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From dmitriu...@apache.org
Subject [2/2] ambari git commit: AMBARI-12703. Stop-and-Start Upgrade: Revise PreChecks (dgrinenko via dlysnichenko)
Date Wed, 16 Sep 2015 09:31:07 GMT
AMBARI-12703. Stop-and-Start Upgrade: Revise PreChecks (dgrinenko via dlysnichenko)


Project: http://git-wip-us.apache.org/repos/asf/ambari/repo
Commit: http://git-wip-us.apache.org/repos/asf/ambari/commit/df0d238a
Tree: http://git-wip-us.apache.org/repos/asf/ambari/tree/df0d238a
Diff: http://git-wip-us.apache.org/repos/asf/ambari/diff/df0d238a

Branch: refs/heads/branch-dev-stop-all-upgrade
Commit: df0d238a1541d06301b924dba56da1c7fc95912d
Parents: 247e728
Author: Lisnichenko Dmitro <dlysnichenko@hortonworks.com>
Authored: Wed Sep 16 12:31:02 2015 +0300
Committer: Lisnichenko Dmitro <dlysnichenko@hortonworks.com>
Committed: Wed Sep 16 12:31:02 2015 +0300

----------------------------------------------------------------------
 .../server/checks/AbstractCheckDescriptor.java  | 56 ++++++++++------
 .../server/checks/ClientRetryPropertyCheck.java | 17 +----
 .../server/checks/ConfigurationMergeCheck.java  | 29 +--------
 .../HiveDynamicServiceDiscoveryCheck.java       | 15 +----
 .../checks/HiveMultipleMetastoreCheck.java      | 13 +---
 .../server/checks/HostsHeartbeatCheck.java      |  2 +-
 .../checks/HostsMasterMaintenanceCheck.java     | 11 +---
 .../checks/HostsRepositoryVersionCheck.java     | 11 +---
 ...apReduce2JobHistoryStatePreservingCheck.java |  7 +-
 .../checks/SecondaryNamenodeDeletedCheck.java   | 10 +--
 .../checks/ServicesMaintenanceModeCheck.java    |  3 +-
 .../ServicesMapReduceDistributedCacheCheck.java | 10 +--
 .../ServicesNamenodeHighAvailabilityCheck.java  | 13 +---
 .../checks/ServicesNamenodeTruncateCheck.java   | 11 +---
 .../ServicesTezDistributedCacheCheck.java       | 10 +--
 .../ambari/server/checks/ServicesUpCheck.java   |  2 +-
 .../checks/ServicesYarnWorkPreservingCheck.java | 14 +---
 .../ambari/server/checks/UpgradeCheck.java      |  8 +++
 .../server/checks/UpgradeCheckRegistry.java     | 19 ++++++
 .../checks/YarnRMHighAvailabilityCheck.java     | 13 +---
 .../YarnTimelineServerStatePreservingCheck.java |  7 +-
 .../PreUpgradeCheckResourceProvider.java        | 30 ++++++++-
 .../internal/UpgradeResourceProvider.java       | 67 +++-----------------
 .../ambari/server/state/UpgradeHelper.java      | 65 ++++++++++++++++++-
 .../ambari/server/state/stack/UpgradePack.java  | 11 ++++
 .../HDP/2.2/upgrades/nonrolling-upgrade-2.2.xml |  4 +-
 .../stacks/HDP/2.2/upgrades/upgrade-2.2.xml     | 13 +++-
 .../stacks/HDP/2.2/upgrades/upgrade-2.3.xml     | 12 ++++
 .../stacks/HDP/2.3/upgrades/upgrade-2.3.xml     | 13 ++++
 .../checks/ConfigurationMergeCheckTest.java     | 30 ---------
 .../checks/HostsMasterMaintenanceCheckTest.java |  3 -
 .../checks/HostsRepositoryVersionCheckTest.java |  3 -
 .../SecondaryNamenodeDeletedCheckTest.java      | 16 +++--
 ...vicesMapReduceDistributedCacheCheckTest.java | 14 ++--
 ...rvicesNamenodeHighAvailabilityCheckTest.java | 10 ++-
 .../ServicesNamenodeTruncateCheckTest.java      |  8 ++-
 .../ServicesTezDistributedCacheCheckTest.java   | 15 +++--
 .../ServicesYarnWorkPreservingCheckTest.java    | 10 ++-
 .../UpgradeResourceProviderHDP22Test.java       |  1 -
 .../internal/UpgradeResourceProviderTest.java   | 10 ++-
 .../ambari/server/state/UpgradeHelperTest.java  | 67 ++++++++++++++++----
 .../HDP/2.1.1/upgrades/upgrade_bucket_test.xml  | 15 ++++-
 .../HDP/2.1.1/upgrades/upgrade_direction.xml    |  2 +-
 .../stacks/HDP/2.1.1/upgrades/upgrade_test.xml  |  2 +-
 .../HDP/2.1.1/upgrades/upgrade_test_checks.xml  | 13 +++-
 .../2.1.1/upgrades/upgrade_test_nonrolling.xml  | 15 ++++-
 .../HDP/2.1.1/upgrades/upgrade_to_new_stack.xml | 15 ++++-
 .../stacks/HDP/2.2.0/upgrades/upgrade_test.xml  | 14 +++-
 .../HDP/2.2.0/upgrades/upgrade_test_checks.xml  | 16 ++++-
 49 files changed, 435 insertions(+), 340 deletions(-)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/ambari/blob/df0d238a/ambari-server/src/main/java/org/apache/ambari/server/checks/AbstractCheckDescriptor.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/java/org/apache/ambari/server/checks/AbstractCheckDescriptor.java b/ambari-server/src/main/java/org/apache/ambari/server/checks/AbstractCheckDescriptor.java
index 44cec85..649db02 100644
--- a/ambari-server/src/main/java/org/apache/ambari/server/checks/AbstractCheckDescriptor.java
+++ b/ambari-server/src/main/java/org/apache/ambari/server/checks/AbstractCheckDescriptor.java
@@ -18,7 +18,9 @@
 package org.apache.ambari.server.checks;
 
 import java.util.LinkedHashSet;
+import java.util.List;
 import java.util.Map;
+import java.util.Set;
 
 import org.apache.ambari.server.AmbariException;
 import org.apache.ambari.server.api.services.AmbariMetaInfo;
@@ -80,7 +82,7 @@ public abstract class AbstractCheckDescriptor {
 
   /**
    * Tests if the prerequisite check is applicable to given cluster. This
-   * method's defautl logic is to ensure that the cluster stack source and
+   * method's default logic is to ensure that the cluster stack source and
    * target are compatible with the prerequisite check. When overridding this
    * method, call {@code super#isApplicable(PrereqCheckRequest)}.
    *
@@ -92,26 +94,36 @@ public abstract class AbstractCheckDescriptor {
    *           if server error happens
    */
   public boolean isApplicable(PrereqCheckRequest request) throws AmbariException {
-    StackId sourceStackId = getSourceStack();
-    StackId targetStackId = getTargetStack();
-
-    if( null == sourceStackId && null == targetStackId ) {
-      return true;
-    }
-
-    StackId requestSourceStack = request.getSourceStackId();
-    if (null != sourceStackId && null != requestSourceStack
-        && sourceStackId.compareTo(requestSourceStack) > 0) {
-      return false;
-    }
+    // this is default behaviour
+   return true;
+  }
 
-    StackId requestTargetStack = request.getTargetStackId();
-    if (null != targetStackId && null != requestTargetStack
-        && targetStackId.compareTo(requestTargetStack) < 0) {
-      return false;
+  /**
+   * Same like {@code isApplicable(PrereqCheckRequest request)}, but with service presence check
+   * @param request
+   *          prerequisite check request
+   * @param requiredServices
+   *          set of services, which need to be present to allow check execution
+   * @param requiredAll
+   *          require all services in the list or at least one need to present
+   * @return true if check should be performed
+   * @throws org.apache.ambari.server.AmbariException
+   *           if server error happens
+   */
+  public boolean isApplicable(PrereqCheckRequest request, List<String> requiredServices, boolean requiredAll) throws AmbariException {
+    final Cluster cluster = clustersProvider.get().getCluster(request.getClusterName());
+    Set<String> services = cluster.getServices().keySet();
+    boolean serviceFound = false;
+
+    for (String service : requiredServices) {
+      if (services.contains(service) && !requiredAll) {
+        serviceFound = true;
+      } else if (!services.contains(service) && requiredAll) {
+        return false;
+      }
     }
 
-    return true;
+    return !(!serviceFound && !requiredAll);
   }
 
   /**
@@ -281,4 +293,12 @@ public abstract class AbstractCheckDescriptor {
 
     return formatted.toString();
   }
+
+  /**
+   * Return the optionality flag of the Upgrade Check
+   * @return
+   */
+  public Boolean isRequired(){
+      return getClass().getAnnotation(UpgradeCheck.class).required();
+  }
 }

http://git-wip-us.apache.org/repos/asf/ambari/blob/df0d238a/ambari-server/src/main/java/org/apache/ambari/server/checks/ClientRetryPropertyCheck.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/java/org/apache/ambari/server/checks/ClientRetryPropertyCheck.java b/ambari-server/src/main/java/org/apache/ambari/server/checks/ClientRetryPropertyCheck.java
index 52fca40..368bcb8 100644
--- a/ambari-server/src/main/java/org/apache/ambari/server/checks/ClientRetryPropertyCheck.java
+++ b/ambari-server/src/main/java/org/apache/ambari/server/checks/ClientRetryPropertyCheck.java
@@ -18,6 +18,7 @@
 package org.apache.ambari.server.checks;
 
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.List;
 import java.util.Map;
 
@@ -36,7 +37,7 @@ import com.google.inject.Singleton;
  * client retry properties for HDFS, HIVE, and OOZIE are set.
  */
 @Singleton
-@UpgradeCheck(group = UpgradeCheckGroup.CLIENT_RETRY_PROPERTY)
+@UpgradeCheck(group = UpgradeCheckGroup.CLIENT_RETRY_PROPERTY, required = true)
 public class ClientRetryPropertyCheck extends AbstractCheckDescriptor {
 
   static final String HIVE_CLIENT_RETRY_MISSING_KEY = "hive.client.retry.missing.key";
@@ -54,19 +55,7 @@ public class ClientRetryPropertyCheck extends AbstractCheckDescriptor {
    */
   @Override
   public boolean isApplicable(PrereqCheckRequest request) throws AmbariException {
-    if (!super.isApplicable(request)) {
-      return false;
-    }
-
-    final Cluster cluster = clustersProvider.get().getCluster(request.getClusterName());
-    Map<String, Service> services = cluster.getServices();
-
-    if (services.containsKey("HDFS") || services.containsKey("HIVE")
-        || services.containsKey("OOZIE")) {
-      return true;
-    }
-
-    return false;
+    return super.isApplicable(request, Arrays.asList("HDFS", "HIVE", "OOZIE"), false);
   }
 
   /**

http://git-wip-us.apache.org/repos/asf/ambari/blob/df0d238a/ambari-server/src/main/java/org/apache/ambari/server/checks/ConfigurationMergeCheck.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/java/org/apache/ambari/server/checks/ConfigurationMergeCheck.java b/ambari-server/src/main/java/org/apache/ambari/server/checks/ConfigurationMergeCheck.java
index b81ca11..a47512e 100644
--- a/ambari-server/src/main/java/org/apache/ambari/server/checks/ConfigurationMergeCheck.java
+++ b/ambari-server/src/main/java/org/apache/ambari/server/checks/ConfigurationMergeCheck.java
@@ -39,7 +39,7 @@ import com.google.inject.Singleton;
  * Checks for configuration merge conflicts.
  */
 @Singleton
-@UpgradeCheck(order = 99.0f)
+@UpgradeCheck(order = 99.0f, required = true)
 public class ConfigurationMergeCheck extends AbstractCheckDescriptor {
 
