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I get this weird message when I try to set up my own mod server, what to do?

scro_oge
in Support & Bug Reports

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Posted

C:\Users\xyc\Desktop\FS>java -Xmx20480M -Xms20480M -jar server0.jar nogui
A problem occurred running the Server launcher.java.lang.reflect.InvocationTargetException
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:78)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:567)
        at net.minecraftforge.fml.relauncher.ServerLaunchWrapper.run(ServerLaunchWrapper.java:70)
        at net.minecraftforge.fml.relauncher.ServerLaunchWrapper.main(ServerLaunchWrapper.java:34)
Caused by: java.lang.ClassCastException: class jdk.internal.loader.ClassLoaders$AppClassLoader cannot be cast to class java.net.URLClassLoader (jdk.internal.loader.ClassLoaders$AppClassLoader and java.net.URLClassLoader are in module java.base of loader 'bootstrap')
        at net.minecraft.launchwrapper.Launch.<init>(Launch.java:34)
        at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
        ... 6 more

 

I googled it and only see people get "8 more" then "6 more", never seen someone get "6 more" directly

  • Author

I try to install jdk 8 and uninstall jdk 16, but then my pc no longer recognize jar file

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https://forums.minecraftforge.net/topic/100142-i-get-this-weird-message-when-i-try-to-set-up-my-own-mod-server-what-to-do/
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