YARN-6924. Metrics for Federation AMRMProxy. Contributed by Young Chen

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/java/org/apache/hadoop/yarn/server/nodemanager/amrmproxy/AMRMProxyMetrics.java

@@ -0,0 +1,198 @@
+/*
+ * 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.hadoop.yarn.server.nodemanager.amrmproxy;
+
+import com.google.common.annotations.VisibleForTesting;
+import org.apache.hadoop.metrics2.MetricsInfo;
+import org.apache.hadoop.metrics2.annotation.Metric;
+import org.apache.hadoop.metrics2.annotation.Metrics;
+import org.apache.hadoop.metrics2.lib.DefaultMetricsSystem;
+import org.apache.hadoop.metrics2.lib.MetricsRegistry;
+import org.apache.hadoop.metrics2.lib.MutableGaugeLong;
+import org.apache.hadoop.metrics2.lib.MutableQuantiles;
+import org.apache.hadoop.metrics2.lib.MutableRate;
+
+import static org.apache.hadoop.metrics2.lib.Interns.info;
+
+@Metrics(about = "Metrics for AMRMProxy", context = "fedr")
+public final class AMRMProxyMetrics {
+
+  private static final MetricsInfo RECORD_INFO =
+      info("AMRMProxyMetrics", "Metrics for the AMRMProxy");
+  @Metric("# of failed applications start requests")
+  private MutableGaugeLong failedAppStartRequests;
+  @Metric("# of failed register AM requests")
+  private MutableGaugeLong failedRegisterAMRequests;
+  @Metric("# of failed finish AM requests")
+  private MutableGaugeLong failedFinishAMRequests;
+  @Metric("# of failed allocate requests ")
+  private MutableGaugeLong failedAllocateRequests;
+  @Metric("# of failed application recoveries")
+  private MutableGaugeLong failedAppRecoveryCount;
+  // Aggregate metrics are shared, and don't have to be looked up per call
+  @Metric("Application start request latency(ms)")
+  private MutableRate totalSucceededAppStartRequests;
+  @Metric("Register application master latency(ms)")
+  private MutableRate totalSucceededRegisterAMRequests;
+  @Metric("Finish application master latency(ms)")
+  private MutableRate totalSucceededFinishAMRequests;
+  @Metric("Allocate latency(ms)")
+  private MutableRate totalSucceededAllocateRequests;
+  // Quantile latency in ms - this is needed for SLA (95%, 99%, etc)
+  private MutableQuantiles applicationStartLatency;
+  private MutableQuantiles registerAMLatency;
+  private MutableQuantiles finishAMLatency;
+  private MutableQuantiles allocateLatency;
+  private static volatile AMRMProxyMetrics instance = null;
+  private MetricsRegistry registry;
+
+  private AMRMProxyMetrics() {
+    registry = new MetricsRegistry(RECORD_INFO);
+    registry.tag(RECORD_INFO, "AMRMProxy");
+
+    applicationStartLatency = registry
+        .newQuantiles("applicationStartLatency", "latency of app start", "ops",
+            "latency", 10);
+    registerAMLatency = registry
+        .newQuantiles("registerAMLatency", "latency of register AM", "ops",
+            "latency", 10);
+    finishAMLatency = registry
+        .newQuantiles("finishAMLatency", "latency of finish AM", "ops",
+            "latency", 10);
+    allocateLatency = registry
+        .newQuantiles("allocateLatency", "latency of allocate", "ops",
