add JDK 14 community build

[SethTisue]

I'm not sure we really have the resources for this at present, and I think adding Graal is a higher priority.

Regardless, yes at some point we should replace the JDK 13 build with a JDK 14 one.

The JDK 13 ticket is #873, we should work through that one first.

Note that JDK 14 isn't LTS. (JDK 17 will be LTS.)

[SethTisue]

according to https://openjdk.java.net/projects/jdk/14/ ,

2020/02/06 |   | Initial Release Candidate
2020/02/20 |   | Final Release Candidate
2020/03/17 |   | General Availability

[SethTisue]

on MacOS, one way to get 14 is:

1. brew cask install java-beta
2. (if on Catalina) sudo xattr -dr com.apple.quarantine /Library/Java/JavaVirtualMachines/openjdk-14.jdk
3. export JAVA_HOME=$(/usr/libexec/java_home -v 14)

[SethTisue]

for now, just to make sure something isn't horribly broken build-wide, I did local runs of a subset of the build on MacOS using "OpenJDK Runtime Environment (build 14-ea+14-570)" and got similar results as we're seeing on JDK 13.

(on 2.12.x and 2.13.x I used ./narrow play-webgoat scala-pet-store as the subset, on 2.11.x ./narrow play-webgoat http4s)

[SethTisue]

14's release date is now just a couple months away, and I think we've learned everything we're going to learn from the 13 build, so now seems like a good time to swap in 14 for 13

sudo apt-get install adoptopenjdk-14-hotspot doesn't work yet, and 14 isn't available from https://adoptopenjdk.net/installation.html yet anyway

so installation steps are:

cd /usr/lib/jvm
sudo curl -O -L 'https://download.java.net/java/early_access/jdk14/33/GPL/openjdk-14-ea+33_linux-x64_bin.tar.gz'
sudo dtrx -n openjdk-14-ea+33_linux-x64_bin.tar.gz
sudo rm openjdk-14-ea+33_linux-x64_bin.tar.gz
sudo chmod -R go+rX openjdk-14-ea+33_linux-x64_bin
sudo ln -s openjdk-14-ea+33_linux-x64_bin java-14-openjdk-x64

I did this on all 3 behemoths

then in Jenkins I renamed the two jdk13 jobs (2.12.x and 2.13.x) to jdk14 and changed the jvmVersion to 14, and also ssh'ed in to the behemoths and deleted the jdk13 workspaces

then I triggered new runs and checked the logs to see if they're successfully selecting JDK 14, and they are. both jobs are running now:

• https://scala-ci.typesafe.com/job/scala-2.12.x-jdk14-integrate-community-build/687/
• https://scala-ci.typesafe.com/job/scala-2.13.x-jdk14-integrate-community-build/631/

[SethTisue]

this is done

results are very similar to the JDK 13 results. I did a few more test runs, excluded a few tests, reported a new Akka failure upstream, marked a repo or two as expected-to-fail, little things like that

I may do some light followup work to see if we can shorten the expected-to-fail list

[SethTisue]

https://openjdk.java.net/projects/jdk/14/ says that the "final release candidate" is coming Feb 20. I should upgrade the behemoths as soon as it's available. I'll check it on Feb 21

[SethTisue]

final is out. ticket: #1109

[SethTisue]

the action is moving to JDK 15 now: #1225