Return code of 127 is out of bounds - plugin may be missing error

[Kevin Keane]

Return code 127 means that Nagios wasn't able to start the plugin 
executable - as you already found out from your googling, it usually 
means that either the plugin is missing altogether, is in a different 
directory from where Nagios expects it, or that it is not executable for 
the nagios user. Note that it could also be permissions on one of the 
directories on the path to the plugin.

In most distributions I have seen, plugins are either in 
/usr/lib/nagios/plugins, or in /usr/lib64/nagios/plugins. Maybe Fruity 
somehow changed the directory from lib64 to lib or vice versa?

You say that some checks are working and some aren't. Find one of the 
plugins that works, and one that doesn't, and compare the permissions 
and file locations.

And finally, if you have turned on one of the hardening mechanisms (such 
as SELinux or AppArmor), a plugin may not be executable even with the 
right permissions.

Since you say it happened when you used Fruity, my first guess is that 
it somehow changed the directory where Nagios looks for plugins.

Fritsch, Kurt wrote:
>
> I inherited a Nagios system and I am by no means an expert in its 
> configuration, so I apologize in advance.
>
> What I have been seeing for the last few days is that some of the 
> services I’m monitoring are returning the following error for every host:
>
> (Return code of 127 is out of bounds - plugin may be missing)
>
> Some services are performing checks just fine, but others (most 
> importantly check_ping) give the above error. I’ve tried googling this 
> and gotten some ideas about file permissions and making sure the 
> Nagios.cfg file points to the directory where the plugins are located, 
> but I can’t seem to get this fixed.
>
> This all started when I was using the Fruity interface to make some 
> host changes and upload them to Nagios, I’m not sure if something got 
> corrupted. The Nagios service starts up without any errors.
>
> Any ideas?
>

-- 
Kevin Keane
Owner
The NetTech
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