Help with: My server will not recognize my plugin.

I had my plugin working for a while and now my server will not recognize it! When I type /plugins it
does not appear in the list of plugins. How do I fix this?

...But on my test server it works.

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

make sure your plugin.yml is configured correctly. Post a pastebin link of this if you can

 

mabey you have an outdated version , or the methods used in it are outdated

 

ahuby09 But its the same version.

 

Robotbuilder Check to make sure there are no errors in the server startup.

 

I am going to bet you that if you look in the console, you are going to find an error during startup that relates to your plugin. Please post here and we can help you out.
Robotbuilder

 

Ok. Thanks for all the responses! I will post the contents of the plugin.yml file for it when I can access to my PC.

Here is my plugin.yml:

Code:

name: SimpleClear
author: Robotbuilder
version: 1.0.0
description: This is a custom plugin for HyperBlock.
main: net.redstonecity.robotbuilder.Main
commands:
  csc:
    description: Custom Clear inventory plugin.
  

amhokies Tehmaker

Here is my error on start up:

[08:11:26 ERROR]: Could not load 'plugins\SimpleClear.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: java.lang.IllegalArgumentException: Pl
ugin already initialized!

I hope you guys can understand the error because I cannot

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

Robotbuilder The plugin is loaded more than once. If you don't have any of the same plugin, please post your full code.

 

Robotbuilder AdamQpzm
Or another one, he is creating a new instance of the main class as such:

Code:java

Main main = new Main();

 

AdamQpzm Ok, So you think I put the two of the same plugin in the plugins folder?

I will post the code for my main class as well as the complete server startup as soon as I can.

 

I do not have the two of the same plugin in the plugins folder at once.

So it goes like this: SimpleClear\src\my_package\main.java

Here is all my code for my "main" class:

Code:java

package net.redstonecity.robotbuilder;
 
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;
import org.bukkit.plugin.java.JavaPlugin;
import org.bukkit.potion.PotionEffect;
 
 
 
/*
 
This plugin is a custom plugin for the HyperBlock server.
 
 
 
Author: robotbuilder with help from lots of others on the bukkit forums.
 
*/
 
 
 
public class Main extends JavaPlugin {
 
 
 
public void onEnable() {
 
getLogger().info("Simple Clear Enabled!");
 
 
 
}
 
 
 
public void onDisable() {
 
getLogger().info("Simple Clear Enabled");
 
}
 
 
public boolean onCommand(CommandSender sender, Command cmd, String label, String[] args) {
 
if (cmd.getName().equalsIgnoreCase("hub") || cmd.getName().equalsIgnoreCase("spawn") ) {
 
Player player = (Player) sender;
 
 
org.bukkit.inventory.PlayerInventory inv = player.getInventory();
 
inv.setArmorContents(null); //remove the armour in the armour slots
 
for (int i = 1; i != 8; i++) //clear slots 2 - 8 on the hotbar
inv.setItem(i, null);
 
for(PotionEffect pe : player.getActivePotionEffects()) { //remove all potion effects
player.removePotionEffect(pe.getType());
 
}
 
for (int i = 9; i < inv.getSize(); i++) //clear everything else that is not on the hotbar
inv.setItem(i, null);
 
}
 
return true;
}
 
 
}
 

 

Potential stupid question (I'm no Java god.) do you have any other plugins you've made using that package with Main as the primary class? If so there's your problem I believe.

 

that is all the code nothing ommitted?

 

Can you post the full error?

 

moose517 That is all the code for my main class.

