503 Service Unavailable error
The server is up, but is telling you it cannot process the request right now — due to planned maintenance or being overloaded.
Common causes
- Scheduled maintenance, usually with a page explaining why.
- Traffic overload beyond the server's capacity.
- The application process crashed or is restarting.
- The hosting plan's concurrent-connection limit was exceeded.
What to do
- Wait a few minutes, especially if the page mentions maintenance.
- Check the service's social media to see if it is a known issue.
If you run the server
O que fazer com isso
If you run the server
Check whether scheduled maintenance is still running or should already be done.
O que fazer com isso
If you run the server
Monitor CPU and memory at the time of the error — it may be time to upgrade the plan or add caching.
Glossário: os termos desta página
HTTP status code
A 3-digit number the server sends with its response, saying whether it worked (2xx), was redirected (3xx), was a visitor-side error (4xx) or a server-side error (5xx).
Technology glossary — todos os 11 termos.