AMBARI-7822. Events with Service Checks results in Exceptions in log.

ambari-server/src/main/java/org/apache/ambari/server/controller/AmbariManagementControllerImpl.java

@@ -1979,7 +1979,9 @@ public class AmbariManagementControllerImpl implements AmbariManagementControlle
       for (String serviceName : smokeTestServices) { // Creates smoke test commands
         Service s = cluster.getService(serviceName);
         // find service component host
-        String clientHost = getClientHostForRunningAction(cluster, s);
+        ServiceComponent component = getClientComponentForRunningAction(cluster, s);
+        String componentName = component.getName();
+        String clientHost = getClientHostForRunningAction(cluster, s, component);
         String smokeTestRole =
             actionMetadata.getServiceCheckAction(serviceName);
 
@@ -1995,7 +1997,7 @@ public class AmbariManagementControllerImpl implements AmbariManagementControlle
 
         customCommandExecutionHelper.addServiceCheckAction(stage, clientHost,
           smokeTestRole, nowTimestamp, serviceName,
-          null, null);
+          componentName, null);
       }
 
       RoleCommandOrder rco = getRoleCommandOrder(cluster);
@@ -2880,7 +2882,17 @@ public class AmbariManagementControllerImpl implements AmbariManagementControlle
     }
   }
 
-  private String getClientHostForRunningAction(Cluster cluster,
+  protected String getClientHostForRunningAction(Cluster cluster, Service service, ServiceComponent serviceComponent)
+      throws AmbariException {
+    if (serviceComponent != null && !serviceComponent.getServiceComponentHosts().isEmpty()) {
+      Set<String> candidateHosts = serviceComponent.getServiceComponentHosts().keySet();
+      filterHostsForAction(candidateHosts, service, cluster, Resource.Type.Cluster);
+      return getHealthyHost(candidateHosts);
+    }
+    return null;
+  }
+
+  protected ServiceComponent getClientComponentForRunningAction(Cluster cluster,
       Service service) throws AmbariException {
     /*
      * We assume Cluster level here. That means that we never run service
@@ -2888,7 +2900,6 @@ public class AmbariManagementControllerImpl implements AmbariManagementControlle
      * That also means that we can not run service check if the only host
      * that has client component is in maintenance state
      */
-    Resource.Type opLvl = Resource.Type.Cluster;
 
     StackId stackId = service.getDesiredStackVersion();
     ComponentInfo compInfo =
@@ -2896,13 +2907,7 @@ public class AmbariManagementControllerImpl implements AmbariManagementControlle
             stackId.getStackVersion(), service.getName()).getClientComponent();
     if (compInfo != null) {
       try {
-        ServiceComponent serviceComponent =
-            service.getServiceComponent(compInfo.getName());
-        if (!serviceComponent.getServiceComponentHosts().isEmpty()) {
-          Set<String> candidateHosts = serviceComponent.getServiceComponentHosts().keySet();
-          filterHostsForAction(candidateHosts, service, cluster, opLvl);
-          return getHealthyHost(candidateHosts);
-        }
+        return service.getServiceComponent(compInfo.getName());
       } catch (ServiceComponentNotFoundException e) {
         LOG.warn("Could not find required component to run action"
             + ", clusterName=" + cluster.getClusterName()
@@ -2913,17 +2918,12 @@ public class AmbariManagementControllerImpl implements AmbariManagementControlle
 
     // any component will do
     Map<String, ServiceComponent> components = service.getServiceComponents();
-    if (components.isEmpty()) {
-      return null;
-    }
-
-    for (ServiceComponent serviceComponent : components.values()) {
-      if (serviceComponent.getServiceComponentHosts().isEmpty()) {
-        continue;
+    if (!components.isEmpty()) {
+      for (ServiceComponent serviceComponent : components.values()) {
+        if (!serviceComponent.getServiceComponentHosts().isEmpty()) {
+          return serviceComponent;
+        }
       }
-      Set<String> candidateHosts = serviceComponent.getServiceComponentHosts().keySet();
-      filterHostsForAction(candidateHosts, service, cluster, opLvl);
-      return getHealthyHost(candidateHosts);
     }
     return null;
   }
@@ -2932,7 +2932,7 @@ public class AmbariManagementControllerImpl implements AmbariManagementControlle
    * Utility method that filters out hosts from set based on their maintenance
    * state status.
    */
-  private void filterHostsForAction(Set<String> candidateHosts, Service service,
+  protected void filterHostsForAction(Set<String> candidateHosts, Service service,
                                     final Cluster cluster,
                                     final Resource.Type level)
                                     throws AmbariException {

ambari-server/src/test/java/org/apache/ambari/server/controller/AmbariManagementControllerImplTest.java

@@ -36,6 +36,7 @@ import org.apache.ambari.server.actionmanager.ActionDBAccessorImpl;
 import org.apache.ambari.server.actionmanager.ActionManager;
 import org.apache.ambari.server.api.services.AmbariMetaInfo;
 import org.apache.ambari.server.configuration.Configuration;
+import org.apache.ambari.server.controller.spi.Resource;
 import org.apache.ambari.server.orm.InMemoryDefaultTestModule;
 import org.apache.ambari.server.orm.entities.LdapSyncSpecEntity;
 import org.apache.ambari.server.security.authorization.Users;
@@ -43,11 +44,13 @@ import org.apache.ambari.server.security.ldap.AmbariLdapDataPopulator;
 import org.apache.ambari.server.security.ldap.LdapBatchDto;
 import org.apache.ambari.server.state.Cluster;
 import org.apache.ambari.server.state.Clusters;
+import org.apache.ambari.server.state.ComponentInfo;
 import org.apache.ambari.server.state.Host;
 import org.apache.ambari.server.state.MaintenanceState;
 import org.apache.ambari.server.state.Service;
 import org.apache.ambari.server.state.ServiceComponent;
 import org.apache.ambari.server.state.ServiceComponentHost;
+import org.apache.ambari.server.state.ServiceComponentImpl;
 import org.apache.ambari.server.state.ServiceInfo;
 import org.apache.ambari.server.state.ServiceOsSpecific;
 import org.apache.ambari.server.state.StackId;
@@ -83,6 +86,8 @@ import static org.easymock.EasyMock.replay;
 import static org.easymock.EasyMock.reset;
 import static org.easymock.EasyMock.verify;
 import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertNull;
 import static org.junit.Assert.assertSame;
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
@@ -175,7 +180,6 @@ public class AmbariManagementControllerImplTest {
     // member state mocks
     Injector injector = createStrictMock(Injector.class);
     Capture<AmbariManagementController> controllerCapture = new Capture<AmbariManagementController>();
-    Clusters clusters = createNiceMock(Clusters.class);
 
