YARN-1462. Made RM write application tags to timeline server and exposed them to users via generic history web UI and REST API. Contributed by Xuan Gong.

(cherry picked from commit a9f986bc5a41ab74171da1076d10e83c5adc284f)

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/main/java/org/apache/hadoop/mapred/NotRunningJob.java

@@ -90,7 +90,7 @@ public class NotRunningJob implements MRClientProtocol {
     return ApplicationReport.newInstance(unknownAppId, unknownAttemptId,
       "N/A", "N/A", "N/A", "N/A", 0, null, YarnApplicationState.NEW, "N/A",
       "N/A", 0, 0, FinalApplicationStatus.UNDEFINED, null, "N/A", 0.0f,
-      YarnConfiguration.DEFAULT_APPLICATION_TYPE, null);
+      YarnConfiguration.DEFAULT_APPLICATION_TYPE, null, null);
   }
 
   NotRunningJob(ApplicationReport applicationReport, JobState jobState) {

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapred/TestClientServiceDelegate.java

@@ -516,7 +516,7 @@ public class TestClientServiceDelegate {
     return ApplicationReport.newInstance(appId, attemptId, "user", "queue",
       "appname", "host", 124, null, YarnApplicationState.FINISHED,
       "diagnostics", "url", 0, 0, FinalApplicationStatus.SUCCEEDED, null,
-      "N/A", 0.0f, YarnConfiguration.DEFAULT_APPLICATION_TYPE, null);
+      "N/A", 0.0f, YarnConfiguration.DEFAULT_APPLICATION_TYPE, null, null);
   }
 
   private ApplicationReport getRunningApplicationReport(String host, int port) {
@@ -526,7 +526,7 @@ public class TestClientServiceDelegate {
     return ApplicationReport.newInstance(appId, attemptId, "user", "queue",
       "appname", host, port, null, YarnApplicationState.RUNNING, "diagnostics",
       "url", 0, 0, FinalApplicationStatus.UNDEFINED, null, "N/A", 0.0f,
-      YarnConfiguration.DEFAULT_APPLICATION_TYPE, null);
+      YarnConfiguration.DEFAULT_APPLICATION_TYPE, null, null);
   }
 
   private ResourceMgrDelegate getRMDelegate() throws IOException {

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapred/TestYARNRunner.java

@@ -196,7 +196,7 @@ public class TestYARNRunner extends TestCase {
             ApplicationReport.newInstance(appId, null, "tmp", "tmp", "tmp",
                 "tmp", 0, null, YarnApplicationState.FINISHED, "tmp", "tmp",
                 0l, 0l, FinalApplicationStatus.SUCCEEDED, null, null, 0f,
-                "tmp", null));
+                "tmp", null, null));
     yarnRunner.killJob(jobId);
     verify(clientDelegate).killJob(jobId);
   }

hadoop-yarn-project/CHANGES.txt

@@ -448,6 +448,9 @@ Release 2.7.1 - UNRELEASED
     YARN-3723. Need to clearly document primaryFilter and otherInfo value type.
     (Zhijie Shen via xgong)
 
+    YARN-1462. Made RM write application tags to timeline server and exposed them
+    to users via generic history web UI and REST API. (Xuan Gong via zjshen)
+
   OPTIMIZATIONS
 
   BUG FIXES

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/api/records/ApplicationReport.java

@@ -59,7 +59,8 @@ public abstract class ApplicationReport {
       YarnApplicationState state, String diagnostics, String url,
       long startTime, long finishTime, FinalApplicationStatus finalStatus,
       ApplicationResourceUsageReport appResources, String origTrackingUrl,
-      float progress, String applicationType, Token amRmToken) {
+      float progress, String applicationType, Token amRmToken,
+      Set<String> tags) {
     ApplicationReport report = Records.newRecord(ApplicationReport.class);
     report.setApplicationId(applicationId);
     report.setCurrentApplicationAttemptId(applicationAttemptId);
@@ -80,6 +81,7 @@ public abstract class ApplicationReport {
     report.setProgress(progress);
     report.setApplicationType(applicationType);
     report.setAMRMToken(amRmToken);
+    report.setApplicationTags(tags);
     return report;
   }
 

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/test/java/org/apache/hadoop/yarn/client/ProtocolHATestBase.java

