Worker发送信息到客户端后连接会断开

use Workerman\Worker;
use Workerman\Autoloader;

// autoload
require_once __DIR__ . '/../../Workerman/Autoloader.php';

$worker = new Worker("tcp://0.0.0.0:3737");
$worker->name = 'gbapp';
$worker->onMessage = function($connection, $data)
{
    foreach($connection->worker->connections as $con)
    {
        $con->send($data);
    }
};
Worker::runAll();