Forge Server Log May 9 ConcurrentModificationException

java.io.IOException: Connection reset by peer
        at sun.nio.ch.FileDispatcherImpl.read0(Native Method) ~[?:1.7.0_45]
        at sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:39) ~[?:1.7.0]
        at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:223) ~[?:1.7.0_45]
        at sun.nio.ch.IOUtil.read(IOUtil.java:192) ~[?:1.7.0_45]
        at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:379) ~[?:1.]
        at io.netty.buffer.UnpooledUnsafeDirectByteBuf.setBytes(UnpooledUnsafeD]
        at io.netty.buffer.AbstractByteBuf.writeBytes(AbstractByteBuf.java:870)]
        at io.netty.channel.socket.nio.NioSocketChannel.doReadBytes(NioSocketCh]
        at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(Abstr]
        at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.ja]
        at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEv]
        at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:341) [NioEve]
        at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThrea]
        at java.lang.Thread.run(Thread.java:744) [?:1.7.0_45]
[13:14:32] [Server thread/INFO]: MastaC729 lost connection: TranslatableCompone}
[13:14:32] [Server thread/INFO]: MastaC729 left the game