diff --git a/src/main/java/org/edgegallery/website/sessionmgr/WebSocketSessionServer.java b/src/main/java/org/edgegallery/website/sessionmgr/WebSocketSessionServer.java
index 7962d1a14b9ed8b25c43a2c24dfd1266d9321232..3b95e4b157505791a6196ee3525b2996543dfef2 100644
--- a/src/main/java/org/edgegallery/website/sessionmgr/WebSocketSessionServer.java
+++ b/src/main/java/org/edgegallery/website/sessionmgr/WebSocketSessionServer.java
@@ -59,7 +59,8 @@ public class WebSocketSessionServer {
             LOGGER.warn("invalid http session id.");
             return;
         }
-
+        LOGGER.info("websocket wsSession: {}", wsSession);
+        LOGGER.info("websocket httpSessionId: {}", httpSessionId);
         LOGGER.debug("ws client opened.");
         synchronized (LOCK_OBJ) {
             List<Session> wsSessList = WS_SESSION_FINDER.get(httpSessionId);
@@ -81,11 +82,16 @@ public class WebSocketSessionServer {
      */
     @OnMessage
     public void onMessage(String message, Session wsSession) {
-        LOGGER.debug("receive message from ws client");
+        LOGGER.info("receive message from ws client, {}", wsSession);
         synchronized (LOCK_OBJ) {
             String httpSessId = HTTP_SESSIONID_FINDER.get(wsSession.getId());
             HttpSession httpSession = CustomHttpSessionManager.getInstance().getSession(httpSessId);
+            LOGGER.info("httpSession info is: {}", httpSession);
             if (httpSession != null) {
+                LOGGER.info("httpSession info the start time is: {}",
+                    (System.currentTimeMillis() - httpSession.getLastAccessedTime()) / 1000);
+                LOGGER.info("httpSession info the end time is: {}",
+                    Consts.HTTP_SESSION_TIMEOUT - Consts.ADV_NOTIFY_TIME_FOR_HTTP_SESSION_TIMEOUT);
                 if ((System.currentTimeMillis() - httpSession.getLastAccessedTime()) / 1000
                     > Consts.HTTP_SESSION_TIMEOUT - Consts.ADV_NOTIFY_TIME_FOR_HTTP_SESSION_TIMEOUT) {
                     notifyHttpSessionInvalid(httpSessId, Consts.HttpSessionInvalidScene.TIMEOUT);