Definition: A 502 Error, also known as "502 Bad Gateway," is an HTTP status code that indicates a server acting as a gateway or proxy received an invalid response from an inbound server. This error typically occurs when there is a disruption in communication between servers, causing the request to fail.
Causes: Common causes of a 502 Error include server overload, misconfigured server settings, DNS issues, network problems, or a temporary glitch in server communication. It can also occur if the upstream server is down or undergoing maintenance.
Resolution: To resolve a 502 Error, one can try refreshing the page, clearing browser cache, or checking the server's status. Website administrators should examine server logs, verify server configurations, and ensure that all servers in the chain are operational. If the issue persists, further investigation into server-side scripts and firewall settings may be necessary.
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