{"id":11974,"date":"2022-05-18T07:28:57","date_gmt":"2022-05-18T07:28:57","guid":{"rendered":"https:\/\/www.dopinger.com\/blog\/?p=11974"},"modified":"2024-07-24T11:44:01","modified_gmt":"2024-07-24T11:44:01","slug":"what-is-502-bad-gateway","status":"publish","type":"post","link":"https:\/\/www.dopinger.com\/blog\/what-is-502-bad-gateway","title":{"rendered":"What 502 Bad Gateway Means and How to Fix It"},"content":{"rendered":"\n

A 502 Bad Gateway error is a pretty common, yet annoying issue for most web users. It’s one of the HTTP status codes<\/a> that point out the presence of a communication breakdown with a given server. Are you frequently encountering this kind of response and wonder how to deal with it? Then our article might be of help. We will first define in more detail the 502 error code. This is necessary in order to understand the core of the problem. In the second part of our article, we will have to identify the different factors that may generate such glitches. We will also expose the consequences that they may have on your site, especially regarding your SEO practice. And of course, most importantly, we will see how to solve them.<\/p>\n\n\n\n

<\/span>What Is a 502 Bad Gateway?<\/span><\/h2>\n\n\n\n

Perhaps the easiest part here is that the name already gives some clues, right? At least it indicates that something went wrong and needs to be remediated. First of all, let’s revisit the general context of a 502 Bad Gateway. You probably know that servers communicate with one another through Hypertext Transfer Protocol (HTTP) response status codes. When you type an URL, your browser sends a request to the server of the site you are trying to reach. That server responds to your request with a certain status code along with the content you are looking for. Or not… There are indeed 5 different types of codes. Each category begins with a distinct digit that represents the nature of the response:<\/p>\n\n\n\n

1** informational response<\/strong> means that the response was received and is being processed.<\/p>\n\n\n\n

2** successful<\/strong> means that the request was received, processed, and accepted.<\/p>\n\n\n\n

3** redirection<\/strong> indicates that the request needs additional action to be fulfilled.<\/p>\n\n\n\n

4** client error<\/strong> may be pointing out some bad syntax or unachievable request.<\/p>\n\n\n\n

5** server error<\/strong> means that even though the request was plausibly valid, the server can’t fulfill it. <\/p>\n\n\n\n

As you see, the 502 status code belongs to the fifth and last category. This is where you also find the other 5** error types. Think of 501 Not Implemented, 503 Service Unavailable, 504 Gateway Timeout, 505 HTTP Version Not Supported, 506 Variant Also Negotiates, etc. They are all server-related (versus client-related). You are connected to a specific server that acts as a proxy and transmits information properly. Unfortunately, your recipient (that is, your target server) is not able to send you a valid response.  <\/p>\n\n\n

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<\/span>Being Aware of Equivalents<\/span><\/h2>\n\n\n\n

It’s good to keep in mind that 502 Bad Gateway errors can appear on your screen in slightly different forms. Among the possible variations, we have:<\/p>\n\n\n\n