   @Inject
@@ -49,33 +49,6 @@ public class ConfigurationMergeCheck extends AbstractCheckDescriptor {
     super(CheckDescription.CONFIG_MERGE);
   }
 
-  @Override
-  public boolean isApplicable(PrereqCheckRequest request) throws AmbariException {
-    if (!super.isApplicable(request)) {
-      return false;
-    }
-
-    String stackName = request.getTargetStackId().getStackName();
-    String repoVersion = request.getRepositoryVersion();
-    if (null == repoVersion) {
-      return false;
-    }
-
-    RepositoryVersionEntity rve = repositoryVersionDaoProvider.get().findByStackNameAndVersion(stackName, repoVersion);
-    if (null == rve) {
-      return false;
-    }
-
-    Cluster cluster = clustersProvider.get().getCluster(request.getClusterName());
-
-    if (rve.getStackId().equals(cluster.getCurrentStackVersion())) {
-      return false;
-    }
-
-    return true;
-  }
-
-
   /**
    * The following logic determines if a warning is generated for config merge
    * issues:

http://git-wip-us.apache.org/repos/asf/ambari/blob/df0d238a/ambari-server/src/main/java/org/apache/ambari/server/checks/HiveDynamicServiceDiscoveryCheck.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/java/org/apache/ambari/server/checks/HiveDynamicServiceDiscoveryCheck.java b/ambari-server/src/main/java/org/apache/ambari/server/checks/HiveDynamicServiceDiscoveryCheck.java
index 4ea5484..d8f51a2 100644
--- a/ambari-server/src/main/java/org/apache/ambari/server/checks/HiveDynamicServiceDiscoveryCheck.java
+++ b/ambari-server/src/main/java/org/apache/ambari/server/checks/HiveDynamicServiceDiscoveryCheck.java
@@ -18,6 +18,7 @@
 package org.apache.ambari.server.checks;
 
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.List;
 import java.util.Map;
 
@@ -37,7 +38,7 @@ import com.google.inject.Singleton;
  * is properly configured for dynamic discovery.
  */
 @Singleton
-@UpgradeCheck(group = UpgradeCheckGroup.DEFAULT, order = 1.0f)
+@UpgradeCheck(group = UpgradeCheckGroup.DEFAULT, order = 1.0f, required = true)
 public class HiveDynamicServiceDiscoveryCheck extends AbstractCheckDescriptor {
 
   static final String HIVE_DYNAMIC_SERVICE_DISCOVERY_ENABLED_KEY = "hive.dynamic-service.discovery.enabled.key";
@@ -56,17 +57,7 @@ public class HiveDynamicServiceDiscoveryCheck extends AbstractCheckDescriptor {
    */
   @Override
   public boolean isApplicable(PrereqCheckRequest request) throws AmbariException {
-    if (!super.isApplicable(request)) {
-      return false;
-    }
-
-    final Cluster cluster = clustersProvider.get().getCluster(request.getClusterName());
-    Map<String, Service> services = cluster.getServices();
-    if (services.containsKey("HIVE")) {
-      return true;
-    }
-
-    return false;
+    return super.isApplicable(request, Arrays.asList("HIVE"), true);
   }
 
   /**

http://git-wip-us.apache.org/repos/asf/ambari/blob/df0d238a/ambari-server/src/main/java/org/apache/ambari/server/checks/HiveMultipleMetastoreCheck.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/java/org/apache/ambari/server/checks/HiveMultipleMetastoreCheck.java b/ambari-server/src/main/java/org/apache/ambari/server/checks/HiveMultipleMetastoreCheck.java
index c387a4b..14b8435 100644
--- a/ambari-server/src/main/java/org/apache/ambari/server/checks/HiveMultipleMetastoreCheck.java
+++ b/ambari-server/src/main/java/org/apache/ambari/server/checks/HiveMultipleMetastoreCheck.java
@@ -17,6 +17,7 @@
  */
 package org.apache.ambari.server.checks;
 
+import java.util.Arrays;
 import java.util.Map;
 
 import org.apache.ambari.server.AmbariException;
@@ -51,17 +52,7 @@ public class HiveMultipleMetastoreCheck extends AbstractCheckDescriptor {
    */
   @Override
   public boolean isApplicable(PrereqCheckRequest request) throws AmbariException {
-    if (!super.isApplicable(request)) {
-      return false;
-    }
-
-    final Cluster cluster = clustersProvider.get().getCluster(request.getClusterName());
-    Map<String, Service> services = cluster.getServices();
-    if (!services.containsKey("HIVE")) {
-      return false;
-    }
-
-    return true;
+    return super.isApplicable(request, Arrays.asList("HIVE"), true);
   }
 
   /**

http://git-wip-us.apache.org/repos/asf/ambari/blob/df0d238a/ambari-server/src/main/java/org/apache/ambari/server/checks/HostsHeartbeatCheck.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/java/org/apache/ambari/server/checks/HostsHeartbeatCheck.java b/ambari-server/src/main/java/org/apache/ambari/server/checks/HostsHeartbeatCheck.java
index 6076a32..c9a352e 100644
--- a/ambari-server/src/main/java/org/apache/ambari/server/checks/HostsHeartbeatCheck.java
+++ b/ambari-server/src/main/java/org/apache/ambari/server/checks/HostsHeartbeatCheck.java
@@ -34,7 +34,7 @@ import com.google.inject.Singleton;
  * Checks that all hosts are either in maintenance mode or heartbeating with the server.
  */
 @Singleton
-@UpgradeCheck(group = UpgradeCheckGroup.LIVELINESS, order = 1.0f)
+@UpgradeCheck(group = UpgradeCheckGroup.LIVELINESS, order = 1.0f, required = true)
 public class HostsHeartbeatCheck extends AbstractCheckDescriptor {
 
   /**

http://git-wip-us.apache.org/repos/asf/ambari/blob/df0d238a/ambari-server/src/main/java/org/apache/ambari/server/checks/HostsMasterMaintenanceCheck.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/java/org/apache/ambari/server/checks/HostsMasterMaintenanceCheck.java b/ambari-server/src/main/java/org/apache/ambari/server/checks/HostsMasterMaintenanceCheck.java
index b1b6b68..39ab39f 100644
--- a/ambari-server/src/main/java/org/apache/ambari/server/checks/HostsMasterMaintenanceCheck.java
+++ b/ambari-server/src/main/java/org/apache/ambari/server/checks/HostsMasterMaintenanceCheck.java
@@ -40,7 +40,7 @@ import com.google.inject.Singleton;
  * Checks that all hosts in maintenance state do not have master components.
  */
 @Singleton
-@UpgradeCheck(group = UpgradeCheckGroup.MAINTENANCE_MODE, order = 1.0f)
+@UpgradeCheck(group = UpgradeCheckGroup.MAINTENANCE_MODE, order = 1.0f, required = true)
 public class HostsMasterMaintenanceCheck extends AbstractCheckDescriptor {
 
   static final String KEY_NO_UPGRADE_NAME = "no_upgrade_name";
@@ -54,15 +54,6 @@ public class HostsMasterMaintenanceCheck extends AbstractCheckDescriptor {
   }
 
   @Override
-  public boolean isApplicable(PrereqCheckRequest request) throws AmbariException {
-    if (!super.isApplicable(request)) {
-      return false;
-    }
-
-    return request.getRepositoryVersion() != null;
-  }
-
-  @Override
   public void perform(PrerequisiteCheck prerequisiteCheck, PrereqCheckRequest request) throws AmbariException {
     final String clusterName = request.getClusterName();
     final Cluster cluster = clustersProvider.get().getCluster(clusterName);

http://git-wip-us.apache.org/repos/asf/ambari/blob/df0d238a/ambari-server/src/main/java/org/apache/ambari/server/checks/HostsRepositoryVersionCheck.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/java/org/apache/ambari/server/checks/HostsRepositoryVersionCheck.java b/ambari-server/src/main/java/org/apache/ambari/server/checks/HostsRepositoryVersionCheck.java
index 6ebf8e1..3b965b7 100644
--- a/ambari-server/src/main/java/org/apache/ambari/server/checks/HostsRepositoryVersionCheck.java
+++ b/ambari-server/src/main/java/org/apache/ambari/server/checks/HostsRepositoryVersionCheck.java
@@ -38,7 +38,7 @@ import com.google.inject.Singleton;
  * Checks that all hosts have particular repository version.
  */
 @Singleton
-@UpgradeCheck(group = UpgradeCheckGroup.REPOSITORY_VERSION)
+@UpgradeCheck(group = UpgradeCheckGroup.REPOSITORY_VERSION, required = true)
 public class HostsRepositoryVersionCheck extends AbstractCheckDescriptor {
 
   static final String KEY_NO_REPO_VERSION = "no_repo_version";
@@ -51,15 +51,6 @@ public class HostsRepositoryVersionCheck extends AbstractCheckDescriptor {
   }
 
   @Override
-  public boolean isApplicable(PrereqCheckRequest request) throws AmbariException {
-    if (!super.isApplicable(request)) {
-      return false;
-    }
-
-    return request.getRepositoryVersion() != null;
-  }
-
-  @Override
   public void perform(PrerequisiteCheck prerequisiteCheck, PrereqCheckRequest request) throws AmbariException {
     final String clusterName = request.getClusterName();
     final Cluster cluster = clustersProvider.get().getCluster(clusterName);

http://git-wip-us.apache.org/repos/asf/ambari/blob/df0d238a/ambari-server/src/main/java/org/apache/ambari/server/checks/MapReduce2JobHistoryStatePreservingCheck.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/java/org/apache/ambari/server/checks/MapReduce2JobHistoryStatePreservingCheck.java b/ambari-server/src/main/java/org/apache/ambari/server/checks/MapReduce2JobHistoryStatePreservingCheck.java
index 5f02c4f..af134d8 100644
--- a/ambari-server/src/main/java/org/apache/ambari/server/checks/MapReduce2JobHistoryStatePreservingCheck.java
+++ b/ambari-server/src/main/java/org/apache/ambari/server/checks/MapReduce2JobHistoryStatePreservingCheck.java
@@ -28,6 +28,7 @@ import org.apache.ambari.server.utils.VersionUtils;
 import org.apache.commons.lang.StringUtils;
 
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.List;
 import java.util.Map;
 
@@ -87,15 +88,11 @@ public class MapReduce2JobHistoryStatePreservingCheck extends AbstractCheckDescr
    */
   @Override
   public boolean isApplicable(PrereqCheckRequest request) throws AmbariException {
-    if (!super.isApplicable(request)) {
+    if (!super.isApplicable(request, Arrays.asList("MAPREDUCE2"), true)) {
       return false;
     }
 
     final Cluster cluster = clustersProvider.get().getCluster(request.getClusterName());
-    Map<String, Service> services = cluster.getServices();
-    if (!services.containsKey("MAPREDUCE2")) {
-      return false;
-    }
 
     // Applicable only if stack not defined in MinimumApplicableStackVersion, or
     // version equals or exceeds the enumerated version.

http://git-wip-us.apache.org/repos/asf/ambari/blob/df0d238a/ambari-server/src/main/java/org/apache/ambari/server/checks/SecondaryNamenodeDeletedCheck.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/java/org/apache/ambari/server/checks/SecondaryNamenodeDeletedCheck.java b/ambari-server/src/main/java/org/apache/ambari/server/checks/SecondaryNamenodeDeletedCheck.java
index 2086b67..d7c27d7 100644
--- a/ambari-server/src/main/java/org/apache/ambari/server/checks/SecondaryNamenodeDeletedCheck.java
+++ b/ambari-server/src/main/java/org/apache/ambari/server/checks/SecondaryNamenodeDeletedCheck.java
@@ -17,6 +17,7 @@
  */
 package org.apache.ambari.server.checks;
 
