Startup Issue with Minecraft - Unable to start Server after changing mod and forge versions

[Jayden_Smith]

System Information

Field	Value
Operating System	Linux - Debian GNU/Linux 12 on x86_64
Product	AMP ‘Phobos’ v2.6.0.6 (Mainline)
Virtualization	Docker
Application	Minecraft
Module	MinecraftModule
Running in Container	Yes
Current State	Failed

Problem Description

Issue

I changed the version of the mod and the version of java and now the server cannot start. Everytime i try i am met with the same message: “The Minecraft server stopped within 5 seconds of starting, this is not a fault with AMP - you should check your Minecraft servers log files to find out why it is unable to start.”.

Reproduction Steps

• change forge version
• Change mod to match version
• Update server

[ThePotatoKing]

you should check your Minecraft servers log files to find out why it is unable to start

(read the log, and that’ll tell you why it won’t start)

[Jayden_Smith]

do i look at latest log, debug or the dated one?

[ThePotatoKing]

The console and/or logs/latest.log will tell you what’s going on

[Jayden_Smith]

this is latest log
[20Jan2025 02:38:02.348] [main/INFO] [cpw.mods.modlauncher.Launcher/MODLAUNCHER]: ModLauncher running: args [–gameDir, ., --launchTarget, fmlserver, --fml.forgeVersion, 36.2.34, --fml.mcpVersion, 20210115.111550, --fml.mcVersion, 1.16.5, --fml.forgeGroup, net.minecraftforge, nogui]
[20Jan2025 02:38:02.356] [main/INFO] [cpw.mods.modlauncher.Launcher/MODLAUNCHER]: ModLauncher 8.1.3+8.1.3+main-8.1.x.c94d18ec starting: java version 21.0.4 by Eclipse Adoptium

this is from console

Exception in thread “main” java.lang.IllegalAccessError: class cpw.mods.modlauncher.SecureJarHandler (in unnamed module @0x5b8bc155) cannot access class sun.security.util.ManifestEntryVerifier (in module java.base) because module java.base does not export sun.security.util to unnamed module @0x5b8bc155

[ThePotatoKing]

You need to use Java 8 or Java 11 with 1.16.5