Startup Issue with Minecraft - GTNH Server unable to start

Technical Support
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1

System Information

Field Value
Operating System Linux - Debian GNU/Linux 13 on x86_64
Product AMP ‘Phobos’ v2.6.4.2 (Mainline)
Virtualization Docker
Application Minecraft
Module MinecraftModule
Running in Container Yes
Current State Failed

Problem Description

Issue

The server fails to start after following a couple guides online, I have ensured the correct forge and java version, added the additional java options and set the correct server jar.

Reproduction Steps

  • Create new instance
  • Upload GTNH Server files
  • Follow steps provided by ThePotatoKing in his article
  • Server fail to start
2

Can i please have the console log pretty please with a cherry on top

3

I apologies i forgot to add the console log!

OpenJDK 64-Bit Server VM warning: Archived non-system classes are disabled because the java.system.class.loader property is specified (value = “com.gtnewhorizons.retrofuturabootstrap.RfbSystemClassLoader”). To use archived non-system classes, this property must not be set

Error occurred during initialization of VM

java.lang.Error: com.gtnewhorizons.retrofuturabootstrap.RfbSystemClassLoader

at java.lang.ClassLoader.initSystemClassLoader(java.base@17.0.17/ClassLoader.java:2000)

at java.lang.System.initPhase3(java.base@17.0.17/System.java:2263)

Caused by: java.lang.ClassNotFoundException: com.gtnewhorizons.retrofuturabootstrap.RfbSystemClassLoader

at jdk.internal.loader.BuiltinClassLoader.loadClass(java.base@17.0.17/BuiltinClassLoader.java:641)

at jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(java.base@17.0.17/ClassLoaders.java:188)

at java.lang.ClassLoader.loadClass(java.base@17.0.17/ClassLoader.java:525)

at java.lang.Class.forName0(java.base@17.0.17/Native Method)

at java.lang.Class.forName(java.base@17.0.17/Class.java:469)

at java.lang.ClassLoader.initSystemClassLoader(java.base@17.0.17/ClassLoader.java:1986)

at java.lang.System.initPhase3(java.base@17.0.17/System.java:2263)

Thanks for any help lads

4

GTNH requires some specific Java arguments and requires you to select the patched Jar:
https://discourse.cubecoders.com/t/setting-up-a-modded-java-minecraft-server/26535#p-50642-h-323-gtnh-40

5

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