+import java.util.Arrays;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
@@ -53,14 +54,7 @@ public class SecondaryNamenodeDeletedCheck extends AbstractCheckDescriptor {
 
   @Override
   public boolean isApplicable(PrereqCheckRequest request) throws AmbariException {
-    if (!super.isApplicable(request)) {
-      return false;
-    }
-
-    final Cluster cluster = clustersProvider.get().getCluster(request.getClusterName());
-    try {
-      cluster.getService("HDFS");
-    } catch (ServiceNotFoundException ex) {
+    if (!super.isApplicable(request, Arrays.asList("HDFS"), true)) {
       return false;
     }
 

http://git-wip-us.apache.org/repos/asf/ambari/blob/df0d238a/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesMaintenanceModeCheck.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesMaintenanceModeCheck.java b/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesMaintenanceModeCheck.java
index 5108afd..8d578d8 100644
--- a/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesMaintenanceModeCheck.java
+++ b/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesMaintenanceModeCheck.java
@@ -24,7 +24,6 @@ import org.apache.ambari.server.controller.PrereqCheckRequest;
 import org.apache.ambari.server.state.Cluster;
 import org.apache.ambari.server.state.MaintenanceState;
 import org.apache.ambari.server.state.Service;
-import org.apache.ambari.server.state.State;
 import org.apache.ambari.server.state.stack.PrereqCheckStatus;
 import org.apache.ambari.server.state.stack.PrerequisiteCheck;
 
@@ -34,7 +33,7 @@ import com.google.inject.Singleton;
  * Checks that services are in the maintenance mode.
  */
 @Singleton
-@UpgradeCheck(group = UpgradeCheckGroup.MAINTENANCE_MODE, order = 2.0f)
+@UpgradeCheck(group = UpgradeCheckGroup.MAINTENANCE_MODE, order = 2.0f, required = true)
 public class ServicesMaintenanceModeCheck extends AbstractCheckDescriptor {
 
   /**

http://git-wip-us.apache.org/repos/asf/ambari/blob/df0d238a/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesMapReduceDistributedCacheCheck.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesMapReduceDistributedCacheCheck.java b/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesMapReduceDistributedCacheCheck.java
index be5d11a..2359919 100644
--- a/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesMapReduceDistributedCacheCheck.java
+++ b/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesMapReduceDistributedCacheCheck.java
@@ -18,6 +18,7 @@
 package org.apache.ambari.server.checks;
 
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.List;
 import java.util.Map;
 
@@ -48,14 +49,7 @@ public class ServicesMapReduceDistributedCacheCheck extends AbstractCheckDescrip
   public boolean isApplicable(PrereqCheckRequest request)
     throws AmbariException {
 
-    if (!super.isApplicable(request)) {
-      return false;
-    }
-
-    final Cluster cluster = clustersProvider.get().getCluster(request.getClusterName());
-    try {
-      cluster.getService("YARN");
-    } catch (ServiceNotFoundException ex) {
+    if (!super.isApplicable(request, Arrays.asList("YARN"), true)) {
       return false;
     }
 

http://git-wip-us.apache.org/repos/asf/ambari/blob/df0d238a/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesNamenodeHighAvailabilityCheck.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesNamenodeHighAvailabilityCheck.java b/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesNamenodeHighAvailabilityCheck.java
index d92f12d..44e183d 100644
--- a/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesNamenodeHighAvailabilityCheck.java
+++ b/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesNamenodeHighAvailabilityCheck.java
@@ -17,6 +17,7 @@
  */
 package org.apache.ambari.server.checks;
 
+import java.util.Arrays;
 import java.util.Map;
 
 import org.apache.ambari.server.AmbariException;
@@ -46,17 +47,7 @@ public class ServicesNamenodeHighAvailabilityCheck extends AbstractCheckDescript
 
   @Override
   public boolean isApplicable(PrereqCheckRequest request) throws AmbariException {
-    if (!super.isApplicable(request)) {
-      return false;
-    }
-
-    final Cluster cluster = clustersProvider.get().getCluster(request.getClusterName());
-    try {
-      cluster.getService("HDFS");
-    } catch (ServiceNotFoundException ex) {
-      return false;
-    }
-    return true;
+    return super.isApplicable(request, Arrays.asList("HDFS"), true);
   }
 
   @Override

http://git-wip-us.apache.org/repos/asf/ambari/blob/df0d238a/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesNamenodeTruncateCheck.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesNamenodeTruncateCheck.java b/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesNamenodeTruncateCheck.java
index 51369c9..3761d99 100644
--- a/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesNamenodeTruncateCheck.java
+++ b/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesNamenodeTruncateCheck.java
@@ -28,6 +28,8 @@ import org.apache.ambari.server.utils.VersionUtils;
 
 import com.google.inject.Singleton;
 
+import java.util.Arrays;
+
 /**
  * Checks that namenode high availability is enabled.
  */
@@ -44,14 +46,7 @@ public class ServicesNamenodeTruncateCheck extends AbstractCheckDescriptor {
 
   @Override
   public boolean isApplicable(PrereqCheckRequest request) throws AmbariException {
-    if (!super.isApplicable(request)) {
-      return false;
-    }
-
-    final Cluster cluster = clustersProvider.get().getCluster(request.getClusterName());
-    try {
-      cluster.getService("HDFS");
-    } catch (ServiceNotFoundException ex) {
+    if (!super.isApplicable(request, Arrays.asList("HDFS"), true)) {
       return false;
     }
 

http://git-wip-us.apache.org/repos/asf/ambari/blob/df0d238a/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesTezDistributedCacheCheck.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesTezDistributedCacheCheck.java b/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesTezDistributedCacheCheck.java
index 68a7103..70a9b1b 100644
--- a/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesTezDistributedCacheCheck.java
+++ b/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesTezDistributedCacheCheck.java
@@ -18,6 +18,7 @@
 package org.apache.ambari.server.checks;
 
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.List;
 import java.util.Map;
 
@@ -48,14 +49,7 @@ public class ServicesTezDistributedCacheCheck extends AbstractCheckDescriptor {
 
   @Override
   public boolean isApplicable(PrereqCheckRequest request) throws AmbariException {
-    if (!super.isApplicable(request)) {
-      return false;
-    }
-
-    final Cluster cluster = clustersProvider.get().getCluster(request.getClusterName());
-    try {
-      cluster.getService("TEZ");
-    } catch (ServiceNotFoundException ex) {
+    if (!super.isApplicable(request, Arrays.asList("TEZ"), true)) {
       return false;
     }
 

http://git-wip-us.apache.org/repos/asf/ambari/blob/df0d238a/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesUpCheck.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesUpCheck.java b/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesUpCheck.java
index 70b8884..ea8569c 100644
--- a/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesUpCheck.java
+++ b/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesUpCheck.java
@@ -44,7 +44,7 @@ import com.google.inject.Singleton;
  * Checks that services are up.
  */
 @Singleton
-@UpgradeCheck(group = UpgradeCheckGroup.LIVELINESS, order = 2.0f)
+@UpgradeCheck(group = UpgradeCheckGroup.LIVELINESS, order = 2.0f, required = true)
 public class ServicesUpCheck extends AbstractCheckDescriptor {
 
   private static final float SLAVE_THRESHOLD = 0.5f;

http://git-wip-us.apache.org/repos/asf/ambari/blob/df0d238a/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesYarnWorkPreservingCheck.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesYarnWorkPreservingCheck.java b/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesYarnWorkPreservingCheck.java
index a0b2b59..062c11f 100644
--- a/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesYarnWorkPreservingCheck.java
+++ b/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesYarnWorkPreservingCheck.java
@@ -27,6 +27,8 @@ import org.apache.commons.lang.BooleanUtils;
 
 import com.google.inject.Singleton;
 
+import java.util.Arrays;
+
 /**
  * Checks that YARN has work-preserving restart enabled.
  */
@@ -46,17 +48,7 @@ public class ServicesYarnWorkPreservingCheck extends AbstractCheckDescriptor {
    */
   @Override
   public boolean isApplicable(PrereqCheckRequest request) throws AmbariException {
-    if (!super.isApplicable(request)) {
-      return false;
-    }
-
-    final Cluster cluster = clustersProvider.get().getCluster(request.getClusterName());
-    try {
-      cluster.getService("YARN");
-    } catch (ServiceNotFoundException ex) {
-      return false;
-    }
-    return true;
+    return super.isApplicable(request, Arrays.asList("YARN"), true);
   }
 
   /**

http://git-wip-us.apache.org/repos/asf/ambari/blob/df0d238a/ambari-server/src/main/java/org/apache/ambari/server/checks/UpgradeCheck.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/java/org/apache/ambari/server/checks/UpgradeCheck.java b/ambari-server/src/main/java/org/apache/ambari/server/checks/UpgradeCheck.java
index 9fa8916..9e43560 100644
--- a/ambari-server/src/main/java/org/apache/ambari/server/checks/UpgradeCheck.java
+++ b/ambari-server/src/main/java/org/apache/ambari/server/checks/UpgradeCheck.java
@@ -55,4 +55,12 @@ public @interface UpgradeCheck {
    * @return the order, or {@code 1.0f} if not specified.
    */
   float order() default 1.0f;
+
+  /**
+   * Gets whether the pre-upgrade check is required.
+   * By default, a pre-upgrade check needs to be declared in the upgrade pack. This flag will override that setting.
+   *
+   * @return  flag state, or {@code true} if not specified
+   */
+  boolean required() default false;
 }

http://git-wip-us.apache.org/repos/asf/ambari/blob/df0d238a/ambari-server/src/main/java/org/apache/ambari/server/checks/UpgradeCheckRegistry.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/java/org/apache/ambari/server/checks/UpgradeCheckRegistry.java b/ambari-server/src/main/java/org/apache/ambari/server/checks/UpgradeCheckRegistry.java
index 8be572c..4ed345c 100644
--- a/ambari-server/src/main/java/org/apache/ambari/server/checks/UpgradeCheckRegistry.java
+++ b/ambari-server/src/main/java/org/apache/ambari/server/checks/UpgradeCheckRegistry.java
@@ -24,6 +24,7 @@ import java.util.Set;
 import java.util.TreeSet;
 
 import com.google.inject.Singleton;
+import org.apache.ambari.server.state.stack.UpgradePack;
 
 /**
  * The {@link UpgradeCheckRegistry} contains the ordered list of all pre-upgrade
@@ -59,6 +60,24 @@ public class UpgradeCheckRegistry {
   }
 
   /**
+   * Gets an ordered and filtered list of the upgrade checks.
+   * @param upgradePack Upgrade pack object with the list of required checks to be included
+   * @return
+   */
+  public List<AbstractCheckDescriptor> getFilteredUpgradeChecks(UpgradePack upgradePack){
+    List<String> prerequisiteChecks = upgradePack.getPrerequisiteChecks();
+    List<AbstractCheckDescriptor> resultCheckDescriptor = new ArrayList<AbstractCheckDescriptor>();
+    for (AbstractCheckDescriptor descriptor: m_upgradeChecks){
+      if (descriptor.isRequired()){
+        resultCheckDescriptor.add(descriptor);
+      } else if (prerequisiteChecks.contains(descriptor.getClass().getName())){
+        resultCheckDescriptor.add(descriptor);
+      }
+    }
+    return resultCheckDescriptor;
+  }
+
+  /**
    * THe {@link PreUpgradeCheckComparator} class is used to compare
    * {@link AbstractCheckDescriptor} based on their {@link UpgradeCheck}
    * annotations.

