graphs works 1/3 of the time after power failure

[chromosome]

Hello, i have and old debian lenny with cacti version 0.8.7b. which graphs mainly traffic and packets from switches and wireless devices. After power failure and improper shutdown of the machine all the graphs for the last hosts i have entered began to show strange behavior. Total there are about 50 host and for the first 35 there is no problem, but for the rest the graphs works only for about 7 hours, and then for about 21 hours the graphs are empty... and then again for 7 hours graphs are OK and then again 21 hours empty...



For example in the log i see:

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05/07/2013 03:35:56 PM - POLLER: Poller[0] CACTI2RRD: /usr/bin/rrdtool update /var/lib/cacti/rra/3550rog2_traffic_in_1759.rrd --template traffic_out:traffic_in 1367930155:2417638968:1381550495

but looks like the file isn`t touched at all

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192 -rw-r--r-- 1 www-data www-data 188744 2013-05-07 00:10 3550rog2_traffic_in_1759.rrd

or when i create new graph in the empty period the result from debug mode is

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ERROR: opening '/var/lib/cacti/rra/rog2test_traffic_in_1959.rrd': No such file or directory

and when the 7 hours time arrives the graph start to show normal ...

[gandalf]

Please see 2nd link of my sig. You will find, among others, a hint to redirect poller output to a log file. This will tell you more about possible failures during rrd file updates
R.