diff --git a/src/main/java/com/alterdekim/game/component/game/GameRoom.java b/src/main/java/com/alterdekim/game/component/game/GameRoom.java
index c7be517..7784e47 100644
--- a/src/main/java/com/alterdekim/game/component/game/GameRoom.java
+++ b/src/main/java/com/alterdekim/game/component/game/GameRoom.java
@@ -181,6 +181,7 @@ public class GameRoom extends Thread {
 
     public void sendMessage(Long userId, WebSocketMessageType type, Object o) {
         try {
+            log.info("GameRoom-sendMessage: parUserId={}; socksIds={}", userId, socks.keySet());
             if (socks.get(userId).isOpen())
                 socks.get(userId).sendMessage(
                         new TextMessage(