use threads;
use Log::log4perl qw(get_logger);
use File::Tail;

use My::Object;

my $tail = File::Tail->new('file.log');
while( defined( my $line = $tail->read ) )
{
   next if $line =~ m/^#|^\s*$/;

   my $obj = My::Object->new($line);
   my $th = threads->create( foo, $obj );
   my $rc = $th->join;
   $logger->warn("Problem") if $rc;
   next;
}

sub foo { (shift)->bar; }

__END__

# taking the next; in the while doesn't work, either...