Jenkins failed to start in linux

Question

go to run jenkins after doing an upgrade, and get the following:

start jenkins
start: Job failed to start

That\'s it...nothing shows up in jenk

Answer 1

I got from this link: https://serverfault.com/questions/710680/jenkins-not-starting-in-ubuntu

It might be caused by a full disk. To be really sure, try running it manually. Like this: /usr/bin/java -Djava.awt.headless=true -jar /usr/share/jenkins/jenkins.war --webroot=/var/cache/jenkins/war --httpPort=8080 --ajp13Port=-1

Answer 2

The following worked for me:

sudo rm /etc/init/jenkins.conf
sudo update-rc.d jenkins defaults
sudo service jenkins start

Then....

root@core:/# service jenkins start
* Starting Jenkins Continuous Integration Server jenkins                    [ OK ] 

Borrowed from: https://groups.google.com/forum/#!msg/jenkinsci-users/eW_yEWLojFc/tFhb8DKoRHUJ

Answer 3

So, knowing it was a pre-start error allowed me to investigate more deeply.

Further digging allowed me to figure out that the exact line in the /etc/init/jenkins.conf file was one pointing to the /usr/share/jenkins/bin/maintain-plugins.sh

Looking at this location, I found it was not present (ie. no bin directory). This means that jenkins-common was no longer installed for some reason...odd indeed...going into apt-get and doing an install of this component again led to the error:

dpkg error processing /var/cache/apt/archives/jenkins-common_1.409.1-0ubuntu4.2_all.deb ...

having seen this error before and refreshing my memory via google gave the following solution:

dpkg -i --force-overwrite /var/cache/apt/archives/jenkins-common_1.409.1-0ubuntu4.2_all.deb

This allowed the installation of common to proceed as normal. After this, all I had to do was replace the /usr/share/jenkins/jenkins.war with my backed up copy (because ubuntu is far behind the latest release version), and I was able to start the server again.

I am not exactly sure what caused the problem to begin with, but it was likely during an apt-get upgrade/clean process...and because of the weirdness with jenkins conflicting with jenkins-common, it did not repopulate the /usr/share/jenkins directory properly.

regardless, am glad it is working again. :)

Answer 4

Ubuntu 18.04 LTS use Java 9 as default java

Jenkins 2.107.2 still use Java 8

[Solution]

Install Java 8 before install Jenkins

sudo add-apt-repository ppa:webupd8team/java
sudo apt install oracle-java8-installer
wget -q -O - https://pkg.jenkins.io/debian-stable/jenkins.io.key | sudo apt-key add -
sudo apt-add-repository "deb https://pkg.jenkins.io/debian-stable binary/"
sudo apt install jenkins

See https://stackoverflow.com/a/49937744/900684

Answer 5

I went to see the jenkins logs tail -f /var/log/jenkins/jenkins.log

In my case it didn't start because I used incompatible java version. Update and make sure it sees correct java (In my case it should have been opened using JRE 1.7. To check, please use java -version command) and all should work

Answer 6

Instead, you can run the following before the install to properly clean up any conffiles left by the distro version:

sudo apt-get purge jenkins

Then install the correct version.