+            "latency", 10);
+  }
+
+  /**
+   * Initialize the singleton instance.
+   *
+   * @return the singleton
+   */
+  public static AMRMProxyMetrics getMetrics() {
+    synchronized (AMRMProxyMetrics.class) {
+      if (instance == null) {
+        instance = DefaultMetricsSystem.instance()
+            .register("AMRMProxyMetrics", "Metrics for the Yarn AMRMProxy",
+                new AMRMProxyMetrics());
+      }
+    }
+    return instance;
+  }
+
+  @VisibleForTesting
+  long getNumSucceededAppStartRequests() {
+    return totalSucceededAppStartRequests.lastStat().numSamples();
+  }
+
+  @VisibleForTesting
+  double getLatencySucceededAppStartRequests() {
+    return totalSucceededAppStartRequests.lastStat().mean();
+  }
+
+  public void succeededAppStartRequests(long duration) {
+    totalSucceededAppStartRequests.add(duration);
+    applicationStartLatency.add(duration);
+  }
+
+  @VisibleForTesting
+  long getNumSucceededRegisterAMRequests() {
+    return totalSucceededRegisterAMRequests.lastStat().numSamples();
+  }
+
+  @VisibleForTesting
+  double getLatencySucceededRegisterAMRequests() {
+    return totalSucceededRegisterAMRequests.lastStat().mean();
+  }
+
+  public void succeededRegisterAMRequests(long duration) {
+    totalSucceededRegisterAMRequests.add(duration);
+    registerAMLatency.add(duration);
+  }
+
+  @VisibleForTesting
+  long getNumSucceededFinishAMRequests() {
+    return totalSucceededFinishAMRequests.lastStat().numSamples();
+  }
+
+  @VisibleForTesting
+  double getLatencySucceededFinishAMRequests() {
+    return totalSucceededFinishAMRequests.lastStat().mean();
+  }
+
+  public void succeededFinishAMRequests(long duration) {
+    totalSucceededFinishAMRequests.add(duration);
+    finishAMLatency.add(duration);
+  }
+
+  @VisibleForTesting
+  long getNumSucceededAllocateRequests() {
+    return totalSucceededAllocateRequests.lastStat().numSamples();
+  }
+
+  @VisibleForTesting
+  double getLatencySucceededAllocateRequests() {
+    return totalSucceededAllocateRequests.lastStat().mean();
+  }
+
+  public void succeededAllocateRequests(long duration) {
+    totalSucceededAllocateRequests.add(duration);
+    allocateLatency.add(duration);
+  }
+
+  long getFailedAppStartRequests() {
+    return failedAppStartRequests.value();
+  }
+
+  public void incrFailedAppStartRequests() {
+    failedAppStartRequests.incr();
+  }
+
+  long getFailedRegisterAMRequests() {
+    return failedRegisterAMRequests.value();
+  }
+
+  public void incrFailedRegisterAMRequests() {
+    failedRegisterAMRequests.incr();
+  }
+
+  long getFailedFinishAMRequests() {
+    return failedFinishAMRequests.value();
+  }
+
+  public void incrFailedFinishAMRequests() {
+    failedFinishAMRequests.incr();
+  }
+
+  long getFailedAllocateRequests() {
+    return failedAllocateRequests.value();
+  }
+
+  public void incrFailedAllocateRequests() {
+    failedAllocateRequests.incr();
+  }
+
+  long getFailedAppRecoveryCount() {
+    return failedAppRecoveryCount.value();
+  }
+
+  public void incrFailedAppRecoveryCount() {
+    failedAppRecoveryCount.incr();
+  }
+}

