JDK11 is the new default

[mbarbero]

No description provided.

[msohn]

• looks like this broke jgit builds which still need java 8, see https://git.eclipse.org/r/c/jgit/jgit/+/175247
• was this announced somewhere ?

[mbarbero]

Your build is relying on the default java installed on the agent which is not really a best practice (and can be broken whenever this default jdk change). We upgraded the default jdk in agents as this is the one running the agent's remoting code. This is done to align the jdk used to run Jenkins controller (aka master) and the agent). It's an internal change so we did not announced it.

In order to use a stable JDK, you should use the following directive in your build:

tool name: 'adoptopenjdk-hotspot-jdk8-latest', type: 'jdk'

The list of valid names for jdk tools can be found here https://wiki.eclipse.org/Jenkins#JDK

[mbarbero]

(see https://www.jenkins.io/doc/book/pipeline/syntax/#tools and https://support.cloudbees.com/hc/en-us/articles/115001595227-How-To-Specify-A-Specific-JDK-In-Pipeline- for details how to use the directive).

[msohn]

thanks