CodeAcademy Read only

Any body noticed that the forums went into read only mode but today it is better? Is this just me or everyone else? In read only mode you can’t post or do any interactions with the webpage. Is it a glitch or a lockdown?

It was an upgrade. The forums were read only during the upgrade. The forums should be working better now.

Ok I see what do you mean that they work better now?

He means that it is not on read-only mode from now ownards… And they have improved the site… for example the layout of someones profile completely changed.

I haven’t seen any 502 errors since the upgrade. Before that they were nearly constant.

What are 502 errors?

I don’t know if this is very helpful, but this is what Wikipedia says that they are:

502 Bad Gateway
The server was acting as a gateway or proxy and received an invalid response from the upstream server.

Good example by

HTTP Error 502 Bad gateway

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 received an invalid response from an upstream server it accessed to fulfil the request.

This usually does not mean that the upstream server is down (no response to the gateway/proxy), but rather that the upstream server and the gateway/proxy do not agree on the protocol for exchanging data. Given that Internet protocols are quite clear, it often means that one or both machines have been incorrectly or incompletely programmed.

###Fixing 502 errors - general
This problem is due to poor IP communication between back-end computers, possibly including the Web server at the site you are trying to visit. Before analysing this problem, you should clear your browser cache completely.

If you are surfing the Web and see this problem for all Web sites you try to 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. your firewall is not functioning correctly. In the first case, only your ISP can help you. In the second case, you need to fix whatever it is that is preventing you reaching the Internet.

If you get this problem for only some of the Web sites you try to visit then it is likely to be a problem at those sites i.e. one of their pieces of equipment is failing/overloaded. Contact the people at those sites.

###Fixing 502 errors - CheckUpDown
Our service monitors your site for HTTP errors like 502. Use of proxies and caching is increasing on the Web. Our CheckUpDown robot will always try to “drill through” to the real computer that actually hosts the Web site, but we do not have complete control over where our HTTP request actually ends up. If only one link in the chain of computers dealing with our HTTP request is broken, then an error such as 502 can easily occur.

Please contact us (email preferred) whenever you encounter 502 errors - there is nothing you can do to sort them out. We then have to liaise with your ISP and the vendor of the Web server software so that they can review the flow of IP data traffic between various computers under their control.