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/java/org/apache/hadoop/yarn/server/nodemanager/amrmproxy/AMRMProxyService.java

@@ -75,7 +75,9 @@ import org.apache.hadoop.yarn.server.nodemanager.security.authorize
 import org.apache.hadoop.yarn.server.security.MasterKeyData;
 import org.apache.hadoop.yarn.server.utils.BuilderUtils;
 import org.apache.hadoop.yarn.server.utils.YarnServerSecurityUtils;
+import org.apache.hadoop.yarn.util.Clock;
 import org.apache.hadoop.yarn.util.ConverterUtils;
+import org.apache.hadoop.yarn.util.MonotonicClock;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -97,6 +99,7 @@ public class AMRMProxyService extends CompositeService implements
   private static final String NMSS_USER_KEY = "user";
   private static final String NMSS_AMRMTOKEN_KEY = "amrmtoken";
 
+  private final Clock clock = new MonotonicClock();
   private Server server;
   private final Context nmContext;
   private final AsyncDispatcher dispatcher;
@@ -104,6 +107,7 @@ public class AMRMProxyService extends CompositeService implements
   private AMRMProxyTokenSecretManager secretManager;
   private Map<ApplicationId, RequestInterceptorChainWrapper> applPipelineMap;
   private RegistryOperations registry;
+  private AMRMProxyMetrics metrics;
 
   /**
    * Creates an instance of the service.
@@ -122,6 +126,8 @@ public class AMRMProxyService extends CompositeService implements
 
     this.dispatcher.register(ApplicationEventType.class,
         new ApplicationEventHandler());
+
+    metrics = AMRMProxyMetrics.getMetrics();
   }
 
   @Override
@@ -272,6 +278,7 @@ public class AMRMProxyService extends CompositeService implements
       } catch (Throwable e) {
         LOG.error("Exception when recovering " + attemptId
             + ", removing it from NMStateStore and move on", e);
+        this.metrics.incrFailedAppRecoveryCount();
         this.nmContext.getNMStateStore().removeAMRMProxyAppContext(attemptId);
       }
     }
@@ -286,13 +293,26 @@ public class AMRMProxyService extends CompositeService implements
   public RegisterApplicationMasterResponse registerApplicationMaster(
       RegisterApplicationMasterRequest request) throws YarnException,
       IOException {
-    LOG.info("Registering application master." + " Host:"
-        + request.getHost() + " Port:" + request.getRpcPort()
-        + " Tracking Url:" + request.getTrackingUrl());
-    RequestInterceptorChainWrapper pipeline =
-        authorizeAndGetInterceptorChain();
-    return pipeline.getRootInterceptor()
-        .registerApplicationMaster(request);
+    long startTime = clock.getTime();
+    try {
+      RequestInterceptorChainWrapper pipeline =
+          authorizeAndGetInterceptorChain();
+      LOG.info("Registering application master." + " Host:" + request.getHost()
+          + " Port:" + request.getRpcPort() + " Tracking Url:" + request
+          .getTrackingUrl() + " for application " + pipeline
+          .getApplicationAttemptId());
+      RegisterApplicationMasterResponse response =
+          pipeline.getRootInterceptor().registerApplicationMaster(request);
+
+      long endTime = clock.getTime();
+      this.metrics.succeededRegisterAMRequests(endTime - startTime);
+      LOG.info("RegisterAM processing finished in {} ms for application {}",
+          endTime - startTime, pipeline.getApplicationAttemptId());
+      return response;
+    } catch (Throwable t) {
+      this.metrics.incrFailedRegisterAMRequests();
+      throw t;
+    }
   }
 
   /**
@@ -304,11 +324,25 @@ public class AMRMProxyService extends CompositeService implements
   public FinishApplicationMasterResponse finishApplicationMaster(
       FinishApplicationMasterRequest request) throws YarnException,
       IOException {
-    LOG.info("Finishing application master. Tracking Url:"
-        + request.getTrackingUrl());
-    RequestInterceptorChainWrapper pipeline =
-        authorizeAndGetInterceptorChain();
-    return pipeline.getRootInterceptor().finishApplicationMaster(request);
+    long startTime = clock.getTime();
+    try {
+      RequestInterceptorChainWrapper pipeline =
+          authorizeAndGetInterceptorChain();
+      LOG.info("Finishing application master for {}. Tracking Url: {}",
+          pipeline.getApplicationAttemptId(), request.getTrackingUrl());
+      FinishApplicationMasterResponse response =
+          pipeline.getRootInterceptor().finishApplicationMaster(request);
+
+      long endTime = clock.getTime();
+      this.metrics.succeededFinishAMRequests(endTime - startTime);
+      LOG.info("FinishAM finished with isUnregistered = {} in {} ms for {}",
+          response.getIsUnregistered(), endTime - startTime,
+          pipeline.getApplicationAttemptId());
+      return response;
+    } catch (Throwable t) {
+      this.metrics.incrFailedFinishAMRequests();
+      throw t;
+    }
   }
 
