[Xymon] leaking memory, alerts.cfg problems

[Jeremy Laidman]

On 11 September 2014 01:50, Tres Finocchiaro <tres.finocchiaro at gmail.com>
wrote:

> Fantastic, that gets me further.  So it appears to be breaking on my
> Perl-compatible percent-asterisk (%*) in the alert.cfg.  Apparently my
> wildcard is invalid.
>

That's because "%*" is invalid.  The "%" means what follows is a
perl-compatible regular expression (PCRE).  An asterisk in a PCRE means
"zero or more of the preceding symbol".  If there's no preceding symbol,
then the PCRE is invalid.  What you probably mean is "%.*", where the dot
means "any character" and so ".*" means "zero or more of any character".


> I change the line from *HOST=%** to *HOST=** and alerts are working great.
>

This works because you're no longer using an RE, but are matching due to a
special case in the host-matching code, where an asterisk means to match
everything.  But the effect is the same as if you did "%.*".

Should I use *HOST=**, is this the recommended method?  I would assume the
> alert.cfg to have a basic example for "all hosts" but the best I could find
> was the Perl example.
>

Given that "HOST=*" is an undocumented feature, and that it looks like a
glob pattern but isn't, I would recommend you use "HOST=%.*".

J
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