YARN-2414. RM web UI: app page will crash if app is failed before any attempt has been created. Contributed by Wangda Tan

hadoop-yarn-project/CHANGES.txt

@@ -99,6 +99,9 @@ Release 2.7.0 - UNRELEASED
     YARN-1703. Fixed ResourceManager web-proxy to close connections correctly.
     (Rohith Sharma via vinodkv)
 
+    YARN-2414. RM web UI: app page will crash if app is failed before any
+    attempt has been created (Wangda Tan via jlowe)
+
 Release 2.6.0 - 2014-11-18
 
   INCOMPATIBLE CHANGES

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/server/security/ApplicationACLsManager.java

@@ -35,6 +35,8 @@
 import org.apache.hadoop.yarn.conf.YarnConfiguration;
 import org.apache.hadoop.yarn.security.AdminACLsManager;
 
+import com.google.common.annotations.VisibleForTesting;
+
 @InterfaceAudience.Private
 public class ApplicationACLsManager {
 
@@ -48,6 +50,11 @@ public class ApplicationACLsManager {
   private final ConcurrentMap<ApplicationId, Map<ApplicationAccessType, AccessControlList>> applicationACLS
     = new ConcurrentHashMap<ApplicationId, Map<ApplicationAccessType, AccessControlList>>();
 
+  @VisibleForTesting
+  public ApplicationACLsManager() {
+    this(new Configuration());
+  }
+  
   public ApplicationACLsManager(Configuration conf) {
     this.conf = conf;
     this.adminAclsManager = new AdminACLsManager(this.conf);

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/security/QueueACLsManager.java

@@ -24,10 +24,17 @@
 import org.apache.hadoop.yarn.conf.YarnConfiguration;
 import org.apache.hadoop.yarn.server.resourcemanager.scheduler.ResourceScheduler;
 
+import com.google.common.annotations.VisibleForTesting;
+
 public class QueueACLsManager {
   private ResourceScheduler scheduler;
   private boolean isACLsEnable;
   
+  @VisibleForTesting
+  public QueueACLsManager() {
+    this(null, new Configuration());
+  }
+
   public QueueACLsManager(ResourceScheduler scheduler, Configuration conf) {
     this.scheduler = scheduler;
     this.isACLsEnable = conf.getBoolean(YarnConfiguration.YARN_ACL_ENABLE,

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/AppBlock.java

@@ -33,6 +33,7 @@
 import org.apache.hadoop.yarn.api.records.ApplicationAccessType;
 import org.apache.hadoop.yarn.api.records.ApplicationId;
 import org.apache.hadoop.yarn.api.records.QueueACL;
+import org.apache.hadoop.yarn.api.records.Resource;
 import org.apache.hadoop.yarn.server.resourcemanager.RMContext;
 import org.apache.hadoop.yarn.server.resourcemanager.ResourceManager;
 import org.apache.hadoop.yarn.server.resourcemanager.rmapp.RMApp;
@@ -45,6 +46,7 @@
 import org.apache.hadoop.yarn.server.security.ApplicationACLsManager;
 import org.apache.hadoop.yarn.util.Apps;
 import org.apache.hadoop.yarn.util.Times;
+import org.apache.hadoop.yarn.util.resource.Resources;
 import org.apache.hadoop.yarn.webapp.hamlet.Hamlet;
 import org.apache.hadoop.yarn.webapp.hamlet.Hamlet.DIV;
 import org.apache.hadoop.yarn.webapp.hamlet.Hamlet.TABLE;
@@ -113,8 +115,23 @@ protected void render(Block html) {
     setTitle(join("Application ", aid));
 