     ClusterRequest request1 = new ClusterRequest(null, "cluster1", "1", Collections.<String>emptySet());
     Cluster cluster = createNiceMock(Cluster.class);
@@ -208,6 +212,181 @@ public class AmbariManagementControllerImplTest {
     verify(injector, clusters, cluster, response);
   }
 
+  @Test
+  public void testGetClientHostForRunningAction_componentIsNull() throws Exception {
+    Injector injector = createNiceMock(Injector.class);
+
+    Cluster cluster = createNiceMock(Cluster.class);
+    Service service = createNiceMock(Service.class);
+    ServiceComponent component = null;
+
+    replay(cluster, service, injector);
+
+    AmbariManagementControllerImpl controller = new AmbariManagementControllerImpl(null, clusters, injector);
+    String host = controller.getClientHostForRunningAction(cluster, service, component);
+
+    assertNull(host);
+    verify(cluster, service, injector);
+  }
+
+  @Test
+  public void testGetClientHostForRunningAction_componentMapIsEmpty() throws Exception {
+    Injector injector = createNiceMock(Injector.class);
+
+    Cluster cluster = createNiceMock(Cluster.class);
+    Service service = createNiceMock(Service.class);
+    ServiceComponent component = createNiceMock(ServiceComponent.class);
+    Map<String, ServiceComponentHost> hostMap = new HashMap<String, ServiceComponentHost>();
+    expect(component.getServiceComponentHosts()).andReturn(hostMap);
+
+    replay(cluster, service, component, injector);
+
+    AmbariManagementControllerImpl controller = new AmbariManagementControllerImpl(null, clusters, injector);
+    String host = controller.getClientHostForRunningAction(cluster, service, component);
+
+    verify(cluster, service, component, injector);
+    assertNull(host);
+  }
+
+  @Test
+  public void testGetClientHostForRunningAction_returnsHelathyHost() throws Exception {
+    Injector injector = createNiceMock(Injector.class);
+    ActionManager actionManager = createNiceMock(ActionManager.class);
+
+    Cluster cluster = createNiceMock(Cluster.class);
+    Service service = createNiceMock(Service.class);
+    ServiceComponent component = createNiceMock(ServiceComponent.class);
+    Map<String, ServiceComponentHost> hostMap = createNiceMock(Map.class);
+    Set<String> hostsSet = createNiceMock(Set.class);
+    expect(hostMap.isEmpty()).andReturn(false);
+    expect(hostMap.keySet()).andReturn(hostsSet);
+    expect(component.getServiceComponentHosts()).andReturn(hostMap).times(2);
+
+    replay(cluster, service, component, injector, actionManager, hostMap, hostsSet);
+
+    AmbariManagementControllerImpl controller = createMockBuilder(AmbariManagementControllerImpl.class)
+        .addMockedMethod("filterHostsForAction")
+        .addMockedMethod("getHealthyHost")
+        .withConstructor(actionManager, clusters, injector)
+        .createMock();
+    expect(controller.getHealthyHost(hostsSet)).andReturn("healthy_host");
+    controller.filterHostsForAction(hostsSet, service, cluster, Resource.Type.Cluster);
+    expectLastCall().once();
+
+    replay(controller);
+    String host = controller.getClientHostForRunningAction(cluster, service, component);
+
+    assertEquals("healthy_host", host);
+    verify(controller, cluster, service, component, injector, hostMap);
+  }
+
+  @Test
+  public void testGetClientHostForRunningAction_clientComponent() throws Exception {
+    Injector injector = createNiceMock(Injector.class);
+    Cluster cluster = createNiceMock(Cluster.class);
+    Service service = createNiceMock(Service.class);
+    StackId stackId = createNiceMock(StackId.class);
+    ServiceComponent component = createNiceMock(ServiceComponent.class);
+
+    expect(service.getName()).andReturn("service");
+    expect(service.getServiceComponent("component")).andReturn(component);
+    expect(service.getDesiredStackVersion()).andReturn(stackId);
+    expect(stackId.getStackName()).andReturn("stack");
+    expect(stackId.getStackVersion()).andReturn("1.0");
+
+    ServiceInfo serviceInfo = createNiceMock(ServiceInfo.class);
+    ComponentInfo compInfo = createNiceMock(ComponentInfo.class);
+    expect(serviceInfo.getClientComponent()).andReturn(compInfo);
+    expect(compInfo.getName()).andReturn("component");
+    expect(ambariMetaInfo.getServiceInfo("stack", "1.0", "service")).andReturn(serviceInfo);
+
+    replay(injector, cluster, service, component, serviceInfo, compInfo, ambariMetaInfo, stackId);
+
+    AmbariManagementControllerImpl controller = new AmbariManagementControllerImpl(null, clusters, injector);
+    setAmbariMetaInfo(ambariMetaInfo, controller);
+    ServiceComponent resultComponent = controller.getClientComponentForRunningAction(cluster, service);
+
+    assertNotNull(resultComponent);
+    assertEquals(component, resultComponent);
+    verify(injector, cluster, service, component, serviceInfo, compInfo, ambariMetaInfo, stackId);
+  }
+
+  @Test
+  public void testGetClientHostForRunningAction_clientComponentThrowsException() throws Exception {
+    Injector injector = createNiceMock(Injector.class);
+    Cluster cluster = createNiceMock(Cluster.class);
+    Service service = createNiceMock(Service.class);
+    StackId stackId = createNiceMock(StackId.class);
+    ServiceComponent component1 = createNiceMock(ServiceComponent.class);
