Question

我为GOS启用了PDO定期Ping：WebSocketBundle，我仍然不时收到此错误：

 09:41:28 ERROR [websocket] Connection error occurred Warning: Error
 while sending QUERY packet. PID=30536 in /home/dev.symfony/libs/composer_vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOStatement.php
 10:00:23 ERROR     [websocket] Connection error occurred
 SQLSTATE[HY000]: General error: 2006 MySQL server has gone away in
 /home/dev.symfony/libs/composer_vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOStatement.php
 line 107 ["connection_id" => 3365,"session_id" =>
 "11667050395acf121709d30728596936"] []

另一点是，如果没有人使用dev服务器，在日志中没有错误，但如果我立即登录到这个错误。

github https://github.com/GeniusesOfSymfony/WebSocketBundle/issues/299也开设了问题但没有答案，所以我也在这里问。谢谢。

Answer 1

解决。问题是我在“onSubscribe”函数中的Topic中定义了周期性计时器，如：

public function onSubscribe(ConnectionInterface $connection, Topic $topic, WampRequest $request)
    {
...
        $topicTimer = $connection->PeriodicTimer;

        //Add periodic timer every 3 seconds update
        $topicTimer->addPeriodicTimer('notifications', 3, function() use ($topic, $connection) {
            $user = $this->clientManipulator->getClient($connection);
            if($user) {
                $counters = $this->globalVariables->getCounters($user);
                $connection->event($topic->getId(),['msg' => $counters]);
            }
        });
...
    }

但现在我改为“独立”定期，如此处所述[{3}} 并将其附加到websocket。现在数据库没有超时。

Answer 2

值得注意的是，当您遵循Symfony文档并创建PdoSessionHandler http://symfony.com/doc/current/doctrine/pdo_session_storage.html时，您将在其中传递dsn而不是pdo服务，它将无法正常工作，因为会话处理程序将创建其他连接。要解决此问题，请像https://github.com/GeniusesOfSymfony/WebSocketBundle/blob/master/Resources/docs/SessionSetup.md

中所述创建一个pdo服务并将其传递给PdoSessionHandler。

Symfony4：Gos Websocket错误：MySQL服务器已经消失

2 个答案: