}
@Test
public void testConcurrentModification() throws InterruptedException {
final ClusterDAO clusterDAO = injector.getInstance(ClusterDAO.class);
final AmbariJpaPersistService ambariJpaPersistService = injector.getInstance(AmbariJpaPersistService.class);
ClusterEntity clusterEntity = new ClusterEntity();
clusterEntity.setClusterName("cluster1");
clusterDAO.create(clusterEntity);
// assertFalse(ambariJpaPersistService.isWorking());