总是丢失第一条消息

我一直在尝试用zeromq在本地计算机和远程服务器之间建立一个简单的"管道"。我在本地计算机上测试了这个脚本，它运行得很好，但当我试图使用远程计算机（带有SOCKET_PULL的计算机）作为结束时，我开始出现问题。任何进程发送的第一条消息总是丢失。

代码很简单，

推送（sender.php）：

<?php
//Use the specified port or 5555 for sending jobs
$port = $_SERVER['argc'] > 1 ? $_SERVER['argv'][1] : '5555';
$jobN = $_SERVER['argc'] > 2 ? $_SERVER['argv'][2] : '';

$context = new ZMQContext();
//  Socket to send messages on
$sender = new ZMQSocket($context, ZMQ::SOCKET_PUSH);
//If I want to connect to the server I use this line
$sender->connect("tcp://my-server-address.com:$port");
//If I want to connect to localhost I use this line
//$sender->connect("tcp://localhost:$port");
$sender->send('job-1' . ($jobN ? " $jobN" : ''));
$sender->send('job-2' . ($jobN ? " $jobN" : ''));
$sender->send('job-3' . ($jobN ? " $jobN" : ''));
$sender->send('job-4' . ($jobN ? " $jobN" : ''));
$sender->send('job-5' . ($jobN ? " $jobN" : ''));
$sender->send('job-6' . ($jobN ? " $jobN" : ''));
$sender->send('job-7' . ($jobN ? " $jobN" : ''));
$sender->send('job-8' . ($jobN ? " $jobN" : ''));
$sender->send('job-9' . ($jobN ? " $jobN" : ''));
$sender->send('job-10' . ($jobN ? " $jobN" : ''));
echo 'done';

接收器（worker.php）

<?php
//Use the specified port or 5556 for getting finished jobs
$port = $_SERVER['argc'] > 1 ? $_SERVER['argv'][1] : '5555';
//  Prepare our context and socket
$context = new ZMQContext();
$receiver = new ZMQSocket($context, ZMQ::SOCKET_PULL);
$receiver->bind("tcp://*:$port");
$count = 1;
while(true) {
    $string = $receiver->recv();
    echo "Received $string $count'n";
    $count += 1;
}

如果我在本地运行代码（一个终端中为"phpworker.php"，另一个终端为"phpsender.php"）。

我得到

Received job-1 1
Received job-2 2
Received job-3 3
Received job-4 4
Received job-5 5
Received job-6 6
Received job-7 7
Received job-8 8
Received job-9 9
Received job-10 10

但如果我使用远程（本地的发送器和远程的接收器），我会得到

Received job-2 1
Received job-3 2
Received job-4 3
Received job-5 4
Received job-6 5
Received job-7 6
Received job-8 7
Received job-9 8
Received job-10 9

我做错什么了吗？？

注意：我不能锁定发送方（SOCKET_REQ会锁定等待回复的执行）。无论如何，0mq应该在没有锁的情况下工作。注意：我的本地计算机是一台mac计算机，服务器是一个带有ubuntu的amazon实例（我认为这不会影响，但我正在写它，以防万一）。

编辑：只是澄清一下，我不想通过互联网发送数据，我只是想在遇到这个问题时测试具有高延迟的zeromq。