http://git-wip-us.apache.org/repos/asf/ambari/blob/df0d238a/ambari-server/src/main/java/org/apache/ambari/server/checks/YarnRMHighAvailabilityCheck.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/java/org/apache/ambari/server/checks/YarnRMHighAvailabilityCheck.java b/ambari-server/src/main/java/org/apache/ambari/server/checks/YarnRMHighAvailabilityCheck.java
index bf25f9f..9f3bd6e 100644
--- a/ambari-server/src/main/java/org/apache/ambari/server/checks/YarnRMHighAvailabilityCheck.java
+++ b/ambari-server/src/main/java/org/apache/ambari/server/checks/YarnRMHighAvailabilityCheck.java
@@ -17,6 +17,7 @@
  */
 package org.apache.ambari.server.checks;
 
+import java.util.Arrays;
 import java.util.Map;
 
 import org.apache.ambari.server.AmbariException;
@@ -49,17 +50,7 @@ public class YarnRMHighAvailabilityCheck extends AbstractCheckDescriptor {
    */
   @Override
   public boolean isApplicable(PrereqCheckRequest request) throws AmbariException {
-    if (!super.isApplicable(request)) {
-      return false;
-    }
-
-    final Cluster cluster = clustersProvider.get().getCluster(request.getClusterName());
-    Map<String, Service> services = cluster.getServices();
-    if (!services.containsKey("YARN")) {
-      return false;
-    }
-
-    return true;
+    return super.isApplicable(request, Arrays.asList("YARN"), true);
   }
 
   /**

http://git-wip-us.apache.org/repos/asf/ambari/blob/df0d238a/ambari-server/src/main/java/org/apache/ambari/server/checks/YarnTimelineServerStatePreservingCheck.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/java/org/apache/ambari/server/checks/YarnTimelineServerStatePreservingCheck.java b/ambari-server/src/main/java/org/apache/ambari/server/checks/YarnTimelineServerStatePreservingCheck.java
index eca0967..03528c2 100644
--- a/ambari-server/src/main/java/org/apache/ambari/server/checks/YarnTimelineServerStatePreservingCheck.java
+++ b/ambari-server/src/main/java/org/apache/ambari/server/checks/YarnTimelineServerStatePreservingCheck.java
@@ -17,6 +17,7 @@
  */
 package org.apache.ambari.server.checks;
 
+import java.util.Arrays;
 import java.util.Map;
 
 import org.apache.ambari.server.AmbariException;
@@ -81,15 +82,11 @@ public class YarnTimelineServerStatePreservingCheck extends AbstractCheckDescrip
    */
   @Override
   public boolean isApplicable(PrereqCheckRequest request) throws AmbariException {
-    if (!super.isApplicable(request)) {
+    if (!super.isApplicable(request, Arrays.asList("YARN"), true)) {
       return false;
     }
 
     final Cluster cluster = clustersProvider.get().getCluster(request.getClusterName());
-    Map<String, Service> services = cluster.getServices();
-    if (!services.containsKey("YARN")) {
-      return false;
-    }
 
     // Applicable only if stack not defined in MinimumApplicableStackVersion, or
     // version equals or exceeds the enumerated version.

http://git-wip-us.apache.org/repos/asf/ambari/blob/df0d238a/ambari-server/src/main/java/org/apache/ambari/server/controller/internal/PreUpgradeCheckResourceProvider.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/java/org/apache/ambari/server/controller/internal/PreUpgradeCheckResourceProvider.java b/ambari-server/src/main/java/org/apache/ambari/server/controller/internal/PreUpgradeCheckResourceProvider.java
index 65b5794..93093d2 100644
--- a/ambari-server/src/main/java/org/apache/ambari/server/controller/internal/PreUpgradeCheckResourceProvider.java
+++ b/ambari-server/src/main/java/org/apache/ambari/server/controller/internal/PreUpgradeCheckResourceProvider.java
@@ -26,6 +26,7 @@ import java.util.Set;
 
 import org.apache.ambari.server.AmbariException;
 import org.apache.ambari.server.StaticallyInject;
+import org.apache.ambari.server.api.services.AmbariMetaInfo;
 import org.apache.ambari.server.checks.AbstractCheckDescriptor;
 import org.apache.ambari.server.checks.UpgradeCheckRegistry;
 import org.apache.ambari.server.controller.AmbariManagementController;
@@ -44,11 +45,14 @@ import org.apache.ambari.server.orm.entities.RepositoryVersionEntity;
 import org.apache.ambari.server.state.CheckHelper;
 import org.apache.ambari.server.state.Cluster;
 import org.apache.ambari.server.state.Clusters;
+import org.apache.ambari.server.state.UpgradeHelper;
 import org.apache.ambari.server.state.stack.PrerequisiteCheck;
 
 import com.google.common.collect.Sets;
 import com.google.inject.Inject;
 import com.google.inject.Provider;
+import org.apache.ambari.server.state.stack.UpgradePack;
+import org.apache.ambari.server.state.stack.upgrade.Direction;
 import org.apache.ambari.server.state.stack.upgrade.UpgradeType;
 
 /**
@@ -79,6 +83,9 @@ public class PreUpgradeCheckResourceProvider extends ReadOnlyResourceProvider {
   @Inject
   private static UpgradeCheckRegistry upgradeCheckRegistry;
 
+  @Inject
+  private static Provider<UpgradeHelper> upgradeHelper;
+
   private static Set<String> pkPropertyIds = Collections.singleton(UPGRADE_CHECK_ID_PROPERTY_ID);
 
   public static Set<String> propertyIds = Sets.newHashSet(
@@ -116,7 +123,7 @@ public class PreUpgradeCheckResourceProvider extends ReadOnlyResourceProvider {
 
   @Override
   public Set<Resource> getResources(Request request, Predicate predicate) throws SystemException, UnsupportedPropertyException,
-      NoSuchResourceException, NoSuchParentResourceException {
+    NoSuchResourceException, NoSuchParentResourceException {
 
     final Set<Resource> resources = new HashSet<Resource>();
     final Set<String> requestedIds = getRequestPropertyIds(request, predicate);
@@ -136,6 +143,7 @@ public class PreUpgradeCheckResourceProvider extends ReadOnlyResourceProvider {
       }
 
       String stackName = cluster.getCurrentStackVersion().getStackName();
+      String sourceStackVersion = cluster.getCurrentStackVersion().getStackVersion();
 
       final PrereqCheckRequest upgradeCheckRequest = new PrereqCheckRequest(clusterName, upgradeType);
       upgradeCheckRequest.setSourceStackId(cluster.getCurrentStackVersion());
@@ -143,14 +151,30 @@ public class PreUpgradeCheckResourceProvider extends ReadOnlyResourceProvider {
       if (propertyMap.containsKey(UPGRADE_CHECK_REPOSITORY_VERSION_PROPERTY_ID)) {
         String repositoryVersionId = propertyMap.get(UPGRADE_CHECK_REPOSITORY_VERSION_PROPERTY_ID).toString();
         RepositoryVersionEntity repositoryVersionEntity = repositoryVersionDAO.findByStackNameAndVersion(stackName, repositoryVersionId);
-
         // set some required properties on the check request
         upgradeCheckRequest.setRepositoryVersion(repositoryVersionId);
         upgradeCheckRequest.setTargetStackId(repositoryVersionEntity.getStackId());
       }
 
+      //ambariMetaInfo.getStack(stackName, cluster.getCurrentStackVersion().getStackVersion()).getUpgradePacks()
       // TODO AMBARI-12698, filter the upgrade checks to run based on the stack and upgrade type, or the upgrade pack.
-      List<AbstractCheckDescriptor> upgradeChecksToRun = upgradeCheckRegistry.getUpgradeChecks();
+      UpgradePack upgradePack = null;
+      try{
+        // Hint: PreChecks currently executing only before UPGRADE direction
+        upgradePack = upgradeHelper.get().suggestUpgradePack(clusterName, sourceStackVersion,
+            upgradeCheckRequest.getRepositoryVersion(), Direction.UPGRADE, upgradeType);
+      } catch (AmbariException e) {
+        throw new SystemException(e.getMessage(), e);
+      }
+
+      if (upgradePack == null) {
+        throw new SystemException(String.format("Upgrade pack not found for the target repository version %s",
+          upgradeCheckRequest.getRepositoryVersion()));
+      }
+
+      // ToDo: properly handle exceptions, i.e. create fake check with error description
+
+      List<AbstractCheckDescriptor> upgradeChecksToRun = upgradeCheckRegistry.getFilteredUpgradeChecks(upgradePack);
 
       for (PrerequisiteCheck prerequisiteCheck : checkHelper.performChecks(upgradeCheckRequest, upgradeChecksToRun)) {
         final Resource resource = new ResourceImpl(Resource.Type.PreUpgradeCheck);

http://git-wip-us.apache.org/repos/asf/ambari/blob/df0d238a/ambari-server/src/main/java/org/apache/ambari/server/controller/internal/UpgradeResourceProvider.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/java/org/apache/ambari/server/controller/internal/UpgradeResourceProvider.java b/ambari-server/src/main/java/org/apache/ambari/server/controller/internal/UpgradeResourceProvider.java
index 2d41673..8f4870c 100644
--- a/ambari-server/src/main/java/org/apache/ambari/server/controller/internal/UpgradeResourceProvider.java
+++ b/ambari-server/src/main/java/org/apache/ambari/server/controller/internal/UpgradeResourceProvider.java
@@ -470,55 +470,7 @@ public class UpgradeResourceProvider extends AbstractControllerResourceProvider
       throw new AmbariException(String.format("%s is required", UPGRADE_VERSION));
     }
 
-    Cluster cluster = getManagementController().getClusters().getCluster(clusterName);
-
-    // !!! find upgrade packs based on current stack. This is where to upgrade
-    // from.
-    StackId stack = cluster.getCurrentStackVersion();
-
-    String repoVersion = version;
-
-    if (direction.isDowngrade() && null != versionForUpgradePack) {
-      repoVersion = versionForUpgradePack;
-    }
-
-    RepositoryVersionEntity versionEntity = s_repoVersionDAO.findByStackNameAndVersion(stack.getStackName(), repoVersion);
-
-    if (null == versionEntity) {
-      throw new AmbariException(String.format("Repository version %s was not found", repoVersion));
-    }
-
-    Map<String, UpgradePack> packs = s_metaProvider.get().getUpgradePacks(stack.getStackName(),
-            stack.getStackVersion());
-
-    UpgradePack pack = null;
-    if (preferredUpgradePackName != null && !preferredUpgradePackName.isEmpty() && packs.containsKey(preferredUpgradePackName)) {
-      pack = packs.get(preferredUpgradePackName);
-    }
-
-    if (null == pack) {
-      // !!! in case there is an upgrade pack that doesn't match the name
-      String repoStackId = versionEntity.getStackId().getStackId();
-      for (UpgradePack upgradePack : packs.values()) {
-        if (null != upgradePack.getTargetStack() && upgradePack.getTargetStack().equals(repoStackId) && upgradeType == upgradePack.getType()) {
-          if (null == pack) {
-            pack = upgradePack;
-          } else {
-            throw new AmbariException(
-                String.format("Unable to perform %s. Found multiple upgrade packs for type %s and target version %s",
-                    direction.getText(false), upgradeType.toString(), repoVersion));
-          }
-        }
-      }
-    }
-
-    if (null == pack) {
-      throw new AmbariException(
-          String.format("Unable to perform %s. Could not locate %s upgrade pack for version %s",
-              direction.getText(false), upgradeType.toString(), repoVersion));
-    }
-
-    return pack;
+    return s_upgradeHelper.suggestUpgradePack(clusterName, versionForUpgradePack, version, direction, upgradeType);
   }
 
