502 Proxy Error Apache Iis
Contents |
servers are not directly visible from internet. Some of these servers run IIS and ASP.NET web applications. When accessing these servers through internet then sometimes Apache reports a apache proxy iis problems problem: 502 proxy error. NB! This blog is moved to gunnarpeipman.com Click 502 proxy error apache error reading from remote server here to go to article 13 Comments This post is very timely. I just set up dev environments for me and 502 proxy error apache reverse proxy my co-workers at my job, and this issue has been frustrating us. Many thanks. Micah Nolte - Wednesday, February 11, 2009 6:15:30 PM You are welcome :) DigiMortal - Wednesday, February 11, 2009 502 proxy error dns lookup failure 6:47:25 PM Nice blog I am facing same problem. I have done the above mentioned changes SetEnv. But still getting the same error.I am using apache 2.2.3 kiran - Tuesday, August 11, 2009 10:33:01 AM This solution worked for me, thanks for posting it Justin - Wednesday, August 26, 2009 11:17:17 AM Good Solution.. Worked for me.. Henry - Thursday, September 3, 2009 11:03:39 AM Firstly, I
502 Proxy Error Reason Error Reading From Remote Server
would like to know the impact of 502 error. When the apache act as proxy reported 502, how the apache will assume the status of IIS servers? On other hand, the two setenv will fallback to httpd/1.0 without keepalive. Does it may increaes the TCP sockets needed to be opened as no more keepalive? This will increase the loading for the IIS server. Ivan Tsui - Monday, September 21, 2009 9:19:39 AM I am getting this error in two scenarious after this env setting is done, if the request that is made from the browser is time taking/bigger size data as a result. and observed if number of simultaneous requests are in the range of 5-10 Please help me kiran - Friday, May 14, 2010 7:27:59 AM Althu, this was written in 2009, but helped me last day. Was having same issue and was unable to find root couse. This helps. Thanks a lot and keep up the good things. Fasih Hansmukh - Tuesday, May 10, 2011 11:40:44 AM Great! This is exactly what I was looking for and it works! Thanks! Eric - Friday, June 17, 2011 7:57:25 PM I had a similar problem and resorted to turning of
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us
502 Proxy Error Openshift
Learn more about Stack Overflow the company Business Learn more about hiring developers or 502 proxy error chrome posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow 502 proxy error web service Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up 502 Proxy Errors between IIS and Apache2 up vote http://weblogs.asp.net/gunnarpeipman/apache-iis-and-502-proxy-error 6 down vote favorite I am currently running apache2 on a SUSE instance @EC2. As part of my site, my data uses mod_proxy to hit a REST server running IIS via Proxy/ReverseProxy. After setting up my vhosts, enabling mod_proxy and establishing my config, I found that I was frequently encountering 502 errors. These errors were of the Proxy Error and Bad Gateway flavour. After doing some considerable http://stackoverflow.com/questions/12303087/502-proxy-errors-between-iis-and-apache2 google, I found that there was a difference in the way IIS and apache terminate their connections which was causing the error. After setting the following environment variables, performance has improved markedly: SetEnv force-proxy-request-1.0 1 SetEnv proxy-nokeepalive 1 SetEnv proxy-initial-not-pooled 1 What I'm wondering is why this works and what an ideal configuration would look like. Is my understanding that, with the Env variables: I am forcing an HTTP 1.0 request (which will standardize the termination expectaions) NOT keeping alive any connections NOT using any pooled connections correct? What if I need to use pooled connections? What if I want to use keep-alives? In short, I'm looking for best practices to replace the toothpick and glue solution I'm currently using apache iis proxy mod-proxy share|improve this question edited Oct 8 '12 at 11:14 gks 2,35131436 asked Sep 6 '12 at 15:08 user1026361 2,18011017 add a comment| 2 Answers 2 active oldest votes up vote 2 down vote I see this question has been around for a while, so I thought I would throw in my 2 cents. More of my experience anyways... As far as I am aware those three env variables or settings are ok in production. Your understanding
