How to change the JDK for a Jenkins job?

Question

I have imported the jenkins jobs from existing jenkins server from another machine. But

Answer 1

Here is where you should configure in your job:

In JDK there is the combobox with the different JDK configured in your Jenkins.

Here is where you should configure in the config of your Jenkins:

Answer 2

Be careful with jobs

1 - if you have a job based in maven, Jenkins takes your default java configuration and you decide the compilation level in your POM.XML.

2 - if you have a free style job, in the the configuration option of the job you can select the JDK that you want to use.

Hope this help.

Answer 3

Here is my experience with Jenkins version 1.636: as long as I have only one "Install automatically" JDK configured in Jenkins JDK section, I don't see "JDK" dropdown in Job=>Configure section, but as soon as I added second JDK in Jenkins config, JDK dropdown appeared in Job=>Configure section with 3 options [(System), JDK1, JDK2]

Answer 4

For existing jobs you're editing, the JDK drop-down choice may not be available if you've just added a single JDK config in the 'Configure System' Jenkins settings.

However, it is available for new jobs.

Surprisingly, if you add a second JDK config, it becomes available in an existing job too.

This looks to me like a bug (tested in Jenkins ver. 1.629).

See a similar issue raised here: JDK selection is hidden even when a JDK is configured

Answer 5

Using latest Jenkins version 2.7.4 which is also having a bug for existing jobs.

1. Add new JDKs through Manage Jenkins -> Global Tool Configuration -> JDK ** If you edit current job then JDK dropdown is not showing (bug)

2. Hit http://your_jenkin_server:8080/restart and restart the server

3. Re-configure job

Now, you should see JDK dropdown in "job name" -> Configure in Jenkins web ui. It will list all JDKs available in Jenkins configuration.

Answer 6

If you have a multi-config (matrix) job, you do not have a JDK dropdown but need to configure the jdk as build axis.