The game now requires Java 17 instead of Java 16.

[binhex]

The game now requires Java 17 instead of Java 16.

[binhex]

I am not sure if it will break it. I would assume it was backwards compatible. If you are concerned, is there a way to make 17 optional?

this is tricky, latest is named that for a reason as i cannot tell what version will be available as the upstream base os changes the java version, all i have is 8, 11, and now, 17, im going to just go for it i think and take the hit for any breakage as it sounds like the next version of minecraft requires java 17 in any case!.

[BobTheCoder42]

From logs/screen.log
Error: LinkageError occurred while loading main class net.minecraft.bundler.Main
java.lang.UnsupportedClassVersionError: net/minecraft/bundler/Main has been compiled by a more recent version of the Java Runtime (class file version 61.0), this version of the Java Runtime only recognizes class file versions up to 60.0

[BobTheCoder42]

CUSTOM_JAR_PATH is set to the latest pre-release. Permissions and ownership were set to match the server.jar included in the container. Pre-release 1 still works (before their MC updated their java version)

[BobTheCoder42]

From the unraid docker log
2021-11-18 07:33:40.991618 [info] CUSTOM_JAR_PATH defined as '/config/minecraft/minecraft_server-1.18-pre2.jar'
2021-11-18 07:33:46.893976 [info] JAVA_VERSION defined as '17'
2021-11-18 07:33:46.908932 [warn] Java version '17' not valid, defaulting to Java version 'latest

[binhex]

OK i can certainly rebuild the image which will then bump up the version of java to 17, i guess my only concern is will Java 17 break the existing official release of minecraft (as in v1.17.1) as that is currently built for Java 16?.

[BobTheCoder42]

I am not sure if it will break it. I would assume it was backwards compatible. If you are concerned, is there a way to make 17 optional?

[BobTheCoder42]

Also, they announced 1.18 would be released on the Nov 30th. Maybe you can have a PR version of this template? Then merge that in once they release...

[BobTheCoder42]

Thank you! I just pulled the latest and it's working.