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Http Connection Error 502


org.springframework.http. The phrases used are the standard wordings, but any human-readable alternative can be provided. http client status share|improve this question asked Feb 16 '11 at 1:35 primroot 6351615 add a comment| 1 Answer 1 active oldest votes up vote 24 down vote accepted Yes. Note: previous versions of this specification recommended a maximum of five redirections. navigate here

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. 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. The first digit of the status code specifies one of five classes of response; an HTTP client must recognise these five classes at a minimum. Assuming you've followed the above troubleshooting advice, now would be the time to reinstall your browser and see if that corrects the problem.  Download Software Update 1 for Microsoft Forefront Threat Management Gateway (TMG) 2010 Service Pack 1 if you have MS Forefront TMG SP1 installed and receive ​the message​ Error Code: 502 Proxy Error. http://www.checkupdown.com/status/E502.html

502 Error Nginx

See my Free & Public DNS Servers list for your options. Contacting the website directly might also be a good idea. If the server does not know, or has no facility to determine, whether or not the condition is permanent, the status code 404 (Not Found) SHOULD be used instead. If a Content-Length header field is present in the response, its value MUST match the actual number of OCTETs transmitted in the message-body. - Date - ETag and/or Content-Location, if the header would have been sent in a 200 response to the same request - Expires, Cache-Control, and/or Vary, if the field-value might differ from that sent in any previous response for the same variant If the 206 response is the result of an If-Range request that used a strong cache validator (see section 13.3.3), the response SHOULD NOT include other entity-headers. Some temporary issues with your computer and how it's connecting to your network could be causing 502 errors, especially if you're seeing the error on more than one website.

Avoiding the limit notation during long algebraic manipulations Why is a lottery conducted for sick patients to be cured? httpstatus. Except when responding to a HEAD request, the server SHOULD include an entity containing an explanation of the error situation, and whether it is a temporary or permanent condition. 504 Bad Gateway No URL found.

Retrieved 16 October 2015. ^ Delta encoding in HTTP. Article What to do with 'DNS Server Not Responding' issues on your network Get the Most From Your Tech With Our Daily Tips Email Address Sign Up There was an error. Retrieved October 24, 2009. ^ "Enum HttpStatus". http://pcsupport.about.com/od/findbyerrormessage/a/502error.htm The newly created resource can be referenced by the URI(s) returned in the entity of the response, with the most specific URI for the resource given by a Location header field.

For example, web servers such as Apache or Nginx produce two files called access.log and error.log that can be scanned for relevant information Keep in mind that HTTP status code definitions are part of a standard that is implemented by the application that is serving requests. 502 Proxy Error The RFC specifies this code should be returned by teapots requested to brew coffee.[50] This HTTP status is used as an easter egg in some websites, including Google.com.[51] 421 Misdirected Request (RFC 7540) The request was directed at a server that is not able to produce a response (for example because a connection reuse).[52] 422 Unprocessable Entity (WebDAV; RFC 4918) The request was well-formed but was unable to be followed due to semantic errors.[15] 423 Locked (WebDAV; RFC 4918) The resource that is being accessed is locked.[15] 424 Failed Dependency (WebDAV; RFC 4918) The request failed due to failure of a previous request (e.g., a PROPPATCH).[15] 426 Upgrade Required The client should switch to a different protocol such as TLS/1.0, given in the Upgrade header field.[53] 428 Precondition Required (RFC 6585) The origin server requires the request to be conditional. Fixing 502 error code Both the proxy and upstream server should be programmed correctly and completely.The IP communication between back-end computers should be good.Before analysing this problem, you should clear your browser cache completely.If you see this problem for all the sites you 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. Retrieved November 11, 2015. ^ Sigler, Chris. "416 Requested Range Not Satisfiable".

502 Bad Gateway Fix

Docs.cpanel.net. ietf.org. 502 Error Nginx Its purpose is to allow a server to accept a request for some other process (perhaps a batch-oriented process that is only run once per day) without requiring that the user agent's connection to the server persist until the process is completed. 502 Bad Gateway Meaning new function(){} vs new Function(); How can I Avoid Being Frightened by the Horror Story I am Writing?

