If you tried logging into YouTube today, you’ll notice that you got an “Error 502”.
Here’s a quick summary of what that means.
According to RFC 2616, the document which among other things lists the error codes, Error 502 means “Bad Gateway.” That basically means that you can get to the Proxy server or the server that talks to your browser, but not to the servers behind that.
| Your Browser | -> | The Gateway or Proxy Server (Error 502) | -> | YouTube Back End is Dead! |
Wikipedia lists all the error codes, too.