Aha! This looks like a similar problem to my own... I'm a relative beginner when it comes to inheritance, so I'm sure that's where my problem lies. Here's what I'm doing: I have a class, "class_X", which is a subclass of DBI, and another class, "class_Y", which is a subclass of class_X. class_X is fairly generic, and merely extends some of the DBI functionality; class_Y is more specific to my database needs. Here's some relevant code: 
package class_X;
require DBI;
@ISA = qw( DBI );
sub new {
     my( $class, $dns, $username, $password ) = @_;
     my %attr = ( PrintError => 1, RaiseError => 0, AutoCommit => 1 );
     my $self = DBI->connect( $dns, $username, $password, \%attr ) or 
+return;
     push @ISA, ref $self if( not grep { $_ eq ref $self } @ISA );
     return bless $self, $class;
}

sub DESTROY {
     my( $self ) = @_;
     $self->disconnect;
}
1;

package class_Y;
require class_X;
@ISA = qw( class_X );

sub new {
     my( $class ) = @_;
     my $dns = "DBI:mysql:database=XXX";
     my $user = "XXX";
     my $pwd = "XXX";
     my $self = class_X->new( $dns, $user, $pwd );
     return bless $self, $class;
}

sub DESTROY {
     my( $self ) = @_;
     $self->disconnect;
}
1;

[download]

This used to work fine (before upgrading DBI); now I'm having the same problem as mentioned in the links you (so graciously) forwarded.

I haven't yet been able to wrap my brain around the problem and figure out exactly how to solve it... Any friendly nudges in the right direction?

In reply to Re: Re: DBI-disconnect ??? by christopherbarsuk
in thread DBI-disconnect ??? by christopherbarsuk

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.