@@ -647,7 +647,7 @@ public abstract class ProtocolHATestBase extends ClientBaseWithFixes {
               "fakeQueue", "fakeApplicationName", "localhost", 0, null,
               YarnApplicationState.FINISHED, "fake an application report", "",
               1000l, 1200l, FinalApplicationStatus.FAILED, null, "", 50f,
-              "fakeApplicationType", null);
+              "fakeApplicationType", null, null);
       return report;
     }
 

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/test/java/org/apache/hadoop/yarn/client/api/impl/TestAHSClient.java

@@ -334,7 +334,7 @@ public class TestAHSClient {
             "queue", "appname", "host", 124, null,
             YarnApplicationState.RUNNING, "diagnostics", "url", 0, 0,
             FinalApplicationStatus.SUCCEEDED, null, "N/A", 0.53789f, "YARN",
-            null);
+            null, null);
       List<ApplicationReport> applicationReports =
           new ArrayList<ApplicationReport>();
       applicationReports.add(newApplicationReport);
@@ -391,7 +391,7 @@ public class TestAHSClient {
             "queue2", "appname2", "host2", 125, null,
             YarnApplicationState.FINISHED, "diagnostics2", "url2", 2, 2,
             FinalApplicationStatus.SUCCEEDED, null, "N/A", 0.63789f,
-            "NON-YARN", null);
+            "NON-YARN", null, null);
       applicationReports.add(newApplicationReport2);
 
       ApplicationId applicationId3 = ApplicationId.newInstance(1234, 7);
@@ -401,7 +401,7 @@ public class TestAHSClient {
             "queue3", "appname3", "host3", 126, null,
             YarnApplicationState.RUNNING, "diagnostics3", "url3", 3, 3,
             FinalApplicationStatus.SUCCEEDED, null, "N/A", 0.73789f,
-            "MAPREDUCE", null);
+            "MAPREDUCE", null, null);
       applicationReports.add(newApplicationReport3);
 
       ApplicationId applicationId4 = ApplicationId.newInstance(1234, 8);
@@ -411,7 +411,7 @@ public class TestAHSClient {
             "queue4", "appname4", "host4", 127, null,
             YarnApplicationState.FAILED, "diagnostics4", "url4", 4, 4,
             FinalApplicationStatus.SUCCEEDED, null, "N/A", 0.83789f,
-            "NON-MAPREDUCE", null);
+            "NON-MAPREDUCE", null, null);
       applicationReports.add(newApplicationReport4);
       reports = applicationReports;
     }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/test/java/org/apache/hadoop/yarn/client/api/impl/TestYarnClient.java

@@ -613,7 +613,8 @@ public class TestYarnClient {
           applicationId, ApplicationAttemptId.newInstance(applicationId, 1),
           "user", "queue", "appname", "host", 124, null,
           YarnApplicationState.RUNNING, "diagnostics", "url", 0, 0,
-          FinalApplicationStatus.SUCCEEDED, null, "N/A", 0.53789f, "YARN", null);
+          FinalApplicationStatus.SUCCEEDED, null, "N/A", 0.53789f, "YARN", null,
+          null);
       List<ApplicationReport> applicationReports = new ArrayList<ApplicationReport>();
       applicationReports.add(newApplicationReport);
       List<ApplicationAttemptReport> appAttempts = new ArrayList<ApplicationAttemptReport>();
@@ -689,7 +690,7 @@ public class TestYarnClient {
           "user2", "queue2", "appname2", "host2", 125, null,
           YarnApplicationState.FINISHED, "diagnostics2", "url2", 2, 2,
           FinalApplicationStatus.SUCCEEDED, null, "N/A", 0.63789f, "NON-YARN", 
-        null);
+          null, null);
       applicationReports.add(newApplicationReport2);
 
       ApplicationId applicationId3 = ApplicationId.newInstance(1234, 7);
@@ -698,7 +699,7 @@ public class TestYarnClient {
           "user3", "queue3", "appname3", "host3", 126, null,
           YarnApplicationState.RUNNING, "diagnostics3", "url3", 3, 3,
           FinalApplicationStatus.SUCCEEDED, null, "N/A", 0.73789f, "MAPREDUCE",
-        null);
+          null, null);
       applicationReports.add(newApplicationReport3);
 
