handle error

src/common/mainloop/interserver.rs

@@ -139,27 +139,32 @@ where
 }
 
 async fn interserver_send_loop<S>(server_id: ServerId,
-                            mut socket: async_std::net::TcpStream,
-                            output_loop_receiver: async_std::sync::Receiver<S>)
+                                  mut socket: async_std::net::TcpStream,
+                                  output_loop_receiver: async_std::sync::Receiver<S>)
 where
     S: Serialize + std::fmt::Debug + Send + 'static,
 {
     async_std::task::spawn(async move {
         loop {
             info!("login send loop");
-            let msg = output_loop_receiver.recv().await.unwrap();
-
-            let payload = serde_json::to_string(&msg);
-            if let Ok(payload) = payload {
-                let len_bytes = u32::to_le_bytes(payload.len() as u32);
+            match output_loop_receiver.recv().await {
+                Ok(msg) => {
+                    let payload = serde_json::to_string(&msg);
+                    if let Ok(payload) = payload {
+                        let len_bytes = u32::to_le_bytes(payload.len() as u32);
 
-                match socket.write_all(&len_bytes).await {
-                    Ok(_) => {},
-                    Err(err) => warn!("send failed: {:?}", err),
-                }
-                match socket.write_all(&payload.as_bytes()).await {
-                    Ok(_) => {},
-                    Err(err) => warn!("send failed: {:?}", err),
+                        match socket.write_all(&len_bytes).await {
+                            Ok(_) => {},
+                            Err(err) => warn!("send failed: {:?}", err),
+                        }
+                        match socket.write_all(&payload.as_bytes()).await {
+                            Ok(_) => {},
+                            Err(err) => warn!("send failed: {:?}", err),
+                        }
+                    }
+                },
+                Err(err) => {
+                    warn!("error in send_loop: {:?}, {:?}", server_id, err)
                 }
             }
         }