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From aonis...@apache.org
Subject [19/50] [abbrv] ambari git commit: AMBARI-22012. BP deploys failing intermittently with error (magyari_sandor)
Date Thu, 28 Sep 2017 13:25:08 GMT
AMBARI-22012. BP deploys failing intermittently with error  (magyari_sandor)


Project: http://git-wip-us.apache.org/repos/asf/ambari/repo
Commit: http://git-wip-us.apache.org/repos/asf/ambari/commit/b653ee0a
Tree: http://git-wip-us.apache.org/repos/asf/ambari/tree/b653ee0a
Diff: http://git-wip-us.apache.org/repos/asf/ambari/diff/b653ee0a

Branch: refs/heads/branch-3.0-perf
Commit: b653ee0a5967a8255f087f43a1cb6a878e765833
Parents: 6633a7b
Author: Sandor Magyari <smagyari@hortonworks.com>
Authored: Fri Sep 22 17:48:54 2017 +0200
Committer: Sandor Magyari <smagyari@hortonworks.com>
Committed: Mon Sep 25 21:19:53 2017 +0200

----------------------------------------------------------------------
 .../events/ClusterConfigFinishedEvent.java      | 15 +++-
 .../ambari/server/topology/TopologyManager.java | 88 +++++++++++++-------
 .../topology/tasks/ConfigureClusterTask.java    | 13 ++-
 .../tasks/ConfigureClusterTaskFactory.java      |  3 +-
 .../server/utils/ManagedThreadPoolExecutor.java | 83 ++++++++++++++++++
 .../ClusterDeployWithStartOnlyTest.java         |  2 +-
 ...InstallWithoutStartOnComponentLevelTest.java |  2 +-
 .../ClusterInstallWithoutStartTest.java         |  2 +-
 .../topology/ConfigureClusterTaskTest.java      | 18 +++-
 .../utils/ManagedThreadPoolExecutorTest.java    | 51 ++++++++++++
 10 files changed, 236 insertions(+), 41 deletions(-)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/ambari/blob/b653ee0a/ambari-server/src/main/java/org/apache/ambari/server/events/ClusterConfigFinishedEvent.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/java/org/apache/ambari/server/events/ClusterConfigFinishedEvent.java
b/ambari-server/src/main/java/org/apache/ambari/server/events/ClusterConfigFinishedEvent.java
index cdb86ac..f0574d0 100644
--- a/ambari-server/src/main/java/org/apache/ambari/server/events/ClusterConfigFinishedEvent.java
+++ b/ambari-server/src/main/java/org/apache/ambari/server/events/ClusterConfigFinishedEvent.java
@@ -23,17 +23,27 @@ package org.apache.ambari.server.events;
  * cluster configuration is successfully updated.
  */
 public class ClusterConfigFinishedEvent extends AmbariEvent {
+
+  private final long clusterId;
   private final String clusterName;
 
 
-  public ClusterConfigFinishedEvent(String clusterName) {
+  public ClusterConfigFinishedEvent(long clusterId, String clusterName) {
     super(AmbariEventType.CLUSTER_CONFIG_FINISHED);
+    this.clusterId = clusterId;
     this.clusterName = clusterName;
   }
 
   /**
+   * Get the cluster id
+   * @return
+   */
+  public long getClusterId() {
+    return clusterId;
+  }
+
+  /**
    * Get the cluster name
-   *
    * @return
    */
   public String getClusterName() {
@@ -46,6 +56,7 @@ public class ClusterConfigFinishedEvent extends AmbariEvent {
   @Override
   public String toString() {
     StringBuilder buffer = new StringBuilder("ClusterConfigChangedEvent{");
+    buffer.append("clusterId=").append(getClusterId());
     buffer.append("clusterName=").append(getClusterName());
     buffer.append("}");
     return buffer.toString();