   /**
@@ -321,16 +355,26 @@ public class AMRMProxyService extends CompositeService implements
   @Override
   public AllocateResponse allocate(AllocateRequest request)
       throws YarnException, IOException {
-    AMRMTokenIdentifier amrmTokenIdentifier =
-        YarnServerSecurityUtils.authorizeRequest();
-    RequestInterceptorChainWrapper pipeline =
-        getInterceptorChain(amrmTokenIdentifier);
-    AllocateResponse allocateResponse =
-        pipeline.getRootInterceptor().allocate(request);
+    long startTime = clock.getTime();
+    try {
+      AMRMTokenIdentifier amrmTokenIdentifier =
+          YarnServerSecurityUtils.authorizeRequest();
+      RequestInterceptorChainWrapper pipeline =
+          getInterceptorChain(amrmTokenIdentifier);
+      AllocateResponse allocateResponse =
+          pipeline.getRootInterceptor().allocate(request);
 
-    updateAMRMTokens(amrmTokenIdentifier, pipeline, allocateResponse);
+      updateAMRMTokens(amrmTokenIdentifier, pipeline, allocateResponse);
 
-    return allocateResponse;
+      long endTime = clock.getTime();
+      this.metrics.succeededAllocateRequests(endTime - startTime);
+      LOG.info("Allocate processing finished in {} ms for application {}",
+          endTime - startTime, pipeline.getApplicationAttemptId());
+      return allocateResponse;
+    } catch (Throwable t) {
+      this.metrics.incrFailedAllocateRequests();
+      throw t;
+    }
   }
 
   /**
@@ -343,40 +387,47 @@ public class AMRMProxyService extends CompositeService implements
    */
   public void processApplicationStartRequest(StartContainerRequest request)
       throws IOException, YarnException {
-    LOG.info("Callback received for initializing request "
-        + "processing pipeline for an AM");
-    ContainerTokenIdentifier containerTokenIdentifierForKey =
-        BuilderUtils.newContainerTokenIdentifier(request
-            .getContainerToken());
-    ApplicationAttemptId appAttemptId =
-        containerTokenIdentifierForKey.getContainerID()
-            .getApplicationAttemptId();
-    Credentials credentials =
-        YarnServerSecurityUtils.parseCredentials(request
-            .getContainerLaunchContext());
+    long startTime = clock.getTime();
+    try {
+      LOG.info("Callback received for initializing request "
+          + "processing pipeline for an AM");
+      ContainerTokenIdentifier containerTokenIdentifierForKey =
+          BuilderUtils.newContainerTokenIdentifier(request.getContainerToken());
+      ApplicationAttemptId appAttemptId =
+          containerTokenIdentifierForKey.getContainerID()
+              .getApplicationAttemptId();
+      Credentials credentials = YarnServerSecurityUtils
+          .parseCredentials(request.getContainerLaunchContext());
 
-    Token<AMRMTokenIdentifier> amrmToken =
-        getFirstAMRMToken(credentials.getAllTokens());
-    if (amrmToken == null) {
-      throw new YarnRuntimeException(
-          "AMRMToken not found in the start container request for application:"
-              + appAttemptId.toString());
+      Token<AMRMTokenIdentifier> amrmToken =
+          getFirstAMRMToken(credentials.getAllTokens());
+      if (amrmToken == null) {
+        throw new YarnRuntimeException(
+            "AMRMToken not found in the start container request for "
+                + "application:" + appAttemptId.toString());
+      }
+
+      // Substitute the existing AMRM Token with a local one. Keep the rest of
+      // the tokens in the credentials intact.
+      Token<AMRMTokenIdentifier> localToken =
+          this.secretManager.createAndGetAMRMToken(appAttemptId);
+      credentials.addToken(localToken.getService(), localToken);
+
+      DataOutputBuffer dob = new DataOutputBuffer();
+      credentials.writeTokenStorageToStream(dob);
+      request.getContainerLaunchContext()
+          .setTokens(ByteBuffer.wrap(dob.getData(), 0, dob.getLength()));
+
+      initializePipeline(appAttemptId,
+          containerTokenIdentifierForKey.getApplicationSubmitter(), amrmToken,
+          localToken, null, false, credentials);
+
+      long endTime = clock.getTime();
+      this.metrics.succeededAppStartRequests(endTime - startTime);
+    } catch (Throwable t) {
+      this.metrics.incrFailedAppStartRequests();
+      throw t;
     }
-
-    // Substitute the existing AMRM Token with a local one. Keep the rest of the
-    // tokens in the credentials intact.
-    Token<AMRMTokenIdentifier> localToken =
-        this.secretManager.createAndGetAMRMToken(appAttemptId);
-    credentials.addToken(localToken.getService(), localToken);
-
-    DataOutputBuffer dob = new DataOutputBuffer();
-    credentials.writeTokenStorageToStream(dob);
-    request.getContainerLaunchContext().setTokens(
-        ByteBuffer.wrap(dob.getData(), 0, dob.getLength()));
-
-    initializePipeline(appAttemptId,
-        containerTokenIdentifierForKey.getApplicationSubmitter(), amrmToken,
-        localToken, null, false, credentials);
   }
 
