# Jenkins doesn't start using Java 11

**URL:** <https://community.jenkins.io/t/jenkins-doesnt-start-using-java-11/14402>\
**Category:** Ask a question\
**Created:** [April 20, 2024, 1:59am UTC](https://community.jenkins.io/t/jenkins-doesnt-start-using-java-11/14402 "2024-04-20T01:59:40Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![BDaddy1969](https://avatars.discourse-cdn.com/v4/letter/b/8e8cbc/32.png) [@BDaddy1969](https://community.jenkins.io/u/BDaddy1969)\
**Post date:** [April 20, 2024, 1:59am UTC](https://community.jenkins.io/t/jenkins-doesnt-start-using-java-11/14402/1 "2024-04-20T01:59:40Z")

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We recently upgraded to Jenkins v2.319.3. We then tried to switch to Java 11 (OpenJDK 11). We run on RHEL 8 VM. We uninstalled the OpenJDK 8 and installed OpenJDK 11 so it was the only Java on the VM. After the change, when we try to start Jenkins, we see no process start and we see nothing written to the logs. We can uninstall OpenJDK 11 and install OpenJDK 8, and Jenkins will start with no issues.

Anyone have any ideas why we are seeing his behavior? I know we have a couple more LTS versions that support Java 8. We are moving to 2.332.4 next week, and we would like to get the migration to Java 11 accomplished as well if possible.

I appreciate any ideas/suggestions.

Thanks!

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**Author:** ![kuisathaverat](https://dub1.discourse-cdn.com/flex013/user_avatar/community.jenkins.io/kuisathaverat/32/101_2.png) [@kuisathaverat](https://community.jenkins.io/u/kuisathaverat)\
**Post date:** [April 23, 2024, 5:29pm UTC](https://community.jenkins.io/t/jenkins-doesnt-start-using-java-11/14402/2 "2024-04-23T17:29:36Z")

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If you do not have logs the error is probably in how you start the Jenkins service, try to start it manually to check if you can figure out what happens

BTW v2.319.3 is really old 2022-02-09 think to update to the latest LTS instead 2.332.4 which is really old too 2022-06-22, if you need a reason take a look at [Security Advisories](https://www.jenkins.io/security/advisories/)

> **[WAR file](https://www.jenkins.io/doc/book/installing/war-file/#run-the-war-file)**
>
> Jenkins – an open source automation server which enables developers around the world to reliably build, test, and deploy their software

> **[Getting started with the Guided Tour](https://www.jenkins.io/doc/pipeline/tour/getting-started/)**
>
> Jenkins – an open source automation server which enables developers around the world to reliably build, test, and deploy their software

> **[How to Start, Stop or Restart your Instance?](https://docs.cloudbees.com/docs/cloudbees-ci-kb/latest/client-and-managed-controllers/how-to-start-stop-or-restart-your-instance)**
>
> The easiest way to stop/restart a Jenkins instance is through the instance itself. In addition to the basic stop and restart commands Jenkins provides a set of commands to safely stop/restart Jenkins by putting it in a quiet mode.

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**Author:** ![poddingue](https://dub1.discourse-cdn.com/flex013/user_avatar/community.jenkins.io/poddingue/32/985_2.png) [@poddingue](https://community.jenkins.io/u/poddingue)\
**Post date:** [May 7, 2024, 1:47pm UTC](https://community.jenkins.io/t/jenkins-doesnt-start-using-java-11/14402/3 "2024-05-07T13:47:18Z")

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Please try to launch Jenkins via a `java -war` command with JDK11, and see if it’s complaining.