ePN error

[Patrick Proy]

Hi,

I agree with S. Hopcroft, it must be a script error. 
I suspect that you use performance output (-k option) : is it the case ?
Could you send the options you use with the script ? (command + service
definition ?) and the return of the script with -v option using these
options.

Patrick
http://www.manubulon.com/nagios/

-----Message d'origine-----
De : nagios-users-bounces at lists.sourceforge.net
[mailto:nagios-users-bounces at lists.sourceforge.net] De la part de Stanley
Hopcroft
Envoyé : jeudi 7 décembre 2006 23:09
À : Ciro Iriarte
Cc : nagios-users at lists.sourceforge.net
Objet : Re: [Nagios-users] ePN error

Dear Sir,

I am writing to thank you for your letter and say,

On 06/12/06, Ciro Iriarte <cyruspy at gmail.com> wrote:
> Hi, i'm running nagios 2.5 with various perl scripts, just added 
> check_snmp_int.pl (http://www.manubulon.com/nagios/snmp_int.html) to 
> the mix, but i'm getting some ePN error when it gives CRITICAL status 
> (it could be a coincidence)
>
> Output:
> Serial2:DOWN: 1 int NOK : CRITICAL**ePN
> /usr/lib/nagios/plugins/check_snmp_int.pl: "Use of uninitialized value 
> in join or string at /usr/sbin/p1.pl line 72,".
>
> According to the output, it's the TIEHANDLE sub
>
> 70: sub TIEHANDLE {
> 71:        my ($class) = @_;
> 72:        my $me = '';
> 73:        bless \$me, $class;
> 74:}
>
> Is this a problem with ePN (what i think, because of the output) or 
> with the script?

If it is ePN, it certainly isn't in the TIEHANDLE sub (which only runs when
ePN loads - once when Nagios starts).

It's unimpressive that the error is so poorly reported.

The problem is almost certainly with plugin. What I think is happening is
that what the plugin writes (to STDOUT) when it reports a CRITICAL, contains
some undefined values (when the plugin calls print, the tied file handle
results in the p1.pl PRINT sub being called. All PRINT does is concatenate
all the args into a string and append it to the tied object).

(here's a demo

[sh1517 at acisf011 standardise_router_configs]$ cat x #!/usr/bin/perl -w

use strict ;

my @x = (undef, 1, undef, 2) ;

print join(" ", @x), "\n" ;
[sh1517 at acisf011 standardise_router_configs]$ perl x Use of uninitialized
value in join or string at x line 7.
Use of uninitialized value in join or string at x line 7.
 1  2
[sh1517 at acisf011 standardise_router_configs]$
)

If you can simulate or reproduce the event that causes the problem, try to
inspect the values of the variables that the plugin outputs before it exits
with the CRITICAL.
You should see the problem - but it will be reported differently - with or
without ePN.

ePN could and maybe should be modified to not die when print is called with
undef elements. On the other hand, Perl with strict always complains and
since ePN alwats runs with strict, you see the complaints (assuming that is
really the cause of the problem).

HTH,

Yours sincerely.


>
> Thanks in advanced
> Ciro
>

-------------------------------------------------------------------------
Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's
Techsay panel and you'll get the chance to share your opinions on IT &
business topics through brief surveys - and earn cash
http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV
_______________________________________________
Nagios-users mailing list
Nagios-users at lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/nagios-users
::: Please include Nagios version, plugin version (-v) and OS when reporting
any issue. 
::: Messages without supporting info will risk being sent to /dev/null


-------------------------------------------------------------------------
Take Surveys. Earn Cash. Influence the Future of IT
Join SourceForge.net's Techsay panel and you'll get the chance to share your
opinions on IT & business topics through brief surveys - and earn cash
http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV
_______________________________________________
Nagios-users mailing list
Nagios-users at lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/nagios-users
::: Please include Nagios version, plugin version (-v) and OS when reporting any issue. 
::: Messages without supporting info will risk being sent to /dev/null