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What is the 502 bad gateway? How to find the reason and how to fix it

502 bad gateway is the common error that Internet users can find when accessing an error website. However, most of us know that is an error from the website and the browser cannot load the site content, but as the website owner, we may not know what this error in fact is.

This post will explain to you what is 502 bad gateway and possible reasons causing this error, with many solutions that you can fix or at least, prevent it from your website.

What is the 502 bad gateway error?

502 bad gateway is the error of HTTP state when the server machine receives the incorrect response from another server machine. When you get this error, your website visitors cannot connect to your website in a normal way. In order to fix it, we need to know the error’s signals and reasons causing it.

Signals of the error 502 bad gateway

The way that the error 502 bad gateway appears depending on the server machine, the browser or the machine’s operating system that end users use. These following signals appear when there is an error 502 bad gateway. If your website has these following signals, you should try to fix it.

  • Error 502
  • 502 bad Gateway
  • 502 Service Temporarily Overloaded
  • 502 bad gateway cloudflare
  • Request failed with status code 502
  • 502 Proxy Error
  • 502 bad gateway nginx
  • Temporary Error (502)
  • 502 Server Error: The server encountered a temporary error and could not complete your request.
  • HTTP 502
  • Bad Gateway: The proxy server received an invalid response from an upstream server.
  • 502. That’s an error
  • HTTP Error 502 – Bad Gateway

Reasons causing the error 502 bad gateway

First, you need to understand that gateway is the machine between the server where hosted your website and the machine your end users use to visit your website. Gateway is responsible for connecting, distributing data and direct data packages. When users connecting to a website from computers, there are many machines working at the same time to server your request. The error 502 bad gateway appearing when there is an error connecting between your computer (your browser) and your server machine.

How to fix the error 502 bad gateway

In fact, there are quite a few methods for you to fix the 502 bad gateway error. However, it doesn’t guarantee which method would surely fix the issue. You will need to try one by one. These following ways are the most frequent ways of usage:

Restart your computer

This is the original and simplest way but sometimes it solves a lot of problems. The error 502 bad gateway could happen when there is an error in the Internet connection between your computer and the Internet, restarting your computer could probably solve this issue.

Restart your browser

Besides restarting your computer, you can choose to restart your browser. If the error 502 bad gateway happens in the time when the browser failed to connect to the server host where hosting your website, then restarting the browser could solve this issue.

Copy and paste again the URL

Another possible error is that the server hosting your website can be temporarily inaccessible, and hence your browser cannot connect to the internet. In this situation, you can press F5 or click “Refresh” to load again the URL.

Delete the browser’s cache

If your browser stores the wrong file (example Javascript or HTML, CSS), it can cause the error 502 bad gateway. You should try to clear your browser’s cache and re-open your website.

Ignore the firewall or CDN

CDN is the network distributing the content. This network and the firewall of your computer can cause the error 502 bad gateway. Ignore the CND or the firewall of your computer can solve the problem.

De-activate plugins

Plugins are the most important features of WordPress website. However, if you install wrong plugins (especially those are free and have bad or no reputation at all), it can cause 502 bad gateway on your website. The best way is to destroy or uninstall all plugins to try your website again, and then install one by one to find which plugin is the one causing the problem. (You can always activate and deactivate plugins)

Use other browsers

It is possible that your browser has a problem and it causes the error 502 bad gateway. Hence, use another browsers such as Chrome, FireFox, Safari, IE… If you move to other browsers and the issue is still there, it will be clearer that the error is not caused by the browser end users are using.

Checking your Internet adapter

There could happen some errors related to your home’s Internet modem, router, switcher… Restart those hardwares.

Change your website’s DNS

DNS can cause those errors. You can ask your website’s admin master to change the DNS on servers, routers, or the hosting machine that hosts your website.

Restart your browser at the Safe Mode

The error 502 bad gateway can happen when we install the extension for the browser. In this case, you can restart your browser in the safe mode. The safe mode could make your browser running only the isolated state without additional extensions that you install on the browser. If it makes you access your website, then it can be extensions you install on your browser causing those problems.

Directly connect to the hosting server or the web master of the website

If you try all ways and you cannot fix the error 502 bad gateway, the reason could be the website itself. Connecting to the website’s owner or the website master to fix the error.

With our above information, we hope that you can solve the error 502 bad gateway easier. If you apply all the above ways and you cannot fix, you can connect with us or leave us some feedbacks under this post.

Vanntechs Website Studio in Montreal Quebec Canada with more than 7 years of website designing and website development, we always serve our client’s demands. We provide website design services with affordable pricing, complying with SEO standards, optimize the website’s speed, improve the user-friendly design of the site and make sure you can control and manage your website in the easiest way.

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