http://git-wip-us.apache.org/repos/asf/ambari/blob/b653ee0a/ambari-server/src/main/java/org/apache/ambari/server/topology/TopologyManager.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/java/org/apache/ambari/server/topology/TopologyManager.java
b/ambari-server/src/main/java/org/apache/ambari/server/topology/TopologyManager.java
index 3af62e8..9769fae 100644
--- a/ambari-server/src/main/java/org/apache/ambari/server/topology/TopologyManager.java
+++ b/ambari-server/src/main/java/org/apache/ambari/server/topology/TopologyManager.java
@@ -29,9 +29,10 @@ import java.util.List;
 import java.util.Map;
 import java.util.Set;
 import java.util.concurrent.Callable;
-import java.util.concurrent.Executor;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
+import java.util.concurrent.LinkedBlockingQueue;
+import java.util.concurrent.TimeUnit;
 
 import org.apache.ambari.server.AmbariException;
 import org.apache.ambari.server.actionmanager.HostRoleCommand;
@@ -73,6 +74,7 @@ import org.apache.ambari.server.state.quicklinksprofile.QuickLinksProfile;
 import org.apache.ambari.server.topology.tasks.ConfigureClusterTask;
 import org.apache.ambari.server.topology.tasks.ConfigureClusterTaskFactory;
 import org.apache.ambari.server.topology.validators.TopologyValidatorService;
+import org.apache.ambari.server.utils.ManagedThreadPoolExecutor;
 import org.apache.ambari.server.utils.RetryHelper;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -102,9 +104,23 @@ public class TopologyManager {
   private static final String CLUSTER_CONFIG_TASK_MAX_TIME_IN_MILLIS_PROPERTY_NAME = "cluster_configure_task_timeout";
 
   private PersistedState persistedState;
+
+  /**
+   * Single threaded executor to execute async tasks. At the moment it's only used to execute
ConfigureClusterTask.
+   */
   private final ExecutorService executor = Executors.newSingleThreadExecutor();
-  private final Executor taskExecutor; // executes TopologyTasks
-  private final boolean parallelTaskCreationEnabled;
+
+  /**
+   * Thread pool size for topology task executors.
+   */
+  private int topologyTaskExecutorThreadPoolSize;
+  /**
+   * There is one ExecutorService for each cluster to execute TopologyTasks.
+   * TopologyTasks are submitted into ExecutorService for each cluster,
+   * however the ExecutorService is started only after cluster configuration is finished.
+   */
+  private final Map<Long, ManagedThreadPoolExecutor> topologyTaskExecutorServiceMap
= new HashMap<>();
+
   private Collection<String> hostsToIgnore = new HashSet<>();
   private final List<HostImpl> availableHosts = new LinkedList<>();
   private final Map<String, LogicalRequest> reservedHosts = new HashMap<>();
@@ -158,17 +174,15 @@ public class TopologyManager {
   private Map<Long, Boolean> clusterProvisionWithBlueprintCreationFinished = new HashMap<>();
 
   public TopologyManager() {
-    parallelTaskCreationEnabled = false;
-    taskExecutor = executor;
+    topologyTaskExecutorThreadPoolSize = 1;
   }
 
   @Inject
   public TopologyManager(Configuration configuration) {
-    int threadPoolSize = configuration.getParallelTopologyTaskCreationThreadPoolSize();
-    parallelTaskCreationEnabled = configuration.isParallelTopologyTaskCreationEnabled() &&
threadPoolSize > 1;
-    taskExecutor = parallelTaskCreationEnabled
-      ? Executors.newFixedThreadPool(threadPoolSize)
-      : executor;
+    topologyTaskExecutorThreadPoolSize = configuration.getParallelTopologyTaskCreationThreadPoolSize();
+    if (!configuration.isParallelTopologyTaskCreationEnabled()) {
+      topologyTaskExecutorThreadPoolSize = 1;
+    }
   }
 
   // executed by the IoC framework after creating the object (guice)
@@ -310,6 +324,10 @@ public class TopologyManager {
     // set provision action requested
     topology.setProvisionAction(request.getProvisionAction());
 
