Jenkins fails when running “service start jenkins”

Question

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         


        

Answer 1

I had the same issue, and when I checked if Java is installed I realised it's not, so installing Java solved the problem for me.

Check for java:

java -version

If Java is installed in the system, the command will return the java version otherwise it will show a message like this.

The program 'java' can be found in the following packages:
 * default-jre
 * gcj-5-jre-headless
 * openjdk-8-jre-headless
 * gcj-4.8-jre-headless
 * gcj-4.9-jre-headless
 * openjdk-9-jre-headless

To install java use the following command.

sudo apt-get install default-jre

Answer 2

For ubuntu 16.04, there is firewall issue. You need to open 8080 port using following command:

sudo ufw allow 8080

Detailed steps are given here: https://www.digitalocean.com/community/tutorials/how-to-install-jenkins-on-ubuntu-16-04

Answer 3

ERROR: Linux / Centos:

Job for jenkins.service failed because the control process exited with error code. See "systemctl status jenkins.service" and "journalctl -xe" for details.

Solution:

• Edit the Jenkins init file by doing

  sudo vi /etc/init.d/jenkins
  

• Add your own Java path, for example:

  /opt/oracle/product/java/jdk1.8.0_45/bin/java
  

• Restart the service:

  sudo service jenkins start
  sudo service jenkins status
  sudo service jenkins stop