The reasons for 502 bad errors can be numerous, from minor browser-related issues to problems with CDNs. This article will go over some troubleshooting steps to follow when a 502 Bad Gateway error occurs, both for the server and client-side. We will also take a look at the different factors that might cause this error message, along with the impact they can have on your site’s SEO.
| Error code | 502 Bad Gateway Error |
| Error type | Server-side error |
| Error variations | Temporary Error (502) HTTP Error 502 Bad Gateway 502 Proxy Error Bad 502 Gateway 502 Service Temporarily Overloaded A blank white screen |
| Error causes | Unresolved domain name Server overload Browser issues Home-network equipment error Firewall blocks |
- 502 Bad Gateway Error – Video Tutorial
- What Is a 502 Bad Gateway Error?
- What Causes a 502 Bad Gateway Error?
- How to Fix 502 Bad Gateway Error
- 502 Bad Gateway Error Variations
- How 502 Bad Gateway Error Affects SEO
- Error Status Codes Similar to 502 Bad Gateway
- 502 Bad Gateway FAQ
502 Bad Gateway Error – Video Tutorial
Looking for an easy visual guide? Check the video below.
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What Is a 502 Bad Gateway Error?
The 502 Bad Gateway error indicates that the server which you’re connecting to received an invalid response. When accessing a URL, your browser sends an HTTP request to the server, which in this case was invalid, returning an HTTP 502 status code.
Browsers and servers interact with each other using HTTP (HyperText Transfer Protocol) status codes. Whenever you access a URL, the browser sends an HTTP request to the webserver of the site you’re accessing. The server then returns a status code along with the resources you requested.
HTTP status codes are grouped into five server responses:
- 1xx – informational
- 2xx – success
- 3xx – redirection
- 4xx – client error
- 5xx – server error
An HTTP status code starting with the digit “5” relates to errors that occur when there’s a network error or communication problem between web servers.
Other 5xx status codes include the 500 Internal Server Error, 501 Not Implemented, 503 Service Unavailable, and 504 Gateway Timeout. Though the exact reasons for each error vary, in most cases, the cause lies within the server.
What Causes a 502 Bad Gateway Error?
Before you can fix the Gateway error, you need to examine the potential factors causing this error, such as:
- Unresolved domain name. This happens when a domain name is not resolving to the correct IP. Keep in mind that if you have recently migrated your domain name to another host, DNS servers changes might take up to 24 hours to be fully propagated and active.
- Origin server overload. Whenever an origin server runs out of resources, it can get overloaded and crash, triggering an http error 502. A sudden spike of traffic, low memory, and software timeouts are some of the common reasons for server overload.
- Browser errors. Sometimes, a browser might show a 502 coding error despite not having server or network issues. In this case, the error might be triggered by faulty browser extensions such as ad-blockers, outdated browser versions, or corrupted files in your browser cache.
- Home-network equipment issues. If you encounter HTTP 502 Errors in more than one website or browser, there is a good chance that your network equipment might be having a temporary connection problem.
- Firewall blocks. A firewall protects your website from any suspicious traffic. However, some firewall systems are over-sensitive and might detect false positives. The system might be blocking a specific ISP or a request from a CDN.
How to Fix 502 Bad Gateway Error
Although the 502 Bad Gateway error usually relates to server-side problems, it can also be caused by misconfigurations or temporary issues from the client-side. Hence, we’ll overview the common troubleshooting steps with both causes in mind.
While some solutions are focused on WordPress, most of them can be applied to any website.
To read the rest of the story: How to Fix 502 Bad Gateway Error
Conclusion
Hope this post was helpful to you and that you have a very successful impression with your business partners, friends, and family! Check out the other sections of my blog for more tips on ReferringBusinessGroup.
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