[Nut-upsuser] occassional problem wtih upslog and apc ups units via snmp ... [NA] status

Bob Brown bbrown at harpercollege.edu
Thu Aug 13 16:45:44 UTC 2015

Os is redhat enterprise, kernel 2.6.18-164.2.1.e15
NUT is apparently 2.4.1
It was installed by tar.

Monitoring a lot of apc UPS units-mostly Smart-UPS of various flavors, also a Silcon DP380E.

Normally works just fine...  "upslog" writes status log every 30 seconds with various parameters..

Every so often, one of the UPS units has a log entry of:


When it normally looks like:


What does it mean when it  puts NA in the log file?

Recently we had an incident when all of our UPS units, (around 71 of them) got 2 NA records, all at about the same time...we are trying to figure out root cause.

Any ideas on what may cause this kind of behavior?

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