List of supported JVMs on Ubuntu Focal incorrect (OpenJDK 8 unsupported)

[joschi]

According to the documentation about the Ubuntu 20.04 (Focal Fossa) Build Environment, it should come with OpenJDK 8 preinstalled:

Pre-installed JVMs: openjdk8, openjdk10, and openjdk11 on x86, default is openjdk11.

https://docs.travis-ci.com/user/reference/focal/#jvm-clojure-groovy-java-scala-support https://github.com/travis-ci/docs-travis-ci-com/blame/f6814e6281e1036b6ca056b49106cabcdc74e77e/user/reference/focal.md#L137

Unfortunately this is incorrect and only OpenJDK 9 and later seem to be supported:

$ ~/bin/install-jdk.sh --target "/home/travis/openjdk8" --workspace "/home/travis/.cache/install-jdk" --feature "8" --license "GPL" --cacerts
Ignoring license option: GPL -- using GPLv2+CE by default
install-jdk.sh 2020-06-02
Expected feature release number in range of 9 to 16, but got: 8
The command "~/bin/install-jdk.sh --target "/home/travis/openjdk8" --workspace "/home/travis/.cache/install-jdk" --feature "8" --license "GPL" --cacerts" failed and exited with 3 during .

Source: https://travis-ci.com/github/dropwizard/dropwizard/jobs/403800987#L170-L174

There is also an unanswered topic in the Travis CI Community about this: https://travis-ci.community/t/openjdk8-setup-fails-on-focal/9760/2

Given that Java 8 is still in wide use, it would be great if support for OpenJDK 8 could be added to the Ubuntu 20.04 (Focal Fossa) Build Environment.

[sormuras]

Perhaps related to https://github.com/sormuras/bach/issues/72?

[joschi]

@sormuras The message is a different one and the --feature seems to be checked before anything is being downloaded.

[joschi]

@sormuras 🤷 https://github.com/sormuras/bach/blob/f40133b040a391392ae8ab63eb54126693a1eb58/install-jdk.sh#L189-L191 https://github.com/sormuras/bach/commit/d35b7ddaa5ef9b05141cbfdd45733ff126856b38 https://github.com/sormuras/bach/issues/62

[sormuras]

Ah, ok.

install-jdk.sh shouldn't be called for JDK versions below 9 at all, and for 9 to 14 (as of today) only for non-production related tasks. See https://travis-ci.community/t/java-jdk-on-travis-ci/1380 for details.

[joschi]

install-jdk.sh shouldn't be called for JDK versions below 9 at all, and for 9 to 14 (as of today) only for non-production related tasks.

That's something which Travis CI has to fix or make very clear that OpenJDK 8 is not supported on the Ubuntu Focal build environment out of the box. 😉

[hnarayanan]

I understand that this is not working out of the box, but could someone point me to any working instructions on how to setup OpenJDK 8 on Focal. Nearly everything I've tried appears to be out-of-date documentation.

[joschi]

@hnarayanan You could install Zulu Community as described here: https://docs.azul.com/zulu/zuludocs/ZuluUserGuide/PrepareZuluPlatform/AttachAPTRepositoryUbuntuOrDebianSys.htm

[hnarayanan]

Thank you. I went with a different approach and document the solution below in case it helps anyone. In the following example, I am trying to set up an older Java for an older elasticsearch. In .travis.yml:

before_install:
  - sudo apt-get install -y openjdk-8-jdk
before_script:
  - echo JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64 | sudo tee -a /etc/default/elasticsearch

Alternatively you can just export JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64 or add it to your path before your scripts.

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