Iis Error 502 2 0
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Server Web App Gallery Microsoft Azure Tools Visual Studio Expression Studio Windows Internet Explorer WebMatrix Web Platform Installer Get Help: Ask a Question in our Forums More Help Resources Blogs Forums HomeLearnExtensionsChapter 4. Troubleshooting 502 bad gateway nginx Application Request RoutingTroubleshooting 502 Errors in ARR Troubleshooting 502 Errors in ARR By 502 bad gateway meaning Richard MarrApril 9, 2012Tools Used in this Troubleshooter: IIS Failed Request Tracing Network Monitor Winhttp Tracing This material is 502 bad gateway fix provided for informational purposes only. Microsoft makes no warranties, express or implied. HTTP 502 - Overview When working with IIS Application Request Routing (ARR) deployments, one of the errors that you may please explain this 502 bad gateway error see is "HTTP 502 - Bad Gateway". The 502.3 error means that - while acting as a proxy - ARR was unable to complete the request to the upstream server and send a response back to the client. This can happen for multiple reasons - for example: failure to connect to the server, no response from the server, or the server took too
Azure 502 - Web Server Received An Invalid Response
long to respond (time out). If you are able to reproduce the error by browsing the web farm from the controller, and detailed errors are enabled on the server, you may see an error similar to the following: Figure 1 (Click image to expand) The root cause of the error will determine the actions you should take to resolve the issue. 502.3 Timeout Errors The error code in the screenshot above is significant because it contains the return code from WinHTTP, which is what ARR uses to proxy the request and identifies the reason for the failure. You can decode the error code with a tool like err.exe. In this example, the error code maps to ERROR_WINHTTP_TIMEOUT. You can also find this information in the IIS logs for the associated website on the ARR controller. The following is an excerpt from the IIS log entry for the 502.3 error, with most of the fields trimmed for readability: sc-status sc-substatus sc-win32-status time-taken 502 3 12002 29889 The win32 status 12002 maps to the same ERROR_WINHTTP_TIMEOUT error reported in the error page. What exactly timed-out? We investigate this a bit further
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504 Bad Gateway
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Start 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 http://serverfault.com/questions/734062/why-am-i-getting-a-502-error-with-arr-only-when-ssl-is-enabled 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 http://stackoverflow.com/questions/22822944/http-error-502-2-bad-gateway-configuring-iis-7-with-python-2-7 administrators. Join 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 Why am I bad gateway getting a 502 error with ARR only when SSL is enabled? up vote 1 down vote favorite I have a configuration with ARR on a front-end server and an IIS (8) web farm behind it. SSL is enabled with the same certificate on the ARR server and the IIS web farm servers and I am not using SSL offloading. The servers are using Shared Config so the setup is theoretically identical. Interestingly, 502 bad gateway when the ARR round robin configuration hits ONE of the servers, it returns a "502 - Web server received an invalid response while acting as a gateway or proxy server." error. Another server returns the page fine with SSL working. If I point my browser to the "bad" server directly, without ARR, it works fine in HTTPS / SSL mode. I checked the configurations and found nothing different between the servers and even enabled Failed Request Tracing on the ARR server, which wasn't that helpful but I saw a different 502.3 error within the log. Why would I get a 502 error of any kind, especially on just one server in the farm when they are configured identically with shared config and certificates are on all servers? iis ssl arr share|improve this question asked Nov 5 '15 at 5:35 stackonfire 1343 add a comment| 1 Answer 1 active oldest votes up vote 1 down vote Let me answer my own question... I disabled "Require Server Name Indication" and suddenly everything worked. This is weird because SNI was enabled on all servers in the farm for the same site but for one of them, unchecking it made it all work. My theory is this: Even with shared config, SSL binding information doesn't really transfer fro
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 Business Learn more about hiring 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 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up HTTP Error 502.2 - Bad Gateway Configuring IIS 7 with Python 2.7 up vote 0 down vote favorite I am a newbie to Stack Overflow (first post), but really see the use of this website. I'm stumped. We are trying to setup IIS 7.0 to run with WinPython 2.7 on a Windows 7 machine. I am an IIS newb, but veteran Python user. IIS 7 can NOT find a library, which python finds, and executes, perfectly when ran on it's own. When executed via IIS, the script fails with a traceback, and IIS returns the 502.2. I found this thread http://forums.iis.net/p/1209465/2073173.aspx?HTTP+Error+502+2+Bad+Gateway+Frustrations but the advised solution is simply another troubleshooting suggestion. I found IIS's description (http://support.microsoft.com/kb/942057) of the error helpful, but futile. I found Python's start-up options/parameters helpful (http://docs.python.org/2/using/cmdline.html), but futile. I found IIS's advice for configuring Python helpful (http://support.microsoft.com/kb/276494, but (questionably?) incomplete. This thread on manually defining an alternate bin folder (http://forums.asp.net/t/1303052.aspx?Tell+IIS+to+load+dll+from+another+directory+not+Bin+web+config+) might be where my solution lies, but I don't think it is because of the fact that this all worked on 2.6 without doing that to IIS. IIS seems to allow python to import any module that is just a python script. As soon as it gets to a *.pyd (basically just python's version of a dll file) file, it screams. I'm no pro when it comes to DLLs and windows environments, but wouldn't IIS have to have paths to a bin folder of some kind? Do I have to manually edit them, as discussed in the last link above? ACTUAL ERROR Details below for DLL failed Load: The Error : " HTTP Error 502.2 - Bad Gateway The specified CGI application misbehaved by not returning a complete set of HTTP headers. The headers it did return are "Traceback (most recent call last): File "\esto