Wordpress 迁移问题 503 错误

Posted 2023-02-24

【中文标题】Wordpress 迁移问题 503 错误

【英文标题】：Wordpress Migration Issue 503 error

【发布时间】：2018-12-13 14:21:36

【问题描述】：

最近我修改了一个在开发服务器上创建的网站。然后，我开始将它迁移到主服务器上。最初，在实时服务器上上传数据库时出现 unicode 错误。我用谷歌搜索并找到了堆栈溢出本身的解决方案（#1273 – Unknown collation: ‘utf8mb4_unicode_520_ci’）。我使用了 sabba 建议的方法，它奏效了。后来当我更改配置文件并加载该链接时。它给了我一个503错误..它的错误如下：

服务不可用

由于维护停机或容量问题，服务器暂时无法满足您的请求。请稍后再试。

此外，在尝试使用错误文档处理请求时遇到 503 Service Unavailable 错误

【问题讨论】：

检查主文件夹中的 error_log。

【参考方案1】：

完成这些步骤并检查它，

启用 WP_DEBUG

But since the 503 error often locks you out of your WordPress admin, we shall use WP_DEBUG and WP_DEBUG_LOG, WP_DEBUG_DISPLAY and @ini_set constants available to WordPress.

To enable debug mode in WordPress and write errors to a log file,  follow these steps:    

 1. Open the wp-config.php file
 2. Scroll down to where WP_DEBUG is defined. It looks like this define ('WP_DEBUG', false);. If it is missing, we will add it just above the line that says /*That's all, stop editing! Happy blogging.*/

 3. Insert the DEBUG magic codes. Just change the above define ('WP_DEBUG', false); code to:
    define ('WP_DEBUG', true);
    define ('WP_DEBUG_LOG', true);
    define ('WP_DEBUG_DISPLAY', false);
    @ini_set ('display_errors', 0);

 4. Save changes

Now, reload your site to provoke the error. Next, locate a file known as debug.log inside your wp-content folder in your WordPress directory.

This file contains all the errors on your website. If your 503 service unavailable error is caused by a custom code snippet, it will show up somewhere with details of the error.

Eliminate/replace the problematic code and reload your site. If the 503 error persists, the problem could lie in your web server.