+
+    // create task executor for TopologyTasks
+    getOrCreateTopologyTaskExecutor(clusterId);
+
     // persist request
     LogicalRequest logicalRequest = RetryHelper.executeWithRetry(new Callable<LogicalRequest>()
{
         @Override
@@ -325,15 +343,6 @@ public class TopologyManager {
     addClusterConfigRequest(topology, new ClusterConfigurationRequest(ambariContext, topology,
true,
       stackAdvisorBlueprintProcessor, securityType == SecurityType.KERBEROS));
 
-    // Notify listeners that cluster configuration finished
-    executor.submit(new Callable<Boolean>() {
-      @Override
-      public Boolean call() throws Exception {
-        ambariEventPublisher.publish(new ClusterConfigFinishedEvent(clusterName));
-        return Boolean.TRUE;
-      }
-    });
-
     // Process the logical request
     processRequest(request, topology, logicalRequest);
 
@@ -345,6 +354,17 @@ public class TopologyManager {
     return getRequestStatus(logicalRequest.getRequestId());
   }
 
+  @Subscribe
+  public void onClusterConfigFinishedEvent(ClusterConfigFinishedEvent event) {
+    ManagedThreadPoolExecutor taskExecutor = topologyTaskExecutorServiceMap.get(event.getClusterId());
+    if (taskExecutor == null) {
+      LOG.error("Can't find executor service taskQueue not found for cluster: {} ", event.getClusterName());
+    } else {
+      LOG.info("Starting topology task ExecutorService for cluster: {}", event.getClusterName());
+      taskExecutor.start();
+    }
+  }
+
 
   /**
    * Saves the quick links profile to the DB as an Ambari setting. Creates a new setting
entity or updates the existing
@@ -941,16 +961,8 @@ public class TopologyManager {
     }
 
     LOG.info("TopologyManager.processAcceptedHostOffer: queue tasks for host = {} which responded
{}", hostName, response.getAnswer());
-    if (parallelTaskCreationEnabled) {
-      executor.execute(new Runnable() { // do not start until cluster config done
-        @Override
-        public void run() {
-          queueHostTasks(topology, response, hostName);
-        }
-      });
-    } else {
-      queueHostTasks(topology, response, hostName);
-    }
+    queueHostTasks(topology, response, hostName);
+
   }
 
   @Transactional
@@ -959,9 +971,23 @@ public class TopologyManager {
     persistedState.registerInTopologyHostInfo(host);
   }
 
+  private ExecutorService getOrCreateTopologyTaskExecutor(Long clusterId) {
+    ManagedThreadPoolExecutor topologyTaskExecutor = this.topologyTaskExecutorServiceMap.get(clusterId);
+    if (topologyTaskExecutor == null) {
+      LOG.info("Creating TopologyTaskExecutorService for clusterId: {}", clusterId);
+
+      topologyTaskExecutor = new ManagedThreadPoolExecutor(topologyTaskExecutorThreadPoolSize,
+              topologyTaskExecutorThreadPoolSize, 0L, TimeUnit.MILLISECONDS,
+              new LinkedBlockingQueue<Runnable>());
+      topologyTaskExecutorServiceMap.put(clusterId, topologyTaskExecutor);
+    }
+    return topologyTaskExecutor;
+  }
+
   private void queueHostTasks(ClusterTopology topology, HostOfferResponse response, String
hostName) {
     LOG.info("TopologyManager.processAcceptedHostOffer: queueing tasks for host = {}", hostName);
-    response.executeTasks(taskExecutor, hostName, topology, ambariContext);
+    ExecutorService executorService = getOrCreateTopologyTaskExecutor(topology.getClusterId());
+    response.executeTasks(executorService, hostName, topology, ambariContext);
   }
 
   private void updateHostWithRackInfo(ClusterTopology topology, HostOfferResponse response,
HostImpl host) {
@@ -1108,7 +1134,7 @@ public class TopologyManager {
     }
 
