Java 9 Support

[clehene]

Java 9 release is imminent (currently this is set for July 27)

For reference here's the Java 9 migration guide
http://docs.oracle.com/javase/9/migrate/toc.htm#JSMIG-GUID-5657F44A-B2D7-4FB6-AAD7-295AC4533ABC

[sergiofigueras]

+1

[loia]

+1 Java 9 is out!

[sabareeshkkanan]

+1 I tried to install java 9 in alpine but no luck, i tried, jdk, jre and even server jre but i got same exact message . I didnt even try to minify it

/tmp/jdk-9/bin # ./java -version
#
A fatal error has been detected by the Java Runtime Environment:
#
# SIGSEGV (0xb) at pc=0x00007f496de04907, pid=50, tid=51
#
# JRE version: (9.0+181) (build )
# Java VM: Java HotSpot(TM) 64-Bit Server VM (9+181, mixed mode, aot, tiered, compressed oops, g1 gc, linux-amd64)
# Problematic frame:
# V [libjvm.so+0xced907] Threads::create_vm(JavaVMInitArgs*, bool*)+0x267
#
# Core dump will be written. Default location: /tmp/jdk-9/bin/core
#
# An error report file with more information is saved as:
# /tmp/jdk-9/bin/hs_err_pid50.log
#
# If you would like to submit a bug report, please visit:
# http://bugreport.java.com/bugreport/crash.jsp
#

[anapsix]

Yep @sabareeshkkanan, I've encountered same exact issue

[msvab]

Looks like there is early preview for Alpine Linux http://jdk.java.net/9/ea. No idea how stable it is though, but it's good to see native musl branch.

[anapsix]

@msvab sweet.. gotta try using that

[mattnelson]

I tested the JDK9-ea179 alpine distribution a few weeks back. I ran a few containers from this image. I didn't notice any immediate issues, other than needing to add a few exports commands due to the default exported modules. I did try using alpine-3.6 as well, but unfortunately a non passive change was introduced when upgrading busy box that no longer recognizes non-POSIX environment variables.

gliderlabs/docker-alpine#290

FROM alpine:3.5

ENV JAVA_HOME=/opt/jdk \
 PATH=${PATH}:/opt/jdk/bin \
 LANG=C.UTF-8

RUN set -ex && \
 apk add --no-cache bash && \
 wget http://download.java.net/java/jdk9-alpine/archive/179/binaries/jdk-9-ea+179_linux-x64-musl_bin.tar.gz -O jdk.tar.gz && \
 mkdir -p /opt/jdk && \
 tar zxvf jdk.tar.gz -C /opt/jdk --strip-components=1 && \
 rm jdk.tar.gz && \
 rm /opt/jdk/lib/src.zip

[xingxiuyi]

JDK9 has musl version.

download serverjre-9-ea+181_linux-x64-musl_bin.tar.gz from jdk.java.net

java -version:

java version "9-ea"
Java(TM) SE Runtime Environment (build 9-ea+181-alpine-nightly-h6744-20170807)
Java HotSpot(TM) 64-Bit Server VM (build 9-ea+181-alpine-nightly-h6744-20170807, mixed mode)

[clehene]

I've adapted the current Docker but there's more work needed for a good setup.
I worked through:

• Alpine JDK build
• Locale
• DNS caching
• JCE / crypto (not necessary anymore)
• nsswitch

I have the cli history, but it includes all the failed attempts too.

Questions:

• Not clear how musl changes things - I'm guessing some things may require glibc?
• Not yet clear how the modularized JDK aspect would come into play yet.

Related stuff:
https://blogs.oracle.com/developers/official-docker-image-for-oracle-java-and-the-openjdk-roadmap-for-containers

[rvillane]

+1

[bastelfreak]

Hi people, I would love to see an alpine image with java9. Was there any progress in the past month? Can we help somehow?

[sabareeshkkanan]

you can try to build using this early access http://jdk.java.net/9/ea

[anapsix]

added MUSL anapsix/alpine-java:9 and anapsix/alpine-java:9_jdk image tags (see java9 branch)

[Sineaggi]

@anapsix I appreciate the branch as well as the updated images, but I believe you've mixed up the jdk_9 and 9 builds, the 9 are the ones with the jdk and jdk_9 is just the jre 😄