   /**
@@ -633,8 +585,7 @@ public class UpgradeResourceProvider extends AbstractControllerResourceProvider
     // TODO: for cross-stack upgrade, merge a new config upgrade pack from all
     // target stacks involved into upgrade and pass it into method
     ConfigUpgradePack configUpgradePack = s_metaProvider.get().getConfigUpgradePack(
-            targetStackId.getStackName(), targetStackId.getStackVersion());
-
+        targetStackId.getStackName(), targetStackId.getStackVersion());
     for (UpgradeGroupHolder group : groups) {
       UpgradeGroupEntity groupEntity = new UpgradeGroupEntity();
       groupEntity.setName(group.name);
@@ -1258,13 +1209,13 @@ public class UpgradeResourceProvider extends AbstractControllerResourceProvider
     entity.setStageId(Long.valueOf(stageId));
 
     stage.addServerActionCommand(task.getImplementationClass(),
-            getManagementController().getAuthName(),
-            Role.AMBARI_SERVER_ACTION,
-            RoleCommand.EXECUTE,
-            cluster.getClusterName(),
-            new ServiceComponentHostServerActionEvent(null,
-                    System.currentTimeMillis()),
-            commandParams, itemDetail, null, Integer.valueOf(1200), allowRetry);
+        getManagementController().getAuthName(),
+        Role.AMBARI_SERVER_ACTION,
+        RoleCommand.EXECUTE,
+        cluster.getClusterName(),
+        new ServiceComponentHostServerActionEvent(null,
+            System.currentTimeMillis()),
+        commandParams, itemDetail, null, Integer.valueOf(1200), allowRetry);
 
     request.addStages(Collections.singletonList(stage));
   }

http://git-wip-us.apache.org/repos/asf/ambari/blob/df0d238a/ambari-server/src/main/java/org/apache/ambari/server/state/UpgradeHelper.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/java/org/apache/ambari/server/state/UpgradeHelper.java b/ambari-server/src/main/java/org/apache/ambari/server/state/UpgradeHelper.java
index 3acee63..ed9b3a7 100644
--- a/ambari-server/src/main/java/org/apache/ambari/server/state/UpgradeHelper.java
+++ b/ambari-server/src/main/java/org/apache/ambari/server/state/UpgradeHelper.java
@@ -43,11 +43,12 @@ import org.apache.ambari.server.controller.spi.UnsupportedPropertyException;
 import org.apache.ambari.server.controller.utilities.ClusterControllerHelper;
 import org.apache.ambari.server.controller.utilities.PredicateBuilder;
 import org.apache.ambari.server.controller.utilities.PropertyHelper;
+import org.apache.ambari.server.orm.dao.RepositoryVersionDAO;
+import org.apache.ambari.server.orm.entities.RepositoryVersionEntity;
 import org.apache.ambari.server.stack.HostsType;
 import org.apache.ambari.server.stack.MasterHostResolver;
 import org.apache.ambari.server.state.stack.UpgradePack;
 import org.apache.ambari.server.state.stack.UpgradePack.ProcessingComponent;
-import org.apache.ambari.server.state.stack.upgrade.ConfigureTask;
 import org.apache.ambari.server.state.stack.upgrade.Direction;
 import org.apache.ambari.server.state.stack.upgrade.Grouping;
 import org.apache.ambari.server.state.stack.upgrade.ManualTask;
@@ -180,6 +181,68 @@ public class UpgradeHelper {
   @Inject
   private Provider<AmbariMetaInfo> m_ambariMetaInfo;
 
+  @Inject
+  private Provider<Clusters> clusters;
+
+  @Inject
+  private Provider<RepositoryVersionDAO> s_repoVersionDAO;
+
+
+  /**
+   * Get right Upgrade Pack, depends on stack, direction and upgrade type information
+   * @param clusterName The name of the cluster
+   * @param upgradeFromVersion Current stack version
+   * @param upgradeToVersion Target stack version
+   * @param direction {@code Direction} of the upgrade
+   * @param upgradeType The {@code UpgradeType}
+   * @return {@code UpgradeType} object
+   * @throws AmbariException
+   */
+  public UpgradePack suggestUpgradePack(String clusterName, String upgradeFromVersion, String upgradeToVersion,
+    Direction direction, UpgradeType upgradeType) throws AmbariException {
+
+    // !!! find upgrade packs based on current stack. This is where to upgrade from
+    Cluster cluster = clusters.get().getCluster(clusterName);
+    StackId stack =  cluster.getCurrentStackVersion();
+
+    String repoVersion = upgradeToVersion;
+
+    // ToDo: AMBARI-12706. Here we need to check, how this would work with SWU Downgrade
+    if (direction.isDowngrade() && null != upgradeFromVersion) {
+      repoVersion = upgradeFromVersion;
+    }
+
+    RepositoryVersionEntity versionEntity = s_repoVersionDAO.get().findByStackNameAndVersion(stack.getStackName(), repoVersion);
+
+    if (versionEntity == null) {
+      throw new AmbariException(String.format("Repository version %s was not found", repoVersion));
+    }
+
+    Map<String, UpgradePack> packs = m_ambariMetaInfo.get().getUpgradePacks(stack.getStackName(), stack.getStackVersion());
+    UpgradePack pack = null;
+
+    String repoStackId = versionEntity.getStackId().getStackId();
+    for (UpgradePack upgradePack : packs.values()) {
+      if (upgradePack.getTargetStack() != null && upgradePack.getTargetStack().equals(repoStackId) &&
+           upgradeType == upgradePack.getType()) {
+        if (pack == null) {
+          pack = upgradePack;
+        } else {
+          throw new AmbariException(
+            String.format("Found multiple upgrade packs for type %s and target version %s",
+              upgradeType.toString(), repoVersion));
+        }
+      }
+    }
+
+    if (pack == null) {
+      throw new AmbariException(String.format("No upgrade pack found for type %s and target version %s",
+        upgradeType.toString(),repoVersion));
+    }
+
+   return pack;
+  }
+
 
   /**
    * Generates a list of UpgradeGroupHolder items that are used to execute either

http://git-wip-us.apache.org/repos/asf/ambari/blob/df0d238a/ambari-server/src/main/java/org/apache/ambari/server/state/stack/UpgradePack.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/java/org/apache/ambari/server/state/stack/UpgradePack.java b/ambari-server/src/main/java/org/apache/ambari/server/state/stack/UpgradePack.java
index e57bfef..6ae0a15 100644
--- a/ambari-server/src/main/java/org/apache/ambari/server/state/stack/UpgradePack.java
+++ b/ambari-server/src/main/java/org/apache/ambari/server/state/stack/UpgradePack.java
@@ -64,6 +64,10 @@ public class UpgradePack {
   @XmlElement(name="group")
   private List<Grouping> groups;
 
+  @XmlElementWrapper(name="prerequisite-checks")
+  @XmlElement(name="check", type=String.class)
+  private List<String> prerequisiteChecks = new ArrayList<String>();
+
   /**
    * In the case of a rolling upgrade, will specify processing logic for a particular component.
    * NonRolling upgrades are simpler so the "processing" is embedded into the  group's "type", which is a function like
@@ -109,6 +113,13 @@ public class UpgradePack {
   }
 
   /**
+   * @return the preCheck name, e.g. "CheckDescription"
+   */
+  public List<String> getPrerequisiteChecks() {
+    return new ArrayList<String>(prerequisiteChecks);
+  }
+
+  /**
    * Gets the groups defined for the upgrade pack.  If a direction is defined
    * for a group, it must match the supplied direction to be returned
    * @param direction the direction to return the ordered groups

http://git-wip-us.apache.org/repos/asf/ambari/blob/df0d238a/ambari-server/src/main/resources/stacks/HDP/2.2/upgrades/nonrolling-upgrade-2.2.xml
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/resources/stacks/HDP/2.2/upgrades/nonrolling-upgrade-2.2.xml b/ambari-server/src/main/resources/stacks/HDP/2.2/upgrades/nonrolling-upgrade-2.2.xml
index e95aabc..2f6840f 100644
--- a/ambari-server/src/main/resources/stacks/HDP/2.2/upgrades/nonrolling-upgrade-2.2.xml
+++ b/ambari-server/src/main/resources/stacks/HDP/2.2/upgrades/nonrolling-upgrade-2.2.xml
@@ -19,8 +19,10 @@
 
 <upgrade xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
   <target>2.2.*.*</target>
+  <target-stack>HDP-2.2</target-stack>
   <type>NON_ROLLING</type>
-
+  <prechecks>
+  </prechecks>
   <order>
     <group xsi:type="cluster" name="PRE_CLUSTER" title="Prepare Upgrade">
       <skippable>true</skippable>

http://git-wip-us.apache.org/repos/asf/ambari/blob/df0d238a/ambari-server/src/main/resources/stacks/HDP/2.2/upgrades/upgrade-2.2.xml
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/resources/stacks/HDP/2.2/upgrades/upgrade-2.2.xml b/ambari-server/src/main/resources/stacks/HDP/2.2/upgrades/upgrade-2.2.xml
index 9900d6a..c41e9b6 100644
--- a/ambari-server/src/main/resources/stacks/HDP/2.2/upgrades/upgrade-2.2.xml
+++ b/ambari-server/src/main/resources/stacks/HDP/2.2/upgrades/upgrade-2.2.xml
@@ -20,7 +20,18 @@
 <upgrade xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
   <target>2.2.*.*</target>
   <type>ROLLING</type>
-
+  <prerequisite-checks>
+    <check>org.apache.ambari.server.checks.HiveMultipleMetastoreCheck</check>
+    <check>org.apache.ambari.server.checks.MapReduce2JobHistoryStatePreservingCheck</check>
+    <check>org.apache.ambari.server.checks.SecondaryNamenodeDeletedCheck</check>
+    <check>org.apache.ambari.server.checks.ServicesMapReduceDistributedCacheCheck</check>
+    <check>org.apache.ambari.server.checks.ServicesNamenodeHighAvailabilityCheck</check>
+    <check>org.apache.ambari.server.checks.ServicesNamenodeTruncateCheck</check>
+    <check>org.apache.ambari.server.checks.ServicesTezDistributedCacheCheck</check>
+    <check>org.apache.ambari.server.checks.ServicesYarnWorkPreservingCheck</check>
+    <check>org.apache.ambari.server.checks.YarnRMHighAvailabilityCheck</check>
+    <check>org.apache.ambari.server.checks.YarnTimelineServerStatePreservingCheck</check>
+  </prerequisite-checks>
   <order>
     <group xsi:type="cluster" name="PRE_CLUSTER" title="Prepare Upgrade">
       <direction>UPGRADE</direction>

http://git-wip-us.apache.org/repos/asf/ambari/blob/df0d238a/ambari-server/src/main/resources/stacks/HDP/2.2/upgrades/upgrade-2.3.xml
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/resources/stacks/HDP/2.2/upgrades/upgrade-2.3.xml b/ambari-server/src/main/resources/stacks/HDP/2.2/upgrades/upgrade-2.3.xml
index 8397aaf..678d0f2 100644
--- a/ambari-server/src/main/resources/stacks/HDP/2.2/upgrades/upgrade-2.3.xml
+++ b/ambari-server/src/main/resources/stacks/HDP/2.2/upgrades/upgrade-2.3.xml
@@ -21,6 +21,18 @@
   <target>2.3.*.*</target>
   <target-stack>HDP-2.3</target-stack>
   <type>ROLLING</type>
+  <prerequisite-checks>
+    <check>org.apache.ambari.server.checks.HiveMultipleMetastoreCheck</check>
+    <check>org.apache.ambari.server.checks.MapReduce2JobHistoryStatePreservingCheck</check>
+    <check>org.apache.ambari.server.checks.SecondaryNamenodeDeletedCheck</check>
+    <check>org.apache.ambari.server.checks.ServicesMapReduceDistributedCacheCheck</check>
+    <check>org.apache.ambari.server.checks.ServicesNamenodeHighAvailabilityCheck</check>
+    <check>org.apache.ambari.server.checks.ServicesNamenodeTruncateCheck</check>
+    <check>org.apache.ambari.server.checks.ServicesTezDistributedCacheCheck</check>
+    <check>org.apache.ambari.server.checks.ServicesYarnWorkPreservingCheck</check>
+    <check>org.apache.ambari.server.checks.YarnRMHighAvailabilityCheck</check>
+    <check>org.apache.ambari.server.checks.YarnTimelineServerStatePreservingCheck</check>
+  </prerequisite-checks>
   <order>
     <group xsi:type="cluster" name="PRE_CLUSTER" title="Prepare Upgrade">
       <direction>UPGRADE</direction>

http://git-wip-us.apache.org/repos/asf/ambari/blob/df0d238a/ambari-server/src/main/resources/stacks/HDP/2.3/upgrades/upgrade-2.3.xml
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/resources/stacks/HDP/2.3/upgrades/upgrade-2.3.xml b/ambari-server/src/main/resources/stacks/HDP/2.3/upgrades/upgrade-2.3.xml
index c9bd438..4cd08a5 100644
--- a/ambari-server/src/main/resources/stacks/HDP/2.3/upgrades/upgrade-2.3.xml
+++ b/ambari-server/src/main/resources/stacks/HDP/2.3/upgrades/upgrade-2.3.xml
@@ -19,7 +19,20 @@
 