     ConfigureClusterTask configureClusterTask = configureClusterTaskFactory.createConfigureClusterTask(topology,
-      configurationRequest);
+      configurationRequest, ambariEventPublisher);
 
     AsyncCallableService<Boolean> asyncCallableService = new AsyncCallableService<>(configureClusterTask,
timeout, delay,
         Executors.newScheduledThreadPool(1));

http://git-wip-us.apache.org/repos/asf/ambari/blob/b653ee0a/ambari-server/src/main/java/org/apache/ambari/server/topology/tasks/ConfigureClusterTask.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/java/org/apache/ambari/server/topology/tasks/ConfigureClusterTask.java
b/ambari-server/src/main/java/org/apache/ambari/server/topology/tasks/ConfigureClusterTask.java
index 0ce5982..60eaa59 100644
--- a/ambari-server/src/main/java/org/apache/ambari/server/topology/tasks/ConfigureClusterTask.java
+++ b/ambari-server/src/main/java/org/apache/ambari/server/topology/tasks/ConfigureClusterTask.java
@@ -22,6 +22,8 @@ import java.util.Collections;
 import java.util.Map;
 import java.util.concurrent.Callable;
 
+import org.apache.ambari.server.events.ClusterConfigFinishedEvent;
+import org.apache.ambari.server.events.publishers.AmbariEventPublisher;
 import org.apache.ambari.server.security.authorization.internal.RunWithInternalSecurityContext;
 import org.apache.ambari.server.topology.ClusterConfigurationRequest;
 import org.apache.ambari.server.topology.ClusterTopology;
@@ -39,11 +41,14 @@ public class ConfigureClusterTask implements Callable<Boolean> {
 
   private ClusterConfigurationRequest configRequest;
   private ClusterTopology topology;
+  private AmbariEventPublisher ambariEventPublisher;
 
   @AssistedInject
-  public ConfigureClusterTask(@Assisted ClusterTopology topology, @Assisted ClusterConfigurationRequest
configRequest) {
+  public ConfigureClusterTask(@Assisted ClusterTopology topology, @Assisted ClusterConfigurationRequest
configRequest,
+                              @Assisted AmbariEventPublisher ambariEventPublisher) {
     this.configRequest = configRequest;
     this.topology = topology;
+    this.ambariEventPublisher = ambariEventPublisher;
   }
 
   @Override
@@ -72,6 +77,12 @@ public class ConfigureClusterTask implements Callable<Boolean> {
       throw new Exception(e);
     }
 
+    LOG.info("Cluster configuration finished successfully!");
+    // Notify listeners that cluster configuration finished
+    long clusterId = topology.getClusterId();
+    ambariEventPublisher.publish(new ClusterConfigFinishedEvent(clusterId,
+            topology.getAmbariContext().getClusterName(clusterId)));
+
     LOG.info("TopologyManager.ConfigureClusterTask: Exiting");
     return true;
   }

http://git-wip-us.apache.org/repos/asf/ambari/blob/b653ee0a/ambari-server/src/main/java/org/apache/ambari/server/topology/tasks/ConfigureClusterTaskFactory.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/java/org/apache/ambari/server/topology/tasks/ConfigureClusterTaskFactory.java
b/ambari-server/src/main/java/org/apache/ambari/server/topology/tasks/ConfigureClusterTaskFactory.java
index 9e3c151..558af30 100644
--- a/ambari-server/src/main/java/org/apache/ambari/server/topology/tasks/ConfigureClusterTaskFactory.java
+++ b/ambari-server/src/main/java/org/apache/ambari/server/topology/tasks/ConfigureClusterTaskFactory.java
@@ -18,6 +18,7 @@
 
 package org.apache.ambari.server.topology.tasks;
 
+import org.apache.ambari.server.events.publishers.AmbariEventPublisher;
 import org.apache.ambari.server.topology.ClusterConfigurationRequest;
 import org.apache.ambari.server.topology.ClusterTopology;
 
@@ -25,6 +26,6 @@ import org.apache.ambari.server.topology.ClusterTopology;
 public interface ConfigureClusterTaskFactory {
 
