Date registered: Jan 2005
Vehicle: 1992 W126 300 SE
Location: Head in the clouds
Mentioned: 0 Post(s)
Quoted: 2 Post(s)
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A server (not necessarily a Web server) is acting as a gateway or proxy to fulfil the request by the client (e.g. your Web browser or our CheckUpDown robot) to access the requested URL. This server did not receive a timely response from an upstream server it accessed to deal with your HTTP request.504 errors in the HTTP cycle
This usually means that the upstream server is down (no response to the gateway/proxy), rather than that the upstream server and the gateway/proxy do not agree on the protocol for exchanging data.
Any client (e.g. your Web browser or our CheckUpDown robot) goes through the following cycle when it communicates with your Web server:WTF does that mean? I am hoping one of the smart people here (like guage,dkein or Jayhawk) can explain this to me in simple terms?
This error occurs in the final step above when the client receives an HTTP status code that it recognises as '504'.
- Obtain an IP address from the IP name of your site (your 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 your 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.
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