When viewing graphs in realtime, undefined variable can be logged for 95th Percentile graphs

[interduo]

2019/11/12 00:32:10 - CMDPHP PHP ERROR NOTICE Backtrace: (/graph_json.php[158]:rrdtool_function_graph(), /lib/rrd.php[1586]:variable_nth_percentile(), /lib/graph_variables.php[430]:nth_percentile(), /lib/graph_variables.php[33]:rrdtool_function_stats(), /lib/graph_variables.php[136]:nth_percentile_fetch_statistics(), /lib/graph_variables.php[208]:CactiErrorHandler())

2019/11/12 00:32:10 - ERROR PHP NOTICE: Undefined index: p95n in file: /var/www/html/cacti/lib/graph_variables.php on line: 208

I dont know how to reproduce that but I found that in error log.

[interduo]

./cacti.log-20191031:2019/10/31 13:49:34 - CMDPHP PHP ERROR NOTICE Backtrace:  (/graph_realtime.php[179]:rrdtool_function_graph(), /lib/rrd.php[1586]:variable_nth_percentile(), /lib/graph_variables.php[430]:nth_percentile(), /lib/graph_variables.php[33]:rrdtool_function_stats(), /lib/graph_variables.php[132]:nth_percentile_fetch_statistics(), /lib/graph_variables.php[149]:CactiErrorHandler())
./cacti.log-20191031:2019/10/31 13:49:34 - ERROR PHP NOTICE: Undefined index: values in file: /var/www/html/cacti/lib/graph_variables.php  on line: 149

And this one also is probbably connected with that issue

[interduo]

I've found that few times more.
More output probably in correct order.

2019/11/12 00:32:10 - ERROR PHP NOTICE: Undefined index: values in file: /var/www/html/cacti/lib/graph_variables.php on line: 149
--
2019/11/12 00:32:10 - CMDPHP PHP ERROR NOTICE Backtrace: (/graph_json.php[158]:rrdtool_function_graph(), /lib/rrd.php[1586]:variable_nth_percentile(), /lib/graph_variables.php[430]:nth_percentile(), /lib/graph_variables.php[33]:rrdtool_function_stats(), /lib/graph_variables.php[136]:nth_percentile_fetch_statistics(), /lib/graph_variables.php[149]:CactiErrorHandler())
2019/11/12 00:32:10 - ERROR PHP NOTICE: Undefined index: values in file: /var/www/html/cacti/lib/graph_variables.php on line: 149
2019/11/12 00:32:10 - CMDPHP PHP ERROR NOTICE Backtrace: (/graph_json.php[158]:rrdtool_function_graph(), /lib/rrd.php[1586]:variable_nth_percentile(), /lib/graph_variables.php[430]:nth_percentile(), /lib/graph_variables.php[33]:rrdtool_function_stats(), /lib/graph_variables.php[132]:nth_percentile_fetch_statistics(), /lib/graph_variables.php[208]:CactiErrorHandler())

[cigamit]

Okay, making a small change in lib/graph_variables.php. Test it.

[cigamit]

You can reproduce by viewing a 95th ptile graph in realtime. Make sure you purge the realtime cache before you test.

[cigamit]

No feedback.

[interduo]

This was resolved by commits. Thanks.