My forge Minecraft server doesn't start, It keep giving these errors:

Exception in thread "main" org.spongepowered.asm.mixin.transformer.throwables.MixinTransformerError: An unexpected critical error was encountered
        at MC-BOOTSTRAP/org.spongepowered.mixin/org.spongepowered.asm.mixin.transformer.MixinProcessor.applyMixins(MixinProcessor.java:392)
        at MC-BOOTSTRAP/org.spongepowered.mixin/org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClass(MixinTransformer.java:250)
        at MC-BOOTSTRAP/org.spongepowered.mixin/org.spongepowered.asm.service.modlauncher.MixinTransformationHandler.processClass(MixinTransformationHandler.java:131)
        at MC-BOOTSTRAP/org.spongepowered.mixin/org.spongepowered.asm.launch.MixinLaunchPluginLegacy.processClass(MixinLaunchPluginLegacy.java:131)
        at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.serviceapi.ILaunchPluginService.processClassWithFlags(ILaunchPluginService.java:156)
        at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.LaunchPluginHandler.offerClassNodeToPlugins(LaunchPluginHandler.java:88)
        at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.ClassTransformer.transform(ClassTransformer.java:120)
        at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.TransformingClassLoader.maybeTransformClassBytes(TransformingClassLoader.java:50)
        at [email protected]/cpw.mods.cl.ModuleClassLoader.readerToClass(ModuleClassLoader.java:110)
        at [email protected]/cpw.mods.cl.ModuleClassLoader.lambda$findClass$16(ModuleClassLoader.java:216)
        at [email protected]/cpw.mods.cl.ModuleClassLoader.loadFromModule(ModuleClassLoader.java:226)
        at [email protected]/cpw.mods.cl.ModuleClassLoader.findClass(ModuleClassLoader.java:216)
        at [email protected]/cpw.mods.cl.ModuleClassLoader.loadClass(ModuleClassLoader.java:132)
        at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:526)
        at java.base/java.lang.Class.getDeclaredMethods0(Native Method)
        at java.base/java.lang.Class.privateGetDeclaredMethods(Class.java:3578)
        at java.base/java.lang.Class.getMethodsRecursive(Class.java:3719)
        at java.base/java.lang.Class.getMethod0(Class.java:3705)
        at java.base/java.lang.Class.getMethod(Class.java:2393)
        at MC-BOOTSTRAP/[email protected]/net.minecraftforge.fml.loading.targets.CommonServerLaunchHandler.lambda$launchService$0(CommonServerLaunchHandler.java:32)
        at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37)
        at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:53)
        at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:71)
        at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.Launcher.run(Launcher.java:106)
        at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.Launcher.main(Launcher.java:77)
        at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:26)
        at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:23)
        at [email protected]/cpw.mods.bootstraplauncher.BootstrapLauncher.main(BootstrapLauncher.java:149)
Caused by: org.spongepowered.asm.mixin.throwables.ClassMetadataNotFoundException: java.util.concurrent.CompletableFuture
        at MC-BOOTSTRAP/org.spongepowered.mixin/org.spongepowered.asm.mixin.transformer.MixinPreProcessorStandard.transformMethod(MixinPreProcessorStandard.java:754)
        at MC-BOOTSTRAP/org.spongepowered.mixin/org.spongepowered.asm.mixin.transformer.MixinPreProcessorStandard.transform(MixinPreProcessorStandard.java:739)
        at MC-BOOTSTRAP/org.spongepowered.mixin/org.spongepowered.asm.mixin.transformer.MixinPreProcessorStandard.attach(MixinPreProcessorStandard.java:310)
        at MC-BOOTSTRAP/org.spongepowered.mixin/org.spongepowered.asm.mixin.transformer.MixinPreProcessorStandard.createContextFor(MixinPreProcessorStandard.java:280)
        at MC-BOOTSTRAP/org.spongepowered.mixin/org.spongepowered.asm.mixin.transformer.MixinInfo.createContextFor(MixinInfo.java:1288)
        at MC-BOOTSTRAP/org.spongepowered.mixin/org.spongepowered.asm.mixin.transformer.MixinApplicatorStandard.apply(MixinApplicatorStandard.java:292)
        at MC-BOOTSTRAP/org.spongepowered.mixin/org.spongepowered.asm.mixin.transformer.TargetClassContext.apply(TargetClassContext.java:383)
        at MC-BOOTSTRAP/org.spongepowered.mixin/org.spongepowered.asm.mixin.transformer.TargetClassContext.applyMixins(TargetClassContext.java:365)
        at MC-BOOTSTRAP/org.spongepowered.mixin/org.spongepowered.asm.mixin.transformer.MixinProcessor.applyMixins(MixinProcessor.java:363)
        ... 27 more