       ApplicationId applicationId4 = ApplicationId.newInstance(1234, 8);
@@ -709,7 +710,7 @@ public class TestYarnClient {
               "user4", "queue4", "appname4", "host4", 127, null,
               YarnApplicationState.FAILED, "diagnostics4", "url4", 4, 4,
               FinalApplicationStatus.SUCCEEDED, null, "N/A", 0.83789f,
-              "NON-MAPREDUCE", null);
+              "NON-MAPREDUCE", null, null);
       applicationReports.add(newApplicationReport4);
       return applicationReports;
     }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/test/java/org/apache/hadoop/yarn/client/cli/TestYarnCLI.java

@@ -104,7 +104,7 @@ public class TestYarnCLI {
           "user", "queue", "appname", "host", 124, null,
           YarnApplicationState.FINISHED, "diagnostics", "url", 0, 0,
           FinalApplicationStatus.SUCCEEDED, usageReport, "N/A", 0.53789f, "YARN",
-          null);
+          null, null);
       newApplicationReport.setLogAggregationStatus(LogAggregationStatus.SUCCEEDED);
       when(client.getApplicationReport(any(ApplicationId.class))).thenReturn(
           newApplicationReport);
@@ -350,7 +350,8 @@ public class TestYarnCLI {
         applicationId, ApplicationAttemptId.newInstance(applicationId, 1),
         "user", "queue", "appname", "host", 124, null,
         YarnApplicationState.RUNNING, "diagnostics", "url", 0, 0,
-        FinalApplicationStatus.SUCCEEDED, null, "N/A", 0.53789f, "YARN", null);
+        FinalApplicationStatus.SUCCEEDED, null, "N/A", 0.53789f, "YARN", null,
+        null);
     List<ApplicationReport> applicationReports = new ArrayList<ApplicationReport>();
     applicationReports.add(newApplicationReport);
 
@@ -360,7 +361,7 @@ public class TestYarnCLI {
         "user2", "queue2", "appname2", "host2", 125, null,
         YarnApplicationState.FINISHED, "diagnostics2", "url2", 2, 2,
         FinalApplicationStatus.SUCCEEDED, null, "N/A", 0.63789f, "NON-YARN", 
-      null);
+        null, null);
     applicationReports.add(newApplicationReport2);
 
     ApplicationId applicationId3 = ApplicationId.newInstance(1234, 7);
@@ -369,7 +370,7 @@ public class TestYarnCLI {
         "user3", "queue3", "appname3", "host3", 126, null,
         YarnApplicationState.RUNNING, "diagnostics3", "url3", 3, 3,
         FinalApplicationStatus.SUCCEEDED, null, "N/A", 0.73789f, "MAPREDUCE", 
-        null);
+        null, null);
     applicationReports.add(newApplicationReport3);
 
     ApplicationId applicationId4 = ApplicationId.newInstance(1234, 8);
@@ -378,7 +379,7 @@ public class TestYarnCLI {
         "user4", "queue4", "appname4", "host4", 127, null,
         YarnApplicationState.FAILED, "diagnostics4", "url4", 4, 4,
         FinalApplicationStatus.SUCCEEDED, null, "N/A", 0.83789f, "NON-MAPREDUCE",
-        null);
+        null, null);
     applicationReports.add(newApplicationReport4);
 
     ApplicationId applicationId5 = ApplicationId.newInstance(1234, 9);
@@ -387,7 +388,7 @@ public class TestYarnCLI {
         "user5", "queue5", "appname5", "host5", 128, null,
         YarnApplicationState.ACCEPTED, "diagnostics5", "url5", 5, 5,
         FinalApplicationStatus.KILLED, null, "N/A", 0.93789f, "HIVE",
-        null);
+        null, null);
     applicationReports.add(newApplicationReport5);
 
     ApplicationId applicationId6 = ApplicationId.newInstance(1234, 10);
@@ -396,7 +397,7 @@ public class TestYarnCLI {
         "user6", "queue6", "appname6", "host6", 129, null,
         YarnApplicationState.SUBMITTED, "diagnostics6", "url6", 6, 6,
         FinalApplicationStatus.KILLED, null, "N/A", 0.99789f, "PIG",
-        null);
+        null, null);
     applicationReports.add(newApplicationReport6);
 