    ConfigureClusterTask createConfigureClusterTask(ClusterTopology topology, ClusterConfigurationRequest
-    configRequest);
+    configRequest, AmbariEventPublisher ambariEventPublisher);
 
 }

http://git-wip-us.apache.org/repos/asf/ambari/blob/b653ee0a/ambari-server/src/main/java/org/apache/ambari/server/utils/ManagedThreadPoolExecutor.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/java/org/apache/ambari/server/utils/ManagedThreadPoolExecutor.java
b/ambari-server/src/main/java/org/apache/ambari/server/utils/ManagedThreadPoolExecutor.java
new file mode 100644
index 0000000..167c9cb
--- /dev/null
+++ b/ambari-server/src/main/java/org/apache/ambari/server/utils/ManagedThreadPoolExecutor.java
@@ -0,0 +1,83 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distribut
+ * ed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.ambari.server.utils;
+
+import java.util.concurrent.BlockingQueue;
+import java.util.concurrent.Executors;
+import java.util.concurrent.ThreadPoolExecutor;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.locks.Condition;
+import java.util.concurrent.locks.ReentrantLock;
+
+/**
+ * ThreadPoolExecutor extension which is stopped by default and can be started & stopped.
+ */
+public class ManagedThreadPoolExecutor extends ThreadPoolExecutor {
+
+  private volatile boolean isStopped;
+  private final ReentrantLock pauseLock = new ReentrantLock();
+  private final Condition unpaused = pauseLock.newCondition();
+
+  public ManagedThreadPoolExecutor(int corePoolSize, int maximumPoolSize,
+                            long keepAliveTime, TimeUnit unit,
+                            BlockingQueue<Runnable> workQueue) {
+    super(corePoolSize, maximumPoolSize, keepAliveTime, unit, workQueue,
+            Executors.defaultThreadFactory());
+    isStopped = true;
+  }
+
+  protected void beforeExecute(Thread t, Runnable r) {
+    super.beforeExecute(t, r);
+    pauseLock.lock();
+    try {
+      while (isStopped) {
+        unpaused.await();
+      }
+    } catch (InterruptedException ie) {
+      t.interrupt();
+    } finally {
+      pauseLock.unlock();
+    }
+  }
+
+  public void start() {
+    pauseLock.lock();
+    try {
+      isStopped = false;
+      unpaused.signalAll();
+    } finally {
+      pauseLock.unlock();
+    }
+  }
+
+  public void stop() {
+    pauseLock.lock();
+    try {
+      isStopped = true;
+    } finally {
+      pauseLock.unlock();
+    }
+  }
+
+  public boolean isRunning() {
+    return !isStopped;
+  }
+
+}

http://git-wip-us.apache.org/repos/asf/ambari/blob/b653ee0a/ambari-server/src/test/java/org/apache/ambari/server/topology/ClusterDeployWithStartOnlyTest.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/test/java/org/apache/ambari/server/topology/ClusterDeployWithStartOnlyTest.java
b/ambari-server/src/test/java/org/apache/ambari/server/topology/ClusterDeployWithStartOnlyTest.java
index c3248a3..0daa20f 100644
--- a/ambari-server/src/test/java/org/apache/ambari/server/topology/ClusterDeployWithStartOnlyTest.java
+++ b/ambari-server/src/test/java/org/apache/ambari/server/topology/ClusterDeployWithStartOnlyTest.java
@@ -391,7 +391,7 @@ public class ClusterDeployWithStartOnlyTest extends EasyMockSupport {
     ambariContext.persistInstallStateForUI(CLUSTER_NAME, STACK_NAME, STACK_VERSION);
     expectLastCall().once();
 
