--- a/src/main/java/jp/ac/u_ryukyu/treevnc/TreeRFBProto.java	Sat Jan 31 16:01:14 2015 +0900
+++ b/src/main/java/jp/ac/u_ryukyu/treevnc/TreeRFBProto.java	Sun Feb 01 06:44:56 2015 +0900
@@ -146,6 +146,8 @@
                             }
                         }
                     } catch (InterruptedException e) {
+                        e.printStackTrace();
+                        System.out.println("timer thread interrupt.");
                     }
                 }
             }
@@ -168,15 +170,15 @@
                                 if (permitChangeScreen()) {
                                     ByteBuffer buf = ByteBuffer.wrap(b);
                                     buf.order(ByteOrder.BIG_ENDIAN);
-                                    buf.get();
+                                    buf.get(); // padding
                                     buf.get();
                                     short id = buf.getShort();
                                     int length = buf.getInt();
-                                    if (length == 0) 
-                                        continue;                                    
+                                    if (length == 0)
+                                        continue;
                                     byte[] byteAddress = new byte[length];
                                     buf.get(byteAddress);
-                                    String newHostName = new String(byteAddress, "UTF-8");                                    
+                                    String newHostName = new String(byteAddress, "UTF-8");
                                     int frameSizeWidth = buf.getInt();
                                     int frameSizeHeight = buf.getInt();
                                     System.out.println("Root server change request :" + newHostName);
@@ -215,13 +217,13 @@
                                 double halfDelay = (double) delay / 2;
                                 System.out.println(System.currentTimeMillis() + " : receive checkDelay : nodeNum" + nodeNum + ", port : " + port + ", address : " + address + ", delay : " + halfDelay);
                             }
-                        // case of client node.
+                            // case of client node.
                         } else if (b[0] == ClientToServerMessage.SERVER_CHANGE_REQUEST) {
                             ClientToServerMessage serverChangeRequest = new ClientToServerMessage() {
                                 @Override
                                 public void send(Writer writer)
                                         throws TransportException {
-                                    writer.write(b,0,c);
+                                    writer.write(b, 0, c);
                                 }
                             };
                             context.sendMessage(serverChangeRequest);
@@ -239,7 +241,7 @@
                                 @Override
                                 public void send(Writer writer)
                                         throws TransportException {
-                                    writer.write(b,0,c);
+                                    writer.write(b, 0, c);
                                 }
                             };
                             context.sendMessage(readyShareSound);
@@ -248,7 +250,7 @@
                                 @Override
                                 public void send(Writer writer)
                                         throws TransportException {
-                                    writer.write(b,0,c);
+                                    writer.write(b, 0, c);
                                 }
                             };
                             context.sendMessage(checkDelayReply);
@@ -265,6 +267,13 @@
                         }
                         return;
                     }
+
+                    /*
+                    // あとで検討
+                    } catch (TransportException e) {
+
+                    }
+                    */
                 }
             }
         };
@@ -470,10 +479,15 @@
     }	
 
 
-    public synchronized void waitForVNCConnection() throws InterruptedException {
+    public synchronized void waitForVNCConnection() {
         if (reconnectingId!=0) {
             while (!readyReconnect) {
-                wait();
+                try {
+                    wait();
+                } catch (InterruptedException e) {
+                    e.printStackTrace();
+                    System.out.println("interrupt wait for vnc connection.");
+                }
             }
         }
     }
@@ -747,10 +761,9 @@
      * @param height
      *            FrameHeight
      * @param id
-     * @throws InterruptedException
      */
     public void changeVNCServer(ViewerInterface vncProxyService, String hostName, int width, int height, short id)
-            throws UnknownHostException, IOException, InterruptedException {
+            throws IOException {
 
         this.frameSizeWidth = width;
         this.frameSizeHeight = height;