I also have this problem. After deleting all the JSON files in my server folder hoping to reinstall them, i also got the error message
"Internal Exception: io.netty.handler.codec.DecoderException: java.lang.IndexOutOfBoundsException: readerIndex(9) + length(1) exceeds writer Index(9): UnpooledHeapByteBuf(ridx: 9. widx: 9, cap:9)"
When i reverted my world back to 1.8.8 all the signs were full of backslashes and quotation marks as well..
Brian Yuen
I also have this problem. After deleting all the JSON files in my server folder hoping to reinstall them, i also got the error message
"Internal Exception: io.netty.handler.codec.DecoderException: java.lang.IndexOutOfBoundsException: readerIndex(9) + length(1) exceeds writer Index(9): UnpooledHeapByteBuf(ridx: 9. widx: 9, cap:9)"
When i reverted my world back to 1.8.8 all the signs were full of backslashes and quotation marks as well..