-    expect(executor.submit(anyObject(AsyncCallableService.class))).andReturn(mockFuture).times(2);
+    expect(executor.submit(anyObject(AsyncCallableService.class))).andReturn(mockFuture).times(1);
 
     persistedTopologyRequest = new PersistedTopologyRequest(1, request);
     expect(persistedState.getAllRequests()).andReturn(Collections.emptyMap()).once();

http://git-wip-us.apache.org/repos/asf/ambari/blob/b653ee0a/ambari-server/src/test/java/org/apache/ambari/server/topology/ClusterInstallWithoutStartOnComponentLevelTest.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/test/java/org/apache/ambari/server/topology/ClusterInstallWithoutStartOnComponentLevelTest.java
b/ambari-server/src/test/java/org/apache/ambari/server/topology/ClusterInstallWithoutStartOnComponentLevelTest.java
index 372d0a1..bbf4fdb 100644
--- a/ambari-server/src/test/java/org/apache/ambari/server/topology/ClusterInstallWithoutStartOnComponentLevelTest.java
+++ b/ambari-server/src/test/java/org/apache/ambari/server/topology/ClusterInstallWithoutStartOnComponentLevelTest.java
@@ -368,7 +368,7 @@ public class ClusterInstallWithoutStartOnComponentLevelTest extends EasyMockSupp
     ambariContext.persistInstallStateForUI(CLUSTER_NAME, STACK_NAME, STACK_VERSION);
     expectLastCall().once();
 
-    expect(executor.submit(anyObject(AsyncCallableService.class))).andReturn(mockFuture).times(2);
+    expect(executor.submit(anyObject(AsyncCallableService.class))).andReturn(mockFuture).times(1);
 
     persistedTopologyRequest = new PersistedTopologyRequest(1, request);
     expect(persistedState.getAllRequests()).andReturn(Collections.emptyMap()).once();

http://git-wip-us.apache.org/repos/asf/ambari/blob/b653ee0a/ambari-server/src/test/java/org/apache/ambari/server/topology/ClusterInstallWithoutStartTest.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/test/java/org/apache/ambari/server/topology/ClusterInstallWithoutStartTest.java
b/ambari-server/src/test/java/org/apache/ambari/server/topology/ClusterInstallWithoutStartTest.java
index 9620507..059a8be 100644
--- a/ambari-server/src/test/java/org/apache/ambari/server/topology/ClusterInstallWithoutStartTest.java
+++ b/ambari-server/src/test/java/org/apache/ambari/server/topology/ClusterInstallWithoutStartTest.java
@@ -363,7 +363,7 @@ public class ClusterInstallWithoutStartTest extends EasyMockSupport {
     ambariContext.persistInstallStateForUI(CLUSTER_NAME, STACK_NAME, STACK_VERSION);
     expectLastCall().once();
 
-    expect(executor.submit(anyObject(AsyncCallableService.class))).andReturn(mockFuture).times(2);
+    expect(executor.submit(anyObject(AsyncCallableService.class))).andReturn(mockFuture).times(1);
 
     persistedTopologyRequest = new PersistedTopologyRequest(1, request);
     expect(persistedState.getAllRequests()).andReturn(Collections.emptyMap()).once();

http://git-wip-us.apache.org/repos/asf/ambari/blob/b653ee0a/ambari-server/src/test/java/org/apache/ambari/server/topology/ConfigureClusterTaskTest.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/test/java/org/apache/ambari/server/topology/ConfigureClusterTaskTest.java
b/ambari-server/src/test/java/org/apache/ambari/server/topology/ConfigureClusterTaskTest.java
index feefcab..b2dac8f 100644
--- a/ambari-server/src/test/java/org/apache/ambari/server/topology/ConfigureClusterTaskTest.java
+++ b/ambari-server/src/test/java/org/apache/ambari/server/topology/ConfigureClusterTaskTest.java
@@ -18,6 +18,7 @@
 
 package org.apache.ambari.server.topology;
 
+import static org.easymock.EasyMock.anyObject;
 import static org.easymock.EasyMock.expect;
 import static org.easymock.EasyMock.replay;
 import static org.easymock.EasyMock.reset;
@@ -30,6 +31,7 @@ import java.util.HashMap;
 import java.util.Map;
 import java.util.concurrent.Executors;
 
