503 status code handling

The SMC API supports the 503 Service Unavailable status code. This response indicates that the server is currently unable to handle the request because it is running a system task that is accessing the same resource.

The implication is that this is a temporary condition and the request can be retried after some delay.

If the server returns the 503 Service Unavailable status code, the response header contains the Retry-After parameter and shows the amount of delay the server waits before sending the request again. The default delay is one second.