Discarding a Radius UDP backend datagram because its reverse-request validation queue is full

Logged when a reverse RADIUS UDP request arrives while the connection validation queue is full. Fields show the queued request count and queue limit. Radiator discards the datagram because RADIUS/1.0 cannot receive an authenticated response yet.

The backend is producing reverse requests faster than Radiator can select clients and validate them. Check reverse-request rates and @pre-client errors or latency before changing capacity.

Review the backend connection window, which bounds queued reverse-request validation on each connection, only when the load is expected.