+    ServiceComponent component2 = createNiceMock(ServiceComponent.class);
+
+    expect(service.getName()).andReturn("service");
+    expect(service.getServiceComponent("component")).andThrow(
+        new ServiceComponentNotFoundException("cluster", "service", "component"));
+    expect(service.getDesiredStackVersion()).andReturn(stackId);
+    expect(stackId.getStackName()).andReturn("stack");
+    expect(stackId.getStackVersion()).andReturn("1.0");
+    Map<String, ServiceComponent> componentsMap = new HashMap<String, ServiceComponent>();
+    componentsMap.put("component1", component1);
+    componentsMap.put("component2", component2);
+    expect(service.getServiceComponents()).andReturn(componentsMap);
+    expect(component1.getServiceComponentHosts()).andReturn(Collections.EMPTY_MAP);
+    expect(component2.getServiceComponentHosts()).andReturn(
+        Collections.<String, ServiceComponentHost>singletonMap("anyHost", null));
+
+    ServiceInfo serviceInfo = createNiceMock(ServiceInfo.class);
+    ComponentInfo compInfo = createNiceMock(ComponentInfo.class);
+    expect(serviceInfo.getClientComponent()).andReturn(compInfo);
+    expect(compInfo.getName()).andReturn("component");
+    expect(ambariMetaInfo.getServiceInfo("stack", "1.0", "service")).andReturn(serviceInfo);
+
+    replay(injector, cluster, service, component1, component2, serviceInfo, compInfo, ambariMetaInfo, stackId);
+
+    AmbariManagementControllerImpl controller = new AmbariManagementControllerImpl(null, clusters, injector);
+    setAmbariMetaInfo(ambariMetaInfo, controller);
+    ServiceComponent resultComponent = controller.getClientComponentForRunningAction(cluster, service);
+
+    assertNotNull(resultComponent);
+    assertEquals(component2, resultComponent);
+    verify(injector, cluster, service, component1, component2, serviceInfo, compInfo, ambariMetaInfo, stackId);
+  }
+
+  @Test
+  public void testGetClientHostForRunningAction_noClientComponent() throws Exception {
+    Injector injector = createNiceMock(Injector.class);
+    Cluster cluster = createNiceMock(Cluster.class);
+    Service service = createNiceMock(Service.class);
+    StackId stackId = createNiceMock(StackId.class);
+    ServiceComponent component1 = createNiceMock(ServiceComponent.class);
+    ServiceComponent component2 = createNiceMock(ServiceComponent.class);
+
+    expect(service.getName()).andReturn("service");
+    expect(service.getDesiredStackVersion()).andReturn(stackId);
+    expect(stackId.getStackName()).andReturn("stack");
+    expect(stackId.getStackVersion()).andReturn("1.0");
+    Map<String, ServiceComponent> componentsMap = new HashMap<String, ServiceComponent>();
+    componentsMap.put("component1", component1);
+    componentsMap.put("component2", component2);
+    expect(service.getServiceComponents()).andReturn(componentsMap);
+    expect(component1.getServiceComponentHosts()).andReturn(Collections.EMPTY_MAP);
+    expect(component2.getServiceComponentHosts()).andReturn(
+        Collections.<String, ServiceComponentHost>singletonMap("anyHost", null));
+
+    ServiceInfo serviceInfo = createNiceMock(ServiceInfo.class);
+    expect(serviceInfo.getClientComponent()).andReturn(null);
+    expect(ambariMetaInfo.getServiceInfo("stack", "1.0", "service")).andReturn(serviceInfo);
+
+    replay(injector, cluster, service, component1, component2, serviceInfo, ambariMetaInfo, stackId);
+
+    AmbariManagementControllerImpl controller = new AmbariManagementControllerImpl(null, clusters, injector);
+    setAmbariMetaInfo(ambariMetaInfo, controller);
+    ServiceComponent resultComponent = controller.getClientComponentForRunningAction(cluster, service);
+
+    assertNotNull(resultComponent);
+    assertEquals(component2, resultComponent);
+    verify(injector, cluster, service, component1, component2, serviceInfo, ambariMetaInfo, stackId);
+  }
+
   /**
    * Ensure that ClusterNotFoundException is propagated in case where there is a single request.
    */
@@ -216,7 +395,6 @@ public class AmbariManagementControllerImplTest {
     // member state mocks
     Injector injector = createStrictMock(Injector.class);
     Capture<AmbariManagementController> controllerCapture = new Capture<AmbariManagementController>();
-    Clusters clusters = createNiceMock(Clusters.class);
 
     // requests
     ClusterRequest request1 = new ClusterRequest(null, "cluster1", "1", Collections.<String>emptySet());
@@ -259,7 +437,6 @@ public class AmbariManagementControllerImplTest {
     // member state mocks
     Injector injector = createStrictMock(Injector.class);
     Capture<AmbariManagementController> controllerCapture = new Capture<AmbariManagementController>();
-    Clusters clusters = createNiceMock(Clusters.class);
 
     Cluster cluster = createNiceMock(Cluster.class);
     Cluster cluster2 = createNiceMock(Cluster.class);
@@ -319,7 +496,6 @@ public class AmbariManagementControllerImplTest {
     Injector injector = createStrictMock(Injector.class);
     Cluster cluster = createNiceMock(Cluster.class);
     ActionManager actionManager = createNiceMock(ActionManager.class);
-    Clusters clusters = createNiceMock(Clusters.class);
     ClusterRequest clusterRequest = createNiceMock(ClusterRequest.class);
 
     // requests
@@ -359,7 +535,6 @@ public class AmbariManagementControllerImplTest {
     Injector injector = createStrictMock(Injector.class);
     Cluster cluster = createNiceMock(Cluster.class);
     ActionManager actionManager = createNiceMock(ActionManager.class);
-    Clusters clusters = createNiceMock(Clusters.class);
     ClusterRequest clusterRequest = createNiceMock(ClusterRequest.class);
 
     // requests
@@ -397,9 +572,7 @@ public class AmbariManagementControllerImplTest {
     // member state mocks
     Injector injector = createStrictMock(Injector.class);
     Capture<AmbariManagementController> controllerCapture = new Capture<AmbariManagementController>();
-    Clusters clusters = createNiceMock(Clusters.class);
     StackId stack = createNiceMock(StackId.class);
-    AmbariMetaInfo metaInfo = createStrictMock(AmbariMetaInfo.class);
 
     Cluster cluster = createNiceMock(Cluster.class);
     final Host host = createNiceMock(Host.class);
@@ -435,7 +608,7 @@ public class AmbariManagementControllerImplTest {
     expect(stack.getStackName()).andReturn("stackName");
     expect(stack.getStackVersion()).andReturn("stackVersion");
 
-    expect(metaInfo.getComponentToService("stackName", "stackVersion", "component1")).andReturn("service1");
+    expect(ambariMetaInfo.getComponentToService("stackName", "stackVersion", "component1")).andReturn("service1");
     expect(cluster.getService("service1")).andReturn(service);
     expect(service.getServiceComponent("component1")).andReturn(component);
     expect(component.getName()).andReturn("component1");
@@ -449,15 +622,11 @@ public class AmbariManagementControllerImplTest {
 
     // replay mocks
     replay(maintHelper, injector, clusters, cluster, host, response, stack,
-      metaInfo, service, component, componentHost);
+      ambariMetaInfo, service, component, componentHost);
 
     //test
     AmbariManagementController controller = new AmbariManagementControllerImpl(null, clusters, injector);
-    //need to set private field 'ambariMetaInfo' which is injected at runtime
-    Class<?> c = controller.getClass();
-    Field f = c.getDeclaredField("ambariMetaInfo");
-    f.setAccessible(true);
-    f.set(controller, metaInfo);
+    setAmbariMetaInfo(ambariMetaInfo, controller);
 
     Set<ServiceComponentHostResponse> setResponses = controller.getHostComponents(setRequests);
 
@@ -466,7 +635,7 @@ public class AmbariManagementControllerImplTest {
     assertEquals(1, setResponses.size());
     assertTrue(setResponses.contains(response));
 
-    verify(injector, clusters, cluster, host, response, stack, metaInfo, service, component, componentHost);
+    verify(injector, clusters, cluster, host, response, stack, ambariMetaInfo, service, component, componentHost);
   }
 
   @Test
@@ -474,9 +643,7 @@ public class AmbariManagementControllerImplTest {
     // member state mocks
     Injector injector = createStrictMock(Injector.class);
     Capture<AmbariManagementController> controllerCapture = new Capture<AmbariManagementController>();
-    Clusters clusters = createNiceMock(Clusters.class);
     StackId stack = createNiceMock(StackId.class);
-    AmbariMetaInfo metaInfo = createStrictMock(AmbariMetaInfo.class);
 
     Cluster cluster = createNiceMock(Cluster.class);
     Host host = createNiceMock(Host.class);
@@ -506,23 +673,19 @@ public class AmbariManagementControllerImplTest {
     expect(stack.getStackName()).andReturn("stackName");
     expect(stack.getStackVersion()).andReturn("stackVersion");
 
-    expect(metaInfo.getComponentToService("stackName", "stackVersion", "component1")).andReturn("service1");
+    expect(ambariMetaInfo.getComponentToService("stackName", "stackVersion", "component1")).andReturn("service1");
     expect(cluster.getService("service1")).andReturn(service);
     expect(service.getServiceComponent("component1")).andReturn(component);
     expect(component.getName()).andReturn("component1").anyTimes();
     expect(component.getServiceComponentHosts()).andReturn(null);
 
     // replay mocks
-    replay(maintHelper, injector, clusters, cluster, host, stack, metaInfo,
+    replay(maintHelper, injector, clusters, cluster, host, stack, ambariMetaInfo,
       service, component);
 
     //test
     AmbariManagementController controller = new AmbariManagementControllerImpl(null, clusters, injector);
-    //need to set private field 'ambariMetaInfo' which is injected at runtime
-    Class<?> c = controller.getClass();
-    Field f = c.getDeclaredField("ambariMetaInfo");
-    f.setAccessible(true);
-    f.set(controller, metaInfo);
+    setAmbariMetaInfo(ambariMetaInfo, controller);
 
     try {
       controller.getHostComponents(setRequests);
@@ -533,7 +696,7 @@ public class AmbariManagementControllerImplTest {
 
     // assert and verify
     assertSame(controller, controllerCapture.getValue());
-    verify(injector, clusters, cluster, host, stack, metaInfo, service, component);
+    verify(injector, clusters, cluster, host, stack, ambariMetaInfo, service, component);
   }
 
   @Test
@@ -541,9 +704,7 @@ public class AmbariManagementControllerImplTest {
     // member state mocks
     Injector injector = createStrictMock(Injector.class);
     Capture<AmbariManagementController> controllerCapture = new Capture<AmbariManagementController>();
-    Clusters clusters = createNiceMock(Clusters.class);
     StackId stack = createNiceMock(StackId.class);
-    AmbariMetaInfo metaInfo = createNiceMock(AmbariMetaInfo.class);
 
     Cluster cluster = createNiceMock(Cluster.class);
     final Host host = createNiceMock(Host.class);
@@ -598,7 +759,7 @@ public class AmbariManagementControllerImplTest {
     expect(stack.getStackName()).andReturn("stackName").anyTimes();
     expect(stack.getStackVersion()).andReturn("stackVersion").anyTimes();
 
-    expect(metaInfo.getComponentToService("stackName", "stackVersion", "component1")).andReturn("service1");
+    expect(ambariMetaInfo.getComponentToService("stackName", "stackVersion", "component1")).andReturn("service1");
     expect(service.getServiceComponent("component1")).andReturn(component);
     expect(component.getName()).andReturn("component1");
     expect(component.getServiceComponentHosts()).andReturn(
@@ -608,13 +769,13 @@ public class AmbariManagementControllerImplTest {
     expect(componentHost1.convertToResponse()).andReturn(response1);
     expect(componentHost1.getHostName()).andReturn("host1");
 
-    expect(metaInfo.getComponentToService("stackName", "stackVersion", "component2")).andReturn("service1");
+    expect(ambariMetaInfo.getComponentToService("stackName", "stackVersion", "component2")).andReturn("service1");
     expect(service.getServiceComponent("component2")).andReturn(component2);
     expect(component2.getName()).andReturn("component2");
     expect(component2.getServiceComponentHosts()).andReturn(null);
     expect(componentHost2.getHostName()).andReturn("host1");
 
-    expect(metaInfo.getComponentToService("stackName", "stackVersion", "component3")).andReturn("service1");
+    expect(ambariMetaInfo.getComponentToService("stackName", "stackVersion", "component3")).andReturn("service1");
     expect(service.getServiceComponent("component3")).andReturn(component3);
     expect(component3.getName()).andReturn("component3");
     expect(component3.getServiceComponentHosts()).andReturn(
@@ -625,16 +786,12 @@ public class AmbariManagementControllerImplTest {
 
     // replay mocks
     replay(stateHelper, injector, clusters, cluster, host, stack,
-        metaInfo, service, component, component2, component3, componentHost1,
+        ambariMetaInfo, service, component, component2, component3, componentHost1,
         componentHost2, response1, response2);
 
     //test
     AmbariManagementController controller = new AmbariManagementControllerImpl(null, clusters, injector);
-    //need to set private field 'ambariMetaInfo' which is injected at runtime
-    Class<?> c = controller.getClass();
-    Field f = c.getDeclaredField("ambariMetaInfo");
-    f.setAccessible(true);
-    f.set(controller, metaInfo);
+    setAmbariMetaInfo(ambariMetaInfo, controller);
 
     Set<ServiceComponentHostResponse> setResponses = controller.getHostComponents(setRequests);
 
@@ -644,7 +801,7 @@ public class AmbariManagementControllerImplTest {
     assertTrue(setResponses.contains(response1));
     assertTrue(setResponses.contains(response2));
 
-    verify(injector, clusters, cluster, host, stack, metaInfo, service, component, component2, component3,
+    verify(injector, clusters, cluster, host, stack, ambariMetaInfo, service, component, component2, component3,
         componentHost1, componentHost2, response1, response2);
   }
 
@@ -653,9 +810,7 @@ public class AmbariManagementControllerImplTest {
     // member state mocks
     Injector injector = createStrictMock(Injector.class);
     Capture<AmbariManagementController> controllerCapture = new Capture<AmbariManagementController>();
-    Clusters clusters = createNiceMock(Clusters.class);
     StackId stack = createNiceMock(StackId.class);
-    AmbariMetaInfo metaInfo = createNiceMock(AmbariMetaInfo.class);
 
     Cluster cluster = createNiceMock(Cluster.class);
     final Host host = createNiceMock(Host.class);
@@ -706,7 +861,7 @@ public class AmbariManagementControllerImplTest {
         put("host1", host);
       }}).anyTimes();
 
-    expect(metaInfo.getComponentToService("stackName", "stackVersion", "component1")).andReturn("service1");
+    expect(ambariMetaInfo.getComponentToService("stackName", "stackVersion", "component1")).andReturn("service1");
     expect(cluster.getService("service1")).andReturn(service);
     expect(service.getServiceComponent("component1")).andReturn(component);
     expect(component.getName()).andReturn("component1");
@@ -717,10 +872,10 @@ public class AmbariManagementControllerImplTest {
     expect(componentHost1.convertToResponse()).andReturn(response1);
     expect(componentHost1.getHostName()).andReturn("host1");
 
-    expect(metaInfo.getComponentToService("stackName", "stackVersion", "component2")).andReturn("service2");
+    expect(ambariMetaInfo.getComponentToService("stackName", "stackVersion", "component2")).andReturn("service2");
     expect(cluster.getService("service2")).andThrow(new ServiceNotFoundException("cluster1", "service2"));
 
-    expect(metaInfo.getComponentToService("stackName", "stackVersion", "component3")).andReturn("service1");
+    expect(ambariMetaInfo.getComponentToService("stackName", "stackVersion", "component3")).andReturn("service1");
     expect(cluster.getService("service1")).andReturn(service);
     expect(service.getServiceComponent("component3")).andReturn(component3);
     expect(component3.getName()).andReturn("component3");
@@ -732,17 +887,13 @@ public class AmbariManagementControllerImplTest {
     expect(componentHost2.getHostName()).andReturn("host1");
 
     // replay mocks
-    replay(maintHelper, injector, clusters, cluster, host, stack, metaInfo,
+    replay(maintHelper, injector, clusters, cluster, host, stack, ambariMetaInfo,
         service, component, component2, component3, componentHost1,
         componentHost2, response1, response2);
 