     // Test command yarn application -list
@@ -820,7 +821,8 @@ public class TestYarnCLI {
         applicationId, ApplicationAttemptId.newInstance(applicationId, 1),
         "user", "queue", "appname", "host", 124, null,
         YarnApplicationState.FINISHED, "diagnostics", "url", 0, 0,
-        FinalApplicationStatus.SUCCEEDED, null, "N/A", 0.53789f, "YARN", null);
+        FinalApplicationStatus.SUCCEEDED, null, "N/A", 0.53789f, "YARN", null,
+        null);
     when(client.getApplicationReport(any(ApplicationId.class))).thenReturn(
         newApplicationReport2);
     int result = cli.run(new String[] { "application","-kill", applicationId.toString() });
@@ -833,7 +835,8 @@ public class TestYarnCLI {
         applicationId, ApplicationAttemptId.newInstance(applicationId, 1),
         "user", "queue", "appname", "host", 124, null,
         YarnApplicationState.RUNNING, "diagnostics", "url", 0, 0,
-        FinalApplicationStatus.SUCCEEDED, null, "N/A", 0.53789f, "YARN", null);
+        FinalApplicationStatus.SUCCEEDED, null, "N/A", 0.53789f, "YARN", null,
+        null);
     when(client.getApplicationReport(any(ApplicationId.class))).thenReturn(
         newApplicationReport);
     result = cli.run(new String[] { "application","-kill", applicationId.toString() });
@@ -868,7 +871,8 @@ public class TestYarnCLI {
         applicationId, ApplicationAttemptId.newInstance(applicationId, 1),
         "user", "queue", "appname", "host", 124, null,
         YarnApplicationState.FINISHED, "diagnostics", "url", 0, 0,
-        FinalApplicationStatus.SUCCEEDED, null, "N/A", 0.53789f, "YARN", null);
+        FinalApplicationStatus.SUCCEEDED, null, "N/A", 0.53789f, "YARN", null,
+        null);
     when(client.getApplicationReport(any(ApplicationId.class))).thenReturn(
         newApplicationReport2);
     int result = cli.run(new String[] { "application", "-movetoqueue",
@@ -883,7 +887,8 @@ public class TestYarnCLI {
         applicationId, ApplicationAttemptId.newInstance(applicationId, 1),
         "user", "queue", "appname", "host", 124, null,
         YarnApplicationState.RUNNING, "diagnostics", "url", 0, 0,
-        FinalApplicationStatus.SUCCEEDED, null, "N/A", 0.53789f, "YARN", null);
+        FinalApplicationStatus.SUCCEEDED, null, "N/A", 0.53789f, "YARN", null,
+        null);
     when(client.getApplicationReport(any(ApplicationId.class))).thenReturn(
         newApplicationReport);
     result = cli.run(new String[] { "application", "-movetoqueue",

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/test/java/org/apache/hadoop/yarn/api/TestApplicatonReport.java

@@ -58,7 +58,8 @@ public class TestApplicatonReport {
         ApplicationReport.newInstance(appId, appAttemptId, "user", "queue",
           "appname", "host", 124, null, YarnApplicationState.FINISHED,
           "diagnostics", "url", 0, 0, FinalApplicationStatus.SUCCEEDED, null,
-          "N/A", 0.53789f, YarnConfiguration.DEFAULT_APPLICATION_TYPE, null);
+          "N/A", 0.53789f, YarnConfiguration.DEFAULT_APPLICATION_TYPE, null,
+          null);
     return appReport;
   }
 

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

@@ -139,7 +139,7 @@ public class ApplicationHistoryManagerImpl extends AbstractService implements
       appHistory.getYarnApplicationState(), appHistory.getDiagnosticsInfo(),
       trackingUrl, appHistory.getStartTime(), appHistory.getFinishTime(),
       appHistory.getFinalApplicationStatus(), null, "", 100,
-      appHistory.getApplicationType(), null);
+      appHistory.getApplicationType(), null, null);
   }
 
   private ApplicationAttemptHistoryData getLastAttempt(ApplicationId appId)

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

@@ -19,11 +19,14 @@
 package org.apache.hadoop.yarn.server.applicationhistoryservice;
 
 import java.io.IOException;
+import java.util.Collection;
 import java.util.EnumSet;
 import java.util.HashMap;
+import java.util.HashSet;
 import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.Set;
 
