# Configure Java 8 node in a Java 11 Jenkins Server

**URL:** <https://community.jenkins.io/t/configure-java-8-node-in-a-java-11-jenkins-server/11300>\
**Category:** Ask a question\
**Tags:** question\
**Created:** [December 15, 2023, 4:25pm UTC](https://community.jenkins.io/t/configure-java-8-node-in-a-java-11-jenkins-server/11300 "2023-12-15T16:25:24Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![anauecuri](https://avatars.discourse-cdn.com/v4/letter/a/9f8e36/32.png) [@anauecuri](https://community.jenkins.io/u/anauecuri)\
**Post date:** [December 15, 2023, 4:25pm UTC](https://community.jenkins.io/t/configure-java-8-node-in-a-java-11-jenkins-server/11300/1 "2023-12-15T16:25:24Z")

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Jenkins setup:  
Version 2.426.2  
Installation followed this page: [Linux](https://www.jenkins.io/doc/book/installing/linux/)

My Jenkins server has a Java 11 version and my applications run using openJDK-8.

I am trying to create a node from a docker container that uses a custom image. My Dockerfile uses as base image the jenkins/ssh-agent:latest-jdk8.

When I setup the node and launch the agent, I am getting the error below:

```auto
Error: A JNI error has occurred, please check your installation and try again
Exception in thread "main" java.lang.UnsupportedClassVersionError: hudson/remoting/Launcher has been compiled by a more recent version of the Java Runtime (class file version 55.0), this version of the Java Runtime only recognizes class file versions up to 52.0
	at java.lang.ClassLoader.defineClass1(Native Method)
	at java.lang.ClassLoader.defineClass(ClassLoader.java:756)
	at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
	at java.net.URLClassLoader.defineClass(URLClassLoader.java:473)
	at java.net.URLClassLoader.access$100(URLClassLoader.java:74)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:369)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:363)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:362)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:352)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
	at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:601)
Agent JVM has terminated. Exit code=1

```

So, my question is: Is it possible to launch a java 8 node into a java 11 jenkins server? If yes, can someone give how can I do this configuration?

Thank you.

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**Author:** ![mawinter69](https://dub1.discourse-cdn.com/flex013/user_avatar/community.jenkins.io/mawinter69/32/1625_2.png) [@mawinter69](https://community.jenkins.io/u/mawinter69)\
**Post date:** [December 15, 2023, 4:28pm UTC](https://community.jenkins.io/t/configure-java-8-node-in-a-java-11-jenkins-server/11300/2 "2023-12-15T16:28:54Z")

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the agent java process must be java 11, but nothing stops you from installing also jdk8 on your agent and make sure that your build process is using jdk8

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**Author:** ![anauecuri](https://avatars.discourse-cdn.com/v4/letter/a/9f8e36/32.png) [@anauecuri](https://community.jenkins.io/u/anauecuri)\
**Post date:** [December 15, 2023, 8:52pm UTC](https://community.jenkins.io/t/configure-java-8-node-in-a-java-11-jenkins-server/11300/3 "2023-12-15T20:52:46Z")

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Thanks. I was able to run the node with java 11 and then run pipelines using java 8.