java.lang.NoSuchFieldError: spawnX
        at com.earth2me.essentials.Spawn.getSpawn(Spawn.java:100)
        at com.earth2me.essentials.spawn.EssentialsSpawnPlayerListener.onPlayerR
espawn(EssentialsSpawnPlayerListener.java:16)
        at org.bukkit.plugin.java.JavaPluginLoader$3.execute(JavaPluginLoader.ja
va:140)
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.jav
a:59)
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.j
ava:225)
        at net.minecraft.server.ServerConfigurationManager.d(ServerConfiguration
Manager.java:182)
        at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:754)
        at net.minecraft.server.Packet9Respawn.a(SourceFile:10)
        at net.minecraft.server.NetworkManager.a(SourceFile:230)
        at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:70)
        at net.minecraft.server.NetworkListenThread.a(SourceFile:100)
        at net.minecraft.server.MinecraftServer.h(MinecraftServer.java:338)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:253)
        at net.minecraft.server.ThreadServerApplication.run(SourceFile:366)


Code that calls it:

String worldId = config.getString(group + ".world", "");
		World world = server.getWorlds().get(server.getWorlds().size() > 1 ? 1 : 0);
		for (World w : server.getWorlds())
		{
			if (w.getEnvironment() != Environment.NORMAL) continue;
			world = w;
			break;
		}
		for (World w : server.getWorlds())
		{
			if (!w.getName().equals(worldId)) continue;
			world = w;
			break;
		}

		//WorldServer wh = ((CraftWorld)world).getHandle();

		double x = config.getDouble(group + ".x", config.getDouble("default.x", 0)); // wh.spawnX
		double y = config.getDouble(group + ".y", config.getDouble("default.y", 128)); // wh.spawnY
		double z = config.getDouble(group + ".z", config.getDouble("default.z", 0)); // wh.spawnZ
		float yaw = (float)config.getDouble(group + ".yaw", config.getDouble("default.yaw", 0));
		float pitch = (float)config.getDouble(group + ".pitch", config.getDouble("default.pitch", 0));
		return new Location(world, x, y, z, yaw, pitch);