I upgraded Jenkins (Linux) 2.356 (JDK 1.8) to version 2.363 (JDK 11), controller is running fine I was able to login to the console. But, the 3 Linux agents went offline. I don’t want to upgrade agent Java version. All 3 are running on JDK 1.8. I am sure I missed something. Any help would be greatly…

[image] sftiit: Install Java 11 in all the agents Not sure how -->you<-- do this, it depends on your os, and setup, and all kinds of things. A quick google search for “$OS $DISTRO java 11” should help [image] sftiit: How to run the agent.jar using JDK 11? Set JAVA_HOME, and/OR path …

[image] sftiit: 52.0 is Java 1.8, I cannot upgrade agent Java since the web applications are using Java 1.8 only. My understand is I can run controller and agent on different Java versions. The same JDK is needed on the agent and the controller. The controllers sends Java classes to the agen…

[image] How to use two different versions of JDK Using Jenkins Hi there, As a reminder, the term “slave” to refer to an agent has been deprecated since 2016. The term “master” to refer to the controller has been deprecated since 2020. Please refer to On Jenkins Terminolo…

Please check my initial post How to use two different versions of JDK I thought agent can have different Java version.

[image] sftiit: I thought agent can have different Java version. agents can have another version installed, but the java running agent.jar needs to be the same as the controller. you can set JAVA_HOME and use a different version for builds though.

Please clarify with more details. Install Java 11 in all the agents How to run the agent.jar using JDK 11? How to force the Jenkins pipelines to use JDK 1.8?

Thanks. I installed the same version of JDK in one of the agent. It now has 2 version of JDK installed (1.8 and 11). I changed the JDK using ‘sudo alternatives --config java’ and issued a reboot. It now automatically connected to the controller. How do I use JDK 1.8 and run the application deploymen…

In the console ‘Node properties’ we defined the Environment variables for JAVA_HOME as /usr/java/latest. This symlink currently points to JDK11. Should I modify the symlink to point to JDK 1.8? OR should I add a JAVA_HOME in the Global Tool Configuration to point it to JDK 1.8 path? I don’t want to …

I tried setting JAVA_HOME in the node configuration as /usr/java/jdk1.8.0_351 but build still used Java 11. I SSH to the remote node and tried these commands. export JAVA_HOME=“path to Java 1.8” export PATH=$JAVA_HOME/bin:$PATH I also tried setting in Global tool config JAVA_HOME as /usr/java/jd…

changing something in your shell won’t change anything inside of jenkins. As I said, goto the configuration page of your agent, and update the environmental variables [image] You probably want to set both JAVA_HOME and PATH so they are setup right to point to the right directories You’ve given …

[image] halkeye: JAVA_HOME I tried setting JAVA_HOME but it gets overridden by some Jenkins default Setting JAVA_HOME_TEST appears on the agent, so setting env for agent definitely works

Jenkins Post Upgrade Issue

Using Jenkins

halkeye (Gavin Mogan) February 19, 2023, 9:47pm 3

explains how to use a different version of java for builds rather than running jenkins

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