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502 Bad Gateway.

Screenshot of a computer screen displaying a 502 Bad Gateway error in a web browser tab, with the website's URL visible and the error message prominently shown against a dark background.
Real-life example of a 502 Bad Gateway error encountered when attempting to access a website.

  1. For Website Owners:

  2. For Visitors:

1. 502 Bad Gateway. What does it mean?

It means an Invalid response from the Other server to the website's main server.

See this infographic image for how it typically happens:

Visual representation of a 502 Bad Gateway error sequence: Begins with a user accessing a site via a mobile web browser, followed by the request moving through the internet to the main server. The main server fails to process the request, resulting in an invalid response from another server. Because of the communication problem between the main server and the other server, the main server returned an HTTP status code 502 bad gateway error message to the mobile browser. The process concludes with a 502 Bad Gateway error message, indicating the communication failure.
Breaking Down a 502 Bad Gateway Error: From User Request to Server Communication Failure.

A "502 Bad Gateway" error is an HTTP status code indicating that one server on the internet received an invalid response from another server. It's a common error message that indicates a problem with the communication between two servers involved in loading a web page or fulfilling another request by a browser.

2. How can I fix the 502 Bad Gateway error?

1. For Website Owners:

2. For Visitors:

1. For Website Owners:

  1. Contacting the website Hosting Provider: If you're experiencing frequent 502 errors, your first step should be to contact your hosting provider. They can offer insights or solutions since the problem might be on their end.

  2. Checking server health: Ensure your website server is running correctly; this includes reviewing server resources like CPU, memory usage, and disk space to ensure they are not overloaded or running out of capacity. High traffic can often cause server resources to become overwhelmed, leading to 502 Bad gateway errors.

  3. Review Server Logs: Server logs are your go-to for understanding the cause of 502 errors. They can show you when the error happened and what might have caused it, helping you pinpoint the exact issue.

  4. Configuration Issues: Misconfigurations in your server or proxy settings can lead to 502 errors. Ensure your proxy settings are correct, especially if you're using a reverse proxy.

  5. Network Issues: Check if there are any DNS changes or network connectivity issues between your server and the rest of the internet.

2. For Visitors.

  1. Refresh the Page.

  2. Check Your Internet Connection.

  3. Clear Browser Cache and Cookies.

  4. Try a Different Browser.

  5. Use a VPN.

  6. Check on Another Device.

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