What does 502 Bad Gateway mean? check over here The response MUST include a WWW-Authenticate header field (section 14.47) containing a challenge applicable to the requested resource. Check out that link above for more detailed help on restarting your equipment if you need it.  Change your DNS servers, either on your router or on your computer or device. By using this site, you agree to the Terms of Use and Privacy Policy. Please Explain This 502 Bad Gateway Error

For example, including local annotation information about the resource might result in a superset of the metainformation known by the origin server. Note: The existence of the 503 status code does not imply that a server must use it when becoming overloaded. If the user is unexpectedly getting a 403 Forbidden error, ensure that it is not being caused by your .htaccess settings. http://orgias.org/bad-gateway/http-1-1-502-internal-error-server-connection-terminated.html Retrieved November 11, 2015. ^ user27828. "GET Request - Why is my URI so long?".

Clients such as search engines should remove the resource from their indices.[41] Most use cases do not require clients and search engines to purge the resource, and a "404 Not Found" may be used instead. 411 Length Required The request did not specify the length of its content, which is required by the requested resource.[42] 412 Precondition Failed (RFC 7232) The server does not meet one of the preconditions that the requester put on the request.[43] 413 Payload Too Large (RFC 7231) The request is larger than the server is willing or able to process. 502 Police Code Retrieved January 8, 2015. ^ "ngx_http_request.h". In the first case, only your ISP can help you.

Given that Internet protocols are quite clear, it often means that one or both machines have been incorrectly or incompletely programmed.

nginx inc. This means that the user must provide credentials to be able to view the protected resource. Often the result of too much data being encoded as a query-string of a GET request, in which case it should be converted to a POST request.[45] Called "Request-URI Too Long" previously.[46] 415 Unsupported Media Type The request entity has a media type which the server or resource does not support. Http 501 the user does not have the necessary credentials.

Retrieved 16 October 2015. ^ "Twitter Error Codes & Responses". Retrieved 16 October 2015. ^ "Mozilla Bugzilla Bug 187996: Strange behavior on 305 redirect". Does the file exist in the correct location on the server? weblink The range header is used by HTTP clients to enable resuming of interrupted downloads, or split a download into multiple simultaneous streams.[14] 207 Multi-Status (WebDAV; RFC 4918) The message body that follows is an XML message and can contain a number of separate response codes, depending on how many sub-requests were made.[15] 208 Already Reported (WebDAV; RFC 5842) The members of a DAV binding have already been enumerated in a previous reply to this request, and are not being included again.[16] 226 IM Used (RFC 3229) The server has fulfilled a request for the resource, and the response is a representation of the result of one or more instance-manipulations applied to the current instance.[17] 3xx Redirection[edit] This class of status code indicates the client must take additional action to complete the request.

Index File Does Not Exist If the user is trying to access a directory that does not have a default index file, and directory listings are not enabled, the web server will return a 403 Forbidden error. You do not need to start Windows in Safe Mode to run any browser in its particular "Safe Mode." Try another browser. Did the user type in the wrong URL? The client MAY repeat the request with a suitable Proxy-Authorization header field (section 14.34).

Unless the request method was HEAD, the entity of the response SHOULD contain a short hypertext note with a hyperlink to the new URI(s) , since many pre-HTTP/1.1 user agents do not understand the 307 status. Iana.org. The response body SHOULD include enough information for the user to recognize the source of the conflict. Continue Reading Up Next Up Next Article Getting a 500 Internal Server Error?

https://tools.ietf.org/html/rfc2518. Retrieved 16 October 2015. ^ "HTTP Error 505 - HTTP version not supported". This interim response is used to inform the client that the initial part of the request has been received and has not yet been rejected by the server. Is turning off engines before landing "Normal"?

It's best to remove them all but it won't hurt to try the clearly applicable one(s) first.  Start your browser in Safe Mode. January 2002. a Web accelerator) that received a 200 OK from its origin, but is returning a modified version of the origin's response.[10][11] 204 No Content The server successfully processed the request and is not returning any content.[12] 205 Reset Content The server successfully processed the request, but is not returning any content. Please try again.

httpstatus. Google Developers API uses this status if a particular developer has exceeded the daily limit on requests.[35] 21.co Bitcoin micropayment service uses this status in response for every client http request.[36] 403 Forbidden The request was a valid request, but the server is refusing to respond to it. W3.