I have this error

17:10:12 [SEVERE] [OldKohi] <-> InitialHandler - encountered exception
io.netty.handler.codec.DecoderException: java.lang.IndexOutOfBoundsException: readerIndex(6) + length(2147483642) exceeds writerIndex(6): SlicedAbstractByteBuf(ridx: 6, widx: 6, cap: 6/6, unwrapped: PooledUnsafeDirectByteBuf(ridx: 7, widx: 7, cap: 1024))
at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:99)
at...

I have this error