--- a/src/main/java/alice/topology/fix/FixTopology.java	Mon Dec 08 23:11:26 2014 +0900
+++ b/src/main/java/alice/topology/fix/FixTopology.java	Tue Dec 09 14:25:57 2014 +0900
@@ -8,6 +8,7 @@
 import alice.datasegment.CommandType;
 import alice.datasegment.Receiver;
 import alice.topology.HostMessage;
+import alice.topology.manager.Parent;
 import alice.topology.manager.ParentManager;
 
 public class FixTopology extends CodeSegment {
@@ -65,10 +66,7 @@
             }
 
             if (!lastJoinNodeName.equals(lostNodeName)) {
-
-                if (lostNodeName.equals(parentNode.remoteAbsName)) {
-
-                } else {
+                if (!lostNodeName.equals(parentNode.remoteAbsName)) {
                     // send close message to lastJoinedNode
                     ods.put(lastJoinNodeName, "_CLOSEMESSEAGE", parentNode.reverseName);
                     // send close message to lastJoinedNode's parent
@@ -103,29 +101,34 @@
                                 break;
                             }
                         }
+
                     }
                 }
                 disconnectionList.clear();
                 manager.replaceAndRemove(lostNodeName, lastJoinNodeName);
             } else {
                 // disconnection node is lastJoinedNode
+                Parent p =  manager.find(parentNode.absName);
+                p.decrement();
                 manager.remove(lostNodeName);
             }
+
+            // need debug option
+            for (LinkedList<HostMessage> list :topology.values()){
+                if (list.size() !=0) {
+                    System.out.print(list.get(0).remoteAbsName+" : ");
+                    for (HostMessage host : list){
+                        System.out.print("[ "+host.absName+" "+host.name+" "+host.port+" "+host.connectionName+" "+host.reverseName+" "+host.remoteAbsName+" ]");
+                    }
+                    System.out.println();
+                }
+            }
+
+            manager.show();
         } else {
             // disconnect message already received.
         }
 
-        // need debug option
-        for (LinkedList<HostMessage> list :topology.values()){
-            if (list.size() !=0) {
-                System.out.print(list.get(0).remoteAbsName+" : ");
-                for (HostMessage host : list){
-                    System.out.print("[ "+host.absName+" "+host.name+" "+host.port+" "+host.connectionName+" "+host.reverseName+" "+host.remoteAbsName+" ]");
-                }
-                System.out.println();
-            }
-        }
-
         ods.put(info1.key, topology);
         ods.put(info2.key, info2.getReceiveData());
         ods.put(info3.key, nameTable);

--- a/src/main/java/alice/topology/manager/ParentManager.java	Mon Dec 08 23:11:26 2014 +0900
+++ b/src/main/java/alice/topology/manager/ParentManager.java	Tue Dec 09 14:25:57 2014 +0900
@@ -54,11 +54,7 @@
         list.remove(removeNode);
     }
 
-    public void decrementChild(String name) {
-        list.get(position).decrement();
-    }
-
-    private Parent find(String name) {
+    public Parent find(String name) {
         boolean found = false;
         int i = 0;
         for (;i<list.size();i++) {
@@ -73,4 +69,14 @@
             return null;
         }
     }
+
+    public void show() {
+        int counter = 0;
+        System.out.print("| ");
+        for (Parent p :list) {
+            if (counter==position)
+                System.out.print("P ");
+            System.out.print(p.getName()+" "+p.children()+" | ");
+        }
+    }
 }

--- a/src/main/java/alice/topology/manager/keeparive/ListManager.java	Mon Dec 08 23:11:26 2014 +0900
+++ b/src/main/java/alice/topology/manager/keeparive/ListManager.java	Tue Dec 09 14:25:57 2014 +0900
@@ -85,10 +85,13 @@
     }
 
     public void deleteAll(String name) {
-        if (TaskExecuter.getInstance().getNowTask().getManagerKey() != null &&
-                TaskExecuter.getInstance().getNowTask().getManagerKey().equals(name))
-            TaskExecuter.getInstance().skip();
-        TaskInfo task = new TaskInfo(TaskType.CLOSE);
+        TaskInfo task = TaskExecuter.getInstance().getNowTask();
+        if (task!= null) {
+            if (task.getManagerKey() != null && task.getManagerKey().equals(name)) {
+                TaskExecuter.getInstance().skip();
+            }
+        }
+        task = new TaskInfo(TaskType.CLOSE);
         task.setInfo(name, 0);
         while(deleteTask(task));
         task = new TaskInfo(TaskType.PING);

--- a/src/main/java/alice/topology/manager/keeparive/TaskExecuter.java	Mon Dec 08 23:11:26 2014 +0900
+++ b/src/main/java/alice/topology/manager/keeparive/TaskExecuter.java	Tue Dec 09 14:25:57 2014 +0900
@@ -120,7 +120,7 @@
         }
     }
 
-    public boolean compareNowTask(TaskInfo task) {
+    public synchronized boolean compareNowTask(TaskInfo task) {
         if (nowTask != null){
             if (nowTask.getType().equals(task.getType())
                     && nowTask.getManagerKey().equals(task.getManagerKey())){