     //test
     AmbariManagementController controller = new AmbariManagementControllerImpl(null, clusters, injector);
-    //need to set private field 'ambariMetaInfo' which is injected at runtime
-    Class<?> c = controller.getClass();
-    Field f = c.getDeclaredField("ambariMetaInfo");
-    f.setAccessible(true);
-    f.set(controller, metaInfo);
+    setAmbariMetaInfo(ambariMetaInfo, controller);
 
     Set<ServiceComponentHostResponse> setResponses = controller.getHostComponents(setRequests);
 
@@ -752,7 +903,7 @@ public class AmbariManagementControllerImplTest {
     assertTrue(setResponses.contains(response1));
     assertTrue(setResponses.contains(response2));
 
-    verify(injector, clusters, cluster, host, stack, metaInfo, service, component, component2, component3,
+    verify(injector, clusters, cluster, host, stack, ambariMetaInfo, service, component, component2, component3,
         componentHost1, componentHost2, response1, response2);
   }
 
@@ -761,9 +912,7 @@ public class AmbariManagementControllerImplTest {
     // member state mocks
     Injector injector = createStrictMock(Injector.class);
     Capture<AmbariManagementController> controllerCapture = new Capture<AmbariManagementController>();
-    Clusters clusters = createNiceMock(Clusters.class);
     StackId stack = createNiceMock(StackId.class);
-    AmbariMetaInfo metaInfo = createNiceMock(AmbariMetaInfo.class);
 
     Cluster cluster = createNiceMock(Cluster.class);
     final Host host = createNiceMock(Host.class);
@@ -817,7 +966,7 @@ public class AmbariManagementControllerImplTest {
     expect(stack.getStackVersion()).andReturn("stackVersion").anyTimes();
 
 
-    expect(metaInfo.getComponentToService("stackName", "stackVersion", "component1")).andReturn("service1");
+    expect(ambariMetaInfo.getComponentToService("stackName", "stackVersion", "component1")).andReturn("service1");
     expect(cluster.getService("service1")).andReturn(service);
     expect(service.getServiceComponent("component1")).andReturn(component);
     expect(component.getName()).andReturn("component1");
@@ -828,12 +977,12 @@ public class AmbariManagementControllerImplTest {
     expect(componentHost1.convertToResponse()).andReturn(response1);
     expect(componentHost1.getHostName()).andReturn("host1");
 
-    expect(metaInfo.getComponentToService("stackName", "stackVersion", "component2")).andReturn("service2");
+    expect(ambariMetaInfo.getComponentToService("stackName", "stackVersion", "component2")).andReturn("service2");
     expect(cluster.getService("service2")).andReturn(service2);
     expect(service2.getServiceComponent("component2")).
         andThrow(new ServiceComponentNotFoundException("cluster1", "service2", "component2"));
 
-    expect(metaInfo.getComponentToService("stackName", "stackVersion", "component3")).andReturn("service1");
+    expect(ambariMetaInfo.getComponentToService("stackName", "stackVersion", "component3")).andReturn("service1");
     expect(cluster.getService("service1")).andReturn(service);
     expect(service.getServiceComponent("component3")).andReturn(component3);
     expect(component3.getName()).andReturn("component3");
@@ -845,17 +994,13 @@ public class AmbariManagementControllerImplTest {
     expect(componentHost2.getHostName()).andReturn("host1");
 
     // replay mocks
-    replay(maintHelper, injector, clusters, cluster, host, stack, metaInfo,
+    replay(maintHelper, injector, clusters, cluster, host, stack, ambariMetaInfo,
       service, service2, component, component2, component3, componentHost1,
       componentHost2, response1, response2);
 
     //test
     AmbariManagementController controller = new AmbariManagementControllerImpl(null, clusters, injector);
-    //need to set private field 'ambariMetaInfo' which is injected at runtime
-    Class<?> c = controller.getClass();
-    Field f = c.getDeclaredField("ambariMetaInfo");
-    f.setAccessible(true);
-    f.set(controller, metaInfo);
+    setAmbariMetaInfo(ambariMetaInfo, controller);
 
     Set<ServiceComponentHostResponse> setResponses = controller.getHostComponents(setRequests);
 
@@ -865,7 +1010,7 @@ public class AmbariManagementControllerImplTest {
     assertTrue(setResponses.contains(response1));
     assertTrue(setResponses.contains(response2));
 
-    verify(injector, clusters, cluster, host, stack, metaInfo, service, service2, component, component2, component3,
+    verify(injector, clusters, cluster, host, stack, ambariMetaInfo, service, service2, component, component2, component3,
         componentHost1, componentHost2, response1, response2);
   }
 
@@ -874,9 +1019,7 @@ public class AmbariManagementControllerImplTest {
     // member state mocks
     Injector injector = createStrictMock(Injector.class);
     Capture<AmbariManagementController> controllerCapture = new Capture<AmbariManagementController>();
-    Clusters clusters = createNiceMock(Clusters.class);
     StackId stack = createNiceMock(StackId.class);
-    AmbariMetaInfo metaInfo = createNiceMock(AmbariMetaInfo.class);
 
     Cluster cluster = createNiceMock(Cluster.class);
     final Host host = createNiceMock(Host.class);
@@ -928,7 +1071,7 @@ public class AmbariManagementControllerImplTest {
     expect(stack.getStackName()).andReturn("stackName").anyTimes();
     expect(stack.getStackVersion()).andReturn("stackVersion").anyTimes();
 
-    expect(metaInfo.getComponentToService("stackName", "stackVersion", "component1")).andReturn("service1");
+    expect(ambariMetaInfo.getComponentToService("stackName", "stackVersion", "component1")).andReturn("service1");
     expect(cluster.getService("service1")).andReturn(service);
     expect(service.getServiceComponent("component1")).andReturn(component);
     expect(component.getName()).andReturn("component1");
@@ -938,7 +1081,7 @@ public class AmbariManagementControllerImplTest {
 
     expect(clusters.getClustersForHost("host2")).andThrow(new HostNotFoundException("host2"));
 
