makes sure that an illegalargumentexception is thrown when the message isnot a alluxio.network.protocol.rpcresponse . concode_field_sep ExpectedException mThrown concode_elem_sep ClientHandler mHandler concode_elem_sep ChannelHandlerContext mContext concode_field_sep void exceptionCaughtClosesContext concode_elem_sep void before concode_elem_sep void channelRead0ResponseReceived concode_elem_sep void addListener