WIP: try to fix halt channel closed after starting UDP tracker

cSpell.json

@@ -32,6 +32,7 @@
         "Containerfile",
         "curr",
         "Cyberneering",
+        "datagram",
         "datetime",
         "Dijke",
         "distroless",
@@ -79,6 +80,7 @@
         "nonroot",
         "Norberg",
         "numwant",
+        "nvCFlJCq7fz7Qx6KoKTDiMZvns8l5Kw7",
         "oneshot",
         "ostr",
         "Pando",
@@ -129,8 +131,7 @@
         "Xtorrent",
         "Xunlei",
         "xxxxxxxxxxxxxxxxxxxxd",
-        "yyyyyyyyyyyyyyyyyyyyd",
-        "nvCFlJCq7fz7Qx6KoKTDiMZvns8l5Kw7"
+        "yyyyyyyyyyyyyyyyyyyyd"
     ],
     "enableFiletypes": [
         "dockerfile",

src/bootstrap/jobs/udp_tracker.rs

@@ -8,6 +8,7 @@
 //! for the configuration options.
 use std::sync::Arc;
 
+use log::debug;
 use tokio::task::JoinHandle;
 use torrust_tracker_configuration::UdpTracker;
 
@@ -36,6 +37,13 @@
         .expect("it should be able to start the udp tracker");
 
     tokio::spawn(async move {
+        debug!(target: "UDP Tracker", "Wait for launcher (UDP service) to finish ...");
+
+        assert!(
+            !server.state.halt_task.is_closed(),
+            "Halt channel for UDP tracker should be open"
+        );
+
         server
             .state
             .task

src/servers/http/server.rs

@@ -48,7 +48,7 @@ impl Launcher {
         tokio::task::spawn(graceful_shutdown(
             handle.clone(),
             rx_halt,
-            format!("Shutting down http server on socket address: {address}"),
+            format!("Shutting down HTTP server on socket address: {address}"),
         ));
 
         let tls = self.tls.clone();

src/servers/udp/server.rs

@@ -120,10 +120,19 @@
         let (tx_start, rx_start) = tokio::sync::oneshot::channel::<Started>();
         let (tx_halt, rx_halt) = tokio::sync::oneshot::channel::<Halted>();
 
+        assert!(!tx_halt.is_closed(), "Halt channel for UDP tracker should be open");
+
         let launcher = self.state.launcher;
 
         let task = tokio::spawn(async move {
-            launcher.start(tracker, tx_start, rx_halt).await;
+            debug!(target: "UDP Tracker", "Launcher starting ...");
+
+            let server = launcher.start(tracker, tx_start, rx_halt);
+
+            server.await;
+
+            debug!(target: "UDP Tracker", "Launcher finished ...");
+
             launcher
         });
 
@@ -135,8 +144,6 @@
             },
         };
 
-        info!("Running UDP Tracker on Socket: {}", running_udp_server.state.binding);
-
         Ok(running_udp_server)
     }
 }
@@ -202,38 +209,59 @@
         tx_start: Sender<Started>,
         rx_halt: Receiver<Halted>,
     ) -> JoinHandle<()> {
-        let binding = Arc::new(UdpSocket::bind(bind_to).await.expect("Could not bind to {self.socket}."));
-        let address = binding.local_addr().expect("Could not get local_addr from {binding}.");
+        let socket = Arc::new(UdpSocket::bind(bind_to).await.expect("Could not bind to {self.socket}."));
+        let address = socket.local_addr().expect("Could not get local_addr from {binding}.");
 
-        let running = tokio::task::spawn(async move {
-            let halt = async move {
-                shutdown_signal_with_message(rx_halt, format!("Halting Http Service Bound to Socket: {address}")).await;
-            };
+        let halt = tokio::task::spawn(async move {
+            debug!(target: "UDP Tracker", "Server on socket address: udp://{address} waiting for halt signal ...");
 
-            pin_mut!(halt);
+            shutdown_signal_with_message(
+                rx_halt,
+                format!("Shutting down UDP server on socket address: udp://{address}"),
+            )
+            .await;
+        });
+
+        info!(target: "UDP Tracker", "Starting on: udp://{}", address);
 
-            loop {
-                let mut data = [0; MAX_PACKET_SIZE];
-                let binding = binding.clone();
+        let running = tokio::task::spawn(async move {
+            let listen = async move {
+                debug!(target: "UDP Tracker", "Waiting for packets ...");
 
-                tokio::select! {
-                    () = & mut halt => {},
+                loop {
+                    let mut data = [0; MAX_PACKET_SIZE];
+                    let socket_clone = socket.clone();
 
-                    Ok((valid_bytes, remote_addr)) = binding.recv_from(&mut data) => {
-                        let payload = data[..valid_bytes].to_vec();
+                    match socket_clone.recv_from(&mut data).await {
+                        Ok((valid_bytes, remote_addr)) => {
+                            let payload = data[..valid_bytes].to_vec();
 
-                        debug!("Received {} bytes", payload.len());
-                        debug!("From: {}", &remote_addr);
-                        debug!("Payload: {:?}", payload);
+                            debug!(target: "UDP Tracker", "Received {} bytes", payload.len());
+                            debug!(target: "UDP Tracker", "From: {}", &remote_addr);
+                            debug!(target: "UDP Tracker", "Payload: {:?}", payload);
 
-                        let response = handle_packet(remote_addr, payload, &tracker).await;
+                            let response = handle_packet(remote_addr, payload, &tracker).await;
 
-                        Udp::send_response(binding, remote_addr, response).await;
+                            Udp::send_response(socket_clone, remote_addr, response).await;
+                        }
+                        Err(err) => {
+                            error!("Error reading UDP datagram from socket. Error: {:?}", err);
+                        }
                     }
                 }
+            };
+
+            pin_mut!(halt);
+            pin_mut!(listen);
+
+            tokio::select! {
+                _ = & mut halt => { debug!(target: "UDP Tracker", "Halt signal spawned task stopped on address: udp://{address}"); },
+                () = & mut listen => { debug!(target: "UDP Tracker", "Socket listener stopped on address: udp://{address}"); },
             }
         });
 
+        info!(target: "UDP Tracker", "Started on: udp://{}", address);
+
         tx_start
             .send(Started { address })
             .expect("the UDP Tracker service should not be dropped");