-    expect(metaInfo.getComponentToService("stackName", "stackVersion", "component3")).andReturn("service1");
+    expect(ambariMetaInfo.getComponentToService("stackName", "stackVersion", "component3")).andReturn("service1");
     expect(cluster.getService("service1")).andReturn(service);
     expect(service.getServiceComponent("component3")).andReturn(component3);
     expect(component3.getName()).andReturn("component3");
@@ -947,17 +1090,13 @@ public class AmbariManagementControllerImplTest {
     expect(componentHost2.getHostName()).andReturn("host1");
 
     // replay mocks
-    replay(maintHelper, injector, clusters, cluster, host, stack, metaInfo,
+    replay(maintHelper, injector, clusters, cluster, host, stack, ambariMetaInfo,
         service, service2, component, component2, component3, componentHost1,
         componentHost2, response1, response2);
 
     //test
     AmbariManagementController controller = new AmbariManagementControllerImpl(null, clusters, injector);
-    //need to set private field 'ambariMetaInfo' which is injected at runtime
-    Class<?> c = controller.getClass();
-    Field f = c.getDeclaredField("ambariMetaInfo");
-    f.setAccessible(true);
-    f.set(controller, metaInfo);
+    setAmbariMetaInfo(ambariMetaInfo, controller);
 
     Set<ServiceComponentHostResponse> setResponses = controller.getHostComponents(setRequests);
     Assert.assertNotNull(setResponses);
@@ -968,7 +1107,7 @@ public class AmbariManagementControllerImplTest {
     assertTrue(setResponses.contains(response1));
     assertTrue(setResponses.contains(response2));
 
-    verify(injector, clusters, cluster, host, stack, metaInfo, service, service2, component, component2, component3,
+    verify(injector, clusters, cluster, host, stack, ambariMetaInfo, service, service2, component, component2, component3,
         componentHost1, componentHost2, response1, response2);
   }
 
@@ -977,9 +1116,7 @@ public class AmbariManagementControllerImplTest {
     // member state mocks
     Injector injector = createStrictMock(Injector.class);
     Capture<AmbariManagementController> controllerCapture = new Capture<AmbariManagementController>();
-    Clusters clusters = createNiceMock(Clusters.class);
     StackId stack = createNiceMock(StackId.class);
-    AmbariMetaInfo metaInfo = createNiceMock(AmbariMetaInfo.class);
     MaintenanceStateHelper maintHelper = createNiceMock(MaintenanceStateHelper.class);
 
     Cluster cluster = createNiceMock(Cluster.class);
@@ -1011,15 +1148,11 @@ public class AmbariManagementControllerImplTest {
     expect(clusters.getClustersForHost("host1")).andThrow(new HostNotFoundException("host1"));
 
     // replay mocks
-    replay(maintHelper, injector, clusters, cluster, stack, metaInfo);
+    replay(maintHelper, injector, clusters, cluster, stack, ambariMetaInfo);
 
     //test
     AmbariManagementController controller = new AmbariManagementControllerImpl(null, clusters, injector);
-    //need to set private field 'ambariMetaInfo' which is injected at runtime
-    Class<?> c = controller.getClass();
-    Field f = c.getDeclaredField("ambariMetaInfo");
-    f.setAccessible(true);
-    f.set(controller, metaInfo);
+    setAmbariMetaInfo(ambariMetaInfo, controller);
 
     try {
       controller.getHostComponents(setRequests);
@@ -1031,7 +1164,7 @@ public class AmbariManagementControllerImplTest {
     // assert and verify
     assertSame(controller, controllerCapture.getValue());
 
-    verify(injector, clusters, cluster, stack, metaInfo);
+    verify(injector, clusters, cluster, stack, ambariMetaInfo);
   }
 
   @Test
@@ -1039,9 +1172,7 @@ public class AmbariManagementControllerImplTest {
     // member state mocks
     Injector injector = createStrictMock(Injector.class);
     Capture<AmbariManagementController> controllerCapture = new Capture<AmbariManagementController>();
-    Clusters clusters = createNiceMock(Clusters.class);
     StackId stack = createNiceMock(StackId.class);
-    AmbariMetaInfo metaInfo = createNiceMock(AmbariMetaInfo.class);
     MaintenanceStateHelper maintHelper = createNiceMock(MaintenanceStateHelper.class);
 
     // requests
@@ -1070,15 +1201,11 @@ public class AmbariManagementControllerImplTest {
     expect(clusters.getCluster("cluster1")).andThrow(new ClusterNotFoundException("cluster1"));
 
     // replay mocks
-    replay(maintHelper, injector, clusters, stack, metaInfo);
+    replay(maintHelper, injector, clusters, stack, ambariMetaInfo);
 
     //test
     AmbariManagementController controller = new AmbariManagementControllerImpl(null, clusters, injector);
-    //need to set private field 'ambariMetaInfo' which is injected at runtime
-    Class<?> c = controller.getClass();
-    Field f = c.getDeclaredField("ambariMetaInfo");
-    f.setAccessible(true);
-    f.set(controller, metaInfo);
+    setAmbariMetaInfo(ambariMetaInfo, controller);
 
     try {
       controller.getHostComponents(setRequests);
@@ -1090,7 +1217,7 @@ public class AmbariManagementControllerImplTest {
     // assert and verify
     assertSame(controller, controllerCapture.getValue());
 
-    verify(injector, clusters,stack, metaInfo);
+    verify(injector, clusters,stack, ambariMetaInfo);
   }
 
   @Test
@@ -1098,9 +1225,7 @@ public class AmbariManagementControllerImplTest {
     // member state mocks
     Injector injector = createStrictMock(Injector.class);
     Capture<AmbariManagementController> controllerCapture = new Capture<AmbariManagementController>();
-    Clusters clusters = createNiceMock(Clusters.class);
     StackId stack = createNiceMock(StackId.class);
-    AmbariMetaInfo metaInfo = createStrictMock(AmbariMetaInfo.class);
 
