Is it possible that Pie chart (d3.js) is not drawn even if you have values in dataset. When I am refreshing the pages shows but when run for long not

getting machine status-> setting Flag values for machines -> Drawing Pie chart -> Pie chart is displayed continuously -> Flag for machine changes -> Pie Chart not shown -> remaining graphs displayed -> Flag changes again but Graph not shown for the machine, whose flag was changed -> remaining showed according　to the states.