  @Test
  public void testRaftNode() throws Exception{

    Thread.sleep(10000);
    cluster.printNodesState();
    
    for(int i =0; i< 100; i++) { 
      for(RaftNode n :nodes)
      n.testHearBeat();
      
    }
    cluster.printNodesState();
    Thread.sleep(10000);
    cluster.printNodesState();
  }