Jenkins on Linuz AWS AMI error java lang UnsupportedClassVersionError 51 0

Question

I am trying to install Jenkins on AWS Linux Image. I have installed Jenkins using the following command:

sudo yum install jenkins -y

But now when I start the service using the following command:

sudo service jenkins start 

I get the following error:

Complete!
[ec2-user@ip-10-0-2-100 ~]$ sudo service jenkins start
Starting Jenkins Aug 29, 2019 12:18:03 PM Main verifyJavaVersion
SEVERE: Running with Java class version 51, which is older than the Minimum required version 52. See https://jenkins.io/redirect/java-support/
java.lang.UnsupportedClassVersionError: 51.0
        at Main.verifyJavaVersion(Main.java:182)
        at Main.main(Main.java:142)

Jenkins requires Java versions [8, 11] but you are running with Java 1.7 from /usr/lib/jvm/java-1.7.0-openjdk-1.7.0.231.x86_64/jre
java.lang.UnsupportedClassVersionError: 51.0
        at Main.verifyJavaVersion(Main.java:182)
        at Main.main(Main.java:142)
                                                           [  OK  ]
[ec2-user@ip-10-0-2-100 ~]$

Answer 1

I had a similar problem, i removed the Jdk 1.7 version and everything worked fine.

To do so, i did as following:

- rpm -aq | grep -i jdk

- sudo yum remove <desired_java_version>

- sudo yum install java-1.8.0-openjdk-devel

I hope this can help you :-)