Startup Issue with Minecraft - After patch, 2.7.2AMP cannot start 26.2

Technical Support
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System Information

Field Value
Operating System Linux - Debian GNU/Linux 13 on x86_64
Product AMP ‘Deimos’ v2.7.2.0 (Mainline)
Virtualization Docker
Application Minecraft
Module MinecraftModule
Running in Container Yes
Current State Failed

Problem Description

Issue

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 69.0), this version of the Java Runtime only recognizes class file versions up to 65.0

I can’t find any newer minecraft_server.jar or java runtimes available, how can I get this running correctly?

Reproduction Steps

    1. Upgrade from main page
    1. Attempt to start
    1. Console log vbnet 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 69.0), this version of the Java Runtime only recognizes class file versions up to 65.0
    1. Downgrade from latest snapshot to latest release
    1. Attempt to find newer .jar or java runtime in AMP
1 Like
2

I had this issue and set my java back to 21, tried to start server again, then went back and changed to 25 and it seemed to do the trick.

1 Like
3

Perfect, this solution worked!

1 Like
4

thank you very much friends