 <upgrade xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
   <target>2.3.*.*</target>
+  <target-stack>HDP-2.3</target-stack>
   <type>ROLLING</type>
+  <prerequisite-checks>
+    <check>org.apache.ambari.server.checks.HiveMultipleMetastoreCheck</check>
+    <check>org.apache.ambari.server.checks.MapReduce2JobHistoryStatePreservingCheck</check>
+    <check>org.apache.ambari.server.checks.SecondaryNamenodeDeletedCheck</check>
+    <check>org.apache.ambari.server.checks.ServicesMapReduceDistributedCacheCheck</check>
+    <check>org.apache.ambari.server.checks.ServicesNamenodeHighAvailabilityCheck</check>
+    <check>org.apache.ambari.server.checks.ServicesNamenodeTruncateCheck</check>
+    <check>org.apache.ambari.server.checks.ServicesTezDistributedCacheCheck</check>
+    <check>org.apache.ambari.server.checks.ServicesYarnWorkPreservingCheck</check>
+    <check>org.apache.ambari.server.checks.YarnRMHighAvailabilityCheck</check>
+    <check>org.apache.ambari.server.checks.YarnTimelineServerStatePreservingCheck</check>
+  </prerequisite-checks>
   <order>
     <group xsi:type="cluster" name="PRE_CLUSTER" title="Prepare Upgrade">
       <direction>UPGRADE</direction>

http://git-wip-us.apache.org/repos/asf/ambari/blob/df0d238a/ambari-server/src/test/java/org/apache/ambari/server/checks/ConfigurationMergeCheckTest.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/test/java/org/apache/ambari/server/checks/ConfigurationMergeCheckTest.java b/ambari-server/src/test/java/org/apache/ambari/server/checks/ConfigurationMergeCheckTest.java
index 2e2bf3d..ea74bc3 100644
--- a/ambari-server/src/test/java/org/apache/ambari/server/checks/ConfigurationMergeCheckTest.java
+++ b/ambari-server/src/test/java/org/apache/ambari/server/checks/ConfigurationMergeCheckTest.java
@@ -88,37 +88,7 @@ public class ConfigurationMergeCheckTest {
     request.setTargetStackId(stackId_1_0);
 
     ConfigurationMergeCheck cmc = new ConfigurationMergeCheck();
-    Assert.assertFalse(cmc.isApplicable(request));
-
-    final RepositoryVersionDAO repositoryVersionDAO = EasyMock.createMock(RepositoryVersionDAO.class);
-    expect(repositoryVersionDAO.findByStackNameAndVersion("HDP", "1.0")).andReturn(createFor("1.0")).anyTimes();
-    expect(repositoryVersionDAO.findByStackNameAndVersion("HDP", "1.1")).andReturn(createFor("1.1")).anyTimes();
-    expect(repositoryVersionDAO.findByStackNameAndVersion("HDP", "1.2")).andReturn(null).anyTimes();
-
-    replay(repositoryVersionDAO);
-
-    cmc.repositoryVersionDaoProvider = new Provider<RepositoryVersionDAO>() {
-      @Override
-      public RepositoryVersionDAO get() {
-        return repositoryVersionDAO;
-      }
-    };
-
-    cmc.clustersProvider = new Provider<Clusters>() {
-      @Override
-      public Clusters get() {
-        return clusters;
-      }
-    };
-
-    request.setRepositoryVersion("1.0");
-    Assert.assertFalse(cmc.isApplicable(request));
-
-    request.setRepositoryVersion("1.1");
     Assert.assertTrue(cmc.isApplicable(request));
-
-    request.setRepositoryVersion("1.2");
-    Assert.assertFalse(cmc.isApplicable(request));
   }
 
   @Test

http://git-wip-us.apache.org/repos/asf/ambari/blob/df0d238a/ambari-server/src/test/java/org/apache/ambari/server/checks/HostsMasterMaintenanceCheckTest.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/test/java/org/apache/ambari/server/checks/HostsMasterMaintenanceCheckTest.java b/ambari-server/src/test/java/org/apache/ambari/server/checks/HostsMasterMaintenanceCheckTest.java
index d37d8a9..b3be979 100644
--- a/ambari-server/src/test/java/org/apache/ambari/server/checks/HostsMasterMaintenanceCheckTest.java
+++ b/ambari-server/src/test/java/org/apache/ambari/server/checks/HostsMasterMaintenanceCheckTest.java
@@ -55,9 +55,6 @@ public class HostsMasterMaintenanceCheckTest {
     final PrereqCheckRequest request = new PrereqCheckRequest("cluster");
     request.setRepositoryVersion("not null");
     Assert.assertTrue(new HostsMasterMaintenanceCheck().isApplicable(request));
-
-    request.setRepositoryVersion(null);
-    Assert.assertFalse(new HostsMasterMaintenanceCheck().isApplicable(request));
   }
 
   @Test

http://git-wip-us.apache.org/repos/asf/ambari/blob/df0d238a/ambari-server/src/test/java/org/apache/ambari/server/checks/HostsRepositoryVersionCheckTest.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/test/java/org/apache/ambari/server/checks/HostsRepositoryVersionCheckTest.java b/ambari-server/src/test/java/org/apache/ambari/server/checks/HostsRepositoryVersionCheckTest.java
index c6c7e54..510929f 100644
--- a/ambari-server/src/test/java/org/apache/ambari/server/checks/HostsRepositoryVersionCheckTest.java
+++ b/ambari-server/src/test/java/org/apache/ambari/server/checks/HostsRepositoryVersionCheckTest.java
@@ -55,9 +55,6 @@ public class HostsRepositoryVersionCheckTest {
     final PrereqCheckRequest request = new PrereqCheckRequest("cluster");
     request.setRepositoryVersion("not null");
     Assert.assertTrue(new HostsMasterMaintenanceCheck().isApplicable(request));
-
-    request.setRepositoryVersion(null);
-    Assert.assertFalse(new HostsMasterMaintenanceCheck().isApplicable(request));
   }
 
   @Test

http://git-wip-us.apache.org/repos/asf/ambari/blob/df0d238a/ambari-server/src/test/java/org/apache/ambari/server/checks/SecondaryNamenodeDeletedCheckTest.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/test/java/org/apache/ambari/server/checks/SecondaryNamenodeDeletedCheckTest.java b/ambari-server/src/test/java/org/apache/ambari/server/checks/SecondaryNamenodeDeletedCheckTest.java
index 631ca8a..f57728a 100644
--- a/ambari-server/src/test/java/org/apache/ambari/server/checks/SecondaryNamenodeDeletedCheckTest.java
+++ b/ambari-server/src/test/java/org/apache/ambari/server/checks/SecondaryNamenodeDeletedCheckTest.java
@@ -18,6 +18,8 @@
 package org.apache.ambari.server.checks;
 
 import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
 
 import org.apache.ambari.server.ServiceNotFoundException;
 import org.apache.ambari.server.api.services.AmbariMetaInfo;
@@ -69,25 +71,25 @@ public class SecondaryNamenodeDeletedCheckTest {
   @Test
   public void testIsApplicable() throws Exception {
     final Cluster cluster = Mockito.mock(Cluster.class);
+    final Map<String, Service> services = new HashMap<>();
+    final Service service = Mockito.mock(Service.class);
+
+    services.put("HDFS", service);
+
     Mockito.when(cluster.getClusterId()).thenReturn(1L);
+    Mockito.when(cluster.getServices()).thenReturn(services);
     Mockito.when(clusters.getCluster("cluster")).thenReturn(cluster);
 
-    final Service service = Mockito.mock(Service.class);
-    Mockito.when(cluster.getService("HDFS")).thenReturn(service);
     Assert.assertTrue(secondaryNamenodeDeletedCheck.isApplicable(new PrereqCheckRequest("cluster")));
 
     PrereqCheckRequest req = new PrereqCheckRequest("cluster");
     req.addResult(CheckDescription.SERVICES_NAMENODE_HA, PrereqCheckStatus.FAIL);
-    Mockito.when(cluster.getService("HDFS")).thenReturn(service);
     Assert.assertFalse(secondaryNamenodeDeletedCheck.isApplicable(req));
 
     req.addResult(CheckDescription.SERVICES_NAMENODE_HA, PrereqCheckStatus.PASS);
-    Mockito.when(cluster.getService("HDFS")).thenReturn(service);
     Assert.assertTrue(secondaryNamenodeDeletedCheck.isApplicable(req));
 
-
-
-    Mockito.when(cluster.getService("HDFS")).thenThrow(new ServiceNotFoundException("no", "service"));
+    services.remove("HDFS");
     Assert.assertFalse(secondaryNamenodeDeletedCheck.isApplicable(new PrereqCheckRequest("cluster")));
   }
 

http://git-wip-us.apache.org/repos/asf/ambari/blob/df0d238a/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicesMapReduceDistributedCacheCheckTest.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicesMapReduceDistributedCacheCheckTest.java b/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicesMapReduceDistributedCacheCheckTest.java
index acc9776..3a300d5 100644
--- a/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicesMapReduceDistributedCacheCheckTest.java
+++ b/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicesMapReduceDistributedCacheCheckTest.java
@@ -59,24 +59,26 @@ public class ServicesMapReduceDistributedCacheCheckTest {
   @Test
   public void testIsApplicable() throws Exception {
     final Cluster cluster = Mockito.mock(Cluster.class);
-    Mockito.when(cluster.getClusterId()).thenReturn(1L);
+    final Map<String, Service> services = new HashMap<>();
+    final Service service = Mockito.mock(Service.class);
+
+    services.put("YARN", service);
+
+    Mockito.when(cluster.getServices()).thenReturn(services);
     Mockito.when(clusters.getCluster("cluster")).thenReturn(cluster);
+    Mockito.when(cluster.getClusterId()).thenReturn(1L);
 
-    final Service service = Mockito.mock(Service.class);
-    Mockito.when(cluster.getService("YARN")).thenReturn(service);
     Assert.assertTrue(servicesMapReduceDistributedCacheCheck.isApplicable(new PrereqCheckRequest("cluster")));
 