Web Platform Installer Get Help: Ask a Question in our Forums More Help Resources Blogs Forums Home IIS.NET Forums IIS 5 & IIS 6 Troubleshooting Intermittent 502 Proxy Error Intermittent https://forums.iis.net/t/next/1123546 502 Proxy Error RSS 2 replies Last post Jul 23, 2007 06:46 AM by azkotoki ‹ Previous Thread|Next Thread › Print Share Twitter Facebook Email Shortcuts Active Threads Unanswered Threads Unresolved Threads http://www.tech-faq.com/502-proxy-error.html Advanced Search Reply carrics3 1 Post Intermittent 502 Proxy Error May 01, 2007 12:23 PM|carrics3|LINK Hello, We are hosting our application on a local server with IIS6.0here in our college. Periodically, 502 proxy (about 1 in 5 page loads) we get a 502 proxy error. 502 Proxy Error The proxy server received an invalid response from an upstream server. The proxy server could not handle the request GET/Customer/Routes.aspx . Reason: Error reading from remote server Apache/2.2.3 (Unix) PHP/5.1.4 Server at routefinder.computing.dcu.ie Port 80 Most of the time, refreshing the page brings up the 502 proxy error page, only for it to occur a few clicks later. Could anyone point us in the correct direction? We have been onto our proxy admin but they point to server problems on our end as the issue. Any help much appreciated.. Reply tomkmvp 9756 Posts MVPModerator Re: Intermittent 502 Proxy Error May 02, 2007 08:38 AM|tomkmvp|LINK This is going to be hard to figure out and google indicates it's a pretty common problem. Is there anyway you can test your app by bypassing the proxy? Tom Kaminski (former IIS MVP 2002-2010) http://mvp.support.microsoft.com/ Reply azkotoki 1 Post Re: Intermittent 502 Proxy Error Jul 23, 2007 06:46 AM|azkotoki|LINK Hi, If you have control over the apache server config, try adding this line on the virtual host which proxies the requests to the IIS server: ProxyBadHeader Ignore Hope this solves the problem... ‹ Previous Thread|Next Thread › This site is managed for Microsoft by Neudesic, LLC. | © 2016 Microsoft. All rights reserved. Privacy Statement Terms of Use Contact Us Advertise With Us Hosted on Microsoft Azure Follow us on: Twitter Facebook Microsoft Feedback on IIS Powered by IIS8
a proxy server. The problem is typically caused for one of two reasons: 1 – The Internet Security and Acceleration (ISA) is configured to throw a proxy error to help guard against external or internally-based Internet threats, and 2- The client or server computers are misconfigured or using outdated software. What is a 502 Proxy Error? A 502 proxy error is typically thrown in the HTTP cycle. When the error occurs, a server (does not have to be a Web server) is filling a role similar to a proxy or a gateway server. When a client computer sends an HTTP request (typically a web browser, but can be any software application that is capable of making an HTTP request), it will pass through the server in order to obtain access to the desired URL. The proxy or gateway subsequently receives a 502 error, or invalid response, from the server located “upstream” in the attempt to fulfill the client request. The majority of the time the error is thrown, the upstream server is functioning appropriately. The proxy or gateway and upstream servers just cannot agree on the appropriate protocol for exchanging the information requested in the original client HTTP request. In many of these cases, either the proxy or upstream server are not configured correctly or are running incompatible software. Why Does a 502 Proxy Error Get Thrown? During a typical web browsing session, the following is an example of the classic HTTP cycle when a client computer and web server are communicating: Client Computer: The IP address of the desired website will be obtained from the URL of the site from the DNS server. Client Computer: The computer obtains an IP socket connection to the desired IP address and then sends an HTTP data stream through the IP address. Web Server: HTTP data is sent back to the client computer in response to the original HTTP request. The HTTP response will include status codes and other useful information for the client computer. Client Computer: If there is an error in the client’s request or server’s ability to respond, there will be an HTTP error code of 502 included in the server’s response (502 Proxy Error). How to Fix 502 Proxy Errors (Client Side) One of the most frustrating things for the average computer user is determining where the problem resides when receiving the 502 Proxy Error. Be