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
@@ -249,6 +252,7 @@ public class ApplicationHistoryManagerOnTimelineStore extends AbstractService
     FinalApplicationStatus finalStatus = FinalApplicationStatus.UNDEFINED;
     YarnApplicationState state = YarnApplicationState.ACCEPTED;
     ApplicationResourceUsageReport appResources = null;
+    Set<String> appTags = null;
     Map<ApplicationAccessType, String> appViewACLs =
         new HashMap<ApplicationAccessType, String>();
     Map<String, Object> entityInfo = entity.getOtherInfo();
@@ -270,7 +274,7 @@ public class ApplicationHistoryManagerOnTimelineStore extends AbstractService
             ConverterUtils.toApplicationId(entity.getEntityId()),
             latestApplicationAttemptId, user, queue, name, null, -1, null, state,
             diagnosticsInfo, null, createdTime, finishedTime, finalStatus, null,
-            null, progress, type, null), appViewACLs);
+            null, progress, type, null, appTags), appViewACLs);
       }
       if (entityInfo.containsKey(ApplicationMetricsConstants.QUEUE_ENTITY_INFO)) {
         queue =
@@ -295,6 +299,17 @@ public class ApplicationHistoryManagerOnTimelineStore extends AbstractService
         appResources=ApplicationResourceUsageReport
             .newInstance(0, 0, null, null, null, memorySeconds, vcoreSeconds);
       }
+      if (entityInfo.containsKey(ApplicationMetricsConstants.APP_TAGS_INFO)) {
+        appTags = new HashSet<String>();
+        Object obj = entityInfo.get(ApplicationMetricsConstants.APP_TAGS_INFO);
+        if (obj != null && obj instanceof Collection<?>) {
+          for(Object o : (Collection<?>)obj) {
+            if (o != null) {
+              appTags.add(o.toString());
+            }
+          }
+        }
+      }
     }
     List<TimelineEvent> events = entity.getEvents();
     if (events != null) {
@@ -347,7 +362,7 @@ public class ApplicationHistoryManagerOnTimelineStore extends AbstractService
         ConverterUtils.toApplicationId(entity.getEntityId()),
         latestApplicationAttemptId, user, queue, name, null, -1, null, state,
         diagnosticsInfo, null, createdTime, finishedTime, finalStatus, appResources,
-        null, progress, type, null), appViewACLs);
+        null, progress, type, null, appTags), appViewACLs);
   }
 
   private static ApplicationAttemptReport convertToApplicationAttemptReport(

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

@@ -22,7 +22,9 @@ import java.security.PrivilegedExceptionAction;
 import java.util.Arrays;
 import java.util.Collection;
 import java.util.HashMap;
+import java.util.HashSet;
 import java.util.Map;
+import java.util.Set;
 
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.security.SaslRpcServer.AuthMethod;
@@ -185,6 +187,9 @@ public class TestApplicationHistoryManagerOnTimelineStore {
       Assert.assertEquals(Integer.MAX_VALUE + 3L
           + +app.getApplicationId().getId(), app.getFinishTime());
       Assert.assertTrue(Math.abs(app.getProgress() - 1.0F) < 0.0001);
+      Assert.assertEquals(2, app.getApplicationTags().size());
+      Assert.assertTrue(app.getApplicationTags().contains("Test_APP_TAGS_1"));
+      Assert.assertTrue(app.getApplicationTags().contains("Test_APP_TAGS_2"));
       // App 2 doesn't have the ACLs, such that the default ACLs " " will be used.
       // Nobody except admin and owner has access to the details of the app.
       if ((i ==  1 && callerUGI != null &&
@@ -471,6 +476,10 @@ public class TestApplicationHistoryManagerOnTimelineStore {
       entityInfo.put(ApplicationMetricsConstants.APP_VIEW_ACLS_ENTITY_INFO,
           "user2");
     }
+    Set<String> appTags = new HashSet<String>();
+    appTags.add("Test_APP_TAGS_1");
+    appTags.add("Test_APP_TAGS_2");
+    entityInfo.put(ApplicationMetricsConstants.APP_TAGS_INFO, appTags);
     entity.setOtherInfo(entityInfo);
     TimelineEvent tEvent = new TimelineEvent();
     tEvent.setEventType(ApplicationMetricsConstants.CREATED_EVENT_TYPE);

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/src/main/java/org/apache/hadoop/yarn/server/metrics/ApplicationMetricsConstants.java