     RMAppMetrics appMerics = rmApp.getRMAppMetrics();
-    RMAppAttemptMetrics attemptMetrics =
+    
-        rmApp.getCurrentAppAttempt().getRMAppAttemptMetrics();
+    // Get attempt metrics and fields, it is possible currentAttempt of RMApp is
+    // null. In that case, we will assume resource preempted and number of Non
+    // AM container preempted on that attempt is 0
+    RMAppAttemptMetrics attemptMetrics;
+    if (null == rmApp.getCurrentAppAttempt()) {
+      attemptMetrics = null;
+    } else {
+      attemptMetrics = rmApp.getCurrentAppAttempt().getRMAppAttemptMetrics();
+    }
+    Resource attemptResourcePreempted =
+        attemptMetrics == null ? Resources.none() : attemptMetrics
+            .getResourcePreempted();
+    int attemptNumNonAMContainerPreempted =
+        attemptMetrics == null ? 0 : attemptMetrics
+            .getNumNonAMContainersPreempted();
+    
     info("Application Overview")
         ._("User:", app.getUser())
         ._("Name:", app.getName())
@@ -143,10 +160,9 @@ protected void render(Block html) {
         ._("Total Number of AM Containers Preempted:",
           String.valueOf(appMerics.getNumAMContainersPreempted()))
         ._("Resource Preempted from Current Attempt:",
-          attemptMetrics.getResourcePreempted())
+          attemptResourcePreempted)
         ._("Number of Non-AM Containers Preempted from Current Attempt:",
-          String.valueOf(attemptMetrics
+          attemptNumNonAMContainerPreempted)
-            .getNumNonAMContainersPreempted()))
         ._("Aggregate Resource Allocation:",
           String.format("%d MB-seconds, %d vcore-seconds", 
               appMerics.getMemorySeconds(), appMerics.getVcoreSeconds()));

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/TestAppPage.java

@@ -0,0 +1,90 @@
+/**
+ * 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.resourcemanager.webapp;
+
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+import java.io.IOException;
+
+import org.apache.hadoop.yarn.api.records.ApplicationId;
+import org.apache.hadoop.yarn.api.records.FinalApplicationStatus;
+import org.apache.hadoop.yarn.api.records.Resource;
+import org.apache.hadoop.yarn.api.records.YarnApplicationState;
+import org.apache.hadoop.yarn.server.resourcemanager.RMContext;
+import org.apache.hadoop.yarn.server.resourcemanager.ResourceManager;
+import org.apache.hadoop.yarn.server.resourcemanager.rmapp.RMApp;
+import org.apache.hadoop.yarn.server.resourcemanager.rmapp.RMAppMetrics;
+import org.apache.hadoop.yarn.server.resourcemanager.rmapp.RMAppState;
+import org.apache.hadoop.yarn.webapp.YarnWebParams;
+import org.apache.hadoop.yarn.webapp.test.WebAppTests;
+import org.junit.Test;
+
+import com.google.inject.Binder;
+import com.google.inject.Injector;
+import com.google.inject.Module;
+
+public class TestAppPage {
+  @Test
+  public void testAppBlockRenderWithNullCurrentAppAttempt() throws Exception {
+    final ApplicationId APP_ID = ApplicationId.newInstance(1234L, 0);
+    Injector injector;
+    
+    // init app
+    RMApp app = mock(RMApp.class);
+    when(app.getTrackingUrl()).thenReturn("http://host:123");
+    when(app.getState()).thenReturn(RMAppState.FAILED);
+    when(app.getApplicationId()).thenReturn(APP_ID);
+    when(app.getApplicationType()).thenReturn("Type");
+    when(app.getUser()).thenReturn("user");
+    when(app.getName()).thenReturn("Name");
+    when(app.getQueue()).thenReturn("queue");
+    when(app.getDiagnostics()).thenReturn(new StringBuilder());
+    when(app.getFinalApplicationStatus()).thenReturn(FinalApplicationStatus.FAILED);
+    when(app.getFinalApplicationStatus()).thenReturn(FinalApplicationStatus.FAILED);
+    when(app.getStartTime()).thenReturn(0L);
+    when(app.getFinishTime()).thenReturn(0L);
+    when(app.createApplicationState()).thenReturn(YarnApplicationState.FAILED);
+    
+    RMAppMetrics appMetrics = new RMAppMetrics(Resource.newInstance(0, 0), 0, 0, 0, 0);
+    when(app.getRMAppMetrics()).thenReturn(appMetrics);
+    
+    // initialize RM Context, and create RMApp, without creating RMAppAttempt
+    final RMContext rmContext = TestRMWebApp.mockRMContext(15, 1, 2, 8);
+    rmContext.getRMApps().put(APP_ID, app);
+    
+    injector =
+        WebAppTests.createMockInjector(RMContext.class, rmContext,
+            new Module() {
+              @Override
+              public void configure(Binder binder) {
+                try {
+                  binder.bind(ResourceManager.class).toInstance(
+                      TestRMWebApp.mockRm(rmContext));
+                } catch (IOException e) {
+                  throw new IllegalStateException(e);
+                }
+              }
+            });
+    
+    AppBlock instance = injector.getInstance(AppBlock.class);
+    instance.set(YarnWebParams.APPLICATION_ID, APP_ID.toString());
+    instance.render();
+  }
+}