Error occurred while enabling Multiverse-Core v2.5-b655 (Is it up to date?)
java.lang.OutOfMemoryError: GC overhead limit exceeded
	at org.spigotmc.FlatMap.<init>(FlatMap.java:9) ~[spigot.jar:git-Spigot-1161]
	at org.bukkit.craftbukkit.v1_7_R1.util.LongObjectHashMap.<init>(LongObjectHashMap.java:31) ~[spigot.jar:git-Spigot-1161]
	at net.minecraft.server.v1_7_R1.ChunkProviderServer.<init>(ChunkProviderServer.java:32) ~[spigot.jar:git-Spigot-1161]
	at net.minecraft.server.v1_7_R1.WorldServer.j(WorldServer.java:659) ~[spigot.jar:git-Spigot-1161]
	at net.minecraft.server.v1_7_R1.World.<init>(World.java:203) ~[spigot.jar:git-Spigot-1161]
	at net.minecraft.server.v1_7_R1.WorldServer.<init>(WorldServer.java:51) ~[spigot.jar:git-Spigot-1161]
	at org.bukkit.craftbukkit.v1_7_R1.CraftServer.createWorld(CraftServer.java:757) ~[spigot.jar:git-Spigot-1161]
	at org.bukkit.Bukkit.createWorld(Bukkit.java:228) ~[spigot.jar:git-Spigot-1161]
	at org.bukkit.WorldCreator.createWorld(WorldCreator.java:235) ~[spigot.jar:git-Spigot-1161]
	at com.onarandombox.MultiverseCore.utils.WorldManager.doLoad(WorldManager.java:402) ~[?:?]
	at com.onarandombox.MultiverseCore.utils.WorldManager.doLoad(WorldManager.java:383) ~[?:?]
	at com.onarandombox.MultiverseCore.utils.WorldManager.doLoad(WorldManager.java:359) ~[?:?]
	at com.onarandombox.MultiverseCore.utils.WorldManager.loadWorlds(WorldManager.java:657) ~[?:?]
	at com.onarandombox.MultiverseCore.MultiverseCore.onEnable(MultiverseCore.java:307) ~[?:?]
	at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:217) ~[spigot.jar:git-Spigot-1161]
	at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:457) [spigot.jar:git-Spigot-1161]
	at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:382) [spigot.jar:git-Spigot-1161]
	at org.bukkit.craftbukkit.v1_7_R1.CraftServer.loadPlugin(CraftServer.java:302) [spigot.jar:git-Spigot-1161]
	at org.bukkit.craftbukkit.v1_7_R1.CraftServer.enablePlugins(CraftServer.java:284) [spigot.jar:git-Spigot-1161]
	at net.minecraft.server.v1_7_R1.MinecraftServer.m(MinecraftServer.java:338) [spigot.jar:git-Spigot-1161]
	at net.minecraft.server.v1_7_R1.MinecraftServer.g(MinecraftServer.java:315) [spigot.jar:git-Spigot-1161]
	at net.minecraft.server.v1_7_R1.MinecraftServer.a(MinecraftServer.java:275) [spigot.jar:git-Spigot-1161]
	at net.minecraft.server.v1_7_R1.DedicatedServer.init(DedicatedServer.java:184) [spigot.jar:git-Spigot-1161]
	at net.minecraft.server.v1_7_R1.MinecraftServer.run(MinecraftServer.java:420) [spigot.jar:git-Spigot-1161]
	at net.minecraft.server.v1_7_R1.ThreadServerApplication.run(SourceFile:617) [spigot.jar:git-Spigot-1161]