Occasionally "Return code of 127 for check of host/service was out of bounds. Make sure the plugin you're trying to run actually exists."

[Morten Guldager]

'Aloha!

This might be common knowledge, but it was new to me, and took me quite a
while to figure out, so i think I better share my experience.

I have a not so small nagios installation, 1795  hosts and 3980 at this holy
moment.... (nagios 3.2.0 on a linux/debian/etch box)

Sometimes my nagios stopped working, and declaring everything to be down,
with a message tomething like these log lines:

Warning: Return code of 127 for check of host 'myhost' was out of bounds.
Make sure the plugin you're trying to run actually exists.
Warning: Return code of 127 for check of service 'myservice' on host
'myhost' was out of bounds. Make sure the plugin you're trying to run
actually exists.

I tracked it down to calls to the plugins were bloated with a huge set of
environment variables, every plugin call where served something that looked
like a big chunk of sibling hosts or services from the same
hostgroup/servicegroup.

The fix were easy, flip the config variable "enable_environment_macros" in
nagios.cfg from 1 to 0.

Reload an be happy.. (and I got a much better performance too)


-- 
/Morten %-)
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