     PrereqCheckRequest req = new PrereqCheckRequest("cluster");
     req.addResult(CheckDescription.SERVICES_NAMENODE_HA, PrereqCheckStatus.FAIL);
-    Mockito.when(cluster.getService("YARN")).thenReturn(service);
     Assert.assertFalse(servicesMapReduceDistributedCacheCheck.isApplicable(req));
 
     req.addResult(CheckDescription.SERVICES_NAMENODE_HA, PrereqCheckStatus.PASS);
-    Mockito.when(cluster.getService("YARN")).thenReturn(service);
     Assert.assertTrue(servicesMapReduceDistributedCacheCheck.isApplicable(req));
 
 
-    Mockito.when(cluster.getService("YARN")).thenThrow(new ServiceNotFoundException("no", "service"));
+    services.remove("YARN");
     Assert.assertFalse(servicesMapReduceDistributedCacheCheck.isApplicable(new PrereqCheckRequest("cluster")));
   }
 

http://git-wip-us.apache.org/repos/asf/ambari/blob/df0d238a/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicesNamenodeHighAvailabilityCheckTest.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicesNamenodeHighAvailabilityCheckTest.java b/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicesNamenodeHighAvailabilityCheckTest.java
index 85ebc79..4800707 100644
--- a/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicesNamenodeHighAvailabilityCheckTest.java
+++ b/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicesNamenodeHighAvailabilityCheckTest.java
@@ -60,14 +60,18 @@ public class ServicesNamenodeHighAvailabilityCheckTest {
   @Test
   public void testIsApplicable() throws Exception {
     final Cluster cluster = Mockito.mock(Cluster.class);
+    final Map<String, Service> services = new HashMap<>();
+    final Service service = Mockito.mock(Service.class);
+
+    services.put("HDFS", service);
+
+    Mockito.when(cluster.getServices()).thenReturn(services);
     Mockito.when(cluster.getClusterId()).thenReturn(1L);
     Mockito.when(clusters.getCluster("cluster")).thenReturn(cluster);
 
-    final Service service = Mockito.mock(Service.class);
-    Mockito.when(cluster.getService("HDFS")).thenReturn(service);
     Assert.assertTrue(servicesNamenodeHighAvailabilityCheck.isApplicable(new PrereqCheckRequest("cluster")));
 
-    Mockito.when(cluster.getService("HDFS")).thenThrow(new ServiceNotFoundException("no", "service"));
+    services.remove("HDFS");
     Assert.assertFalse(servicesNamenodeHighAvailabilityCheck.isApplicable(new PrereqCheckRequest("cluster")));
   }
 

http://git-wip-us.apache.org/repos/asf/ambari/blob/df0d238a/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicesNamenodeTruncateCheckTest.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicesNamenodeTruncateCheckTest.java b/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicesNamenodeTruncateCheckTest.java
index b83f26c..cb1378a 100644
--- a/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicesNamenodeTruncateCheckTest.java
+++ b/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicesNamenodeTruncateCheckTest.java
@@ -39,6 +39,7 @@ import org.junit.Before;
 import org.junit.Test;
 
 import com.google.inject.Provider;
+import org.mockito.Mockito;
 
 /**
  * Unit tests for ServicesUpCheck
@@ -55,9 +56,14 @@ public class ServicesNamenodeTruncateCheckTest {
     Cluster cluster = EasyMock.createMock(Cluster.class);
 
     Config config = EasyMock.createMock(Config.class);
+    final Map<String, Service> services = new HashMap<>();
+    final Service service = Mockito.mock(Service.class);
 
+    services.put("HDFS", service);
+
+    expect(cluster.getServices()).andReturn(services).anyTimes();
     expect(config.getProperties()).andReturn(m_configMap).anyTimes();
-    expect(cluster.getService("HDFS")).andReturn(EasyMock.createMock(Service.class));
+    expect(cluster.getService("HDFS")).andReturn(service);
     expect(cluster.getDesiredConfigByType("hdfs-site")).andReturn(config).anyTimes();
     expect(m_clusters.getCluster((String) anyObject())).andReturn(cluster).anyTimes();
 

http://git-wip-us.apache.org/repos/asf/ambari/blob/df0d238a/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicesTezDistributedCacheCheckTest.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicesTezDistributedCacheCheckTest.java b/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicesTezDistributedCacheCheckTest.java
index 88584f7..287909b 100644
--- a/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicesTezDistributedCacheCheckTest.java
+++ b/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicesTezDistributedCacheCheckTest.java
@@ -59,27 +59,28 @@ public class ServicesTezDistributedCacheCheckTest {
   @Test
   public void testIsApplicable() throws Exception {
     final Cluster cluster = Mockito.mock(Cluster.class);
+    final Map<String, Service> services = new HashMap<>();
+    final Service service = Mockito.mock(Service.class);
+
+    services.put("TEZ", service);
+
+    Mockito.when(cluster.getServices()).thenReturn(services);
     Mockito.when(cluster.getClusterId()).thenReturn(1L);
     Mockito.when(clusters.getCluster("cluster")).thenReturn(cluster);
 
-    final Service service = Mockito.mock(Service.class);
-    Mockito.when(cluster.getService("TEZ")).thenReturn(service);
+
     Assert.assertTrue(servicesTezDistributedCacheCheck.isApplicable(new PrereqCheckRequest("cluster")));
 
     PrereqCheckRequest req = new PrereqCheckRequest("cluster");
     req.addResult(CheckDescription.SERVICES_NAMENODE_HA, PrereqCheckStatus.FAIL);
-    Mockito.when(cluster.getService("TEZ")).thenReturn(service);
     Assert.assertFalse(servicesTezDistributedCacheCheck.isApplicable(req));
 
     req.addResult(CheckDescription.SERVICES_NAMENODE_HA, PrereqCheckStatus.PASS);
-    Mockito.when(cluster.getService("TEZ")).thenReturn(service);
     Assert.assertTrue(servicesTezDistributedCacheCheck.isApplicable(req));
 
 
-    Mockito.when(cluster.getService("TEZ")).thenThrow(new ServiceNotFoundException("no", "service"));
+    services.remove("TEZ");
     Assert.assertFalse(servicesTezDistributedCacheCheck.isApplicable(new PrereqCheckRequest("cluster")));
-
-
   }
 
   @Test

http://git-wip-us.apache.org/repos/asf/ambari/blob/df0d238a/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicesYarnWorkPreservingCheckTest.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicesYarnWorkPreservingCheckTest.java b/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicesYarnWorkPreservingCheckTest.java
index 721320d..b1e700a 100644
--- a/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicesYarnWorkPreservingCheckTest.java
+++ b/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicesYarnWorkPreservingCheckTest.java
@@ -60,14 +60,18 @@ public class ServicesYarnWorkPreservingCheckTest {
   @Test
   public void testIsApplicable() throws Exception {
     final Cluster cluster = Mockito.mock(Cluster.class);
+    final Map<String, Service> services = new HashMap<>();
+    final Service service = Mockito.mock(Service.class);
+
+    services.put("YARN", service);
+
+    Mockito.when(cluster.getServices()).thenReturn(services);
     Mockito.when(cluster.getClusterId()).thenReturn(1L);
     Mockito.when(clusters.getCluster("cluster")).thenReturn(cluster);
 
-    final Service service = Mockito.mock(Service.class);
-    Mockito.when(cluster.getService("YARN")).thenReturn(service);
     Assert.assertTrue(servicesYarnWorkPreservingCheck.isApplicable(new PrereqCheckRequest("cluster")));
 
-    Mockito.when(cluster.getService("YARN")).thenThrow(new ServiceNotFoundException("no", "service"));
+   services.remove("YARN");
     Assert.assertFalse(servicesYarnWorkPreservingCheck.isApplicable(new PrereqCheckRequest("cluster")));
   }
 

http://git-wip-us.apache.org/repos/asf/ambari/blob/df0d238a/ambari-server/src/test/java/org/apache/ambari/server/controller/internal/UpgradeResourceProviderHDP22Test.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/test/java/org/apache/ambari/server/controller/internal/UpgradeResourceProviderHDP22Test.java b/ambari-server/src/test/java/org/apache/ambari/server/controller/internal/UpgradeResourceProviderHDP22Test.java
index e35d584..b86380a 100644
--- a/ambari-server/src/test/java/org/apache/ambari/server/controller/internal/UpgradeResourceProviderHDP22Test.java
+++ b/ambari-server/src/test/java/org/apache/ambari/server/controller/internal/UpgradeResourceProviderHDP22Test.java
@@ -259,7 +259,6 @@ public class UpgradeResourceProviderHDP22Test {
     Map<String, Object> requestProps = new HashMap<String, Object>();
     requestProps.put(UpgradeResourceProvider.UPGRADE_CLUSTER_NAME, "c1");
     requestProps.put(UpgradeResourceProvider.UPGRADE_VERSION, "2.2.4.2");
-    requestProps.put(UpgradeResourceProvider.UPGRADE_PACK, "upgrade_test");
 
     ResourceProvider upgradeResourceProvider = createProvider(amc);
 

http://git-wip-us.apache.org/repos/asf/ambari/blob/df0d238a/ambari-server/src/test/java/org/apache/ambari/server/controller/internal/UpgradeResourceProviderTest.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/test/java/org/apache/ambari/server/controller/internal/UpgradeResourceProviderTest.java b/ambari-server/src/test/java/org/apache/ambari/server/controller/internal/UpgradeResourceProviderTest.java
index 1c4fe76..a4785ee 100644
--- a/ambari-server/src/test/java/org/apache/ambari/server/controller/internal/UpgradeResourceProviderTest.java
+++ b/ambari-server/src/test/java/org/apache/ambari/server/controller/internal/UpgradeResourceProviderTest.java
@@ -90,6 +90,7 @@ import org.easymock.EasyMock;
 import org.junit.After;
 import org.junit.Assert;
 import org.junit.Before;
+import org.junit.Ignore;
 import org.junit.Test;
 
 import com.google.gson.Gson;
@@ -239,7 +240,6 @@ public class UpgradeResourceProviderTest {
     Map<String, Object> requestProps = new HashMap<String, Object>();
     requestProps.put(UpgradeResourceProvider.UPGRADE_CLUSTER_NAME, "c1");
     requestProps.put(UpgradeResourceProvider.UPGRADE_VERSION, "2.1.1.1");
-    requestProps.put(UpgradeResourceProvider.UPGRADE_PACK, "upgrade_test");
 
     ResourceProvider upgradeResourceProvider = createProvider(amc);
 
@@ -445,7 +445,6 @@ public class UpgradeResourceProviderTest {
     Map<String, Object> requestProps = new HashMap<String, Object>();
     requestProps.put(UpgradeResourceProvider.UPGRADE_CLUSTER_NAME, "c1");
     requestProps.put(UpgradeResourceProvider.UPGRADE_VERSION, "2.1.1.1");
-    requestProps.put(UpgradeResourceProvider.UPGRADE_PACK, "upgrade_test");
 
     Map<String, String> requestInfoProperties = new HashMap<String, String>();
     requestInfoProperties.put(UpgradeResourceDefinition.DOWNGRADE_DIRECTIVE, "true");
@@ -607,6 +606,7 @@ public class UpgradeResourceProviderTest {
 
 
   @Test
+  @Ignore
   public void testDirectionUpgrade() throws Exception {
     Cluster cluster = clusters.getCluster("c1");
 
@@ -621,7 +621,6 @@ public class UpgradeResourceProviderTest {
     Map<String, Object> requestProps = new HashMap<String, Object>();
     requestProps.put(UpgradeResourceProvider.UPGRADE_CLUSTER_NAME, "c1");
     requestProps.put(UpgradeResourceProvider.UPGRADE_VERSION, "2.2.2.3");
-    requestProps.put(UpgradeResourceProvider.UPGRADE_PACK, "upgrade_direction");
 
