What is the error here

I Was testing my plugin and i ran into some error's

Console

Code:

---- Minecraft Crash Report ----
// I just don't know what went wrong :(
 
Time: 28/04/13 4:30 PM
Description: Exception in server tick loop
 
java.lang.NullPointerException
    at net.minecraft.server.v1_5_R1.DedicatedServer.am(DedicatedServer.java:257)
    at net.minecraft.server.v1_5_R1.DedicatedServer.a(DedicatedServer.java:203)
    at net.minecraft.server.v1_5_R1.MinecraftServer.run(MinecraftServer.java:416)
    at net.minecraft.server.v1_5_R1.ThreadServerApplication.run(SourceFile:573)
 
 
A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------
 
-- System Details --
Details:
    Minecraft Version: 1.5
    Operating System: Windows 8 (x86) version 6.2
    Java Version: 1.7.0_21, Oracle Corporation
    Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
    Memory: 992146576 bytes (946 MB) / 1037959168 bytes (989 MB) up to 1037959168 bytes (989 MB)
    JVM Flags: 2 total; -Xms1024M -Xmx1024M
    AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
    Suspicious classes: [net.minecraft.server.v1_5_R1.ICommandListener, IMojangStatistics, IDataManager, ...], [org.bukkit.World, BlockChangeDelegate, Server], [org.bukkit.block.BlockState], [org.bukkit.command.CommandSender, RemoteConsoleCommandSender], [org.bukkit.configuration.serialization.ConfigurationSerializable], [org.bukkit.craftbukkit.Main], [org.bukkit.craftbukkit.libs.jline.TerminalFactory, Terminal, Flavor, ...], [org.bukkit.craftbukkit.libs.jline.console.ConsoleReader, CursorBuffer, ConsoleKeys, ...], [org.bukkit.craftbukkit.libs.jline.console.completer.CompletionHandler, CandidateListCompletionHandler], [org.bukkit.craftbukkit.libs.jline.console.history.History, MemoryHistory], [org.bukkit.craftbukkit.libs.jline.internal.InputStreamReader, Configuration, Log], [org.bukkit.craftbukkit.libs.joptsimple.OptionException, OptionParser, OptionSpec, ...], [org.bukkit.craftbukkit.libs.joptsimple.internal.AbbreviationMap, ReflectionException, Reflection, ...], [org.bukkit.craftbukkit.v1_5_R1.LoggerOutputStream], [org.bukkit.craftbukkit.v1_5_R1.inventory.CraftItemStack, CraftRecipe, CraftShapedRecipe, ...], [org.bukkit.craftbukkit.v1_5_R1.potion.CraftPotionEffectType], [org.bukkit.craftbukkit.v1_5_R1.util.Waitable, ServerShutdownThread, TerminalConsoleHandler, ...], [org.bukkit.entity.Entity], [org.bukkit.event.Event, Cancellable, HandlerList, ...], [org.bukkit.event.block.BlockEvent, BlockFadeEvent, BlockGrowEvent, ...], [org.bukkit.event.entity.EntityEvent, EntityInteractEvent, EntityDamageEvent, ...], [org.bukkit.event.hanging.HangingEvent, HangingPlaceEvent], [org.bukkit.event.painting.PaintingEvent, PaintingPlaceEvent], [org.bukkit.event.player.PlayerEvent, PlayerInteractEvent, PlayerFishEvent], [org.bukkit.event.server.ServerEvent, MapInitializeEvent, ServerCommandEvent], [org.bukkit.event.world.WorldEvent, WorldSaveEvent, WorldInitEvent, ...], [org.bukkit.inventory.ItemStack, Recipe, ShapedRecipe, ...], [org.bukkit.map.MapView], [org.bukkit.metadata.Metadatable], [org.bukkit.permissions.ServerOperator, Permissible], [org.bukkit.plugin.messaging.PluginMessageRecipient], [org.bukkit.potion.PotionEffectType, PotionEffectTypeWrapper], [org.fusesource.hawtjni.runtime.Library], [org.fusesource.jansi.AnsiOutputStream, WindowsAnsiOutputStream, AnsiConsole, ...], [org.fusesource.jansi.internal.Kernel32, CONSOLE_SCREEN_BUFFER_INFO, COORD, ...]
    IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
    CraftBukkit Information:
  Running:
  Failed to handle CraftCrashReport:
java.lang.NullPointerException
    at org.bukkit.Bukkit.getName(Bukkit.java:68)
    at org.bukkit.craftbukkit.v1_5_R1.CraftCrashReport.call(CraftCrashReport.java:20)
    at net.minecraft.server.v1_5_R1.CrashReportSystemDetails.a(SourceFile:74)
    at net.minecraft.server.v1_5_R1.CrashReport.h(CrashReport.java:41)
    at net.minecraft.server.v1_5_R1.CrashReport.<init>(CrashReport.java:28)
    at net.minecraft.server.v1_5_R1.MinecraftServer.run(MinecraftServer.java:426)
    at net.minecraft.server.v1_5_R1.ThreadServerApplication.run(SourceFile:573)
 
