Holes in new graphs only (Cacti 1.2.2 on Linux)

[sgiraldo]

Hello everybody,
I have a strange behavior when I create new graphs. I'm not totally sure, but maybe it started to happens after the last Cacti upgrade (currently 1.2.2). Now graphs shows hole, and it's confirmed by the CSV exported (following) but... if I keep Cacti open and that graph displayed, everything works fine and no holes are shown. Any ideas of what's happening?
Please, don't mind at the graph date, I collected them 1mo ago and then forgot to open the topic on the forum...

Thanks and regards.

2020-10-26 10:30:00,"NaN","NaN","NaN","NaN","inf"
2020-10-26 10:35:00,"NaN","NaN","NaN","NaN","inf"
2020-10-26 10:40:00,"1.9955154480e+07","1.9955154480e+07","1.2346666667e+03","1.2346666667e+03","NaN"
2020-10-26 10:45:00,"1.0727344242e+07","1.0727344242e+07","1.1561027556e+03","1.1561027556e+03","NaN"
2020-10-26 10:50:00,"1.0555173547e+07","1.0555173547e+07","1.1368608177e+03","1.1368608177e+03","NaN"

[cigamit]

Cacti log?

[sgiraldo]

cacti_stderr.log and poller-error.log are empty, nothing particular in cacti.log only: SYSTEM STATS: Time:4.2512 Method:spine Processes:2 Threads:1 Hosts:10 HostsPerProcess:5 DataSources:201 RRDsProcessed:0. Can you please give some hints on what I should look for? Thanks.

[cigamit]

Set your logging to medium, and see what is returning during one of the "blank" spots when it happens. Also, seems like you have Boost enabled. Try disabling it.

[sgiraldo]

Hi, thanks for the hint, actually disabling boost it start to working fine. I have a quite small installation so boost is not strictly necessary, but I will dig about to understand where should be the problem... probably in the max_heap (already fight with this). Just a question, where did you understand that I was using boost? By the log format?

Regards.

[cigamit]

RRDsProcessed:0
That told me you were using boost. I also knew from experience that if the permissions are not set on your RRD files so that the web server process can write to them (during boost On-Demand Updating), then you get gaps in the graphs.

[sgiraldo]

Nice to know. Thanks again for your help!