amazon-web-services - 升级在 AWS 上运行的 YII2 项目后偶尔出现 503 错误

Question

我有一个在 AWS 上运行的 YII2 项目（elastic beanstalk (php 7.1) + 2 EC2 intances，一个应用程序负载均衡器（安装了 AWS WAF）+ RDS），很长时间没有更新，但运行良好。因为我想升级到更新的 PHP 版本，所以我还必须升级我的 YII2 项目。我运行了 composer（见下面的输出），在对代码进行了一些更改之后，一切都在我的本地机器上再次运行了。

我将项目上传回 AWS，并且“偶尔”收到 503 错误。错误会在不同的地方弹出，例如在我更新数据库中的某些内容并且页面被重定向时在下面截断的代码中。但碰巧相同的代码运行了 10 或 20 次完美，而下一次我收到错误。数据库中的更新每次都会成功，但有时我会在页面重定向时收到 503。

我真的对这个一无所知。有人知道问题可能是什么吗？（php仍然是7.1）

非常感谢！

缺口

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public function actionUpdate($id)
{
    URLCheck::checkBeschikbaarBudgetID($id);

    $model = $this->findModel($id);

    if ($model->load(Yii::$app->request->post()) && $model->save()) {
        return $this->redirect(['index', 'id'=>$model->id]);

    } else {
        return $this->render('update', [
                'model' => $model,
        ]);
    }
}

标签： amazon-web-servicesyii2