What is this error :O

Code:java

[18:13:41 ERROR]: Could not load 'plugins/NoFenceGlitch.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: java.lang.IllegalArgumentException: Plugin already initialized!
>      at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:131) ~[spigot-1.7.9.jar:git-Spigot-1484]
>      at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:329) ~[spigot-1.7.9.jar:git-Spigot-1484]
>      at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:251) [spigot-1.7.9.jar:git-Spigot-1484]
>      at org.bukkit.craftbukkit.v1_7_R3.CraftServer.loadPlugins(CraftServer.java:358) [spigot-1.7.9.jar:git-Spigot-1484]
>      at net.minecraft.server.v1_7_R3.DedicatedServer.init(DedicatedServer.java:135) [spigot-1.7.9.jar:git-Spigot-1484]
>      at net.minecraft.server.v1_7_R3.MinecraftServer.run(MinecraftServer.java:457) [spigot-1.7.9.jar:git-Spigot-1484]
>      at net.minecraft.server.v1_7_R3.ThreadServerApplication.run(SourceFile:628) [spigot-1.7.9.jar:git-Spigot-1484]
Caused by: java.lang.IllegalArgumentException: Plugin already initialized!
>      at org.bukkit.plugin.java.PluginClassLoader.initialize(PluginClassLoader.java:98) ~[spigot-1.7.9.jar:git-Spigot-1484]
>      at org.bukkit.plugin.java.JavaPlugin.<init>(JavaPlugin.java:66) ~[spigot-1.7.9.jar:git-Spigot-1484]
>      at me.trevor.bukkit.Main.<init>(Main.java:19) ~[?:?]
>      at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[?:1.7.0_55]
>      at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57) ~[?:1.7.0_55]
>      at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[?:1.7.0_55]
>      at java.lang.reflect.Constructor.newInstance(Constructor.java:526) ~[?:1.7.0_55]
>      at java.lang.Class.newInstance(Class.java:374) ~[?:1.7.0_55]
>      at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:52) ~[spigot-1.7.9.jar:git-Spigot-1484]
>      at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:127) ~[spigot-1.7.9.jar:git-Spigot-1484]
>      ... 6 more
Caused by: java.lang.IllegalStateException: Initial initialization
>      at org.bukkit.plugin.java.PluginClassLoader.initialize(PluginClassLoader.java:101) ~[spigot-1.7.9.jar:git-Spigot-1484]
>      at org.bukkit.plugin.java.JavaPlugin.<init>(JavaPlugin.java:66) ~[spigot-1.7.9.jar:git-Spigot-1484]
>      at me.trevor.bukkit.Main.<init>(Main.java:19) ~[?:?]
>      at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[?:1.7.0_55]
>      at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57) ~[?:1.7.0_55]
>      at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[?:1.7.0_55]
>      at java.lang.reflect.Constructor.newInstance(Constructor.java:526) ~[?:1.7.0_55]
>      at java.lang.Class.newInstance(Class.java:374) ~[?:1.7.0_55]
>      at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:52) ~[spigot-1.7.9.jar:git-Spigot-1484]
>      at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:127) ~[spigot-1.7.9.jar:git-Spigot-1484]
>      ... 6 more
 

 

You probably have more than one

Code:java

class Classname extends JavaPlugin {

 

DotDash nope the plugin itself works fine on my test server but when I put it on my regular server that error appears

 

Does your test server run multiple plugins?

 

The only time I've seen this is when you have a plugin using the same package/main file name. Check to see if any of your plugins share the same main package on your 'regular server'.

 

SmooshCakez thats probably it using me.trevor.bukkit.Main probably isn't the best idea

 

You should always include a unique name in your package structure. Commonly this is the equivalent to the plugin name, or abbreviation.

so instead of com.ringofstorms.Main it would be com.ringofstorms.awesomesauce.Main

I would also recommend using the plugin name for your main class, rather than just main. This is a rather heavy personal preference but most people follow this rule. (Ps, I changed to a shorter abbreviated name in the package)

so it would be "com.ringofstorms.asauce.AwesomeSauce"

 

RingOfStorms ya i kinda realized this now

and BTW SmooshCakez you were right