503 is generally a bad gateway, which means it is trying to forward the request over a server (usually a load balancer) to the actual server but can't. This is usually because the servers have all crashed but can also be due to the servers being overloaded.
503 is generally a bad gateway, which means it is trying to forward the request over a server (usually a load balancer) to the actual server but can't. This is usually because the servers have all crashed but can also be due to the servers being overloaded.