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Be back later definition code#

There are many reasons why a server might return a 503 error, but some common reasons are maintenance, a bug in the server's code, or a sudden spike in traffic that causes the server to become overwhelmed.

Be back later definition code#

What does the 503 error code mean?Īs mentioned above, 5xx status codes mean there's a problem with the server itself.Ī 503 Service Unavailable error means that the page or resource is unavailable. Now that you have a basic understanding of HTTP status codes, let's dig a bit deeper into the 503 Service Unavailable error. It's only when you get to the 4xx-5xx range that you might notice a status code because you'll see a page like this: A typical 503 error page – Source: Stack Overflow Most status codes go by totally unnoticed, which is fine because it means everything is working. For example, 301 means that a page or resource has moved permanently, while 302 means the move is temporary.Ĭheck out this page for a list of common HTTP status codes and their meaning: The last two digits of each HTTP status code represent a more specific status for each class.

5xx: Server error – there is an error with the server.

4xx: Client error – there is an error in the request from the browser or device.

3xx: Redirection – the page or resource has moved and server will respond with its new location.

2xx: Success – the request succeeded and the server responds with the page or resource.

1xx: Information – the server is still processing the request.

These status codes are organized into different classes, which is indicated by the first number of the status code: The server then uses a bunch of different status codes to communicate back.

Servers that host web pages listen for requests from web browsers or devices, also known as clients. In this article we'll go over HTTP status codes, what the 503 error means, and some possible ways to solve it – both for a site you're trying to visit and for your own site. If you've been online for any amount of time, no doubt you've seen the somewhat vague 503 Service Unavailable error. Errors happen – there's some unexpected maintenance, a bug that went unnoticed, or a page goes viral and the flood of connections take the server down.