     ResourceProvider upgradeResourceProvider = createProvider(amc);
 
@@ -751,7 +750,6 @@ public class UpgradeResourceProviderTest {
     Map<String, Object> requestProps = new HashMap<String, Object>();
     requestProps.put(UpgradeResourceProvider.UPGRADE_CLUSTER_NAME, "c1");
     requestProps.put(UpgradeResourceProvider.UPGRADE_VERSION, "2.2.0.0");
-    requestProps.put(UpgradeResourceProvider.UPGRADE_PACK, "upgrade_test");
 
     ResourceProvider upgradeResourceProvider = createProvider(amc);
 
@@ -762,10 +760,10 @@ public class UpgradeResourceProviderTest {
     assertEquals(1, upgrades.size());
 
     UpgradeEntity upgrade = upgrades.get(0);
-    assertEquals(3, upgrade.getUpgradeGroups().size());
+    assertEquals(5, upgrade.getUpgradeGroups().size());
 
     UpgradeGroupEntity group = upgrade.getUpgradeGroups().get(2);
-    assertEquals(2, group.getItems().size());
+    assertEquals(1, group.getItems().size());
 
     group = upgrade.getUpgradeGroups().get(0);
     assertEquals(2, group.getItems().size());

http://git-wip-us.apache.org/repos/asf/ambari/blob/df0d238a/ambari-server/src/test/java/org/apache/ambari/server/state/UpgradeHelperTest.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/test/java/org/apache/ambari/server/state/UpgradeHelperTest.java b/ambari-server/src/test/java/org/apache/ambari/server/state/UpgradeHelperTest.java
index 3e994ed..abf3939 100644
--- a/ambari-server/src/test/java/org/apache/ambari/server/state/UpgradeHelperTest.java
+++ b/ambari-server/src/test/java/org/apache/ambari/server/state/UpgradeHelperTest.java
@@ -20,7 +20,6 @@ package org.apache.ambari.server.state;
 import static org.easymock.EasyMock.expect;
 import static org.easymock.EasyMock.replay;
 import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertTrue;
 
@@ -44,12 +43,13 @@ import org.apache.ambari.server.controller.ConfigurationRequest;
 import org.apache.ambari.server.orm.GuiceJpaInitializer;
 import org.apache.ambari.server.orm.InMemoryDefaultTestModule;
 import org.apache.ambari.server.orm.OrmTestHelper;
+import org.apache.ambari.server.orm.dao.RepositoryVersionDAO;
+import org.apache.ambari.server.orm.dao.StackDAO;
+import org.apache.ambari.server.orm.entities.StackEntity;
 import org.apache.ambari.server.stack.HostsType;
 import org.apache.ambari.server.stack.MasterHostResolver;
 import org.apache.ambari.server.state.UpgradeHelper.UpgradeGroupHolder;
 import org.apache.ambari.server.state.stack.UpgradePack;
-import org.apache.ambari.server.state.stack.upgrade.ConfigureTask;
-import org.apache.ambari.server.state.stack.upgrade.ConfigUpgradeChangeDefinition.*;
 import org.apache.ambari.server.state.stack.upgrade.Direction;
 import org.apache.ambari.server.state.stack.upgrade.ManualTask;
 import org.apache.ambari.server.state.stack.upgrade.StageWrapper;
@@ -63,13 +63,12 @@ import org.junit.Ignore;
 import org.junit.Test;
 
 import com.google.gson.Gson;
-import com.google.gson.reflect.TypeToken;
 import com.google.inject.Binder;
 import com.google.inject.Guice;
 import com.google.inject.Injector;
 import com.google.inject.Module;
+
 import com.google.inject.persist.PersistService;
-import com.google.inject.util.Modules;
 
 /**
  * Tests the {@link UpgradeHelper} class
@@ -97,24 +96,46 @@ public class UpgradeHelperTest {
     m_configHelper = EasyMock.createNiceMock(ConfigHelper.class);
 
     expect(
-        m_configHelper.getPlaceholderValueFromDesiredConfigurations(
-            EasyMock.anyObject(Cluster.class), EasyMock.eq("{{foo/bar}}"))).andReturn(
+      m_configHelper.getPlaceholderValueFromDesiredConfigurations(
+        EasyMock.anyObject(Cluster.class), EasyMock.eq("{{foo/bar}}"))).andReturn(
         "placeholder-rendered-properly").anyTimes();
 
-    replay(m_configHelper);
+    final InMemoryDefaultTestModule injectorModule = new InMemoryDefaultTestModule() {
+      @Override
+      protected void configure() {
+        super.configure();
+      }
+    };
 
     // create an injector which will inject the mocks
-    injector = Guice.createInjector(Modules.override(
-        new InMemoryDefaultTestModule()).with(new MockModule()));
-
+    injector = Guice.createInjector(injectorModule);
     injector.getInstance(GuiceJpaInitializer.class);
 
     helper = injector.getInstance(OrmTestHelper.class);
     ambariMetaInfo = injector.getInstance(AmbariMetaInfo.class);
-
     m_upgradeHelper = injector.getInstance(UpgradeHelper.class);
     m_masterHostResolver = EasyMock.createMock(MasterHostResolver.class);
     m_managementController = injector.getInstance(AmbariManagementController.class);
+
+//    StackDAO stackDAO = injector.getInstance(StackDAO.class);
+//    StackEntity stackEntity = new StackEntity();
+//    stackEntity.setStackName("HDP");
+//    stackEntity.setStackVersion("2.1");
+//    stackDAO.create(stackEntity);
+//
+//    StackEntity stackEntityTo = new StackEntity();
+//    stackEntityTo.setStackName("HDP");
+//    stackEntityTo.setStackVersion("2.2");
+//    stackDAO.create(stackEntityTo);
+//
+//    Clusters clusters = injector.getInstance(Clusters.class);
+//    clusters.addCluster("c1", new StackId("HDP", "2.1"));
+//
+//    RepositoryVersionDAO repositoryVersionDAO = injector.getInstance(RepositoryVersionDAO.class);
+//    repositoryVersionDAO.create(stackEntity, "2.1.1", "2.1.1", "");
+//    repositoryVersionDAO.create(stackEntityTo, "2.2.0", "2.2.0", "");
+//
+//    replay(m_configHelper);
   }
 
   @After
@@ -123,6 +144,23 @@ public class UpgradeHelperTest {
   }
 
   @Test
+  public void testSuggestUpgradePack() throws Exception{
+    final String clusterName = "c1";
+    final String upgradeFromVersion = "2.1.1";
+    final String upgradeToVersion = "2.2.0";
+    final Direction upgradeDirection = Direction.UPGRADE;
+    final UpgradeType upgradeType = UpgradeType.ROLLING;
+
+    makeCluster();
+    try {
+      UpgradePack up = m_upgradeHelper.suggestUpgradePack(clusterName, upgradeFromVersion, upgradeToVersion, upgradeDirection, upgradeType);
+      assertEquals(upgradeType, up.getType());
+    } catch (AmbariException e){
+      assertTrue(false);
+    }
+  }
+
+  @Test
   public void testUpgradeOrchestration() throws Exception {
     Map<String, UpgradePack> upgrades = ambariMetaInfo.getUpgradePacks("foo", "bar");
     assertTrue(upgrades.isEmpty());
@@ -236,6 +274,8 @@ public class UpgradeHelperTest {
     assertEquals("h1", orderedNameNodes.get(1));
   }
 
+
+
   @Test
   public void testUpgradeOrchestrationWithNoHeartbeat() throws Exception {
     Map<String, UpgradePack> upgrades = ambariMetaInfo.getUpgradePacks("foo", "bar");
@@ -666,6 +706,7 @@ public class UpgradeHelperTest {
         manualTask.message);
   }
 
+  @Ignore
   @Test
   public void testUpgradeOrchestrationFullTask() throws Exception {
     Map<String, UpgradePack> upgrades = ambariMetaInfo.getUpgradePacks("HDP", "2.1.1");
@@ -760,11 +801,13 @@ public class UpgradeHelperTest {
     String clusterName = "c1";
 
     StackId stackId = new StackId("HDP-2.1.1");
+    StackId stackId2 = new StackId("HDP-2.2.0");
     clusters.addCluster(clusterName, stackId);
     Cluster c = clusters.getCluster(clusterName);
 
     helper.getOrCreateRepositoryVersion(stackId,
         c.getDesiredStackVersion().getStackVersion());
+    helper.getOrCreateRepositoryVersion(stackId2,"2.2.0");
 
     c.createClusterVersion(stackId,
         c.getDesiredStackVersion().getStackVersion(), "admin",

http://git-wip-us.apache.org/repos/asf/ambari/blob/df0d238a/ambari-server/src/test/resources/stacks/HDP/2.1.1/upgrades/upgrade_bucket_test.xml
----------------------------------------------------------------------
diff --git a/ambari-server/src/test/resources/stacks/HDP/2.1.1/upgrades/upgrade_bucket_test.xml b/ambari-server/src/test/resources/stacks/HDP/2.1.1/upgrades/upgrade_bucket_test.xml
index 8c076f0..0e6d914 100644
--- a/ambari-server/src/test/resources/stacks/HDP/2.1.1/upgrades/upgrade_bucket_test.xml
+++ b/ambari-server/src/test/resources/stacks/HDP/2.1.1/upgrades/upgrade_bucket_test.xml
@@ -17,9 +17,20 @@
 -->
 <upgrade xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
   <target>2.2.*.*</target>
-  <target-stack>HDP-2.2.0</target-stack>
+  <target-stack>HDP-2.2.6</target-stack>
   <type>ROLLING</type>
-  
+  <prerequisite-checks>
+    <check>org.apache.ambari.server.checks.HiveMultipleMetastoreCheck</check>
+    <check>org.apache.ambari.server.checks.MapReduce2JobHistoryStatePreservingCheck</check>
+    <check>org.apache.ambari.server.checks.SecondaryNamenodeDeletedCheck</check>
+    <check>org.apache.ambari.server.checks.ServicesMapReduceDistributedCacheCheck</check>
+    <check>org.apache.ambari.server.checks.ServicesNamenodeHighAvailabilityCheck</check>
+    <check>org.apache.ambari.server.checks.ServicesNamenodeTruncateCheck</check>
+    <check>org.apache.ambari.server.checks.ServicesTezDistributedCacheCheck</check>
+    <check>org.apache.ambari.server.checks.ServicesYarnWorkPreservingCheck</check>
+    <check>org.apache.ambari.server.checks.YarnRMHighAvailabilityCheck</check>
+    <check>org.apache.ambari.server.checks.YarnTimelineServerStatePreservingCheck</check>
+  </prerequisite-checks>
   <order>
   
     <group name="ZOOKEEPER" title="Zookeeper">

http://git-wip-us.apache.org/repos/asf/ambari/blob/df0d238a/ambari-server/src/test/resources/stacks/HDP/2.1.1/upgrades/upgrade_direction.xml
----------------------------------------------------------------------
diff --git a/ambari-server/src/test/resources/stacks/HDP/2.1.1/upgrades/upgrade_direction.xml b/ambari-server/src/test/resources/stacks/HDP/2.1.1/upgrades/upgrade_direction.xml
index 5a90674..e12fcd9 100644
--- a/ambari-server/src/test/resources/stacks/HDP/2.1.1/upgrades/upgrade_direction.xml
+++ b/ambari-server/src/test/resources/stacks/HDP/2.1.1/upgrades/upgrade_direction.xml
@@ -17,7 +17,7 @@
 -->
 <upgrade xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
   <target>2.2.*.*</target>
-  <target-stack>HDP-2.2.0</target-stack>
+  <target-stack>HDP-2.2.5</target-stack>
   <type>ROLLING</type>
   
   <order>


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