Program: 4000
Project: 4000
Buggy source:
private boolean testConnectPair() throws Exception {
  WebSocketServer.Options wssopt=new WebSocketServer.Options();
  wssopt.port=6668;
  wssopt.path="String_Node_Str";
  WebSocketServer wss=new WebSocketServer(ctx,wssopt,new WebSocketServer.ListeningCallback(){
    @Override public void onListening() throws Exception {
      Log.d(TAG,"String_Node_Str");
      final WebSocket ws=new WebSocket(ctx,"String_Node_Str",null,new WebSocket.Options());
      ws.onmessage(new onmessageListener(){
        @Override public void onMessage(        MessageEvent event) throws Exception {
          Log.d(TAG,"String_Node_Str" + event.toString());
          if (event.isBinary()) {
            Log.d(TAG,"String_Node_Str" + event.getData().toString());
          }
 else {
            Log.d(TAG,"String_Node_Str" + (String)(event.getData()));
          }
        }
      }
);
      ws.onopen(new onopenListener(){
        @Override public void onOpen(        OpenEvent event) throws Exception {
          ws.send("String_Node_Str",new WebSocket.SendOptions(false,true),null);
          ctx.setInterval(new IntervalListener(){
            @Override public void onInterval() throws Exception {
              ws.send("String_Node_Str" + new Date(),new WebSocket.SendOptions(false,true),null);
            }
          }
,3000);
        }
      }
);
    }
  }
);
  wss.onconnection(new WebSocketServer.onconnectionListener(){
    @Override public void onConnection(    final WebSocket socket) throws Exception {
      Log.d(TAG,"String_Node_Str" + socket);
      socket.onmessage(new WebSocket.onmessageListener(){
        @Override public void onMessage(        MessageEvent event) throws Exception {
          Log.d(TAG,"String_Node_Str" + event.toString());
          if (event.isBinary()) {
            Log.d(TAG,"String_Node_Str" + event.getData().toString());
          }
 else {
            Log.d(TAG,"String_Node_Str" + (String)(event.getData()));
            socket.send(event.getData().toString() + "String_Node_Str",new WebSocket.SendOptions(false,true),null);
          }
        }
      }
);
      socket.send("String_Node_Str",new WebSocket.SendOptions(false,true),null);
    }
  }
);
  return true;
}

Fixed version (ground truth):
private boolean testConnectPair() throws Exception {
  WebSocketServer.Options wssopt=new WebSocketServer.Options();
  wssopt.port=6668;
  wssopt.path="String_Node_Str";
  WebSocketServer wss=new WebSocketServer(ctx,wssopt,new WebSocketServer.ListeningCallback(){
    @Override public void onListening() throws Exception {
      Log.d(TAG,"String_Node_Str");
      final WebSocket ws=new WebSocket(ctx,"String_Node_Str",null,new WebSocket.Options());
      ws.onmessage(new onmessageListener(){
        @Override public void onMessage(        MessageEvent event) throws Exception {
          Log.d(TAG,"String_Node_Str" + event.toString());
          if (event.isBinary()) {
            Log.d(TAG,"String_Node_Str" + event.getData().toString());
          }
 else {
            Log.d(TAG,"String_Node_Str" + (String)(event.getData()));
          }
        }
      }
);
      ws.onerror(new WebSocket.onerrorListener(){
        @Override public void onError(        ErrorEvent event) throws Exception {
          Log.d(TAG,"String_Node_Str" + event.getCode() + "String_Node_Str"+ event.getError());
        }
      }
);
      ws.onopen(new onopenListener(){
        @Override public void onOpen(        OpenEvent event) throws Exception {
          ws.send("String_Node_Str",new WebSocket.SendOptions(false,false),null);
          ctx.setInterval(new IntervalListener(){
            @Override public void onInterval() throws Exception {
              ws.send("String_Node_Str" + new Date(),new WebSocket.SendOptions(false,true),null);
            }
          }
,3000);
        }
      }
);
    }
  }
);
  wss.onconnection(new WebSocketServer.onconnectionListener(){
    @Override public void onConnection(    final WebSocket socket) throws Exception {
      Log.d(TAG,"String_Node_Str" + socket);
      socket.onmessage(new WebSocket.onmessageListener(){
        @Override public void onMessage(        MessageEvent event) throws Exception {
          Log.d(TAG,"String_Node_Str" + event.toString());
          if (event.isBinary()) {
            Log.d(TAG,"String_Node_Str" + event.getData().toString());
          }
 else {
            Log.d(TAG,"String_Node_Str" + (String)(event.getData()));
            socket.send(event.getData().toString() + "String_Node_Str",new WebSocket.SendOptions(false,false),null);
          }
        }
      }
);
      socket.send("String_Node_Str",new WebSocket.SendOptions(false,false),null);
    }
  }
);
  return true;
}