Agent Error 502
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HodgesFebruary 6, 20082 0 0 0 The following came up a couple of how to fix error 502 weeks ago, and I thought it would be worth posting for
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anyone else who hits the same or a similar problem. When I try to do a error 502 google build using TFS Build I get this error: TF215085: An error occurred while connecting to Agent \Shopping Catalog\Nightly Build: The request failed with HTTP status 502: Bad
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Gateway The solution was to set BypassProxyOnLocal in the registry for TFS on the server (application tier). Note the version number, 9.0, is for TFS 2008. This does not apply to TFS 2005, because the communication with the build agent is different in TFS 2008. [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\VisualStudio\9.0\TeamFoundation\RequestSettings] "BypassProxyOnLocal"="true" Then run iisreset to make sure error 502 libreoffice that the AT picks up the setting change. The following post talks about an unrelated topic, but it covers this setting too. The context is normally the client rather than the server, but in this case the server is acting as a client and calling the build agent. http://blogs.msdn.com/buckh/archive/2007/09/17/tfs-2008-controlling-the-number-of-threads-used-in-uploading-and-downloading-files.aspx Technorati Tags: team foundation server 2008,team build Tags Team Build Team Foundation Server Comments (2) Cancel reply Name Email Website BioSensorAB » HTTP 502 error when the server tries to connect to the build agent to start a build says: February 6, 2008 at 11:07 am PingBack from http://www.biosensorab.org/2008/02/06/http-502-error-when-the-server-tries-to-connect-to-the-build-agent-to-start-a-build/ Reply Team System News says: February 12, 2008 at 10:03 am Charles Sterling on Team System Productivity Case Studies. The Teams WIT Tools Blog on FAQ #5: How do… Reply Follow MetfsbuckSubscribe Subscribe to this blog and receive notifications of new posts by email. Subscribe! Unsubscribe Popular TagsTeam Foundation Server Source Control Team Build TFS 2010 TFS API Work Item Tr
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Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask error 502 proxy error Question x Dismiss Join the Stack Overflow 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 https://blogs.msdn.microsoft.com/buckh/2008/02/06/http-502-error-when-the-server-tries-to-connect-to-the-build-agent-to-start-a-build/ up Error 502 (Bad Gateway) when sending a request with HttpWebRequest over SSL up vote 17 down vote favorite 6 I have the following snippet in classic ASP, to send a command and retrieve the response over SSL: Dim xmlHTTP Set xmlHTTP = Server.CreateObject("Msxml2.ServerXMLHTTP.3.0") xmlHTTP.open "POST", "https://www.example.com", False xmlHTTP.setRequestHeader "Content-Type","application/x-www-form-urlencoded" xmlHTTP.setRequestHeader "Content-Length", Len(postData) xmlHTTP.Send postData If xmlHTTP.status = 200 And Len(message) > http://stackoverflow.com/questions/2159361/error-502-bad-gateway-when-sending-a-request-with-httpwebrequest-over-ssl 0 And Not Err Then Print xmlHTTP.responseText End If Then I used this code as a reference to reimplement the request in c#: private static string SendRequest(string url, string postdata) { WebRequest rqst = HttpWebRequest.Create(url); // We have a proxy on the domain, so authentication is required. WebProxy proxy = new WebProxy("myproxy.mydomain.com", 8080); proxy.Credentials = new NetworkCredential("username", "password", "mydomain"); rqst.Proxy = proxy; rqst.Method = "POST"; if (!String.IsNullOrEmpty(postdata)) { rqst.ContentType = "application/x-www-form-urlencoded"; byte[] byteData = Encoding.UTF8.GetBytes(postdata); rqst.ContentLength = byteData.Length; using (Stream postStream = rqst.GetRequestStream()) { postStream.Write(byteData, 0, byteData.Length); postStream.Close(); } } ((HttpWebRequest)rqst).KeepAlive = false; StreamReader rsps = new StreamReader(rqst.GetResponse().GetResponseStream()); string strRsps = rsps.ReadToEnd(); return strRsps; } The problem is, when calling GetRequestStream I keep getting a WebException with the message "The remote server returned an error: (502) Bad Gateway." At first I thought it had to do with the SSL certificate verification. So I added this line: ServicePointManager.CertificatePolicy = new AcceptAllCertificatePolicy(); Where public class AcceptAllCertificatePolicy : ICertificatePolicy { public bool CheckValidationResult(ServicePoint srvPoint, System.Security.Cryptography.X509Certificate certificate, WebRequest request, int certificateProblem) { return true; } } And I keep getting the same 502 error. Any ideas? c# ssl httpwebrequest system.net.webexce
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 http://www.checkupdown.com/status/E502.html response to the gateway/proxy), but rather that the upstream server and the gateway/proxy do not agree on the protocol for exchanging data. Given that 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 between back-end computers, possibly including the Web server at the site you are trying error 502 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 agent error 502 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