Real Time Graphs may cause invalid index errors

[bmfmancini]

Hey Guys

I have not found another report similar to below

I see the following errors when doing a realtime monitor on a custom graph template

2020/09/02 15:38:01 - CMDPHP PHP ERROR NOTICE Backtrace: (/graph_realtime.php[139]:CactiErrorHandler())
2020/09/02 15:38:01 - ERROR PHP NOTICE: Undefined index: graph_width in file: /var/www/html/cacti/graph_realtime.php on line: 139
2020/09/02 15:38:01 - CMDPHP PHP ERROR NOTICE Backtrace: (/graph_realtime.php[138]:CactiErrorHandler())
2020/09/02 15:38:01 - ERROR PHP NOTICE: Undefined index: graph_height in file: /var/www/html/cacti/graph_realtime.php on line: 138
2020/09/02 15:37:59 - CMDPHP PHP ERROR NOTICE Backtrace: (/graph_realtime.php[139]:CactiErrorHandler())
2020/09/02 15:37:59 - ERROR PHP NOTICE: Undefined index: graph_width in file: /var/www/html/cacti/graph_realtime.php on line: 139
2020/09/02 15:37:59 - CMDPHP PHP ERROR NOTICE Backtrace: (/graph_realtime.php[138]:CactiErrorHandler())

RRD INFO

RRDtool Command:
/bin/rrdtool graph - \
--imgformat=PNG \
--start='1598989380' \
--end='1599075751' \
--pango-markup  \
--title='xxxxx - CPU Usage' \
--vertical-label='percent' \
--slope-mode \
--base=1000 \
--height=200 \
--width=700 \
--tabwidth '40' \
--rigid \
--alt-autoscale-max \
--lower-limit='0' \

[bmfmancini]

Relevant lines

        }

        if (isset_request_var('size') && get_request_var('size') < 100) {
                $graph_data_array['graph_height'] = $graph_data_array['graph_height'] * $size / 100;
                $graph_data_array['graph_width']  = $graph_data_array['graph_width']  * $size / 100;
        }

[bmfmancini]

Checked on 1.2.14 same lines

    if (isset_request_var('size') && get_request_var('size') < 100) {
                $graph_data_array['graph_height'] = $graph_data_array['graph_height'] * $size / 100;
                $graph_data_array['graph_width']  = $graph_data_array['graph_width']  * $size / 100;
        }

[TheWitness]

Looks like the local_graph_id is not being passed into the function, or the graph no longer exists, and realtime is still running. Should be an error image for that.