Saturday, January 28, 2023

Why are websites getting 5xx server errors?

In simple words, 5xx server errors mean the problem was caused by the server. With a 5xx code, the request can be presented with no changes

HTTP (Hypertext Transfer Protocol) is the foundation of the World Wide Web. Built-in the early 1990s, HTTP enables a Uniform Resource Locator (URL) to be associated with any document on the web. URLs are composed of a protocol identifier and a hostname or port number.

The protocol identifier identifies HTTP while the hostname or port number identifies the server on which the document is located.

The first digit can range from 1xx to 5xx, and it defines the class of response.

Informational response (100-199)

Success (200-299)

Redirects (300-399)

Client errors (400-499)

Server errors (500-599)

Here, we will focus on the 5xx HTTP responses.

You will learn what this code means, the most common causes, and how to detect it and fix it.

Why did my website return a 5xx server errors? When does it occur?

Below is a list of the 5xx codes with a brief explanation of their meaning.

solve 5xx server errors

500 – Internal server error

It is a generic error message that means something went wrong on the Website’s server, but the server can’t be specific about the exact problem.

501 – Not Implemented

The server running the site does not understand or does not support the HTTP method sent by the client. This code usually implies future availability.

502 – Bad Gateway

The code indicates that the server acting as a gateway or proxy received an invalid response from an upstream server.

503 – Service Unavailable

The server cannot handle the request due to a temporary overloading or maintenance of the server. When this code appears, Google understands that you have a temporary issue and does not penalize your site or deindex your page.

504 – Gateway timeout

The server does not receive a timely response from another server acting as a gateway or proxy and cannot complete the client’s request within the given time frame.

505 – HTTP Version Not Supported

This error appears when the server does not support the version of the HTTP protocol used in the browser request.

506 – Variant Also Negotiates

The code indicates an internal server configuration error. The server has detected a circular reference when processing the negotiation part of the requested content.

507 – Insufficient Storage

This status code is returned when the server cannot create or modify the requested resource because there is not enough free storage space. Just like the 503 server error, this is also a temporary condition.

508 – Loop Detected

This error appears when the server tries to process the request and finds an infinite loop. This code shows that the entire operation has failed.

510 – Not Extended

The browser does not have the necessary extension to understand the request.

511 – Network Authentication Required

This error appears when the client (browser) needs to authenticate to gain network access. The response representation should contain a link to a resource that lets users send their credentials.

How to detect 5xx error codes?

If you’re experiencing an error code on your computer, there are a few things you can do to try and determine what the code means. First, check the error message for any clues. If there’s no helpful information included in the message, look for other symptoms that may point to the problem.

5xx server error

Once you’ve determined the root cause of the issue, there are a few different ways to fix it.

Leaving aside the possibility that you can go page by page to find a 500 error (extremely time-consuming), the best option is to use an SEO Crawler that quickly points out these pages.

How to fix 5xx server error

Once you’ve detected any 500s errors with an SEO Crawler, it’s time to fix it.

Before you get down to business, first thing, reload the page that has returned a 5xx error in your browser to see if it persists. Sometimes, this simple action will save you a lot of time.

Google considers that temporary errors such as 503 can be fixed within a short time so it does not penalize or deindex the pages that return this code. Make sure your web server is active and check if you need to add more space.

Check the error logs for your server. By performing log file analysis, you can get extra information about your error status codes.

Make sure your server is not overloaded or misconfigured. In that case, you’ll need to check it with your developers or contact your hosting provider.

Review the changes you’ve made recently to see if any of them might be the cause. Sometimes, plugin issues such as faulty installation or incompatibilities may lead to errors. Deactivate the plugins and check if the error disappears.

In that case, activate the plugins one by one to detect which one is causing the issue.


Saqib Raheel Butt
Saqib Raheel Butt
We are a team of SEO experts who love to help people learn about technical SEO. I write about it all the time because I believe in the power of education and skill. We also love to train and motivate people to teach the skill. It's our passion!

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