Http Error 502 Bad Gateway Apache
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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 Learn more about Stack Overflow the company apache 502 proxy error Business Learn more about hiring developers or posting ads with us Stack Overflow Questions 502 bad gateway apache proxy Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, apache 502 bad gateway just like you, helping each other. Join them; it only takes a minute: Sign up Bad Gateway 502 error with Apache mod_proxy and Tomcat up vote 39 down vote favorite 14 We're running a web app
502 Proxy Error Apache Reverse Proxy
on Tomcat 6 and Apache mod_proxy 2.2.3. Seeing a lot of 502 errors like this: Bad Gateway! The proxy server received an invalid response from an upstream server. The proxy server could not handle the request GET /the/page.do. Reason: Error reading from remote server If you think this is a server error, please contact the webmaster. Error 502 Tomcat has plenty of threads, so it's not thread-constrained. We're pushing 2400 users via JMeter against apache proxy error reading from remote server the app. All the boxes are sitting inside our firewall on a fast unloaded network, so there shouldn't be any network problems. Anyone have any suggestions for things to look at or try? We're heading to tcpdump next. UPDATE 10/21/08: Still haven't figured this out. Seeing only a very small number of these under load. The answers below haven't provided any magical answers...yet. :) java apache tomcat mod-proxy share|improve this question edited Oct 21 '08 at 19:45 community wiki 2 revsAlex Miller I am facing this problem for some time during my running application –Uday A. Navapara Mar 12 '15 at 5:27 add a comment| 7 Answers 7 active oldest votes up vote 32 down vote Just to add some specific settings, I had a similar setup (with Apache 2.0.63 reverse proxying onto Tomcat 5.0.27). For certain URLs the Tomcat server could take perhaps 20 minutes to return a page. I ended up modifying the following settings in the Apache configuration file to prevent it from timing out with its proxy operation (with a large over-spill factor in case Tomcat took longer to return a page): Timeout 5400 ProxyTimeout 5400 Some backgound ProxyTimeout alone wasn't enough. Looking at the documentation for Timeout I'm guessing (I'm not sure) that this is because while Apache is waiting for a respo
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502 Bad Gateway Nginx
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502 Bad Gateway Meaning
posting ads with us Server Fault Questions Tags Users Badges Unanswered Ask Question _ Server Fault is a question and answer site for system and network administrators. Join http://stackoverflow.com/questions/169453/bad-gateway-502-error-with-apache-mod-proxy-and-tomcat them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top Apache VirtualHost setup… 502 Bad Gateway up vote 0 down vote favorite I am trying to set up apache virtual hosts on Ubuntu 12.04 http://serverfault.com/questions/575541/apache-virtualhost-setup-502-bad-gateway lts. I followed this guide here http://www.debian-administration.org/articles/412 except I used /var/www not /home/www. Ive set the document root folder to 755 permissions. It is a server I am running out of my house, so its possible it could be a problem with my router I would think? I am not using a proxy.Is there a certain way port forwarding needs to be set up to run vhosts? (And yes, It worked fine before vhosts. I get a 502 response error (bad gateway). Here are my two enabled sites NameVirtualHost *:80
Post #1 of 6 (7309 views) Permalink mod_proxy issue - intermittent 502 response Hi, I'm running http://www.gossamer-threads.com/lists/apache/users/377583 Apache/2.0.52 as a reverse proxy on a RHE4 box, the backend app server is on a separate machine again RHE4, running Apache/2.0.52 and mod_perl 1.99_16. There are intermittent https://www.digitalocean.com/community/tutorials/how-to-troubleshoot-common-http-error-codes 502 responses being generated by the proxy although a page refresh generally resolves the issue, we are trying to get a configuration of 2 RP boxes in front 502 bad of 3 mod_perl app servers into production but will need to understand / resolve the issue of these intermittent 502 responses first. [Thu Nov 26 15:35:09 2009] [error] [client 88.96.233.45] proxy: error reading status line from remote server xxx.xxxxxx.co.uk, referer: http://xxx.xxxx.co.uk/mens/casual/casual/71/brand-/all-/start- [Thu Nov 26 15:35:09 2009] [error] [client 88.96.233.45] proxy: Error reading from remote server returned 502 bad gateway by /mens/smart/smart/70/brand-/all-/start-, referer: http://xxxx.xxxxxxx.co.uk/mens/casual/casual/71/brand-/all-/start- Can someone shed further light on what the problem is and how to resolve it pls, I'm happy to send virtual host confs if someone wishes to dig little deeper. Note at this point I'm using mod_rewrite [P] to proxy the requests to the app server rather than using ProxyPass as we have many rewrites in the conf. I've googled around and have seen that others have observed similar scenarios when using this setup in Apache 2.0 but have not seen anything specific about a resolution or path to resolution. Your help gratefully appreciated. Kind regards, Cris Cristian Pini Foresite Business Solutions Ltd Tel: 020 8540 0040 Direct: 020 8545 6813 http://www.fsite.com Owen.Boyle at six-group Nov27,2009,1:16AM Post #2 of 6 (7183 views) Permalink RE: mod_proxy issue - intermittent 502 response [In reply to] 502 is bad gateway, which means that apache and the back-end server have got into a protocol argument. Usually this is due to a bad response from the back-end (as your
In submit Tutorials Questions Projects Meetups Main Site logo-horizontal DigitalOcean Community Menu Tutorials Questions Projects Meetups Main Site Sign Up Log In submit View All Results By: Mitchell Anicas Subscribe Subscribed Share Contents Contents We hope you find this tutorial helpful. In addition to guides like this one, we provide simple cloud infrastructure for developers. Learn more → 10 How To Troubleshoot Common HTTP Error Codes Posted Oct 24, 2014 82.4k views FAQ Apache Nginx Introduction When accessing a web server or application, every HTTP 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 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 example, web servers such as Apache or Nginx produce two files called access.log and error.log that can be scanned