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java.lang.UnsupportedOperationException: 	at org.bukkit.event.server.ServerListPingEvent.iterator(ServerListPingEvent.java:140)	at com.earth2me.essentials.EssentialsServerListener.onServerListPing(EssentialsServerListener.java:22)	at sun.reflect.GeneratedMethodAccessor360.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)	at java.lang.reflect.Method.invoke(Unknown Source)	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:334)	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:507)	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:492)	at net.minecraft.server.network.NetHandlerStatusServer.func_147312_a(NetHandlerStatusServer.java:87)	at net.minecraft.network.status.client.C00PacketServerQuery.func_148833_a(SourceFile:25)	at net.minecraft.network.status.client.C00PacketServerQuery.func_148833_a(SourceFile:8)	at net.minecraft.network.NetworkManager.channelRead0(NetworkManager.java:137)	at net.minecraft.network.NetworkManager.channelRead0(NetworkManager.java:353)	at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:98)	at io.netty.channel.DefaultChannelHandlerContext.invokeChannelRead(DefaultChannelHandlerContext.java:337)	at io.netty.channel.DefaultChannelHandlerContext.fireChannelRead(DefaultChannelHandlerContext.java:323)	at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:173)	at io.netty.channel.DefaultChannelHandlerContext.invokeChannelRead(DefaultChannelHandlerContext.java:337)	at io.netty.channel.DefaultChannelHandlerContext.fireChannelRead(DefaultChannelHandlerContext.java:323)	at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:173)	at io.netty.channel.DefaultChannelHandlerContext.invokeChannelRead(DefaultChannelHandlerContext.java:337)	at io.netty.channel.DefaultChannelHandlerContext.fireChannelRead(DefaultChannelHandlerContext.java:323)	at com.comphenix.protocol.compat.netty.independent.NettyChannelInjector$4.channelRead(NettyChannelInjector.java:280)	at io.netty.channel.DefaultChannelHandlerContext.invokeChannelRead(DefaultChannelHandlerContext.java:337)	at io.netty.channel.DefaultChannelHandlerContext.fireChannelRead(DefaultChannelHandlerContext.java:323)	at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:173)	at io.netty.channel.DefaultChannelHandlerContext.invokeChannelRead(DefaultChannelHandlerContext.java:337)	at io.netty.channel.DefaultChannelHandlerContext.fireChannelRead(DefaultChannelHandlerContext.java:323)	at io.netty.handler.timeout.ReadTimeoutHandler.channelRead(ReadTimeoutHandler.java:149)	at io.netty.channel.DefaultChannelHandlerContext.invokeChannelRead(DefaultChannelHandlerContext.java:337)	at io.netty.channel.DefaultChannelHandlerContext.fireChannelRead(DefaultChannelHandlerContext.java:323)	at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:785)	at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:100)	at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:480)	at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:447)	at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:341)	at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:101)	at java.lang.Thread.run(Unknown Source)