On my NFSEN system, I recently had a problem where all the current data flows showed "x" on the channels' traffic speed columns.
Also when I ran reports (filter processing), I'd get an error stating an nfdump data file was not found.
stat() error '
path/nfsen/profiles-data/live/ channel/ year/ month/ day/nfcapd. yearmonthdaytime': File not found!
It turned out that at some point I set my TimeZone in the OS, but php/apache did not use the same TimeZone.
In, CentOS, I checked /etc/sysconfig/clock which contained:
However, my /etc/php.ini had nothing set. So I replaced the timezone line with
date.timezone = America/Chicago
Then I restarted apache with:
service httpd restart
Woot, that fixed it!
Your Linux distribution may have different files/paths, but the concept should work the same.