503 Error Server
Contents |
that this is a temporary condition which will be alleviated after some delay. Some servers in this state may also simply refuse the socket connection, in which case a 503 server error sip different error may be generated because the socket creation timed out. Fixing 503 server error 403 errors The Web server is effectively 'closed for repair'. It is still functioning minimally because it can at least respond 503 server not available with a 503 status code, but full service is impossible i.e. the Web site is simply unavailable. There are a myriad possible reasons for this, but generally it is because of some human
503 Server Error Gmail
intervention by the operators of the Web server machine. You can usually expect that someone is working on the problem, and normal service will resume as soon as possible. Please contact the system operators of the Web site (e.g. your ISP) to determine why the service is down. They will be in a much better position to help you than we are for this type of server 502 error error. 503 errors in the HTTP cycle Any client (e.g. your Web browser or our CheckUpDown robot) goes through the following cycle when it communicates with the Web server: Obtain an IP address from the IP name of the site (the site URL without the leading 'http://'). This lookup (conversion of IP name to IP address) is provided by domain name servers (DNSs). Open an IP socket connection to that IP address. Write an HTTP data stream through that socket. Receive an HTTP data stream back from the Web server in response. This data stream contains status codes whose values are determined by the HTTP protocol. Parse this data stream for status codes and other useful information. This error occurs in the final step above when the client receives an HTTP status code that it recognises as '503'. Our company also owns these other Web sites: A simple guide to software escrow. Our really simple guide to web hosting (getting your web site and email addresses on the Internet using your own domain name). Convert text to image file (GIF, JPG, PNG etc.) Free to use. Tips if you want to buy a valuable Internet domain name
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies server error 530 of this site About Us Learn more about Stack Overflow the company
Server Error 500
Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges
503 Service Unavailable
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 http://www.checkupdown.com/status/E503.html minute: Sign up What possibilities can cause “Service Unavailable 503” error? [closed] up vote 40 down vote favorite 9 we have a asp.net MVC application deployed to a server, and but when there is too many request to the server, the client will just get a "503 service unavailable" error. But if I deployed the application to another server ( lower hardware http://stackoverflow.com/questions/4150952/what-possibilities-can-cause-service-unavailable-503-error configuration ), everything worked fine, even more requests it can handle well. My question is what possible configuration can cause the previous server to just throw out a 503 error ? (which means the requests didn't reach our application). asp.net-mvc iis windows-server-2003 http-status-code-503 share|improve this question asked Nov 11 '10 at 2:37 MemoryLeak 3,1161966110 closed as too broad by Flexo♦ Jan 19 '14 at 11:46 There are either too many possible answers, or good answers would be too long for this format. Please add details to narrow the answer set or to isolate an issue that can be answered in a few paragraphs.If this question can be reworded to fit the rules in the help center, please edit the question. 2 In fact there are many possible reasons. –Darin Dimitrov Nov 11 '10 at 5:17 8 Closed? Is it not useful to know what some or all of the many answers are? Stack Overflow is strange. Must not provide all types on information, JUST ONE SPECIFIC TYPE! ;) –Ian Grainger Jul 3 '14 at 8:11 1 Such strange activities of Stac
of the Fastly web interface. Service guides for the next web interface can be accessed at docs-next.fastly.com. For more information see our announcement. Guides Quick Start Guide Account management User access https://docs.fastly.com/guides/debugging/common-503-errors and control Account management and security Account types and billing Customer support Compliance and law About our terms Compliance Security measures Third-party technology Related offerings Translations Archives Basic setup Basic setup Basic configuration About https://en.wikipedia.org/wiki/List_of_HTTP_status_codes Fastly services Advanced setup Securing communications Purging Developer's tools Access Control Lists API Caching Conditions Edge Dictionaries VCL Tutorials Diagnostics and performance Streaming logs Debugging Performance tuning Security Migrations and integrations Migrations Integrations server error Online video streaming Live streaming On-the-fly packaging Home Guides Debugging [JA] 日本語 Common 503 errors Varnish, the software that runs on the Fastly CDN, will sometimes return standardized 503 responses due to various issues that can occur when attempting to fetch data from your origin servers. The generic status text associated with a 503 error is "Service Unavailable." It can mean a wide variety of things. The most 503 server error common reasons this generic text appears include: The origin server generated a 503 error and Fastly passed it through as is. The origin returned a 503 error without a response header, so Fastly used the default response. The status line of the HTTP response from the origin was not parseable. VCL code was run that used the "error" statement without an appropriate response status (e.g., error 503 instead of error 503 "_broken thing_"). The following list provides the most common non-generic, standardized 503 responses and basic explanations for each. WARNING: If you are seeing 503 errors, do not purge all cached content. Purge all overrides stale-if-error and increases the requests to your origin server, which could result in additional 503 errors. 503 Backend Read Error This error typically appears if a timeout error occurs when Fastly cache servers attempt to fetch content from your origins. It can also be due to a variety of transient network issues that might cause a read to fail (e.g., router failovers, packet loss) or an origin overload. Benchmarking your backend response times. Many outside factors cause backends response times to vary. Repeated, consistent Backend Read Errors frequently can be prevented by changing your backend timeout s
referer DNT X-Forwarded-For Status codes 301 Moved Permanently 302 Found 303 See Other 403 Forbidden 404 Not Found 451 Unavailable For Legal Reasons v t e This is a list of Hypertext Transfer Protocol (HTTP) response status codes. It includes codes from IETF internet standards, other IETF RFCs, other specifications, and some additional commonly used codes. 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. The phrases used are the standard wordings, but any human-readable alternative can be provided. Unless otherwise stated, the status code is part of the HTTP/1.1 standard (RFC 7231).[1] The Internet Assigned Numbers Authority (IANA) maintains the official registry of HTTP status codes.[2] Microsoft IIS sometimes uses additional decimal sub-codes to provide more specific information,[3] but not all of those are here (note that these sub-codes only appear in the response payload and in documentation; not in the place of an actual HTTP status code). Contents 1 1xx Informational 2 2xx Success 3 3xx Redirection 4 4xx Client Error 5 5xx Server Error 6 Unofficial codes 6.1 Internet Information Services 6.2 nginx 6.3 CloudFlare 7 See also 8 Notes 9 References 10 External links 1xx Informational[edit] Request received, continuing process. This class of status code indicates a provisional response, consisting only of the Status-Line and optional headers, and is terminated by an empty line. Since HTTP/1.0 did not define any 1xx status codes, servers must not[note 1] send a 1xx response to an HTTP/1.0 client except under experimental conditions.[4] 100 Continue The server has received the request headers and the client should proceed to send the request body (in the case of a request for which a body needs to be sent; for example, a POST request). Sending a large request body to a server after a request has been rejected for inappropriate headers would be inefficient. To have a server check the request's headers, a client must send Expect: 100-continue as a header in its initial request and receive a 100 Continue status code in response before sending the body. The response 417 Expectation Failed indicates the request should not be continued.[2] 101 Switching Protocols The requester has asked the server to switch protocols and the server has agreed to do so.[5] 102 Processing (WebDAV; RFC 2518) A WebDAV request may contain many sub-requests involving file operations, requiring a long time to complete the request. This co