502 Bad Gateway Proxy Error
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Nginx Reverse Proxy 502 Bad Gateway
get through to a website Viv is trying to reach Freecycle but is getting a 502 Bad Gateway error. If you can't get through to a error 502 bad gateway hostgator website, here are five things you can try.... This type of error comes from the server, and usually has nothing to do with your PC Jack Schofield Thursday 1 August 2013 11.03 EDT Last modified on Thursday 1 August 2013 11.39 EDT Share on error 502 bad gateway cloudflare Facebook Share on Twitter Share via Email Share on LinkedIn Share on Google+ Share on WhatsApp Share on Messenger I keep getting an error message, 502 Bad Gateway nginx/0.7.67, when I try to access the Freecycle site. I have rebooted my PC and used 'system restore' several times, but haven't been able to clear it. Do you know how to sort this out? Viv The 'Bad Gateway' error is coming from the server, and usually has nothing to do with your PC. It may just
Please Explain This 502 Bad Gateway Error
be that the site is overloaded. Often, simply refreshing or reloading the page (Ctrl-F5) will work, but sometimes the problem can persist for days. If so, you could log the time(s) and browser version and submit an error report to the webmaster, because 502 errors can be caused by bugs in the associated PHP programming. In this case, email the admin team at myfreecycleadmin@freecycle.org. If it's an intermittent fault, the simplest option is to wait for 10 minutes and then try again. There are a few things that you can do to try to get through to a site when you get a 502 Bad Gateway error. It's hard to know whether they actually work. It might be that doing them is simply introducing a delay and the site would have worked if you hadn't bothered. Either way, it's useful to have a few things to try when you can't get through to any website. Has it crashed? One of the first things I do when a site isn't responding is to paste its web address or URL (Uniform Resource Locator) into the box at Down for everyone or just me? This will check the site and tell you if it has crashed, in which case, nobody else can get through either. In some cases, you might still be able to get the information you need, either by using the version cached by a search engine such as Google (click the down-arrow next to the web address), or by using a co
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 502 bad gateway nginx response to the gateway/proxy), but rather that the upstream server and the gateway/proxy do 502 bad gateway meaning not agree on the protocol for exchanging data. Given that Internet protocols are quite clear, it often means that one or
502 Bad Gateway Fix
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 trying https://www.theguardian.com/technology/askjack/2013/aug/01/502-bad-gateway-error 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. In http://www.checkupdown.com/status/E502.html 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.g. your W
Server Web App Gallery Microsoft Azure Tools Visual Studio Expression Studio Windows Internet Explorer WebMatrix Web Platform Installer Get Help: Ask a Question in our Forums More Help Resources Blogs http://www.iis.net/learn/extensions/troubleshooting-application-request-routing/troubleshooting-502-errors-in-arr Forums HomeLearnExtensionsChapter 4. Troubleshooting Application Request RoutingTroubleshooting 502 Errors in ARR Troubleshooting 502 Errors in ARR By Richard MarrApril 9, 2012Tools Used in this Troubleshooter: IIS Failed Request Tracing https://technet.microsoft.com/en-us/library/bb794799.aspx Network Monitor Winhttp Tracing This material is provided for informational purposes only. Microsoft makes no warranties, express or implied. HTTP 502 - Overview When working with IIS Application Request Routing 502 bad (ARR) deployments, one of the errors that you may see is "HTTP 502 - Bad Gateway". The 502.3 error means that - while acting as a proxy - ARR was unable to complete the request to the upstream server and send a response back to the client. This can happen for multiple reasons - for example: failure to connect 502 bad gateway to the server, no response from the server, or the server took too long to respond (time out). If you are able to reproduce the error by browsing the web farm from the controller, and detailed errors are enabled on the server, you may see an error similar to the following: Figure 1 (Click image to expand) The root cause of the error will determine the actions you should take to resolve the issue. 502.3 Timeout Errors The error code in the screenshot above is significant because it contains the return code from WinHTTP, which is what ARR uses to proxy the request and identifies the reason for the failure. You can decode the error code with a tool like err.exe. In this example, the error code maps to ERROR_WINHTTP_TIMEOUT. You can also find this information in the IIS logs for the associated website on the ARR controller. The following is an excerpt from the IIS log entry for the 502.3 error, with most of the fields trimmed for readability: sc-status sc-substatus sc-win32-status time-taken 502
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