YARN-3393. Getting application(s) goes wrong when app finishes before

starting the attempt. Contributed by Zhijie Shen

hadoop-yarn-project/CHANGES.txt

@@ -828,6 +828,9 @@ Release 2.7.0 - UNRELEASED
     YARN-3336. FileSystem memory leak in DelegationTokenRenewer.
     (Zhihai Xu via cnauroth)
 
+    YARN-3393. Getting application(s) goes wrong when app finishes before
+    starting the attempt. (Zhijie Shen via xgong)
+
 Release 2.6.0 - 2014-11-18
 
   INCOMPATIBLE CHANGES

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-applicationhistoryservice/src/main/java/org/apache/hadoop/yarn/server/applicationhistoryservice/ApplicationHistoryManagerOnTimelineStore.java

@@ -517,15 +517,14 @@ private ApplicationReportExt generateApplicationReport(TimelineEntity entity,
       if (app.appReport.getCurrentApplicationAttemptId() != null) {
         ApplicationAttemptReport appAttempt =
             getApplicationAttempt(app.appReport.getCurrentApplicationAttemptId());
-        if (appAttempt != null) {
         app.appReport.setHost(appAttempt.getHost());
         app.appReport.setRpcPort(appAttempt.getRpcPort());
         app.appReport.setTrackingUrl(appAttempt.getTrackingUrl());
         app.appReport.setOriginalTrackingUrl(appAttempt.getOriginalTrackingUrl());
       }
-      }
+    } catch (AuthorizationException | ApplicationAttemptNotFoundException e) {
-    } catch (AuthorizationException e) {
       // AuthorizationException is thrown because the user doesn't have access
+      // It's possible that the app is finished before the first attempt is created.
       app.appReport.setDiagnostics(null);
       app.appReport.setCurrentApplicationAttemptId(null);
     }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-applicationhistoryservice/src/test/java/org/apache/hadoop/yarn/server/applicationhistoryservice/TestApplicationHistoryManagerOnTimelineStore.java

@@ -76,6 +76,10 @@ public class TestApplicationHistoryManagerOnTimelineStore {
   @BeforeClass
   public static void prepareStore() throws Exception {
     store = createStore(SCALE);
+    TimelineEntities entities = new TimelineEntities();
+    entities.addEntity(createApplicationTimelineEntity(
+        ApplicationId.newInstance(0, SCALE + 1), true, false));
+    store.put(entities);
   }
 
   public static TimelineStore createStore(int scale) throws Exception {
@@ -129,9 +133,9 @@ private static void prepareTimelineStore(TimelineStore store, int scale)
       TimelineEntities entities = new TimelineEntities();
       ApplicationId appId = ApplicationId.newInstance(0, i);
       if (i == 2) {
-        entities.addEntity(createApplicationTimelineEntity(appId, true));
+        entities.addEntity(createApplicationTimelineEntity(appId, true, true));
       } else {
-        entities.addEntity(createApplicationTimelineEntity(appId, false));
+        entities.addEntity(createApplicationTimelineEntity(appId, false, true));
       }
       store.put(entities);
       for (int j = 1; j <= scale; ++j) {
@@ -215,6 +219,27 @@ public ApplicationReport run() throws Exception {
     }
   }
 
+  @Test
+  public void testGetApplicationReportWithNotAttempt() throws Exception {
+    final ApplicationId appId = ApplicationId.newInstance(0, SCALE + 1);
+    ApplicationReport app;
+    if (callerUGI == null) {
+      app = historyManager.getApplication(appId);
+    } else {
+      app =
+          callerUGI.doAs(new PrivilegedExceptionAction<ApplicationReport> () {
+            @Override
+            public ApplicationReport run() throws Exception {
+              return historyManager.getApplication(appId);
+            }
+          });
+    }
+    Assert.assertNotNull(app);
+    Assert.assertEquals(appId, app.getApplicationId());
+    Assert.assertEquals(ApplicationAttemptId.newInstance(appId, -1),
+        app.getCurrentApplicationAttemptId());
+  }
+
   @Test
   public void testGetApplicationAttemptReport() throws Exception {
     final ApplicationAttemptId appAttemptId =
@@ -308,7 +333,7 @@ public void testGetApplications() throws Exception {
     Collection<ApplicationReport> apps =
         historyManager.getAllApplications().values();
     Assert.assertNotNull(apps);
-    Assert.assertEquals(SCALE, apps.size());
+    Assert.assertEquals(SCALE + 1, apps.size());
   }
 
   @Test
@@ -408,7 +433,7 @@ public ContainerReport run() throws Exception {
   }
 
   private static TimelineEntity createApplicationTimelineEntity(
-      ApplicationId appId, boolean emptyACLs) {
+      ApplicationId appId, boolean emptyACLs, boolean noAttempt) {
     TimelineEntity entity = new TimelineEntity();
     entity.setEntityType(ApplicationMetricsConstants.ENTITY_TYPE);
     entity.setEntityId(appId.toString());
@@ -447,8 +472,10 @@ private static TimelineEntity createApplicationTimelineEntity(
         FinalApplicationStatus.UNDEFINED.toString());
     eventInfo.put(ApplicationMetricsConstants.STATE_EVENT_INFO,
         YarnApplicationState.FINISHED.toString());
+    if (noAttempt) {
       eventInfo.put(ApplicationMetricsConstants.LATEST_APP_ATTEMPT_EVENT_INFO,
           ApplicationAttemptId.newInstance(appId, 1));
+    }
     tEvent.setEventInfo(eventInfo);
     entity.addEvent(tEvent);
     return entity;