YARN-5928. Move ATSv2 HBase backend code into a new module that is only dependent at runtime by yarn servers. Contributed by Haibo Chen.

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

@@ -24,6 +24,8 @@ import org.apache.hadoop.yarn.api.records.ApplicationId;
 import org.apache.hadoop.yarn.conf.YarnConfiguration;
 import org.apache.hadoop.yarn.server.api.records.AppCollectorData;
 import org.apache.hadoop.yarn.server.resourcemanager.rmapp.RMApp;
+import org.apache.hadoop.yarn.server.timelineservice.storage.FileSystemTimelineWriterImpl;
+import org.apache.hadoop.yarn.server.timelineservice.storage.TimelineWriter;
 import org.junit.Before;
 import org.junit.Test;
 
@@ -47,8 +49,12 @@ public class TestRMHATimelineCollectors extends RMHATestBase {
     super.setup();
     confForRM1.setBoolean(YarnConfiguration.TIMELINE_SERVICE_ENABLED, true);
     confForRM2.setBoolean(YarnConfiguration.TIMELINE_SERVICE_ENABLED, true);
+    confForRM1.setClass(YarnConfiguration.TIMELINE_SERVICE_WRITER_CLASS,
+        FileSystemTimelineWriterImpl.class, TimelineWriter.class);
     confForRM1.setFloat(YarnConfiguration.TIMELINE_SERVICE_VERSION, 2.0f);
     confForRM2.setFloat(YarnConfiguration.TIMELINE_SERVICE_VERSION, 2.0f);
+    confForRM2.setClass(YarnConfiguration.TIMELINE_SERVICE_WRITER_CLASS,
+        FileSystemTimelineWriterImpl.class, TimelineWriter.class);
   }
 
   @Test

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/package-info.java

@@ -17,12 +17,12 @@
  */
 
 /**
- * Package org.apache.hadoop.server.timelineservice contains classes to be used
- * across timeline reader and collector.
+ * Package org.apache.hadoop.yarn.server.timelineservice.storage contains
+ * classes which define and implement reading and writing to backend storage.
  */
 @InterfaceAudience.Private
 @InterfaceStability.Unstable
 package org.apache.hadoop.yarn.server.timelineservice.storage;
 
 import org.apache.hadoop.classification.InterfaceAudience;
-import org.apache.hadoop.classification.InterfaceStability;
+import org.apache.hadoop.classification.InterfaceStability;

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-site/src/site/markdown/TimelineServiceV2.md

@@ -216,7 +216,7 @@ is needed for the `flowrun` table creation in the schema creator. The default HD
 For example,
 
     hadoop fs -mkdir /hbase/coprocessor
-    hadoop fs -put hadoop-yarn-server-timelineservice-3.0.0-alpha1-SNAPSHOT.jar
+    hadoop fs -put hadoop-yarn-server-timelineservice-hbase-3.0.0-alpha1-SNAPSHOT.jar
            /hbase/coprocessor/hadoop-yarn-server-timelineservice.jar