Ah, now I see the problem. I couldn't create exact test conditions, so simplified script a bit. There were two problems: first, you forgot to set SO_REUSEADDR, second, AnyEvent::HTTP under the hood tried to create second connection to the server with the same source/destination ports, this of course couldn't work (thanks to strace for the help), I fixed it by setting persistent to 1. So here's the script that worked for me, hope it will help: 

#!/usr/bin/perl
use strict;
use warnings;

use AnyEvent;
use AnyEvent::HTTP;
use AnyEvent::Socket    qw( tcp_connect );
use Socket;

my @hosts = qw(host1 host2);
my @ports = qw(80);

my $cv = AnyEvent->condvar;

foreach my $port (@ports) {
    foreach my $host (@hosts) {
        print "[*] $host:$port\n";
        $cv->begin;
        check_http(1111, $host);
    }
}

$cv->recv;

sub check_http {
    my ($port_number, $host) = @_;
    my $ret_val;
    $host = 'http://' . $host;

    http_get $host,
        persistent => 1,
        on_prepare => sub {
            my ($fh) = @_;

            setsockopt($fh, SOL_SOCKET, SO_REUSEADDR, 1) or warn "Coul
+dn't set SO_REUSEADDR";
            bind($fh, sockaddr_in($port_number, INADDR_ANY))
                or print "bind: $!\n";

            15
        },
        sub {
            my ($body, $hdr) = @_;

            if ($hdr->{Status} =~ /^2/) {
                print "Seems OK! (:\n";
            } else {
                print "ERROR, $hdr->{Status} $hdr->{Reason}\n";
            }

            print "[X] $host:$port_number\n";
            $cv->end;
        };
}

[download]

In reply to Re^5: Asynchronous HTTP Request using specific ports by zwon
in thread Asynchronous HTTP Request using specific ports by Adamba

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.