The 502 Bad Gateway error is a common HTTP status code indicating that a server received an invalid response from an upstream server while acting as a gateway or proxy. This error is commonly found in load balancer, proxy server or reverse proxy setups and affects website accessibility and user...

1. What is a 502 Bad Gateway Error 502 Bad Gateway is an HTTP status code that indicates that a server, acting as a gateway or proxy, attempted to access the next server, but that server returned an illegal response. Simply put, 502 is an error type code that...

When using a browser to access a website built on WordPress, you may sometimes encounter the error "Error establishing a database connection" or "Error establishing a database connection". or "Error establishing a database connection". In this article, we will introduce the causes and solutions to help you...

SiteGround is a cloud server provider that is highly favored by users and has won wide acclaim for its quality service and stable performance. If you are not satisfied with the service during the process, SiteGround offers a 30-day no-excuses refund policy, which is a great convenience for users....

What is PHP high concurrency? The problem of high concurrency is often encountered in the development and deployment of applications, when with the traffic becomes larger, a variety of technical problems will be encountered, such as interface response timeout, elevated CPU load, frequent GC, deadlocks, large data volume storage and so on. For example: Taobao's double...

"Database connection error" is one of the common problems in the operation of websites and applications, especially when managing multiple databases. Many webmasters don't know where to start to troubleshoot the problem of "Error establishing database connection". However, log files are the solution to this...

When managing a WordPress website, it's relatively common to encounter a white screen, a feature failure, or a page loading problem. At this point, WordPress debugging is very important. WordPress has a built-in debugging tool that enables debugging logs to catch errors and help me...

In the digital age, servers are the heart of business operations. They host websites, applications, data processing, and other critical tasks. However, when the amount of access exceeds the server's carrying capacity, it can lead to performance degradation or even server crashes. Server crashes not only affect user experience, but also...

If you've ever uploaded a theme or plugin to WordPress and encountered the "The link you follow has expired" error, this article is for you. This article will delve into the causes of this error and how to fix it to ensure that you can upload your files without this problem...

In today's Internet age, servers face traffic spikes that pose unprecedented challenges. Especially for websites that run business-critical operations, traffic spikes can lead to service interruptions and significant losses to the organization. Therefore, developing a comprehensive strategy to cope with and prevent server...