WARNING: Jenkins update to 2.60.1 requires Java 8

[gibfahn]

Needs doing:

• Create a job to run a java -version (and probably a which java/where java) on each machine, so we can see where we're going to have issues. If the job failed on Java <8 that would be ideal
• Upgrade ansible scripts for machines which need it.
• Apply scripts to machines and get us ready to upgrade
• Upgrade and make sure things still work (some machines may not be using the Java in the path for Jenkins connection)

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Note for @nodejs/build @nodejs/jenkins-admins considering clicking the shiny red button to update Jenkins

In the changelog for 2.60.1 it notes that it requires Java 8 to be installed on all the hosts.

2.60.1 is the first Jenkins LTS release that requires Java 8 to run. If you're using the Maven Project type, please note that it needs to use a JDK capable of running Jenkins, i.e. JDK 8 or up. If you configure an older JDK in a Maven Project, Jenkins will attempt to find a newer JDK and use that automatically. If your SSH Slaves fail to start and you have the plugin install the JRE to run them, make sure to update SSH Slaves Plugin to at least version 1.17 (1.20 recommended).

I'm pretty sure we don't have Java 8 on all our hosts, so updating will stop those hosts being able to connect.

[gibfahn]

I guess the plan would be to confirm that all our machines are running Java 8 and then update.

[jbergstroem]

$ ssh ci java -version              
java version "1.8.0_131"
Java(TM) SE Runtime Environment (build 1.8.0_131-b11)
Java HotSpot(TM) 64-Bit Server VM (build 25.131-b11, mixed mode)

[gibfahn]

@jbergstroem sure, but what about the individual hosts? For example I'm pretty sure AIX is using Java 7 (see here).

For background, we upgraded our Jenkins instance, and a bunch of our slaves were suddenly unable to connect, so we had to revert.

[jbergstroem]

@gibfahn I didn't get that even agents now require java 8. What kind of crazy is this :(

[jbergstroem]

So, anyone with any ideas on how we move forward here? We are out of LTS meaning any security bugs (expect them) will hit us pretty hard.

[bnoordhuis]

There is a Java 8 JDK for AIX (link), same for FreeBSD. The only problem might be SmartOS (which frankly I couldn't care less about.)

[geek]

SmartOS has Java 8 support https://gist.github.com/dekobon/305883fb6d776b0c9fc1

[jbergstroem]

There's a few older systems like centos5 which doesn't pack it either. If this is only a matter of adding more package source repos then it might not be as bad then.

[gibfahn]

Discussed in the meeting (minutes: #845), consensus was that we need to deal with this. I'll put some concrete steps in the first comment.

[joaocgreis]

Here is a first version of the job: https://ci.nodejs.org/view/All/job/check-java-version/2/ (Build WG only) feel free to edit as needed. I left Windows out because all Windows machines already have Java 8.