Excalibur Server Crash

[15:48:48] [Server thread/INFO]: [Tfree77: Given [Holy Sword Excaliber] * 1 to Tfree77]
[15:49:27] [Netty IO #6/ERROR]  [FML]: NetworkDispatcher exception
java.io.IOException: Connection reset by peer
at sun.nio.ch.FileDispatcherImpl.read0(Native Method) ~[?:1.7.0_72]
at sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:39) ~[?:1.7.0_72]
at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:223) ~[?:1.7.0_72]
at sun.nio.ch.IOUtil.read(IOUtil.java:192) ~[?:1.7.0_72]
at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:379) ~[?:1.7.0_72]
at io.netty.buffer.UnpooledUnsafeDirectByteBuf.setBytes(UnpooledUnsafeDirectByteBuf.java:436) ~[UnpooledUnsafeDirectByteBuf.class:?]
at io.netty.buffer.AbstractByteBuf.writeBytes(AbstractByteBuf.java:870) ~[AbstractByteBuf.class:?]
at io.netty.channel.socket.nio.NioSocketChannel.doReadBytes(NioSocketChannel.java:208) ~[NioSocketChannel.class:?]
at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:87) [AbstractNioByteChannel$NioByteUnsafe.class:?]
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:480) [NioEventLoop.class:?]
at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:447) [NioEventLoop.class:?]
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:341) [NioEventLoop.class:?]
at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:101) [SingleThreadEventExecutor$2.class:?]
at java.lang.Thread.run(Thread.java:745) [?:1.7.0_72]