Bukkit

What steps will reproduce the problem?
1.  Load StarHunter V1.1 And wait for loading for error
2.
3.

What version of the product are you using?
V1.1

Do you have an error log of what happened?
[17:58:55] [Server thread/ERROR]: Error occurred while enabling StarHunt v1.0 (Is it up to date?)
java.lang.IllegalArgumentException: Plugin already initialized!
    at org.bukkit.plugin.java.PluginClassLoader.initialize(PluginClassLoader.java:98) ~[craftbukkit1.7.jar:git-Bukkit-1.7.2-R0.2-16-gb12f12f-b2996jnks]
    at org.bukkit.plugin.java.JavaPlugin.<init>(JavaPlugin.java:59) ~[craftbukkit1.7.jar:git-Bukkit-1.7.2-R0.2-16-gb12f12f-b2996jnks]
    at StarHunter.StarHunter.<init>(StarHunter.java:27) ~[?:?]
    at StarHunter.fallingblocks.<init>(fallingblocks.java:35) ~[?:?]
    at StarHunter.StarHunter.onEnable(StarHunter.java:44) ~[?:?]
    at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:250) ~[craftbukkit1.7.jar:git-Bukkit-1.7.2-R0.2-16-gb12f12f-b2996jnks]
    at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:350) [craftbukkit1.7.jar:git-Bukkit-1.7.2-R0.2-16-gb12f12f-b2996jnks]
    at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:384) [craftbukkit1.7.jar:git-Bukkit-1.7.2-R0.2-16-gb12f12f-b2996jnks]
    at org.bukkit.craftbukkit.v1_7_R1.CraftServer.loadPlugin(CraftServer.java:300) [craftbukkit1.7.jar:git-Bukkit-1.7.2-R0.2-16-gb12f12f-b2996jnks]
    at org.bukkit.craftbukkit.v1_7_R1.CraftServer.enablePlugins(CraftServer.java:282) [craftbukkit1.7.jar:git-Bukkit-1.7.2-R0.2-16-gb12f12f-b2996jnks]
    at net.minecraft.server.v1_7_R1.MinecraftServer.m(MinecraftServer.java:342) [craftbukkit1.7.jar:git-Bukkit-1.7.2-R0.2-16-gb12f12f-b2996jnks]
    at net.minecraft.server.v1_7_R1.MinecraftServer.g(MinecraftServer.java:319) [craftbukkit1.7.jar:git-Bukkit-1.7.2-R0.2-16-gb12f12f-b2996jnks]
    at net.minecraft.server.v1_7_R1.MinecraftServer.a(MinecraftServer.java:275) [craftbukkit1.7.jar:git-Bukkit-1.7.2-R0.2-16-gb12f12f-b2996jnks]
    at net.minecraft.server.v1_7_R1.DedicatedServer.init(DedicatedServer.java:175) [craftbukkit1.7.jar:git-Bukkit-1.7.2-R0.2-16-gb12f12f-b2996jnks]
    at net.minecraft.server.v1_7_R1.MinecraftServer.run(MinecraftServer.java:424) [craftbukkit1.7.jar:git-Bukkit-1.7.2-R0.2-16-gb12f12f-b2996jnks]
    at net.minecraft.server.v1_7_R1.ThreadServerApplication.run(SourceFile:617) [craftbukkit1.7.jar:git-Bukkit-1.7.2-R0.2-16-gb12f12f-b2996jnks]
Caused by: java.lang.IllegalStateException: Initial initialization
    at org.bukkit.plugin.java.PluginClassLoader.initialize(PluginClassLoader.java:101) ~[craftbukkit1.7.jar:git-Bukkit-1.7.2-R0.2-16-gb12f12f-b2996jnks]
    at org.bukkit.plugin.java.JavaPlugin.<init>(JavaPlugin.java:59) ~[craftbukkit1.7.jar:git-Bukkit-1.7.2-R0.2-16-gb12f12f-b2996jnks]
    at StarHunter.StarHunter.<init>(StarHunter.java:27) ~[?:?]
    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) ~[craftbukkit1.7.jar:git-Bukkit-1.7.2-R0.2-16-gb12f12f-b2996jnks]
    at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:133) ~[craftbukkit1.7.jar:git-Bukkit-1.7.2-R0.2-16-gb12f12f-b2996jnks]
    at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:308) ~[craftbukkit1.7.jar:git-Bukkit-1.7.2-R0.2-16-gb12f12f-b2996jnks]
    at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:231) ~[craftbukkit1.7.jar:git-Bukkit-1.7.2-R0.2-16-gb12f12f-b2996jnks]
    at org.bukkit.craftbukkit.v1_7_R1.CraftServer.loadPlugins(CraftServer.java:257) ~[craftbukkit1.7.jar:git-Bukkit-1.7.2-R0.2-16-gb12f12f-b2996jnks]
    at org.bukkit.craftbukkit.v1_7_R1.CraftServer.<init>(CraftServer.java:235) ~[craftbukkit1.7.jar:git-Bukkit-1.7.2-R0.2-16-gb12f12f-b2996jnks]
    at net.minecraft.server.v1_7_R1.PlayerList.<init>(PlayerList.java:63) ~[craftbukkit1.7.jar:git-Bukkit-1.7.2-R0.2-16-gb12f12f-b2996jnks]
    at net.minecraft.server.v1_7_R1.DedicatedPlayerList.<init>(SourceFile:14) ~[craftbukkit1.7.jar:git-Bukkit-1.7.2-R0.2-16-gb12f12f-b2996jnks]
    at net.minecraft.server.v1_7_R1.DedicatedServer.init(DedicatedServer.java:126) ~[craftbukkit1.7.jar:git-Bukkit-1.7.2-R0.2-16-gb12f12f-b2996jnks]
    ... 2 more

Please provide any additional information below.

Same Error With Spigot and craft bukkit

EDIT: I searced which exact build broke the plugin. For spigot it is B1243 http://ci.md-5.net/job/Spigot/1243/