diff --git a/server/masterserver/gsmgr.cc b/server/masterserver/gsmgr.cc
index c06ede8..d668690 100644
--- a/server/masterserver/gsmgr.cc
+++ b/server/masterserver/gsmgr.cc
@@ -26,6 +26,20 @@ struct GSNode
     bool servicing = false;
     int version = 0;
     f8::TimerWp timer_wp;
+
+    std::string ToJson()
+    {
+        auto node = a8::MutableXObject::CreateObject();
+        node->SetVal("node_id", node_id);
+        node->SetVal("instance_id", instance_id);
+        node->SetVal("room_num", room_num);
+        node->SetVal("online_num", online_num);
+        node->SetVal("ip", ip);
+        node->SetVal("port", port);
+        node->SetVal("servicing", servicing);
+        node->SetVal("version", version);
+        return node->ToJsonStr();
+    }
 };
 
 void GSMgr::Init()
@@ -154,6 +168,7 @@ void GSMgr::___GSReport(std::shared_ptr<f8::JsonHttpRequest> request)
                      }
                      node_key_hash_.erase(gs->key);
                      RearrangeNode();
+                     f8::Timer::Instance()->DeleteCurrentTimer();
                  }
              });
         node_key_hash_[key] = gs;
@@ -307,6 +322,9 @@ void GSMgr::RearrangeNode()
 
 void GSMgr::AddNodeToSortedNodes(std::shared_ptr<GSNode> node)
 {
+    #ifdef DEBUG
+    a8::XPrintf("AddNodeToSortedNodes %s\n" , {node->ToJson()});
+    #endif
     auto itr = sorted_node_hash_.find(node->version);
     if (itr != sorted_node_hash_.end()) {
         itr->second.push_back(node);
@@ -317,11 +335,17 @@ void GSMgr::AddNodeToSortedNodes(std::shared_ptr<GSNode> node)
 
 void GSMgr::RemoveNodeFromSortedNodes(std::shared_ptr<GSNode> node)
 {
+    #ifdef DEBUG
+    a8::XPrintf("RemoveNodeFromSortedNodes %s\n" , {node->ToJson()});
+    #endif
     for (auto& pair : sorted_node_hash_) {
         std::vector<std::shared_ptr<GSNode>>& node_list = pair.second;
         for (size_t i = 0; i < node_list.size(); ++i) {
             if (node_list[i] == node) {
                 node_list.erase(node_list.begin() + i);
+#ifdef DEBUG
+                a8::XPrintf("RemoveNodeFromSortedNodes ok %s\n" , {node->ToJson()});
+#endif
                 break;
             }
         }