29th August 2018

fastly
13

What is Error 503 backend is unhealthy?

Error 503 backend is unhealthy. This error appears when custom health checks report a backend as down. It typically occurs when a Fastly edge server receives a client request and must make a request to your origin, but because the backend is considered unhealthy, Fastly doesn't try to send the request at all.

Consequently, what can cause a 503 error?

The Web server (running the Web site) is currently unable to handle the HTTP request due to a temporary overloading or maintenance of the server. The implication is that this is a temporary condition which will be alleviated after some delay.

What does a 503 error mean?

10.5.4 503 Service Unavailable. The server is currently unable to handle the request due to a temporary overloading or maintenance of the server. The implication is that this is a temporary condition which will be alleviated after some delay.

What is Error 503 on YouTube?

YouTube error 503 is a server-side response code that means the site's server is simply not available for now. It always occurs with the reminder of 503 Server Error: Service Unavailable. It can happen in any browser in any operating system, even on your smart phone, or on some applications.
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