Solved Plugin already initialized!

Hi everybody,

I've been making a plugin for a quite long time but I didn't want to test it for some reason, so now, when it's done, I launch it and server throws:

Code:

org.bukkit.plugin.InvalidPluginException: java.lang.IllegalArgumentException: Plugin already initialized!

I just wonder what that means and what should my mistake look like.
Thank you

Here's the whole error:

Code:

[13:29:11 ERROR]: Could not load 'plugins\PonyPlugin0.3.jar' in folder 'plugins'
 
org.bukkit.plugin.InvalidPluginException: java.lang.IllegalArgumentException: Pl
ugin already initialized!
        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.j
ava:137) ~[craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
        at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.
java:313) ~[craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
        at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager
.java:236) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
        at org.bukkit.craftbukkit.v1_7_R1.CraftServer.loadPlugins(CraftServer.ja
va:350) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
        at org.bukkit.craftbukkit.v1_7_R1.CraftServer.<init>(CraftServer.java:31
2) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
        at net.minecraft.server.v1_7_R1.PlayerList.<init>(PlayerList.java:63) [c
raftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
        at net.minecraft.server.v1_7_R1.DedicatedPlayerList.<init>(SourceFile:14
) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
        at net.minecraft.server.v1_7_R1.DedicatedServer.init(DedicatedServer.jav
a:126) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
        at net.minecraft.server.v1_7_R1.MinecraftServer.run(MinecraftServer.java
:424) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
        at net.minecraft.server.v1_7_R1.ThreadServerApplication.run(SourceFile:6
17) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
Caused by: java.lang.IllegalArgumentException: Plugin already initialized!
        at org.bukkit.plugin.java.PluginClassLoader.initialize(PluginClassLoader
.java:98) ~[craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
        at org.bukkit.plugin.java.JavaPlugin.<init>(JavaPlugin.java:59) ~[craftb
ukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
        at iwcs.pony.Main.<init>(Main.java:32) ~[?:?]
        at iwcs.pony.Database.<init>(Database.java:18) ~[?:?]
        at iwcs.pony.Main.<init>(Main.java:34) ~[?:?]
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
~[?:1.8.0_25]
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
~[?:1.8.0_25]
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Sou
rce) ~[?:1.8.0_25]
        at java.lang.reflect.Constructor.newInstance(Unknown Source) ~[?:1.8.0_2
5]
        at java.lang.Class.newInstance(Unknown Source) ~[?:1.8.0_25]
        at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.jav
a:52) ~[craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.j
ava:133) ~[craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
        ... 9 more
Caused by: java.lang.IllegalStateException: Initial initialization
        at org.bukkit.plugin.java.PluginClassLoader.initialize(PluginClassLoader
.java:101) ~[craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
        at org.bukkit.plugin.java.JavaPlugin.<init>(JavaPlugin.java:59) ~[craftb
ukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
        at iwcs.pony.Main.<init>(Main.java:32) ~[?:?]
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
~[?:1.8.0_25]
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
~[?:1.8.0_25]
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Sou
rce) ~[?:1.8.0_25]
        at java.lang.reflect.Constructor.newInstance(Unknown Source) ~[?:1.8.0_2
5]
        at java.lang.Class.newInstance(Unknown Source) ~[?:1.8.0_25]
        at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.jav
a:52) ~[craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.j
ava:133) ~[craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
        ... 9 more

 

OLEGSHA
You most likely have two instances of the same plugin on your server
(e.g, Plugin 1-0.jar && Plugin 2-0.jar)

 

OLEGSHA if you have something like this in your listener(s) class Main mc = new Main(); thats whats causing your problem. All you need to do is take the code in your listener class except for Main mc = new Main(); and put into your main class just remember to to put "implements Listener" in your main class after "extends JavaPlugin".

 

Well, here are the plugins:
- Essentials
- PcColoredSigns
- PonyPlugin0.3 (the one that doesn't launch)
- WorldEdit
- WorldGuard

YML:

Code:

name: PonyPlugin
main: iwcs.pony.Main
author: OLEGSHA
description: PonyPlugin adds pony classes from MLP:FiM cartoon
version: 0.3
commands:
  pony:
      description: Pony management command
      usage: /<command> <ponyType|current|default|help>
  ponyplgn:
      description: Admin version of /pony command
      usage: /<command> <get|set|reset|gerror|getraw|setraw|totalreset|savedata|reload> [extra args...]
  cast:
      description: Command to cast unicorn spells
      usage: /<command> <hjump|regen|haste|nregen|clear>

Code (zipped Eclipse project) is attached

 

OLEGSHA This could also be caused by having two of the same plugin on your server.

 

Here's code on pastebin:
Class Main:
http://pastebin.com/snbS2URw
Class Database:
http://pastebin.com/zSyHFZ7F
Class Util:
http://pastebin.com/0Z5qtuiv

And no, I don't have any other plugins by the same name!
Well, I can't imagine myself a plugin with main class iwcs.pony.Main

 

Yep, in the last two:

private Main Main = new Main();

Remove those, or it'll cause problems.

 

OLEGSHA Yep like i said you can do the "new" thing to the listeners but not the main class it will just create another same class file of your main class and the duplicate has "extends JavaPlugin" and now the console is getting confused on which one is the main class file.

 

AKZOBIE74

Perhaps, but the solution to this is certainly not just putting everything in the main class.

 

mythbusterma but thats what i had to do in one of my plugins.

 

So, does that mean that I should make only one class per package? I need to get the database FileConfiguration from the main class, so how do I do it if I mustn't use Main class in any other classes?

 

OLEGSHA

Please, don't listen to him. He doesn't know what he's talking about.

You'd be best off learning Java before you try to write plugins, but if you absolutely must know:

Simply create a constructor in the dependant class that takes an instance of your main class as an argument, then initialize your dependant class from the main class with the main class as the argument. Then you can access any public methods of JavaPlugin from that class.