Proxy Error 502 Connection Refused
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and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring please explain this 502 bad gateway error 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 6.2 million programmers, just like you, helping each other. Join them; 504 bad gateway it only takes a minute: Sign up HTTPError: HTTP Error 502: Proxy Error ( Connection refused ) up vote 1 down vote favorite I am continuously getting connection Proxy error 502 (connection refused) on Google app engine while running the devserver locally. proxy is by passed for localserver but still its its refusing the connection. here is what I am getting: HTTPError() HTTPError() Traceback (most recent call last): File "/home/arslan/GAE/google_appengine/lib/cherrypy/cherrypy/wsgiserver/wsgiserver2.py", line 1302, in communicate req.respond() File "/home/arslan/GAE/google_appengine/lib/cherrypy/cherrypy/wsgiserver/wsgiserver2.py", line 831, in respond self.server.gateway(self).respond() File "/home/arslan/GAE/google_appengine/lib/cherrypy/cherrypy/wsgiserver/wsgiserver2.py", line 2115, in respond response = self.req.server.wsgi_app(self.env, self.start_response) File "/home/arslan/GAE/google_appengine/google/appengine/tools/devappserver2/wsgi_server.py", line 250, in __call__ return app(environ, start_response) File "/home/arslan/GAE/google_appengine/google/appengine/tools/devappserver2/request_rewriter.py", line 311, in _rewriter_middleware response_body = iter(application(environ, wrapped_start_response)) File "/home/arslan/GAE/google_appengine/google/appengine/tools/devappserver2/python/request_handler.py", line 89, in __call__ self._flush_logs(response.get('l
This server received an invalid response from an upstream server it accessed to fulfil the request. This usually does not mean
502 Proxy Error
that the upstream server is down (no response to the gateway/proxy), but 502 police code rather that the upstream server and the gateway/proxy do not agree on the protocol for exchanging data. Given that
The Proxy Server Received An Invalid Response From An Upstream Server.
Internet protocols are quite clear, it often means that one or both machines have been incorrectly or incompletely programmed. Fixing 502 errors - general This problem is due to poor IP communication http://stackoverflow.com/questions/17710860/httperror-http-error-502-proxy-error-connection-refused between back-end computers, possibly including the Web server at the site you 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 http://www.checkupdown.com/status/E502.html internal Internet connection e.g. your firewall is not functioning correctly. In the first case, only your ISP can 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 th
Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the http://serverfault.com/questions/185894/proxy-error-502-reason-error-reading-from-remote-server-with-apache-2-2-3-de workings and policies of this site About Us Learn more about Stack https://social.technet.microsoft.com/Forums/systemcenter/en-US/00f7a091-03e0-4952-a9b4-147d485a3059/http11-502-proxy-error-connection-refused-nvia-11-tmg01-spnconnection?forum=Forefrontedgegeneral Overflow the company Business Learn more about hiring developers or 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 them; it only takes a minute: Sign up Here's how bad gateway 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 47 down vote favorite 24 Apache is receiving requests at port :80 and proxying them to Jetty at port :8080 502 bad gateway 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 tried this, does not help NameVirtu
(עברית)المملكة العربية السعودية (العربية)ไทย (ไทย)대한민국 (한국어)中华人民共和国 (中文)台灣 (中文)日本 (日本語) Home2012Previous VersionsLibraryForumsGallery Ask a question Quick access Forums home Browse forums users FAQ Search related threads Remove From My Forums Answered by: HTTP/1.1 502 Proxy Error ( Connection refused )\nVia: 1.1 TMG01 -SP\nConnection Forefront > Forefront TMG and ISA Server Question 0 Sign in to vote Hi, I have an application that executes calls to a jetty server locally. When I try to run the application I get the error below. HTTP/1.1 502 Proxy Error ( Connection refused )\nVia: 1.1 TMG01-SP\nConnection: Keep-Alive\nProxy-Connection: Keep-Alive\nPragma: no-cache\nCache-Control: no-cache\nContent-Type: text/html\nContent-Length: 3904 \n But, this error only occurson a particular machine, when I run the the same application on other machines have no problems. Someone knows what could be? I disabled the firewall, proxy, includes rules on the firewall but nothing does this application working. Edited by aokubo Wednesday, September 24, 2014 9:21 PM Wednesday, September 24, 2014 9:17 PM Reply | Quote Answers 0 Sign in to vote Do you have access to the TMG server where this request is hitting. Please let me know what error you are getting on TMG Logging. Marked as answer by aokubo Thursday, September 25, 2014 8:14 PM Thursday, September 25, 2014 6:36 AM Reply | Quote 0 Sign in to vote Hi Namrata, thanks for your help, I installed Forefront TMG Client on my computer and the application worked. Thank you :) Marked as answer by Susie LongModerator Friday, October 10, 2014 4:52 AM Thursday, September 25, 2014 8:02 PM Reply | Quote All replies 0 Sign in to vote Do you have access to the TMG server where this request is hitting. Please let me know what error you are getting on TMG Logging. Marked as answer by aokubo Thursday, September 25, 2014 8:14 PM Thursday, September 25, 2014 6:36 AM Reply | Quote 0 Sign in to vote Hi Namrata, thank to answer my question, I haven't access to TMG Server. But, I get a error page from ForeFront wit