     Cluster cluster = createNiceMock(Cluster.class);
     Service service = createNiceMock(Service.class);
@@ -1143,7 +1268,7 @@ public class AmbariManagementControllerImplTest {
     expect(stack.getStackName()).andReturn("stackName");
     expect(stack.getStackVersion()).andReturn("stackVersion");
 
-    expect(metaInfo.getComponentToService("stackName", "stackVersion", "component1")).andReturn("service1");
+    expect(ambariMetaInfo.getComponentToService("stackName", "stackVersion", "component1")).andReturn("service1");
     expect(cluster.getService("service1")).andReturn(service);
     expect(service.getServiceComponent("component1")).andReturn(component);
     expect(component.getName()).andReturn("component1").anyTimes();
@@ -1156,15 +1281,11 @@ public class AmbariManagementControllerImplTest {
 
     // replay mocks
     replay(maintHelper, injector, clusters, cluster, response1, response2,
-        stack, metaInfo, service, component, componentHost1, componentHost2);
+        stack, ambariMetaInfo, service, component, componentHost1, componentHost2);
 
     //test
     AmbariManagementController controller = new AmbariManagementControllerImpl(null, clusters, injector);
-    //need to set private field 'ambariMetaInfo' which is injected at runtime
-    Class<?> c = controller.getClass();
-    Field f = c.getDeclaredField("ambariMetaInfo");
-    f.setAccessible(true);
-    f.set(controller, metaInfo);
+    setAmbariMetaInfo(ambariMetaInfo, controller);
 
     Set<ServiceComponentHostResponse> setResponses = controller.getHostComponents(setRequests);
 
@@ -1174,7 +1295,7 @@ public class AmbariManagementControllerImplTest {
     assertTrue(setResponses.contains(response1));
     assertTrue(setResponses.contains(response2));
 
-    verify(injector, clusters, cluster, response1, response2, stack, metaInfo, service, component, componentHost1, componentHost2);
+    verify(injector, clusters, cluster, response1, response2, stack, ambariMetaInfo, service, component, componentHost1, componentHost2);
   }
 
   @Test
@@ -1182,9 +1303,7 @@ public class AmbariManagementControllerImplTest {
     // member state mocks
     Injector injector = createStrictMock(Injector.class);
     Capture<AmbariManagementController> controllerCapture = new Capture<AmbariManagementController>();
-    Clusters clusters = createNiceMock(Clusters.class);
     StackId stack = createNiceMock(StackId.class);
-    AmbariMetaInfo metaInfo = createStrictMock(AmbariMetaInfo.class);
 
     Cluster cluster = createNiceMock(Cluster.class);
     Service service1 = createNiceMock(Service.class);
@@ -1251,16 +1370,12 @@ public class AmbariManagementControllerImplTest {
 
     // replay mocks
     replay(maintHelper, injector, clusters, cluster, response1, response2,
-        response3, stack, metaInfo, service1, service2, component1, component2,
+        response3, stack, ambariMetaInfo, service1, service2, component1, component2,
         componentHost1, componentHost2, componentHost3);
 
     //test
     AmbariManagementController controller = new AmbariManagementControllerImpl(null, clusters, injector);
-    //need to set private field 'ambariMetaInfo' which is injected at runtime
-    Class<?> c = controller.getClass();
-    Field f = c.getDeclaredField("ambariMetaInfo");
-    f.setAccessible(true);
-    f.set(controller, metaInfo);
+    setAmbariMetaInfo(ambariMetaInfo, controller);
 
     Set<ServiceComponentHostResponse> setResponses = controller.getHostComponents(setRequests);
 
@@ -1271,7 +1386,7 @@ public class AmbariManagementControllerImplTest {
     assertTrue(setResponses.contains(response2));
     assertTrue(setResponses.contains(response3));
 
-    verify(injector, clusters, cluster, response1, response2, response3, stack, metaInfo, service1, service2,
+    verify(injector, clusters, cluster, response1, response2, response3, stack, ambariMetaInfo, service1, service2,
         component1, component2, componentHost1, componentHost2, componentHost3);
   }
 
@@ -1280,7 +1395,6 @@ public class AmbariManagementControllerImplTest {
     Capture<AmbariManagementController> controllerCapture = new Capture<AmbariManagementController>();
     Injector injector = createStrictMock(Injector.class);
     MaintenanceStateHelper maintHelper = createNiceMock(MaintenanceStateHelper.class);
-    Clusters clusters = createNiceMock(Clusters.class);
 
     ServiceInfo serviceInfo = createNiceMock(ServiceInfo.class);
     Map<String, String> hostParams = new HashMap<String, String>();
@@ -1336,7 +1450,6 @@ public class AmbariManagementControllerImplTest {
     String SERVER_DB_NAME = "ServerDBName";
 
     ActionManager manager = createNiceMock(ActionManager.class);
-    Clusters clusters = createNiceMock(Clusters.class);
     StackId stackId = createNiceMock(StackId.class);
     Cluster cluster = createNiceMock(Cluster.class);
     Injector injector = createNiceMock(Injector.class);
@@ -1432,6 +1545,14 @@ public class AmbariManagementControllerImplTest {
     verify(ldapDataPopulator, clusters, users, ldapBatchDto);
   }
 
+  private void setAmbariMetaInfo(AmbariMetaInfo metaInfo, AmbariManagementController controller) throws NoSuchFieldException, IllegalAccessException {
+    //need to set private field 'ambariMetaInfo' which is injected at runtime
+    Class<?> c = controller.getClass();
+    Field f = c.getDeclaredField("ambariMetaInfo");
+    f.setAccessible(true);
+    f.set(controller, metaInfo);
+  }
+
   private class MockModule implements Module {
 
     @Override