@@ -73,4 +73,5 @@ public class ApplicationMetricsConstants {
   public static final String LATEST_APP_ATTEMPT_EVENT_INFO =
       "YARN_APPLICATION_LATEST_APP_ATTEMPT";
 
+  public static final String APP_TAGS_INFO = "YARN_APPLICATION_TAGS";
 }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/metrics/ApplicationCreatedEvent.java

@@ -18,6 +18,8 @@
 
 package org.apache.hadoop.yarn.server.resourcemanager.metrics;
 
+import java.util.Set;
+
 import org.apache.hadoop.yarn.api.records.ApplicationId;
 
 public class ApplicationCreatedEvent extends
@@ -29,6 +31,7 @@ public class ApplicationCreatedEvent extends
   private String user;
   private String queue;
   private long submittedTime;
+  private Set<String> appTags;
 
   public ApplicationCreatedEvent(ApplicationId appId,
       String name,
@@ -36,7 +39,8 @@ public class ApplicationCreatedEvent extends
       String user,
       String queue,
       long submittedTime,
-      long createdTime) {
+      long createdTime,
+      Set<String> appTags) {
     super(SystemMetricsEventType.APP_CREATED, createdTime);
     this.appId = appId;
     this.name = name;
@@ -44,6 +48,7 @@ public class ApplicationCreatedEvent extends
     this.user = user;
     this.queue = queue;
     this.submittedTime = submittedTime;
+    this.appTags = appTags;
   }
 
   @Override
@@ -75,4 +80,7 @@ public class ApplicationCreatedEvent extends
     return submittedTime;
   }
 
+  public Set<String> getAppTags() {
+    return appTags;
+  }
 }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/metrics/SystemMetricsPublisher.java

@@ -106,7 +106,7 @@ public class SystemMetricsPublisher extends CompositeService {
               app.getUser(),
               app.getQueue(),
               app.getSubmitTime(),
-              createdTime));
+              createdTime, app.getApplicationTags()));
     }
   }
 
@@ -251,6 +251,8 @@ public class SystemMetricsPublisher extends CompositeService {
         event.getQueue());
     entityInfo.put(ApplicationMetricsConstants.SUBMITTED_TIME_ENTITY_INFO,
         event.getSubmittedTime());
+    entityInfo.put(ApplicationMetricsConstants.APP_TAGS_INFO,
+        event.getAppTags());
     entity.setOtherInfo(entityInfo);
     TimelineEvent tEvent = new TimelineEvent();
     tEvent.setEventType(

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/applicationsmanager/MockAsm.java

@@ -301,7 +301,7 @@ public abstract class MockAsm extends MockApps {
             getName(), null, 0, null, null, getDiagnostics().toString(), 
             getTrackingUrl(), getStartTime(), getFinishTime(), 
             getFinalApplicationStatus(), usageReport , null, getProgress(),
-            type, null);
+            type, null, null);
         return report;
       }
 

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/metrics/TestSystemMetricsPublisher.java

@@ -21,7 +21,11 @@ package org.apache.hadoop.yarn.server.resourcemanager.metrics;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.when;
 
+import java.util.Collection;
 import java.util.EnumSet;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
 
 import org.apache.hadoop.yarn.api.records.ApplicationAttemptId;
 import org.apache.hadoop.yarn.api.records.ApplicationId;
@@ -143,6 +147,8 @@ public class TestSystemMetricsPublisher {
       Assert.assertEquals(app.getSubmitTime(),
           entity.getOtherInfo().get(
               ApplicationMetricsConstants.SUBMITTED_TIME_ENTITY_INFO));
+      Assert.assertTrue(verifyAppTags(app.getApplicationTags(),
+          entity.getOtherInfo()));
       if (i == 1) {
         Assert.assertEquals("uers1,user2",
             entity.getOtherInfo().get(
@@ -352,6 +358,10 @@ public class TestSystemMetricsPublisher {
         FinalApplicationStatus.UNDEFINED);
     when(app.getRMAppMetrics()).thenReturn(
         new RMAppMetrics(null, 0, 0, Integer.MAX_VALUE, Long.MAX_VALUE));
+    Set<String> appTags = new HashSet<String>();
+    appTags.add("test");
+    appTags.add("tags");
+    when(app.getApplicationTags()).thenReturn(appTags);
     return app;
   }
 
