YARN-6850 Ensure that supplemented timestamp is stored only for flow run metrics (Contributed by Varun Saxena via Vrushali C)

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/common/ColumnHelper.java

@@ -50,11 +50,28 @@ public class ColumnHelper<T> {
 
   private final ValueConverter converter;
 
+  private final boolean supplementTs;
+
   public ColumnHelper(ColumnFamily<T> columnFamily) {
     this(columnFamily, GenericConverter.getInstance());
   }
 
   public ColumnHelper(ColumnFamily<T> columnFamily, ValueConverter converter) {
+    this(columnFamily, converter, false);
+  }
+
+  /**
+   * @param columnFamily column family implementation.
+   * @param converter converter use to encode/decode values stored in the column
+   *     or column prefix.
+   * @param needSupplementTs flag to indicate if cell timestamp needs to be
+   *     modified for this column by calling
+   *     {@link TimestampGenerator#getSupplementedTimestamp(long, String)}. This
+   *     would be required for columns(such as metrics in flow run table) where
+   *     potential collisions can occur due to same timestamp.
+   */
+  public ColumnHelper(ColumnFamily<T> columnFamily, ValueConverter converter,
+      boolean needSupplementTs) {
     this.columnFamily = columnFamily;
     columnFamilyBytes = columnFamily.getBytes();
     if (converter == null) {
@@ -62,6 +79,7 @@ public class ColumnHelper<T> {
     } else {
       this.converter = converter;
     }
+    this.supplementTs = needSupplementTs;
   }
 
   /**
@@ -104,19 +122,25 @@ public class ColumnHelper<T> {
   }
 
   /*
-   * Figures out the cell timestamp used in the Put For storing into flow run
-   * table. We would like to left shift the timestamp and supplement it with the
-   * AppId id so that there are no collisions in the flow run table's cells
+   * Figures out the cell timestamp used in the Put For storing.
+   * Will supplement the timestamp if required. Typically done for flow run
+   * table.If we supplement the timestamp, we left shift the timestamp and
+   * supplement it with the AppId id so that there are no collisions in the flow
+   * run table's cells.
    */
   private long getPutTimestamp(Long timestamp, Attribute[] attributes) {
     if (timestamp == null) {
       timestamp = System.currentTimeMillis();
     }
+    if (!this.supplementTs) {
+      return timestamp;
+    } else {
       String appId = getAppIdFromAttributes(attributes);
       long supplementedTS = TimestampGenerator.getSupplementedTimestamp(
           timestamp, appId);
       return supplementedTS;
     }
+  }
 
   private String getAppIdFromAttributes(Attribute[] attributes) {
     if (attributes == null) {
@@ -232,9 +256,9 @@ public class ColumnHelper<T> {
               for (Entry<Long, byte[]> cell : cells.entrySet()) {
                 V value =
                     (V) converter.decodeValue(cell.getValue());
-                cellResults.put(
-                    TimestampGenerator.getTruncatedTimestamp(cell.getKey()),
-                    value);
+                Long ts = supplementTs ? TimestampGenerator.
+                    getTruncatedTimestamp(cell.getKey()) : cell.getKey();
+                cellResults.put(ts, value);
               }
             }
             results.put(converterColumnKey, cellResults);

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/common/HBaseTimelineStorageUtils.java

@@ -313,16 +313,8 @@ public final class HBaseTimelineStorageUtils {
   public static void setMetricsTimeRange(Query query, byte[] metricsCf,
       long tsBegin, long tsEnd) {
     if (tsBegin != 0 || tsEnd != Long.MAX_VALUE) {
-      long supplementedTsBegin = tsBegin == 0 ? 0 :
-          TimestampGenerator.getSupplementedTimestamp(tsBegin, null);
-      long supplementedTsEnd =
-          (tsEnd == Long.MAX_VALUE) ? Long.MAX_VALUE :
-          TimestampGenerator.getSupplementedTimestamp(tsEnd + 1, null);
-      // Handle overflow by resetting time begin to 0 and time end to
-      // Long#MAX_VALUE, if required.
       query.setColumnFamilyTimeRange(metricsCf,
-          ((supplementedTsBegin < 0) ? 0 : supplementedTsBegin),
-          ((supplementedTsEnd < 0) ? Long.MAX_VALUE : supplementedTsEnd));
+          tsBegin, ((tsEnd == Long.MAX_VALUE) ? Long.MAX_VALUE : (tsEnd + 1)));
     }
   }
 }

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

@@ -69,7 +69,7 @@ public enum FlowRunColumnPrefix implements ColumnPrefix<FlowRunTable> {
   private FlowRunColumnPrefix(ColumnFamily<FlowRunTable> columnFamily,
       String columnPrefix, AggregationOperation fra, ValueConverter converter,
       boolean compoundColQual) {
-    column = new ColumnHelper<FlowRunTable>(columnFamily, converter);
+    column = new ColumnHelper<FlowRunTable>(columnFamily, converter, true);
     this.columnFamily = columnFamily;
     this.columnPrefix = columnPrefix;
     if (columnPrefix == null) {

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/reader/ApplicationEntityReader.java

@@ -362,8 +362,8 @@ class ApplicationEntityReader extends GenericEntityReader {
 
   private void setMetricsTimeRange(Query query) {
     // Set time range for metric values.
-    HBaseTimelineStorageUtils.
-        setMetricsTimeRange(query, ApplicationColumnFamily.METRICS.getBytes(),
+    HBaseTimelineStorageUtils.setMetricsTimeRange(
+        query, ApplicationColumnFamily.METRICS.getBytes(),
         getDataToRetrieve().getMetricsTimeBegin(),
         getDataToRetrieve().getMetricsTimeEnd());
   }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/reader/GenericEntityReader.java

@@ -471,8 +471,8 @@ class GenericEntityReader extends TimelineEntityReader {
 
   private void setMetricsTimeRange(Query query) {
     // Set time range for metric values.
-    HBaseTimelineStorageUtils.
-        setMetricsTimeRange(query, EntityColumnFamily.METRICS.getBytes(),
+    HBaseTimelineStorageUtils.setMetricsTimeRange(
+        query, EntityColumnFamily.METRICS.getBytes(),
         getDataToRetrieve().getMetricsTimeBegin(),
         getDataToRetrieve().getMetricsTimeEnd());
   }