--- a/src/alice/daemon/IncomingTcpConnection.java	Fri Oct 18 02:43:21 2013 +0900
+++ b/src/alice/daemon/IncomingTcpConnection.java	Fri Oct 18 02:55:37 2013 +0900
@@ -33,11 +33,9 @@
 	 * pipeline thread for receiving
 	 */
 	public void run() {
-		Unpacker unpacker = null;
-		try {
-			unpacker = SingletonMessage.getInstance().createUnpacker(connection.socket.getInputStream());
-		} catch (IOException e2) {
-			e2.printStackTrace();
+		Unpacker unpacker = this.getUnpacker();
+		if (unpacker == null) {
+			return;
 		}
 		while (true) {
 			try {
@@ -79,6 +77,17 @@
 			}
 		}
 	}
+
+	private Unpacker getUnpacker() {
+		Unpacker unpacker = null;
+		try {
+			unpacker = SingletonMessage.getInstance().createUnpacker(connection.socket.getInputStream());
+		} catch (IOException e2) {
+			e2.printStackTrace();
+		}
+		return unpacker;
+	}
+
 	private DataSegmentKey getDataSegmentKey(CommandMessage msg) {
 		return lmanager.getDataSegmentKey(msg.key);
 	}