Konkz Here is the full error:
[10:27:23] [Server thread/ERROR]: Could not load 'plugins\SimpleClear.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: java.lang.IllegalArgumentException: Plugin already initialized!
at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:137) ~[craftbukkit-1.7.2-R0.3.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:313) ~[craftbukkit-1.7.2-R0.3.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:236) [craftbukkit-1.7.2-R0.3.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
at org.bukkit.craftbukkit.v1_7_R1.CraftServer.loadPlugins(CraftServer.java:350) [craftbukkit-1.7.2-R0.3.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
at org.bukkit.craftbukkit.v1_7_R1.CraftServer.<init>(CraftServer.java:312) [craftbukkit-1.7.2-R0.3.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
at net.minecraft.server.v1_7_R1.PlayerList.<init>(PlayerList.java:63) [craftbukkit-1.7.2-R0.3.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
at net.minecraft.server.v1_7_R1.DedicatedPlayerList.<init>(SourceFile:14) [craftbukkit-1.7.2-R0.3.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
at net.minecraft.server.v1_7_R1.DedicatedServer.init(DedicatedServer.java:126) [craftbukkit-1.7.2-R0.3.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
at net.minecraft.server.v1_7_R1.MinecraftServer.run(MinecraftServer.java:424) [craftbukkit-1.7.2-R0.3.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
at net.minecraft.server.v1_7_R1.ThreadServerApplication.run(SourceFile:617) [craftbukkit-1.7.2-R0.3.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-1.7.2-R0.3.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
at org.bukkit.plugin.java.JavaPlugin.<init>(JavaPlugin.java:59) ~[craftbukkit-1.7.2-R0.3.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
at net.redstonecity.robotbuilder.Main.<init>(Main.java:23) ~[?:?]
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[?:1.7.0_45]
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) ~[?:1.7.0_45]
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) ~[?:1.7.0_45]
at java.lang.reflect.Constructor.newInstance(Unknown Source) ~[?:1.7.0_45]
at java.lang.Class.newInstance(Unknown Source) ~[?:1.7.0_45]
at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:52) ~[craftbukkit-1.7.2-R0.3.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:133) ~[craftbukkit-1.7.2-R0.3.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-1.7.2-R0.3.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
at org.bukkit.plugin.java.JavaPlugin.<init>(JavaPlugin.java:59) ~[craftbukkit-1.7.2-R0.3.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
at net.redstonecity.robotbuilder.Main.<init>(Main.java:23) ~[?:?]
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[?:1.7.0_45]
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) ~[?:1.7.0_45]
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) ~[?:1.7.0_45]
at java.lang.reflect.Constructor.newInstance(Unknown Source) ~[?:1.7.0_45]
at java.lang.Class.newInstance(Unknown Source) ~[?:1.7.0_45]
at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:52) ~[craftbukkit-1.7.2-R0.3.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:133) ~[craftbukkit-1.7.2-R0.3.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
... 9 more
[10:27:23] [Thread-8/INFO]: ----- Bukkit Auto Updater -----
[10:27:23] [Thread-8/INFO]: It appears that you're running a Beta Build, when you've specified in bukkit.yml that you prefer to run Recommended Builds.
[10:27:23] [Thread-8/INFO]: If you would like to be kept informed about new Beta Build releases, it is recommended that you change 'preferred-channel' in your bukkit.yml to 'beta'.
[10:27:23] [Thread-8/INFO]: With that set, you will be told whenever a new version is available for download, so that you can always keep up to date and secure with the latest fixes.
[10:27:23] [Thread-8/INFO]: If you would like to disable this warning, simply set 'suggest-channels' to false in bukkit.yml.

 

Robotbuilder Can we see the code for your other classes please?

 

AdamQpzm That is the code for my only class: main

charries96 Its not a stupid question. I have been using that main class just for the plugin 'SimpleClear', not for any other plugins.

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

Works for me. Make sure you don't have the same plugin, just renamed. Also make sure it looks like this :

net.redstonecity.robotbuilder.Main

 

Here is a download to the full project:
https://www.dropbox.com/s/e7i5b7ons5k6qu8/Simple_Clear.zip

This should help you fix my problem.

 

Robotbuilder The error is caused because you are trying to create a new instance when your plugin is already initialized (You are calling Main instance = new Main() somewhere), you are not able to create new instances this way, since Bukkit tries to keep only one instance of your plugin.

 

Ravada ...Ok so you downloaded it and tested it out? I named it "SimpleClear2", that might fix something.

xTigerRebornx... so how do I fix it? Sorry I am a newbie

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

Robotbuilder Question, do you have any other plugins made by you when you ran your plugin? If so, then the error is caused because 2 of your plugins both have their Main class located in the same place (net.redstonecity.robotbuilder.Main)
You need to give each plugin a unique location for their main classes (I.E. net.redstonecity.robotbuilder.plugin1.Main and net.redstonecity.robotbuilder.plugin2.Main) otherwise it will throw out these errors

 

xTigerRebornx Yes I do have another plugin made by me.

 

Robotbuilder Read through the rest of the post. My guess is that the plugins share the same location for their main class (net.redstonecity.robotbuilder.Main) and Bukkit won't allow it, since it thinks its the same plugin.

 

xTigerRebornx I tried naming the package: net.redstonecity.robotbuilder.SimpleClear, but it still will not register.

 

Robotbuilder Show me what the error is when you change the package and the plugin.yml

 

Yes it actually worked! I just forgot to change the package in plugin.yml!

...but my command does not work :C. I typed in the 'hub' command and it says it doesn't recognize the command.

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

@Roboticbuilder this is what I was trying to get at

 

is that defined in your plugin.yml? If not then there's your problem, if it is then I have absolutely no clue I'm afraid!

 

charries96 Yes I probably did not define it, but I cannot check right. Why did I forget to do that? Forgetful me.

One question... Can I define multiple commands with the same onCommand() method in the same class.

Like this:

public boolean onCommand(CommandSender sender, Command cmd, String label, String[] args) {

if (cmd.getName().equalsIgnoreCase("hub") ) {

//Do something when the command 'hub' is run.

}

if (cmd.getName.equalsIgnoreCase("cci") {

//Do something when the command 'cci' is run.

{

I would like to thank everyone who helped me with this! I will give everyone who helped likes! Thanks for helping!

EDIT by Moderator: merged posts, please use the edit button instead of double posting.