@@ -392,4 +402,31 @@ public class TestSystemMetricsPublisher {
     return container;
   }
 
+  private static boolean verifyAppTags(Set<String> appTags,
+      Map<String, Object> entityInfo) {
+    if (!entityInfo.containsKey(ApplicationMetricsConstants.APP_TAGS_INFO)) {
+      return false;
+    }
+    Object obj = entityInfo.get(ApplicationMetricsConstants.APP_TAGS_INFO);
+    if (obj instanceof Collection<?>) {
+      Collection<?> collection = (Collection<?>) obj;
+      if (collection.size() != appTags.size()) {
+        return false;
+      }
+      for (String appTag : appTags) {
+        boolean match = false;
+        for (Object o : collection) {
+          if (o.toString().equals(appTag)) {
+            match = true;
+            break;
+          }
+        }
+        if (!match) {
+          return false;
+        }
+      }
+      return true;
+    }
+    return false;
+  }
 }

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

@@ -253,7 +253,7 @@ public class TestRMWebApp {
               app.getStartTime(), app.getFinishTime(),
               app.getFinalApplicationStatus(),
               (ApplicationResourceUsageReport) null, app.getTrackingUrl(),
-              app.getProgress(), app.getApplicationType(), (Token) null);
+              app.getProgress(), app.getApplicationType(), (Token) null, null);
       appReports.add(appReport);
     }
     GetApplicationsResponse response = mock(GetApplicationsResponse.class);

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-site/src/site/markdown/TimelineServer.md

@@ -1125,7 +1125,27 @@ Response Body:
           "submittedTime":1430424769395,
           "startedTime":1430424769395,
           "finishedTime":1430424776594,
-          "elapsedTime":7199
+          "elapsedTime":7199},
+          {
+          "appId":"application_1430424020775_0001",
+          "currentAppAttemptId":"appattempt_1430424020775_0001_000001",
+          "user":"zshen",
+          "name":"QuasiMonteCarlo",
+          "queue":"default",
+          "type":"MAPREDUCE",
+          "host":"localhost",
+          "rpcPort":56264,
+          "appState":"FINISHED",
+          "progress":100.0,
+          "diagnosticsInfo":"",
+          "originalTrackingUrl":"http://d-69-91-129-173.dhcp4.washington.edu:19888/jobhistory/job/job_1430424020775_0001",
+          "trackingUrl":"http://d-69-91-129-173.dhcp4.washington.edu:8088/proxy/application_1430424020775_0001/",
+          "finalAppStatus":"SUCCEEDED",
+          "submittedTime":1430424053809,
+          "startedTime":1430424072153,
+          "finishedTime":1430424776594,
+          "elapsedTime":18344,
+          "applicationTags":"mrapplication,ta-example"
           }
       ]
     }
@@ -1227,6 +1247,7 @@ Response Body:
         <startedTime>1430424053809</startedTime>
         <finishedTime>1430424072153</finishedTime>
         <elapsedTime>18344</elapsedTime>
+        <applicationTags>mrapplication,ta-example</applicationTags>
       </app>
     </apps>
 
@@ -1275,7 +1296,8 @@ None
 | `allocatedVCores` | int | The sum of virtual cores allocated to the application's running containers |
 | `currentAppAttemptId` | string | The latest application attempt ID |
 | `host` | string | The host of the ApplicationMaster |
-| `rpcPort` | int | The RPC port of the ApplicationMaster; zero if no IPC service declared. |
+| `rpcPort` | int | The RPC port of the ApplicationMaster; zero if no IPC service declared |
+| `applicationTags` | string | The application tags. |
 
 ### Response Examples:
 
@@ -1311,7 +1333,8 @@ Response Body:
       "submittedTime": 1430424053809,
       "startedTime": 1430424053809,
       "finishedTime": 1430424072153,
-      "elapsedTime": 18344
+      "elapsedTime": 18344,
+      "applicationTags": mrapplication,tag-example
     }
 
 #### XML response
@@ -1349,6 +1372,7 @@ Response Body:
        <startedTime>1430424053809</startedTime>
        <finishedTime>1430424072153</finishedTime>
        <elapsedTime>18344</elapsedTime>
+       <applicationTags>mrapplication,ta-example</applicationTags>
      </app>
 
 ## <a name="REST_API_APPLICATION_ATTEMPT_LIST"></a>Application Attempt List