can't upgrade jenkins for java version error

Question

I have Jenkins running on my Ubuntu 14.04, and i am trying to do upgrade for jenkins using normal apt-get install jenkins, but when i try to do it, i keep getti

Answer 1

You need JDK 8 to run jenkins: https://www.digitalocean.com/community/tutorials/how-to-install-java-with-apt-get-on-ubuntu-16-04

Answer 2

Update your java version by using these commands,

sudo -E add-apt-repository ppa:openjdk-r/ppa 

sudo apt-get update

sudo apt-get install openjdk-8-jdk

and follow this command to change your default selection mode of java version.

sudo update-alternatives --config java

It should be set to java 8 values.

Answer 3

You're using Java 7, but Jenkins needs Java 8 - see: https://jenkins.io/blog/2017/04/10/jenkins-has-upgraded-to-java-8