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| domain | 5157.cn |
| summary | Here’s a summary of the website content related to a "502 Bad Gateway nginx" error: A 502 Bad Gateway error indicates that a server acting as a gateway or proxy received an invalid response from another server upstream. In the context of "nginx," this specifically means that the Nginx web server, acting as a gateway, couldn't get a valid response from the server it was trying to connect to for a requested resource. Common Causes: * Server Downtime: The upstream server (e.g., the web server hosting the website’s content) is temporarily unavailable. * Network Issues: Problems with network connectivity between Nginx and the upstream server. * Server Overload: The upstream server is overwhelmed with requests and can't respond in a timely manner. * Firewall Issues: A firewall might be blocking the connection. * Nginx Configuration Errors: Incorrect settings within the Nginx configuration could be preventing proper communication. * DNS Problems: Issues with DNS resolution can prevent Nginx from finding the correct upstream server. Troubleshooting Steps (Generally): * Refresh the Page: Often, a temporary issue can be resolved with a simple refresh. * Check the Website's Status: See if the website itself is down using a status checker. * Clear Browser Cache and Cookies: Corrupted cached data can sometimes cause problems. * Check Server Logs: Examine the Nginx error logs and the upstream server's logs for more specific error messages. * Restart Nginx: Restarting the Nginx server can resolve temporary issues. * Verify Network Connectivity: Ensure network connectivity between the servers. In short, the 502 Bad Gateway nginx error signifies a communication failure between servers, requiring investigation into the availability and functionality of both the Nginx gateway and the backend server. |
| title | 502 Bad Gateway |
| description | 502 Bad Gateway |
| keywords | gateway |
| upstreams | |
| downstreams | |
| nslookup | A 127.0.0.1 |
| created | 2025-12-20 |
| updated | 2025-12-23 |
| summarized | 2025-12-24 |
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