YARN-4183. Reverting the patch to fix behaviour change.

Revert "YARN-4183. Enabling generic application history forces every job to get a timeline service delegation token (jeagles)"

This reverts commit 42bc525acb78088ed952e92aa49408413937de86.

hadoop-yarn-project/CHANGES.txt

@@ -1107,9 +1107,6 @@ Release 2.7.2 - UNRELEASED
     YARN-2902. Killing a container that is localizing can orphan resources in
     the DOWNLOADING state (Varun Saxena via jlowe)
 
-    YARN-4183. Enabling generic application history forces every job to get a
-    timeline service delegation token (Mit Desai via jeagles)
-
     YARN-4313. Race condition in MiniMRYarnCluster when getting history server
     address. (Jian He via xgong)
 

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

@@ -77,8 +77,8 @@ public class SystemMetricsPublisher extends CompositeService {
   @Override
   protected void serviceInit(Configuration conf) throws Exception {
     publishSystemMetrics =
-        conf.getBoolean(YarnConfiguration.APPLICATION_HISTORY_ENABLED,
-            YarnConfiguration.DEFAULT_APPLICATION_HISTORY_ENABLED) &&
+        conf.getBoolean(YarnConfiguration.TIMELINE_SERVICE_ENABLED,
+            YarnConfiguration.DEFAULT_TIMELINE_SERVICE_ENABLED) &&
         conf.getBoolean(YarnConfiguration.RM_SYSTEM_METRICS_PUBLISHER_ENABLED,
             YarnConfiguration.DEFAULT_RM_SYSTEM_METRICS_PUBLISHER_ENABLED);
 

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

@@ -73,7 +73,7 @@ public class TestSystemMetricsPublisher {
   @BeforeClass
   public static void setup() throws Exception {
     YarnConfiguration conf = new YarnConfiguration();
-    conf.setBoolean(YarnConfiguration.APPLICATION_HISTORY_ENABLED, true);
+    conf.setBoolean(YarnConfiguration.TIMELINE_SERVICE_ENABLED, true);
     conf.setBoolean(YarnConfiguration.RM_SYSTEM_METRICS_PUBLISHER_ENABLED, true);
     conf.setClass(YarnConfiguration.TIMELINE_SERVICE_STORE,
         MemoryTimelineStore.class, TimelineStore.class);