Bukkit Login Error

09:47:13 [SEVERE] java.io.IOException: An existing connection was forcibly
closed by the remote host
09:47:13 [SEVERE]       at sun.nio.ch.SocketDispatcher.read0(Native Method)

09:47:13 [SEVERE]       at sun.nio.ch.SocketDispatcher.read(Unknown Source)

09:47:13 [SEVERE]       at sun.nio.ch.IOUtil.readIntoNativeBuffer(Unknown S
ource)
09:47:13 [SEVERE]       at sun.nio.ch.IOUtil.read(Unknown Source)
09:47:13 [SEVERE]       at sun.nio.ch.SocketChannelImpl.read(Unknown Source
)
09:47:13 [SEVERE]       at io.netty.buffer.PooledUnsafeDirectByteBuf.setByt
es(PooledUnsafeDirectByteBuf.java:259)
09:47:13 [SEVERE]       at io.netty.buffer.AbstractByteBuf.writeBytes(Abstr
actByteBuf.java:885)
09:47:13 [SEVERE]       at io.netty.channel.socket.nio.NioSocketChannel.doR
eadBytes(NioSocketChannel.java:226)
09:47:13 [SEVERE]       at io.netty.channel.nio.AbstractNioByteChannel$NioB
yteUnsafe.read(AbstractNioByteChannel.java:72)
09:47:13 [SEVERE]       at io.netty.channel.nio.NioEventLoop.processSelecte
dKey(NioEventLoop.java:460)
09:47:13 [SEVERE]       at io.netty.channel.nio.NioEventLoop.processSelecte
dKeys(NioEventLoop.java:424)
09:47:13 [SEVERE]       at io.netty.channel.nio.NioEventLoop.run(NioEventLo
op.java:360)
09:47:13 [SEVERE]       at io.netty.util.concurrent.SingleThreadEventExecut
or$2.run(SingleThreadEventExecutor.java:103)
09:47:13 [SEVERE]       at java.lang.Thread.run(Unknown Source)