Frequent BufferBuilder Exception thrown

We were playing using the jar server on LAN. Both of us were disconnected every couple of minutes. Not sure if its relevant but we were trying to cross a large ocean.

[11:39:29] [Client thread/FATAL]: Error executing task
java.util.concurrent.ExecutionException: java.lang.IndexOutOfBoundsException: readerIndex(0) + length(1) exceeds writerIndex(0): UnpooledHeapByteBuf(ridx: 0, widx: 0, cap: 104704/104704)
	at java.util.concurrent.FutureTask.report(Unknown Source) ~[?:1.7.0_67]
	at java.util.concurrent.FutureTask.get(Unknown Source) ~[?:1.7.0_67]
	at g.a(SourceFile:46) [15w36d.jar:?]
	at azo.as(SourceFile:921) [15w36d.jar:?]
	at azo.a(SourceFile:378) [15w36d.jar:?]
	at net.minecraft.client.main.Main.main(SourceFile:125) [15w36d.jar:?]
Caused by: java.lang.IndexOutOfBoundsException: readerIndex(0) + length(1) exceeds writerIndex(0): UnpooledHeapByteBuf(ridx: 0, widx: 0, cap: 104704/104704)
	at io.netty.buffer.AbstractByteBuf.checkReadableBytes(AbstractByteBuf.java:1175) ~[netty-all-4.0.23.Final.jar:4.0.23.Final]
	at io.netty.buffer.AbstractByteBuf.readByte(AbstractByteBuf.joava:570) ~[netty-all-4.0.23.Final.jar:4.0.23.Final]
	at em.readByte(SourceFile:663) ~[15w36d.jar:?]
	at aql.a(SourceFile:87) ~[15w36d.jar:?]
	at aqr.a(SourceFile:981) ~[15w36d.jar:?]
	at bhr.a(SourceFile:522) ~[15w36d.jar:?]
	at gp.a(SourceFile:68) ~[15w36d.jar:?]
	at gp.a(SourceFile:11) ~[15w36d.jar:?]
	at fh$1.run(SourceFile:13) ~[15w36d.jar:?]
	at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) ~[?:1.7.0_67]
	at java.util.concurrent.FutureTask.run(Unknown Source) ~[?:1.7.0_67]
	at g.a(SourceFile:45) ~[15w36d.jar:?]
	... 3 more