    Profiler Position: N/A (disabled)
    Is Modded: Definitely; Server brand changed to 'craftbukkit'
    Type: Dedicated Server (map_server.txt)

Main plugin class

Code:

package frostpvp;
 
import org.bukkit.Material;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.player.PlayerJoinEvent;
import org.bukkit.plugin.java.JavaPlugin;
import org.bukkit.inventory.ItemStack;
 
public class FrostPvp extends JavaPlugin implements Listener {
    /**
    *
    */
    @Override
    public void onDisable() {
        // TODO: Place any custom disable code here.
    }
 
    @Override
    public void onEnable() {
        getServer().getPluginManager().registerEvents(this, this);
    }
 
    @EventHandler
    public void onPlayerJoin(PlayerJoinEvent event) {
        event.getPlayer().sendMessage("Welcome to this Server Hope you have a good time, " + event.getPlayer().getDisplayName() + "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
    }
 
    /**
    *
    * @param sender
    * @param cmd
    * @param label
    * @param args
    * @return
    */
    @Override
   
    public boolean onCommand(CommandSender sender, Command cmd, String label, String[] args){
    if(cmd.getName().equalsIgnoreCase("archer")){ // If the player typed /archer then do the following...
        if (sender instanceof Player) {
              Player player = (Player) sender;
              player.sendMessage("ArcherCommand!");
              player.getInventory().addItem(new ItemStack(Material.DIAMOND_SWORD,1 ));
                    }
                    return false;
                   
                    }
                return false;
}
}

plugin.yml

Code:

name: FrostPvp
main: FrostPvp.FrostPvp
version: 1.0
 
commands:
  archer:
    description: gives player an archer kit
    permission: frostpvp.kits.archer
    usage: just type /archer
 
  pvp:
    description: gives player a pvp kit
    permission: frostpvp.kits.pvp
    usage: just type /pvp (requires FrostPvp.kits.pvp)
 
  endermage:
    description: gives player a endermage kit
    permission: frostpvp.kits.endermage
    usage: just type /archer
 
  stomper:
    description: gives player a stomper kit
    permission: frostpvp.kits.stomper
    usage: just type /stomper
   
  fisherman:
    description: gives player a fisherman kit
    permission: frostpvp.kits.fisherman
    usage: just type /fisherman
     
  superman:
    description: gives player a superman kit
    permission: frostpvp.kits.superman
    usage: just type /superman

so what is making this error

As you can see in the plugin main class all the plugin has to do is load the plugin.yml archer file and then give me a sword

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

 

That's a crash and it doesn't seem to point to your plugin. Have you tested more than one time ? Does the server actually crash or do you have errors in console, those would be useful.

 

It's not caused by your plugin.
Try redownloading craftbukkit.

 

Off topic:

MCPVP kits, how original.

 

i just get error's in the console. And i tested it 2 times and it still has error's

ya as a matter of fact i think i had downloaded a beta craftbukkit build

also you may want to fix the setting_up_aserver page cause i click download latest recommended build and it gave me craftbukkit-1.4.7-r1.0.jar

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

 

That is the latest recommended build. There's nothing wrong with that page.

 

ya found that out after posting it.
anyway back on topic i was reading the error in the console and it says the plugin does not have a plugin.yml but im 99.9% sure that if you hit the hammer in netbeans it will put the hole project in the jar

 

zombieman1000
Open the jar with an archive program to be sure that it's there, it needs to be in the root.

 

Digi i looked in the folder frostpvp and there was frostpvp.class and plugin.yml

 

zombieman1000
The plugin.yml must be outside of that folder, in the root.

Also I suggest you use more descriptive package naming... "me.zombieman1000.frostPVP" for example, if it overlaps with other packages you'll have silent issues.

 

Digi now in the jar file i got Frostpvp folder (took the jar out) Meta-INF and the plugin.yml is that correct

 

zombieman1000
Should be, why don't you just test it ? :}

 

Digi i did but im still getting error's

 

zombieman1000
Then why didn't you say that ? And is it the same error or ... just post the error from the console.