   /**

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/test/java/org/apache/hadoop/yarn/server/nodemanager/amrmproxy/TestAMRMProxyMetrics.java

@@ -0,0 +1,156 @@
+/*
+ * 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.hadoop.yarn.server.nodemanager.amrmproxy;
+
+import org.apache.hadoop.yarn.api.protocolrecords.AllocateResponse;
+import org.apache.hadoop.yarn.api.protocolrecords.FinishApplicationMasterResponse;
+import org.apache.hadoop.yarn.api.protocolrecords.RegisterApplicationMasterResponse;
+import org.apache.hadoop.yarn.api.records.FinalApplicationStatus;
+import org.junit.Assert;
+import org.junit.BeforeClass;
+import org.junit.Test;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class TestAMRMProxyMetrics extends BaseAMRMProxyTest {
+  public static final Logger LOG =
+      LoggerFactory.getLogger(TestAMRMProxyMetrics.class);
+  private static AMRMProxyMetrics metrics;
+
+  @BeforeClass
+  public static void init() {
+    metrics = AMRMProxyMetrics.getMetrics();
+    LOG.info("Test: aggregate metrics are initialized correctly");
+
+    Assert.assertEquals(0, metrics.getFailedAppStartRequests());
+    Assert.assertEquals(0, metrics.getFailedRegisterAMRequests());
+    Assert.assertEquals(0, metrics.getFailedFinishAMRequests());
+    Assert.assertEquals(0, metrics.getFailedAllocateRequests());
+
+    Assert.assertEquals(0, metrics.getNumSucceededAppStartRequests());
+    Assert.assertEquals(0, metrics.getNumSucceededRegisterAMRequests());
+    Assert.assertEquals(0, metrics.getNumSucceededFinishAMRequests());
+    Assert.assertEquals(0, metrics.getNumSucceededAllocateRequests());
+
+    LOG.info("Test: aggregate metrics are updated correctly");
+  }
+
+  @Test
+  public void testAllocateRequestWithNullValues() throws Exception {
+    long failedAppStartRequests = metrics.getFailedAppStartRequests();
+    long failedRegisterAMRequests = metrics.getFailedRegisterAMRequests();
+    long failedFinishAMRequests = metrics.getFailedFinishAMRequests();
+    long failedAllocateRequests = metrics.getFailedAllocateRequests();
+
+    long succeededAppStartRequests = metrics.getNumSucceededAppStartRequests();
+    long succeededRegisterAMRequests =
+        metrics.getNumSucceededRegisterAMRequests();
+    long succeededFinishAMRequests = metrics.getNumSucceededFinishAMRequests();
+    long succeededAllocateRequests = metrics.getNumSucceededAllocateRequests();
+
+    int testAppId = 1;
+    RegisterApplicationMasterResponse registerResponse =
+        registerApplicationMaster(testAppId);
+    Assert.assertNotNull(registerResponse);
+    Assert
+        .assertEquals(Integer.toString(testAppId), registerResponse.getQueue());
+
+    AllocateResponse allocateResponse = allocate(testAppId);
+    Assert.assertNotNull(allocateResponse);
+
+    FinishApplicationMasterResponse finshResponse =
+        finishApplicationMaster(testAppId, FinalApplicationStatus.SUCCEEDED);
+
+    Assert.assertNotNull(finshResponse);
+    Assert.assertEquals(true, finshResponse.getIsUnregistered());
+
+    Assert.assertEquals(failedAppStartRequests,
+        metrics.getFailedAppStartRequests());
