YARN-2766. Made ApplicationHistoryManager return a sorted list of apps, attempts and containers. Contributed by Robert Kanter.

hadoop-yarn-project/CHANGES.txt

@@ -81,6 +81,9 @@ Release 2.7.0 - UNRELEASED
     YARN-2713. "RM Home" link in NM should point to one of the RMs in an 
     HA setup. (kasha)
 
+    YARN-2766. Made ApplicationHistoryManager return a sorted list of apps,
+    attempts and containers. (Robert Kanter via zjshen)
+
 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

@@ -21,6 +21,7 @@ package org.apache.hadoop.yarn.server.applicationhistoryservice;
 import java.io.IOException;
 import java.util.EnumSet;
 import java.util.HashMap;
+import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
 
@@ -102,7 +103,7 @@ public class ApplicationHistoryManagerOnTimelineStore extends AbstractService
         null, null, Long.MAX_VALUE, EnumSet.allOf(Field.class),
         UserGroupInformation.getLoginUser());
     Map<ApplicationId, ApplicationReport> apps =
-        new HashMap<ApplicationId, ApplicationReport>();
+        new LinkedHashMap<ApplicationId, ApplicationReport>();
     if (entities != null && entities.getEntities() != null) {
       for (TimelineEntity entity : entities.getEntities()) {
         ApplicationReportExt app =
@@ -128,7 +129,7 @@ public class ApplicationHistoryManagerOnTimelineStore extends AbstractService
         Long.MAX_VALUE, EnumSet.allOf(Field.class),
         UserGroupInformation.getLoginUser());
     Map<ApplicationAttemptId, ApplicationAttemptReport> appAttempts =
-        new HashMap<ApplicationAttemptId, ApplicationAttemptReport>();
+        new LinkedHashMap<ApplicationAttemptId, ApplicationAttemptReport>();
     for (TimelineEntity entity : entities.getEntities()) {
       ApplicationAttemptReport appAttempt =
           convertToApplicationAttemptReport(entity);
@@ -198,7 +199,7 @@ public class ApplicationHistoryManagerOnTimelineStore extends AbstractService
         null, null, Long.MAX_VALUE, EnumSet.allOf(Field.class),
         UserGroupInformation.getLoginUser());
     Map<ContainerId, ContainerReport> containers =
-        new HashMap<ContainerId, ContainerReport>();
+        new LinkedHashMap<ContainerId, ContainerReport>();
     if (entities != null && entities.getEntities() != null) {
       for (TimelineEntity entity : entities.getEntities()) {
         ContainerReport container = convertToContainerReport(

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

@@ -168,7 +168,7 @@ public class TestApplicationHistoryClientService {
         clientService.getClientHandler().getContainers(request);
     List<ContainerReport> containers = response.getContainerList();
     Assert.assertNotNull(containers);
-    Assert.assertEquals(containerId, containers.get(1).getContainerId());
-    Assert.assertEquals(containerId1, containers.get(0).getContainerId());
+    Assert.assertEquals(containerId, containers.get(0).getContainerId());
+    Assert.assertEquals(containerId1, containers.get(1).getContainerId());
   }
 }