Jenkins not starting on CentOS 7 / RHEL 7

Today i was installing Jenkins on a CentOS7 systems. After installing it via Jenkins yum repository, the service was not stating. The java was already installed on the server.

Issue

• You have installed jenkins on a CentOS7 / RHEL7 system.
• jenkins is not starting via systemctl start jenkins command, and it is throwing journalctl -xn error.
  Caused by: java.lang.UnsatisfiedLinkError: /tmp/jna--1712433994/jna6368781091883887102.tmp: /tmp/jna--1712433994/jna6368781091883887102.tmp: failed to map segment from shared object: Operation not permitted

Solution

• Makes sure you have installed java and verify the version.

  # java -version
  openjdk version "1.8.0_121"
  OpenJDK Runtime Environment (build 1.8.0_121-b13)
  OpenJDK 64-Bit Server VM (build 25.121-b13, mixed mode)

• edit /etc/sysconfig/jenkins , and change the below line,

  Line number 48, change

  ENKINS_JAVA_OPTIONS="-Djava.awt.headless=true"

  to

  JENKINS_JAVA_OPTIONS="-Djava.awt.headless=true -Djna.tmpdir=/var/lib/jenkins/tmp"

• Now you will be able to stop and start the jenkins service without any error.
  systemctl stop jenkins
systemctl start jenkins