An Http Error Occurred Status Code = 502
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This server received an invalid response from an upstream server it accessed to fulfil the request. This usually does not mean that the upstream server is down (no status code 502 returned response to the gateway/proxy), but rather that the upstream server and the gateway/proxy
Proxy 502 Error
do not agree on the protocol for exchanging data. Given that Internet protocols are quite clear, it often means that one bad gateway error 502 or both machines have been incorrectly or incompletely programmed. Fixing 502 errors - general This problem is due to poor IP communication between back-end computers, possibly including the Web server at the site you are 502 bad gateway nginx trying to visit. Before analysing this problem, you should clear your browser cache completely. If you are surfing the Web and see this problem for all Web sites you try to visit, then either 1) your ISP has a major equipment failure/overload or 2) there is something wrong with your internal Internet connection e.g. your firewall is not functioning correctly. In the first case, only your ISP can help you.
502 Bad Gateway Meaning
In the second case, you need to fix whatever it is that is preventing you reaching the Internet. If you get this problem for only some of the Web sites you try to visit then it is likely to be a problem at those sites i.e. one of their pieces of equipment is failing/overloaded. Contact the people at those sites. Fixing 502 errors - CheckUpDown Our service monitors your site for HTTP errors like 502. Use of proxies and caching is increasing on the Web. Our CheckUpDown robot will always try to "drill through" to the real computer that actually hosts the Web site, but we do not have complete control over where our HTTP request actually ends up. If only one link in the chain of computers dealing with our HTTP request is broken, then an error such as 502 can easily occur. Please contact us (email preferred) whenever you encounter 502 errors - there is nothing you can do to sort them out. We then have to liaise with your ISP and the vendor of the Web server software so that they can review the flow of IP data traffic between various computers under their control. 502 errors in the HTTP cycle Any client (e.
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504 Bad Gateway
Learn more → 10 How To Troubleshoot Common HTTP Error Codes Posted Oct 24, 2014 77.6k views FAQ Apache Nginx Introduction When accessing a web server or application, every HTTP http://www.checkupdown.com/status/E502.html request that is received by a server is responded to with an HTTP status code. HTTP status codes are three-digit codes, and are grouped into five different classes. The class of a status code can be quickly identified by its first digit: 1xx: Informational 2xx: Success 3xx: Redirection 4xx: Client Error 5xx: Server Error This guide focuses on identifying and troubleshooting https://www.digitalocean.com/community/tutorials/how-to-troubleshoot-common-http-error-codes the most commonly encountered HTTP error codes, i.e. 4xx and 5xx status codes, from a system administrator's perspective. There are many situations that could cause a web server to respond to a request with a particular error code--we will cover common potential causes and solutions. Client and Server Error Overview Client errors, or HTTP status codes from 400 to 499, are the result of HTTP requests sent by a user client (i.e. a web browser or other HTTP client). Even though these types of errors are client-related, it is often useful to know which error code a user is encountering to determine if the potential issue can be fixed by server configuration. Server errors, or HTTP status codes from 500 to 599, are returned by a web server when it is aware that an error has occurred or is otherwise not able to process the request. General Troubleshooting Tips When using a web browser to test a web server, refresh the browser after making server changes Check server logs for more details about how the server is handling the requests. For examp
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings http://stackoverflow.com/questions/5011632/502-http-status-code and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; bad gateway it only takes a minute: Sign up 502 HTTP Status Code up vote 26 down vote favorite 1 According to the RFC: 10.5.3 502 Bad Gateway The server, while acting as a gateway or proxy, received an invalid response from the upstream server it accessed in attempting to fulfill the request. Can invalid response also mean no response at all 502 bad gateway (e.g. connection refused)? http client status share|improve this question asked Feb 16 '11 at 1:35 primroot 6351615 add a comment| 1 Answer 1 active oldest votes up vote 24 down vote accepted Yes. Empty or incomplete headers or response body typically caused by broken connections or server side crash can cause 502 errors if accessed via a gateway or proxy. For more information about the network errors https://en.wikipedia.org/wiki/List_of_HTTP_status_codes share|improve this answer edited Mar 28 at 13:00 Shalu T D 332114 answered Feb 16 '11 at 1:41 blinkingled 30123 Is there a fix for this? My apache server is not crashing... –Arif Jul 29 '15 at 7:35 @Arif Get a more stable connection by selecting a less busy WiFi channel or plugging in a shielded network cable until it locks into place with clean connectors. –Cees Timmerman Jan 7 at 15:18 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google Sign up using Facebook Sign up using Email and Password Post as a guest