TODO with embedded Perl support.
Stanley Hopcroft
Stanley.Hopcroft at IPAustralia.Gov.AU
Mon Jan 17 02:52:48 CET 2005
Dear Folks,
I am writing to enumerate the known problems with embedded Perl support
in Nagios.
Since moving from Perl 5.005 I have become aware of these issues. I
don't think they have much, if anything, to do with Nagios.
It seems that the embedded Perl support with a threaded Perl suffers
from
1 heavy leak rate 600 kB - 1 MB/hour
This is way above what I was happy to tolerate with a non threaded Perl.
2 Problems with p1.pl
Perl will SEGV (taking an embedded Perl Nag) with it if the p1.pl
debugging hooks are used ie
setting DEBUG or GARRULOUS in the p1.pl text and an accompanying log
file does not track the plugin execution (as it did with older Perls)
but causes a SEGV in Perl.
p1.pl with the default log level (ie no plugin trace) works Ok subject
to the leak above
(FWIW, the SEGV comes from Perl whether called from C or from Perl; it
is not the C code in checks.c that is causing this; the fault is in
p1.pl or in libperl in the Perl port on this system. It seems strange
that a Perl program can cause Perl to SEGV)
I am investigating both matters.
These things have only been checked on FreeBSD 4-10-RELEASE/Perl 5.8.5
built with threads.
(if people want to contribute to this latter problem [SEGV], there is no
need to have a working Nagios to do so. The problems can be duplicated
from Perl. There is a tarball of code to play around with it).
Yours sincerely.
--
Stanley Hopcroft
IP Australia
Ph: (02) 6283 3189 Fax: (02) 6281 1353
PO Box 200 Woden ACT 2606
http://www.ipaustralia.gov.au
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