+import org.apache.ambari.server.events.publishers.AmbariEventPublisher;
 import org.apache.ambari.server.topology.tasks.ConfigureClusterTask;
 import org.easymock.EasyMockRule;
 import org.easymock.Mock;
@@ -60,12 +62,18 @@ public class ConfigureClusterTaskTest {
   @Mock(type = MockType.STRICT)
   private ClusterTopology clusterTopology;
 
+  @Mock(type = MockType.STRICT)
+  private AmbariContext ambariContext;
+
+  @Mock(type = MockType.NICE)
+  private AmbariEventPublisher ambariEventPublisher;
+
   private ConfigureClusterTask testSubject;
 
   @Before
   public void before() {
-    reset(clusterConfigurationRequest, clusterTopology);
-    testSubject = new ConfigureClusterTask(clusterTopology, clusterConfigurationRequest);
+    reset(clusterConfigurationRequest, clusterTopology, ambariContext, ambariEventPublisher);
+    testSubject = new ConfigureClusterTask(clusterTopology, clusterConfigurationRequest,
ambariEventPublisher);
   }
 
   @Test
@@ -75,11 +83,15 @@ public class ConfigureClusterTaskTest {
     // is it OK to handle the non existence of hostgroups as a success?!
     expect(clusterConfigurationRequest.getRequiredHostGroups()).andReturn(Collections.emptyList());
     expect(clusterTopology.getHostGroupInfo()).andReturn(Collections.emptyMap());
+    expect(clusterTopology.getClusterId()).andReturn(1L).anyTimes();
+    expect(clusterTopology.getAmbariContext()).andReturn(ambariContext);
+    expect(ambariContext.getClusterName(1L)).andReturn("testCluster");
 
     // this is only called if the "prerequisites" are satisfied
     clusterConfigurationRequest.process();
+    ambariEventPublisher.publish(anyObject());
 
-    replay(clusterConfigurationRequest, clusterTopology);
+    replay(clusterConfigurationRequest, clusterTopology, ambariContext, ambariEventPublisher);
 
     // WHEN
     Boolean result = testSubject.call();

http://git-wip-us.apache.org/repos/asf/ambari/blob/b653ee0a/ambari-server/src/test/java/org/apache/ambari/server/utils/ManagedThreadPoolExecutorTest.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/test/java/org/apache/ambari/server/utils/ManagedThreadPoolExecutorTest.java
b/ambari-server/src/test/java/org/apache/ambari/server/utils/ManagedThreadPoolExecutorTest.java
new file mode 100644
index 0000000..e94b25c
--- /dev/null
+++ b/ambari-server/src/test/java/org/apache/ambari/server/utils/ManagedThreadPoolExecutorTest.java
@@ -0,0 +1,51 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.ambari.server.utils;
+
+import java.util.concurrent.Callable;
+import java.util.concurrent.Future;
+import java.util.concurrent.LinkedBlockingQueue;
+import java.util.concurrent.TimeUnit;
+
+import org.junit.Test;
+
+import junit.framework.Assert;
+
+public class ManagedThreadPoolExecutorTest {
+
+  @Test
+  public void testGetHostAndPortFromProperty() {
+
+    ManagedThreadPoolExecutor  topologyTaskExecutor = new ManagedThreadPoolExecutor(1,
+            1, 0L, TimeUnit.MILLISECONDS,
+            new LinkedBlockingQueue<Runnable>());
+    Future<Boolean> feature = topologyTaskExecutor.submit(new Callable<Boolean>()
{
+      @Override
+      public Boolean call() {
+        return Boolean.TRUE;
+      }
+    });
+
+    Assert.assertTrue(!topologyTaskExecutor.isRunning());
+    topologyTaskExecutor.start();
+    Assert.assertTrue(topologyTaskExecutor.isRunning());
+    topologyTaskExecutor.stop();
+    Assert.assertTrue(!topologyTaskExecutor.isRunning());
+
+  }
+}


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