+    Assert.assertEquals(failedRegisterAMRequests,
+        metrics.getFailedRegisterAMRequests());
+    Assert.assertEquals(failedFinishAMRequests,
+        metrics.getFailedFinishAMRequests());
+    Assert.assertEquals(failedAllocateRequests,
+        metrics.getFailedAllocateRequests());
+
+    Assert.assertEquals(succeededAppStartRequests,
+        metrics.getNumSucceededAppStartRequests());
+    Assert.assertEquals(1 + succeededRegisterAMRequests,
+        metrics.getNumSucceededRegisterAMRequests());
+    Assert.assertEquals(1 + succeededFinishAMRequests,
+        metrics.getNumSucceededFinishAMRequests());
+    Assert.assertEquals(1 + succeededAllocateRequests,
+        metrics.getNumSucceededAllocateRequests());
+  }
+
+  @Test
+  public void testFinishOneApplicationMasterWithFailure() throws Exception {
+    long failedAppStartRequests = metrics.getFailedAppStartRequests();
+    long failedRegisterAMRequests = metrics.getFailedRegisterAMRequests();
+    long failedFinishAMRequests = metrics.getFailedFinishAMRequests();
+    long failedAllocateRequests = metrics.getFailedAllocateRequests();
+
+    long succeededAppStartRequests = metrics.getNumSucceededAppStartRequests();
+    long succeededRegisterAMRequests =
+        metrics.getNumSucceededRegisterAMRequests();
+    long succeededFinishAMRequests = metrics.getNumSucceededFinishAMRequests();
+    long succeededAllocateRequests = metrics.getNumSucceededAllocateRequests();
+
+    int testAppId = 1;
+    RegisterApplicationMasterResponse registerResponse =
+        registerApplicationMaster(testAppId);
+    Assert.assertNotNull(registerResponse);
+    Assert
+        .assertEquals(Integer.toString(testAppId), registerResponse.getQueue());
+
+    FinishApplicationMasterResponse finshResponse =
+        finishApplicationMaster(testAppId, FinalApplicationStatus.FAILED);
+
+    Assert.assertNotNull(finshResponse);
+
+    try {
+      // Try to finish an application master that is already finished.
+      finishApplicationMaster(testAppId, FinalApplicationStatus.SUCCEEDED);
+      Assert
+          .fail("The request to finish application master should have failed");
+    } catch (Throwable ex) {
+      // This is expected. So nothing required here.
+      LOG.info("Finish registration failed as expected because it was not "
+          + "registered");
+    }
+
+    Assert.assertEquals(failedAppStartRequests,
+        metrics.getFailedAppStartRequests());
+    Assert.assertEquals(failedRegisterAMRequests,
+        metrics.getFailedRegisterAMRequests());
+    Assert.assertEquals(1 + failedFinishAMRequests,
+        metrics.getFailedFinishAMRequests());
+    Assert.assertEquals(failedAllocateRequests,
+        metrics.getFailedAllocateRequests());
+
+    Assert.assertEquals(succeededAppStartRequests,
+        metrics.getNumSucceededAppStartRequests());
+    Assert.assertEquals(1 + succeededRegisterAMRequests,
+        metrics.getNumSucceededRegisterAMRequests());
+    Assert.assertEquals(1 + succeededFinishAMRequests,
+        metrics.getNumSucceededFinishAMRequests());
+    Assert.assertEquals(succeededAllocateRequests,
+        metrics.getNumSucceededAllocateRequests());
+  }
+}