Segfault updating rrd databases with hot winter RRA

[Pascal Béringuié]

Dear all

I have some problems to update rrd databases with Holt winter RRAs.
I use RRDs perl module and  rrdtool version is 1.2.27. I have the same
problem with older versions of rrdtool.
I joined to this email an example of rrd database that causes the
problem. I also joined the small perl script I use to update it.

./update_base.pl  test.rrd    
updating test.rrd 1213282050:1300
updating test.rrd 1213282080:1300
updating test.rrd 1213282110:1300
updating test.rrd 1213282140:1300
updating test.rrd 1213282170:1300
Segmentation fault

If the problem is known and if you have a solution to avoid it (like
changing holt winter parameters for example: seasonnal period) or better
if a correction exists, thank you to give me the solution.
I would be very happy to use holt winter with my rrd databases.

Best regards.

#!/usr/bin/perl
package WOO::Sophia::RRDmagick;

use lib '/ADMIN/PROG/SNMPG/modules';

use strict;

use Data::Dumper;
use RRDs;
use POSIX;
use File::Basename;
use WOO::Sophia::DEBUG;


my $destination = $ARGV[0];
my $timestamp = 1213282050;
while($timestamp < 1223282080)
{
        print "updating $destination $timestamp:1300\n";
        RRDs::update($destination, "$timestamp:1300");
        #my $ERR=RRDs::error;
        my $ERR="";
        print "$ERR\n" if($ERR);
        $timestamp += 30;
}


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[Tobi Oetiker]

Hi Pascal,

Today Pascal Béringuié wrote:

> Dear all
>
> I have some problems to update rrd databases with Holt winter RRAs.
> I use RRDs perl module and  rrdtool version is 1.2.27. I have the same problem
> with older versions of rrdtool.
> I joined to this email an example of rrd database that causes the problem. I
> also joined the small perl script I use to update it.
>
> ./update_base.pl  test.rrd    updating test.rrd 1213282050:1300
> updating test.rrd 1213282080:1300
> updating test.rrd 1213282110:1300
> updating test.rrd 1213282140:1300
> updating test.rrd 1213282170:1300
> Segmentation fault
>
> If the problem is known and if you have a solution to avoid it (like changing
> holt winter parameters for example: seasonnal period) or better if a
> correction exists, thank you to give me the solution.
> I would be very happy to use holt winter with my rrd databases.

there were massive rewrites concerning the HW functionality in 1.3,
so chances are that the bug is gone there ...

if you can supply a complete test script I will be glad to
investigate

tobi
>
> Best regards.
>

--
Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten
http://it.oetiker.ch tobi@... ++41 62 775 9902
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