nagios missing valid updates from nsca

[Marc Powell]

> -----Original Message-----
> From: nagios-users-admin at lists.sourceforge.net [mailto:nagios-users-
> admin at lists.sourceforge.net] On Behalf Of Chris Hale
> Sent: Monday, March 07, 2005 3:29 PM
> To: nagios-users at lists.sourceforge.net
> Subject: [Nagios-users] nagios missing valid updates from nsca
> 
> We are in the process of switching from full active checks, to mostly
> passive checks.
> 
> I've so far converted 129 services checks for 19 hosts.
> 
> But I've already got concerns.  Occasionally all passive checks for
any
> one
> or more of the hosts we have switched, fails the freshness threshold.
> 
> I've set NC_Net client to send every 5 minutes, and set the freshness
> threshold to 6 minutes.  I've confirmed that NSCA has received the
results
> by turning on debug and seeing the results show up in the syslog.  But
> Nagios acts like it never got the result, and I see the freshness
check
> warnings in the Nagios event log.  I can't seem to find any pattern to
the
> missing checks, but when it does miss... it seems to miss all the
checks
> from that host all together.
> 
> 12:11 - missed all 7 passive check from one host.
> 12:16 - missed all 7 passive checks from two separate hosts
> 12:21 - all 7 passive check from one host.
> 12:40 - all 7 passive check from one host.
> 12:41 - all 7 passive check from one host.
> 
> In all the above examples... each failure was a different host, and
all
> were
> found in syslog as NSCA received them fine.
> 
> Notables from the NSCA config file:
> aggregrate_write=1  tried both... neither seem to affect it
> append_to_file=0    the notes on this one, make me not want to mess
with
> it
> max_packet_age=240
>    I hope that if this is the culprit, that it would warn you in the
> syslog
> 
> Notables from nagios.cfg file:
> command_check_interval=-1
> 
> I not sure if anything else in the Nagios config is relevant to
passive
> check processing (with the exception of all the other settings that
> wouldn't
> make passive checks work at all)
> 
> What should I check here folks?
> 
> p.s. note that the finished conversion should more than double the
amount
> of
> passive checks being processed every 5 minutes.  So if there is
anything
> else I should be looking out for, in regards to capacity.  Let me
know.

I don't use freshness checking but FWIW, I'm processing 2750+ passive
checks every 5 minutes here with room to spare. As far as I can tell the
only difference is I don't aggregate_write's with nsca. Is nagios busy
doing other things, specifically active host checks on downed hosts?
Also are there any hardware problems on your central machine? I had a
bad raid controller once that appeared to be working but resulted in
long delays in processing the passive results. Once I replaced it
everything improved dramatically.

--
Marc


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