warn: Error creating a DNS resolver socket: No such file or directory at /opt/lib/perl5/site_perl/5.8.8/Mail/SpamAssassin/DnsResolver.pm line 203

##</code><code>##

  my $port_offset = int(rand(64511));  # 65535 - 1024
  for (my $i = 0; $i<64511; $i++) {
    my $lport = 1024 + (($port_offset + $i) % 64511);

    my %args = (
        PeerAddr => $ns,
        PeerPort => $self->{res}->{port},
        Proto => 'udp',
        LocalPort => $lport,
        Type => SOCK_DGRAM,
        Domain => $family,
    );

    if (HAS_SOCKET_INET6) {
      $sock = IO::Socket::INET6->new(%args);
    } else {
      $sock = IO::Socket::INET->new(%args);
    }
    $errno = $!;
    if (defined $sock) {  # ok, got it
      last;
    } elsif ($! == EADDRINUSE) {  # in use, let's try another source port
      dbg("dns: UDP port $lport already in use, trying another port");
    } else {
      # did we fail due to the attempted use of an IPv6 nameserver?
      $self->_ipv6_ns_warning()  if (!$ipv6 && $errno==EINVAL);
      warn "Error creating a DNS resolver socket: $errno";
      goto no_sock;
    }
  }
  if (!defined $sock) {
    warn "Can't create a DNS resolver socket: $errno";
    goto no_sock;
  }

##</code><code>##

;; RESOLVER state:
;;  domain       =
;;  searchlist   =
;;  nameservers  = <DNS IP's protected)
;;  port         = 53
;;  srcport      = 0
;;  srcaddr      = 0.0.0.0
;;  tcp_timeout  = 120
;;  retrans  = 5  retry    = 4
;;  usevc    = 0  stayopen = 0    igntc = 0
;;  defnames = 1  dnsrch   = 1
;;  recurse  = 1  debug    = 0