conn 정리시 널 체크

wshandler/wshandler.go

@@ -295,10 +295,20 @@ func (ws *WebsocketHandler) mainLoop(ctx context.Context) {
 		return room
 	}
 
+	shutdownConn := func(c *wsconn) {
+		defer func() {
+			r := recover()
+			if r != nil {
+				logger.Println(r)
+			}
+		}()
+		ws.ClientDisconnected(c)
+		c.Close()
+	}
+
 	defer func() {
 		for _, conn := range entireConns {
-			ws.ClientDisconnected(conn)
-			conn.Close()
+			shutdownConn(conn)
 		}
 	}()