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

[Bob Brown]

I see this in syslog:
Aug 12 03:57:22 orion upsd[18274]: Data for UPS [a102-apc-10] is stale - check driver

(one for each UPS).

Then I see a bunch of messages like this:

Aug 12 03:58:02 orion upsd[18274]: write() failed for ::1: Broken pipe
Aug 12 03:58:02 orion snmpd[2872]: Connection from UDP: [127.0.0.1]:50940

And then it returns to normal like this:

Aug 12 03:58:04 orion upsd[18274]: UPS [a102-apc-10] data is no longer stale

Where else can I look to find out what really happened?

-Bob

-----Original Message-----
From: Charles Lepple [mailto:clepple at gmail.com] 
Sent: Thursday, August 13, 2015 9:52 PM
To: Bob Brown
Cc: nut-upsuser at lists.alioth.debian.org
Subject: Re: [Nut-upsuser] occassional problem wtih upslog and apc ups units via snmp ... [NA] status

On Aug 13, 2015, at 12:45 PM, Bob Brown <bbrown at harpercollege.edu> wrote:
> 
> 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:
>  
> 20150812+035542+NA+NA+NA+[NA]+NA+NA+NA
>  
> When it normally looks like:
>  
> 20150813+114309+100.00+115.00+39.00+[OL]+25.00+60.00+1020.00
>  
> What does it mean when it  puts NA in the log file?

Every log interval, each variable is fetched from the server, and if there is an error retrieving that value at that time, "NA" is logged:

https://github.com/networkupstools/nut/blob/master/clients/upslog.c#L203

Since they are all "NA" at the same time, it is likely that there is a communication problem, either between upslog and upsd, or between upsd and the driver. In either case, there is probably a syslog message describing the problem in more detail.

--
Charles Lepple
clepple at gmail