Have we reached some kind of Nagios limit?

[Frost, Mark {BIS}]

Thanks, Sven.  I'm almost certain you're correct.  For some reason I had thought that when I turned on large_installation_tweaks some time ago that environment variables were turned off.   However, now I see that it only turns off summary macros.   Not sure how I misinterpreted that.

So it would make sense that in the case of this particular collection of hosts and services that Nagios was probably creating such a large set of environment variables that it was perhaps overriding a shell limit and preventing the exec'd check from properly executing.  I did some preliminary tests and turning that off cleared things up.  And of course, in addition to fixing this issue, I believe I'm going to get a performance boost (or at least a resource usage drop) as an added bonus.

Unfortunately the only place I do currently use environment variables is with several event scripts.   Changing those scripts to use command-line variables is proving to be rather a pain in the butt given how many variables I have them check.   But I'm getting there.

Thanks very much for your help!

Mark

-----Original Message-----
From: Sven Nierlein [mailto:Sven.Nierlein at consol.de] 
Sent: Saturday, February 18, 2012 2:05 PM
To: Nagios Users List
Subject: Re: [Nagios-users] Have we reached some kind of Nagios limit?

On 2/18/12 18:48, Frost, Mark {BIS} wrote:
> ...
> I added maybe 5 of these new hosts, ran the pre-flight check and restarted.  After the restart I started noticing that our failing service checks (for all services) went from around 260 to over 4K.  All of those new failing checks were only on hosts of this same type (that particular application on Windows servers I mentioned above which is also what these new hosts were part of) and they were all reporting the same failure condition:
> (Return code of 127 is out of bounds - plugin may be missing)
> ...
> What can I do?

Disable environment macros. You hit the limit of maximum length of a new shell command which can be pretty huge when using env macros.
Its strongly advised to turn them off when using mklivestatus anyway.

  Sven

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