I am setting up a new lan server that I just formatted to Linux Mint 19 Cinnamon 64bit with no customization.
I created a new folder and copied in the installer Jar files :
minecraft_server.1.12.2.jar
forge-1.12.2-14.23.4.2749-installer.jar
Ran the vanilla jar with no errors completed first world spawn.
Forge installServer ran with no errors.
Trying to run the universal.jar gives the following error:
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:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
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: java.base/jdk.internal.loader.ClassLoaders$AppClassLoader cannot be cast to java.base/java.net.URLClassLoader
at net.minecraft.launchwrapper.Launch.<init>(Launch.java:34)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
... 6 more
command line : sudo java -jar forge-1.12.2-14.23.4.2749-universal.jar nogui
tried with memory switches , without sudo and without nogui, all had same error.
universal.jar was initially not executable. corrected with chmod
No log files are being generated.
folder contents:
libraries
logs
banned-ips.json
minecraft_server.1.12.2.jar
banned-players.json
ops.json
eula.txt
server.properties
forge-1.12.2-14.23.4.2749-installer.jar
usercache.json
forge-1.12.2-14.23.4.2749-installer.jar.log
whitelist.json
forge-1.12.2-14.23.4.2749-universal.jar
world
