[CDBI] Bizarre problem,semi-reproducable

[prev] [thread] [next] [Date index for 2006/01/18]

Hello all,
	I'm not sure the best way to describe this issue, but I'll do what I =
can.  I don't know if this is a problem with Class-DBI, or Catalyst, or =
something else, but I'm wondering if anybody has seen anything =
resembling this at all.

The very short summary: I'm retrieving some values from a Class::DBI =
object (via a couple lookup tables as well), and pushing it in a string =
with some static text into two different arrays.  This process is then =
repeated n number of times.  On a later iteration, during one of the =
lookup instructions, the text in one of the already populated arrays is =
changed.  (A couple characters are missing, specifically).  Its more or =
less the same characters every time.  (About 3 different places I've =
seen it, but its pretty consistant)  It does not happen every time this =
is run, maybe 1 in 4 times.  There are no errors, just missing text.  =
Its not a thread issue or anything like that, as I've tried it with =
apache in single-thread mode and nothing else accessing the DB and it =
still shows this issue.

Below is a debug log of what's happening:

[Tue Jan 17 17:58:01 2006] [catalyst] [debug] Pre-dbi defs:
DEF:ifOutDiscards=3D/srv/torrus/collector_snr/2/2/15.2.2.fakedomain.com_F=
a9_17_if-mib.rrd:ifOutDiscards:AVERAGE
[Tue Jan 17 17:58:01 2006] [catalyst] [debug] Post-dbi defs:
DEF:ifOutDiscards=3D/srv/torrus/collector_snr/2/2/15.2.2.fakedomain.com_F=
a9_17_if-mib.rrd:ifOutDiscards:AVERAGE
[Tue Jan 17 17:58:01 2006] [catalyst] [debug] Post-path defs:
DEF:ifOutDiscards=3D/srv/torrus/collector_snr/2/2.2.fakedomain.com_Fa9_17=
_if-mib.rrd:ifOutDiscards:AVERAGE
[Tue Jan 17 17:58:01 2006] [catalyst] [debug] Pre-push defs:
DEF:ifOutDiscards=3D/srv/torrus/collector_snr/2/2.2.fakedomain.com_Fa9_17=
_if-mib.rrd:ifOutDiscards:AVERAGE

This is the second iteration through the loop.  The data being called =
"defs" here is from the first iteration.  You can see in what I'm =
calling the post-path line, the characters "2/15" were pulled from the =
string.

Below is the code that's causing this, with debug messages.

   my @vnames;
    my @lines;

    foreach my $graph (@graphs)
    {
        # Spin through the graphs and put together the last few =
arguments for the RRDs::graph function

        $c->log->debug("Pre-dbi defs:\n@vnames");

        my $rra =3D NetResponse::Model::CDBI::Rras->retrieve( $graph ) =
|| die "Unable to retrieve rra";
        $c->log->debug("Post-dbi defs:\n@vnames");
        my $rrd_path =3D $rra->rrd_path_id->rrd_path;
        $c->log->debug("Post-path defs:\n@vnames");
        my $rra_cf =3D $rra->cf;
        my $rra_name =3D $rra->rra_name_id->name;

        $c->log->debug("Pre-push defs:\n@vnames");
        push(@vnames,"DEF:$rra_name=3D$rrd_path:$rra_name:$rra_cf");
        push(@lines,"LINE1:$rra_name\#00FF00:$rra_name\\c");
        $c->log->debug("DEF:$rra_name=3D$rrd_path:$rra_name:$rra_cf");
        $c->log->debug("defs:\n@vnames");
    }



You can see from the debugging that the change to the array is happening =
during the line "my $rrd_path =3D $rra->rrd_path_id->rrd_path;"
$rra is an instance of NetResponse::Model::CDBI::Rras, which has a base =
class of NetResponse::Model::CDBI, which has a base class of =
Catalyst::Model::CDBI and uses Catalyst::Model::CDBI::Sweet.

Has anybody seen anything like this before, or have even the slightest =
idea what might be going on?  I have tried to troubleshoot this in every =
way I know how, but I am at a total loss, since during the line where =
the array is changed, the array should not even be being accessed.

Thanks,
Dylan

_______________________________________________
ClassDBI mailing list
ClassDBI@xxxxx.xxxxxxxxxxxxxxxx.xxx
http://lists.digitalcraftsmen.net/mailman/listinfo/classdbi