.jenkins.io/redhat-stable/jenkins.repo sudo rpm --impor
Looks like java version conflicts.
Please refer https://medium.com/lucian-daniliuc/upgrading-jenkins-on-ubuntu-14-04-lts-df3e1209f98c