YARN-6253. FlowAcitivityColumnPrefix.store(byte[] rowKey, ...) drops timestamp. Contributed by Haibo Chen.

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/flow/FlowActivityColumnPrefix.java

@@ -271,7 +271,7 @@ public enum FlowActivityColumnPrefix
     byte[] columnQualifier = getColumnPrefixBytes(qualifier);
     Attribute[] combinedAttributes =
         HBaseTimelineStorageUtils.combineAttributes(attributes, this.aggOp);
-    column.store(rowKey, tableMutator, columnQualifier, null, inputValue,
+    column.store(rowKey, tableMutator, columnQualifier, timestamp, inputValue,
         combinedAttributes);
   }
 }