Temurin-build: Provide JRE packages in addition to JDK packages

[DanHeidinga]

There was a request at OpenJ9 to provide JRE packages in addition to JDK packages: https://github.com/eclipse/openj9/issues/1438

I think this is a great idea and would be beneficial if we could provide both packages. Many deployments on need the JRE, not the full JDK.

For JDK9 this might just be a re-jlink of the SDK into the JRE configuration. Likely more work for JDK8.

[karianna]

I'd hope we could produce this as part of our pipeline. I know you can produce both a JRE and JDK from the make, need to dig in what make images currently does ( I think it actually provides both.)

[DanHeidinga]

For JDK8, make images creates both a JRE and a JDK:

$ /build/build/linux-x86_64-normal-server-release/images# ls
_strip_jdk  _strip_jre  j2re-image  j2sdk-image  lib  sec-bin.zip  src  src.zip  symbols

[DanHeidinga]

I see a JRE package as being more important for Java 8 than for later releases as Java 9+ can use jlink to create a stripped runtime.

[DanHeidinga]

Looking at a jdk10 build built with build images I see both a jdk and jre directory so this may not require any additional builds beyond what's already done.

[sxa]

For JDK8, make images creates both a JRE and a JDK:

Hmmm they're not showing up in our build directories (e.g. https://ci.adoptopenjdk.net/job/openjdk8_openj9_build_x86-64_linux/ws/openjdk/) and that does claim from the log to be executing make images

[karianna]

@sxa555 Is that a OpenJ9 vs Hotspot build difference?

[sxa]

@karianna No it's not in the hotspot build at https://ci.adoptopenjdk.net/job/openjdk8_build_x86-64_linux/ws/openjdk/ either. Will need some investigation I feel.

[sxa]

Ahhh we seem to have a j2re-image directory under openjdk/build/linux-x86_64-normal-server-release/images in the workspace so hopefully this won't be too difficult. We currently rename the j2sdk-image directory to something that matches the bulid name e.g. jdk8u172-b03 but leave the j2re-image directory as-is ... Will continue to work this.

[ceejatec]

Why was this closed? There are still no JRE downloads available...

[gdams]

@ceejatec the website is hosting JDK and JRE packages and has been for a while

[ceejatec]

@gdams I've been hunting around https://adoptopenjdk.net/ for a while and I can't find any... am I missing something obvious?

[yamadamn]

@ceejatec You can download both JDK and JRE for OpenJDK 8 from https://adoptopenjdk.net/releases.html?variant=openjdk8&jvmVariant=hotspot
JRE are still not hosted for OpenJDK 11 with HotSpot, but instead, JRE are already hosted for OpenJDK11 with OpenJ9.

[ceejatec]

@yamadamn I could have sworn that wasn't there last night! And at the moment it does appear that there ARE HotSpot OpenJDK 11 JRE packages. Although the naming convention befuddles me - under jdk-11.0.1+13, the JRE download is https://github.com/AdoptOpenJDK/openjdk11-binaries/releases/download/jdk-11%2B28/OpenJDK11-jre_x64_linux_hotspot_11_28.tar.gz ... any idea what 11_28 is? Is that build in fact the "same JRE" as JDK 11.0.1+13 ?....

[yamadamn]

@ceejatec I think 11_28 means "11GA build 28"; so, it's not same as 11.0.1+13.
You can see in the archive or tag as below.
https://adoptopenjdk.net/archive.html?variant=openjdk11&jvmVariant=hotspot
https://github.com/AdoptOpenJDK/openjdk11-binaries/releases/tag/jdk-11%2B28

Is your concern related to #796? If so, you'd better to comment in #796.

[justinmahar]

It seems some of the JDK downloads have a companion JRE, some don't. If there's a particular JDK with no JRE available for download, you can use the following tool to create one easily using jlink:

https://justinmahar.github.io/easyjre/

This will give you the jlink command you need to create a standard JRE for any JDK, and allows you to customize the command from there.

[030]

Could this issue be reopened? Oracle used to provide always a JRE for download. In my opinion this should be done as well as this can be automated. I personally prefer this as I do not want to do manual labor for every new release.

[karianna]

We do provide JRE packages, I'm not sure what's missing?

[030]

@karianna I misunderstood. Now I found the JRE https://adoptopenjdk.net/releases.html#x64_linux

[noelmcloughlin]

This is UI misdirection mind game ;-) A google search brought me here.

The attention of new visitors is diverted to word jdk on the left - a heading. So we visually search for heading with word jre on the left but it cannot be found. Not very obvious UI.

[aahlenst]

@noelmcloughlin Please file a new issue on https://github.com/adoptopenjdk/openjdk-website/issues.

[sxa]

Bear in mind it's questionable whether we wouldwish to do anythign about this - the name displayed on the web site is based on the tag in the openjdk project which is jdk8u252-b09 for example - it's how the project names their code tags. So we are producing JDKs and JREs based on the source code at that tag. While I understand the confusion it would be rather odd to change the label shown on the web site (especially given the label is the name of the github repo)