code: @Test public void testServiceUpdateInvalidRequest() throws AmbariException {
    String clusterName1="foo1";
    createCluster(clusterName1);
    String clusterName2="foo2";
    createCluster(clusterName2);
    String serviceName1="HDFS";
    createService(clusterName1,serviceName1,null);
    String serviceName2="HBASE";
    String serviceName3="HBASE";
    try {
      createService(clusterName2,serviceName3,null);
      fail("Expected fail for invalid service for stack 0.1");
    }
   catch (  Exception e) {
    }
    clusters.getCluster(clusterName1).setDesiredStackVersion(new StackId("HDP-0.2"));
    clusters.getCluster(clusterName2).setDesiredStackVersion(new StackId("HDP-0.2"));
    createService(clusterName1,serviceName2,null);
    createService(clusterName2,serviceName3,null);
    Set<ServiceRequest> reqs=new HashSet<ServiceRequest>();
    ServiceRequest req1, req2;
    try {
      reqs.clear();
      req1=new ServiceRequest(clusterName1,serviceName1,null,State.INSTALLED.toString());
      req2=new ServiceRequest(clusterName2,serviceName2,null,State.INSTALLED.toString());
      reqs.add(req1);
      reqs.add(req2);
      controller.updateServices(reqs);
      fail("Expected failure for multi cluster update");
    }
   catch (  Exception e) {
    }
    try {
      reqs.clear();
      req1=new ServiceRequest(clusterName1,serviceName1,null,State.INSTALLED.toString());
      req2=new ServiceRequest(clusterName1,serviceName1,null,State.INSTALLED.toString());
      reqs.add(req1);
      reqs.add(req2);
      controller.updateServices(reqs);
      fail("Expected failure for dups services");
    }
   catch (  Exception e) {
    }
    clusters.getCluster(clusterName1).getService(serviceName2).setDesiredState(State.INSTALLED);
    try {
      reqs.clear();
      req1=new ServiceRequest(clusterName1,serviceName1,null,State.INSTALLED.toString());
      req2=new ServiceRequest(clusterName1,serviceName2,null,State.STARTED.toString());
      reqs.add(req1);
      reqs.add(req2);
      controller.updateServices(reqs);
      fail("Expected failure for different states");
    }
   catch (  Exception e) {
    }
  }
  