I use java 17.0.9 SE
I also used the create+ modpack for 1.18.2

(witch is the server version)

Add the full crash-report or latest.log (logs-folder) with sites like https://paste.ee/ and paste the link to it here

The full latest log:

https://paste.ee/p/lfEVx

 

The server is using Java 21

Remove Java 21 or set the path to the java 17 javaw.exe in your start script

Sorry, First time could you tell me where i could set the path or remove Java 21.

 

In your start.bat/run.bat should be something like
 

java -Xmx4G -Xms2048M -jar forge-1.18.2.jar
pause

Replace the word java with the path to the Java 17 installation

For example:
 

"C:\Program Files\Java\jdk-17.0.9\bin\javaw.exe" -Xmx4G -Xms2048M -jar forge-1.18.2.jar
pause

Just make sure the path is correct and keep the quotation marks

I have my information such as Xms and Xmx in my user_jvn_args.txt

 

Will the example work in there?

Edited January 14, 20241 yr by coolbacon

You just have to replace the world "java" with the path to the java 17 installation like described above - this does not affect the other arguments

ive pasted it in and checked where the javaw.exe is and for some reason after pasting in the right place forge still cant find it
Error:
Error: Could not find or load main class C:Program FilesJavajdk-17.0.9binjavaw.exe
Caused by: java.lang.ClassNotFoundException: C:Program FilesJavajdk-17.0.9binjavaw.exe

Add the lines of your start script

 

For some reason my files don't have the ability for me to edit them in run.bat so i cant add the command and when ever i try to put the command in user_jvn_args.txt it cant find it.

 

Do you mean for me to open the run.bat in a script editor?

 

Open it with a text editor, copy all lines and paste it here

Oh i am stupid,

 

REM Forge requires a configured set of both JVM and program arguments.
REM Add custom JVM arguments to the user_jvm_args.txt
REM Add custom program arguments {such as nogui} to this file in the next line before the %* or
REM  pass them to this script directly
java @user_jvm_args.txt @libraries/net/minecraftforge/forge/1.18.2-40.2.0/win_args.txt %*
pause

Change the lower part from

 

java @user_jvm_args.txt @libraries/net/minecraftforge/forge/1.18.2-40.2.0/win_args.txt %*
pause

to

 

"C:\Program Files\Java\jdk-17.0.9\bin\javaw.exe" @user_jvm_args.txt @libraries/net/minecraftforge/forge/1.18.2-40.2.0/win_args.txt %*
pause

 

Now it shows that it has the file correctly and has paused and does nothing

Is there a log file in your server's logs-folder?

No, unfortunately

Change it to
 

"C:\Program Files\Java\jdk-17.0.9\bin\javaw.exe" -Xmx4G @libraries/net/minecraftforge/forge/1.18.2-40.2.0/win_args.txt %*
pause

 

That was odd the windows Command prompt didnt even do anything and then the java terminal pops up, should this happen?  

If this is the server console, then yes

Alright perfect and just one more thing,

I have the max ram it is allowed to use at 8GB but for some reason it thinks it can only use 2GB

Maybe it is 2GB from the allocated RAM?

Check the Task Manager - doe the Java Application use about 8 GB RAM?

It uses 2.217GB

The Xms is set to 2048mb

And the Xmx is set to 8GB

Restart the server and add the log from the logs-folder

Add the log with sites like

https://paste.ee/ and paste the link to it here