I've got problem while I code minecraft plugin with kotlin. Here's error message:
[12:37:07 ERROR]: Error occurred while enabling WorkAndGambling v1.0-SNAPSHOT (Is it up to date?)
java.lang.ExceptionInInitializerError: null
at io.github.buudd.wag.Main.onEnable(Main.kt:10) ~[WorkAndGambling.jar:?]
at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:264) ~[patched_1.17.1.jar:git-Paper-352]
at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:370) ~[patched_1.17.1.jar:git-Paper-352]
at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:500) ~[patched_1.17.1.jar:git-Paper-352]
at org.bukkit.craftbukkit.v1_17_R1.CraftServer.enablePlugin(CraftServer.java:561) ~[patched_1.17.1.jar:git-Paper-352]
at org.bukkit.craftbukkit.v1_17_R1.CraftServer.enablePlugins(CraftServer.java:475) ~[patched_1.17.1.jar:git-Paper-352]
at net.minecraft.server.MinecraftServer.loadWorld(MinecraftServer.java:730) ~[patched_1.17.1.jar:git-Paper-352]
at net.minecraft.server.dedicated.DedicatedServer.initServer(DedicatedServer.java:317) ~[patched_1.17.1.jar:git-Paper-352]
at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1217) ~[patched_1.17.1.jar:git-Paper-352]
at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:319) ~[patched_1.17.1.jar:git-Paper-352]
at java.lang.Thread.run(Thread.java:831) ~[?:?]
Caused by: java.lang.IllegalArgumentException: Plugin already initialized!
at org.bukkit.plugin.java.PluginClassLoader.initialize(PluginClassLoader.java:229) ~[patched_1.17.1.jar:git-Paper-352]
at org.bukkit.plugin.java.JavaPlugin.<init>(JavaPlugin.java:53) ~[patched_1.17.1.jar:git-Paper-352]
at io.github.buudd.wag.Main.<init>(Main.kt:7) ~[WorkAndGambling.jar:?]
at io.github.buudd.wag.FunctionsKt.<clinit>(functions.kt:12) ~[WorkAndGambling.jar:?]
... 11 more
Caused by: java.lang.IllegalStateException: Initial initialization
at org.bukkit.plugin.java.PluginClassLoader.initialize(PluginClassLoader.java:232) ~[patched_1.17.1.jar:git-Paper-352]
at org.bukkit.plugin.java.JavaPlugin.<init>(JavaPlugin.java:53) ~[patched_1.17.1.jar:git-Paper-352]
at io.github.buudd.wag.Main.<init>(Main.kt:7) ~[WorkAndGambling.jar:?]
at jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[?:?]
at jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:78) ~[?:?]
at jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[?:?]
at java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:499) ~[?:?]
at java.lang.reflect.ReflectAccess.newInstance(ReflectAccess.java:128) ~[?:?]
at jdk.internal.reflect.ReflectionFactory.newInstance(ReflectionFactory.java:350) ~[?:?]
at java.lang.Class.newInstance(Class.java:642) ~[?:?]
at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:83) ~[patched_1.17.1.jar:git-Paper-352]
at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:153) ~[patched_1.17.1.jar:git-Paper-352]
at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:414) ~[patched_1.17.1.jar:git-Paper-352]
at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:322) ~[patched_1.17.1.jar:git-Paper-352]
at org.bukkit.craftbukkit.v1_17_R1.CraftServer.loadPlugins(CraftServer.java:419) ~[patched_1.17.1.jar:git-Paper-352]
at net.minecraft.server.dedicated.DedicatedServer.initServer(DedicatedServer.java:287) ~[patched_1.17.1.jar:git-Paper-352]
... 3 more
I noticed that error occured at Main.kt, line 10. And that was loadConfig() function. So, I looked Functions.kt:
package io.github.buudd.wag
import org.bukkit.configuration.file.YamlConfiguration
import io.github.buudd.wag.Variables.cfile
import io.github.buudd.wag.Variables.file
fun loadConfig() {
cfile = YamlConfiguration.loadConfiguration(file)
try {
if (!file.exists()) {
cfile!!.save(file)
}
cfile!!.load(file)
} catch (localException: Exception) {
localException.printStackTrace()
}
}
And variables. Variables.kt:
import org.bukkit.configuration.file.YamlConfiguration
import org.bukkit.plugin.java.JavaPlugin
import java.io.*
import java.util.*
object Variables {
private val plugin: JavaPlugin = Main()
var moneyMap: MutableMap<UUID?, Int?> = mutableMapOf(null to null)
var joinMap: MutableMap<UUID?, Int?> = mutableMapOf(null to null)
val file: File = File("plugins/WorkAndGambling/config.yml")
var cfile: YamlConfiguration? = null
}
Main.kt
package io.github.buudd.wag
import io.github.buudd.wag.commands.WAGcommand
import io.github.buudd.wag.listener.Listeners
import org.bukkit.plugin.java.JavaPlugin
class Main : JavaPlugin() {
override fun onEnable() {
logger.info("Enabling...")
loadConfig()
getCommand("sell")?.apply {
setExecutor(WAGcommand(this@Main))
tabCompleter = WAGcommand(this@Main)
}
server.pluginManager.registerEvents(Listeners(), this)
}
override fun onDisable() {
logger.info("Disabling...")
}
}
But, I cannot find why error occured. Sorry if this code's problem is just my mistake.
CodePudding user response：
The plugin is already enabled.
This can be caused because :
- The same plugin is already on the server, but with another JAR name
To fix it, just remove the old jar.
- Another plugin use the same name
To fix it, go in plugin.yml and change name variable.
- You creating a new instance of this plugin, and
JavaPlugininterface creating a new one. This is caused inVariablesclass. How to fix it ?
You should set the instance as static, go transfer it in method parameter/constructor.
Example of "instance as static" :
companion object {
lateinit var plugin: Main
}
override fun onEnable() {
plugin = this;
}
Example of "Transfer in param/constructor" :
It depend of how you are using this variable. You seems to already do it for the class WAGcommand.
PS: I'm a Java spigot developer, so maybe there is issue in kotlin code.