Apache Error 502
Contents |
Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss apache 503 error the workings and policies of this site About Us Learn more about
Apache 502 Proxy Error
Stack Overflow the company Business Learn more about hiring developers or posting ads with us Server Fault Questions 502 proxy error apache error reading from remote server Tags Users Badges Unanswered Ask Question _ Server Fault is a question and answer site for system and network administrators. Join them; it only takes a minute: Sign up
Http 502 Error Apache
Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top Proxy Error 502 “Reason: Error reading from remote server” with Apache 2.2.3 (Debian) mod_proxy and Jetty 6.1.18 up vote 46 down vote favorite 22 Apache is receiving requests at port :80 and proxying them to Jetty at apache 500 error port :8080 The proxy server received an invalid response from an upstream server The proxy server could not handle the request GET /. My dilemma: Everything works fine normally (fast requests, few seconds or few tens of seconds long requests are processed ok). Problems occur when request processing takes long (few minutes?). If I issue request instead directly to Jetty at port :8080 the request is processed OK. So problem is likely to sit somewhere between Apache and Jetty where I am using mod_proxy. How to solve this? I have already tried some "tricks" related to KeepAlive settings, without luck. Here is my current configuration, any suggestions? #keepalive Off ## I have tried this, does not help #SetEnv force-proxy-request-1.0 1 ## I have tried this, does not help #SetEnv proxy-nokeepalive 1 ## I have tried this, does not help #SetEnv proxy-initial-not-pooled 1 ## I have tried this, does not help KeepAlive 20 ## I have tried this, does not help KeepAliveTimeout 600 ## I have tried this, does not help ProxyTimeout 600 ## I have tri
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
Bad Gateway Error 502
(no response to the gateway/proxy), but rather that the upstream server and the gateway/proxy
502 Proxy Error Apache Reverse Proxy
do not agree on the protocol for exchanging data. Given that Internet protocols are quite clear, it often means that one the proxy server received an invalid response from an upstream server. apache reverse proxy 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 http://serverfault.com/questions/185894/proxy-error-502-reason-error-reading-from-remote-server-with-apache-2-2-3-de are 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 http://www.checkupdown.com/status/E502.html help you. 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
504 Gateway Timeout Error 3 503 Service Unavailable 4 500 Internal Server Error 5 How to Fix a 400 Bad Request Error About.com About Tech PC Support http://pcsupport.about.com/od/findbyerrormessage/a/502error.htm . . . Troubleshooting Guides Error Messages 0 to 9 Error Messages 502 http://blog.somepixels.net/en/502-proxy-error-uploading-from-apache-mod_proxy-to-tomcat-7/ Bad Gateway Error (What It Is and How to Fix It) How to Fix a 502 Bad Gateway Error 502 Bad Gateway Error. © THORDOG By Tim Fisher PC Support Expert Share Pin Tweet Submit Stumble Post Share By Tim Fisher Updated August 31, 2016. The 502 Bad Gateway error 502 proxy is an HTTP status code that means that one server received an invalid response from another server.The Bad Gateway error can be customized by each website. While fairly uncommon, different web servers do describe this error differently. Here are some common ways you might see it.How You Might See the 502 Error"502 Bad Gateway""502 Service Temporarily Overloaded""Error 502""Temporary Error (502)""502 Proxy Error""502 Server Error: 502 proxy error The server encountered a temporary error and could not complete your request""HTTP 502""502. That's an error""Bad Gateway: The proxy server received an invalid response from an upstream server""HTTP Error 502 - Bad Gateway"The 502 Bad Gateway error displays inside the Internet browser window, just as web pages do.Twitter's famous "fail whale" error that says Twitter is over capacity is actually a 502 Bad Gateway error (even though a 503 Error would make more sense).A Bad Gateway error received in Windows Update generates a 0x80244021 error code or the message WU_E_PT_HTTP_STATUS_BAD_GATEWAY. continue reading below our video How to Fix Browser Error Codes When Google services, like Google Search or Gmail, are experiencing a 502 Bad Gateway, they often show Server Error, or sometimes just 502, on the screen.502 Bad Gateway errors are completely independent of your particular setup, meaning that you could see one in any browser, on any operating system, and on any device.Cause of 502 Bad Gateway ErrorsOften, Bad Gateway errors are caused by issues between servers online that you have no control over.However, sometimes there is no real issue but your browser thinks there is
API is. We're using mod_proxy to do the job and everything is hosted on Amazon's EC2. Everything was working perfectly, but sometime ago we've started to see some errors, when uploading big files, like this: Proxy Error The proxy server received an invalid response from an upstream server. The proxy server could not handle the request POST /app/api/upload. Reason: Error reading from remote server Apache/2.2.22 (Amazon) Server at our_app_server.com Port 443 We started looking for solutions to this problem and tried a lot of things, like configuring the timeout on Apache's httpd.conf: # Configuring the timeout Timeout 2400 ProxyTimeout 2400 # Configuring the reverse proxy ProxyPass /app http://localhost:8080/app ProxyPassReverse /app http://localhost:8080/app After we've changed the timeout, it got a little better, but didn't solve the problem completely. So, after a lot more googling, we found out that this error on Apache's log: (103)Software caused connection abort: proxy: pass request body failed is caused by a malformed server response and, to ignore it, we could set this option on our httpd.conf: ProxyBadHeader Ignore After this change, it finally revealed to us the real problem: org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.springframework.web.multipart.MultipartException: Could not parse multipart servlet request; nested exception is org.apache.commons.fileupload.FileUploadBase$IOFileUploadException: Processing of multipart/form-data request failed. Read timed out org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:894) org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:789) javax.servlet.http.HttpServlet.service(HttpServlet.java:641) javax.servlet.http.HttpServlet.service(HttpServlet.java:722) org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:312) org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:116) org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:83) o