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Posted to commits@hudi.apache.org by co...@apache.org on 2022/03/31 20:03:42 UTC

[hudi] branch master updated: [HUDI-2488][HUDI-3175] Implement async metadata indexing (#4693)

This is an automated email from the ASF dual-hosted git repository.

codope pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/hudi.git


The following commit(s) were added to refs/heads/master by this push:
     new 28dafa7  [HUDI-2488][HUDI-3175] Implement async metadata indexing (#4693)
28dafa7 is described below

commit 28dafa774ee058a4d00fc15b1d7fffc0c020ec3e
Author: Sagar Sumit <sa...@gmail.com>
AuthorDate: Fri Apr 1 01:33:12 2022 +0530

    [HUDI-2488][HUDI-3175] Implement async metadata indexing (#4693)
    
    - Add a new action called INDEX, whose state transition is described in the RFC.
    - Changes in timeline to support the new action.
    - Add an index planner in ScheduleIndexActionExecutor.
    - Add index plan executor in RunIndexActionExecutor.
    - Add 3 APIs in HoodieTableMetadataWriter; a) scheduleIndex: will generate an index plan based on latest completed instant, initialize file groups and add a requested INDEX instant, b) index: executes the index plan and also takes care of writes that happened after indexing was requested, c) dropIndex: will drop index by removing the given metadata partition.
    - Add 2 new table configs to serve as the source of truth for inflight and completed indexes.
    - Support upgrade/downgrade taking care of the newly added configs.
    - Add tool to trigger indexing in HoodieIndexer.
    - Handle corner cases related to partial failures.
    - Abort gracefully after deleting partition and instant.
    - Handle other actions in timeline to consider before catching up
---
 .../org/apache/hudi/cli/commands/SparkMain.java    |  20 +-
 .../apache/hudi/client/BaseHoodieWriteClient.java  |  52 ++-
 .../org/apache/hudi/config/HoodieWriteConfig.java  |  20 +-
 .../apache/hudi/index/bloom/HoodieBloomIndex.java  |   2 +-
 .../org/apache/hudi/io/HoodieAppendHandle.java     |  23 +-
 .../metadata/HoodieBackedTableMetadataWriter.java  | 211 ++++++++---
 .../hudi/metadata/HoodieTableMetadataWriter.java   |  48 ++-
 .../java/org/apache/hudi/table/HoodieTable.java    |  25 +-
 .../table/action/index/RunIndexActionExecutor.java | 390 +++++++++++++++++++++
 .../action/index/ScheduleIndexActionExecutor.java  | 152 ++++++++
 .../table/upgrade/FourToThreeDowngradeHandler.java |   6 +
 .../table/upgrade/ThreeToFourUpgradeHandler.java   |  12 +-
 .../hudi/table/HoodieFlinkCopyOnWriteTable.java    |  13 +
 .../hudi/table/HoodieJavaCopyOnWriteTable.java     |  15 +
 .../hudi/table/HoodieSparkCopyOnWriteTable.java    |  15 +
 hudi-common/pom.xml                                |   3 +
 .../src/main/avro/HoodieArchivedMetaEntry.avsc     |   8 +
 .../src/main/avro/HoodieIndexCommitMetadata.avsc   |  54 +++
 .../src/main/avro/HoodieIndexPartitionInfo.avsc    |  48 +++
 hudi-common/src/main/avro/HoodieIndexPlan.avsc     |  43 +++
 .../hudi/common/bloom/SimpleBloomFilter.java       |   4 +-
 .../hudi/common/config/HoodieMetadataConfig.java   |  58 +++
 .../hudi/common/model/WriteOperationType.java      |   4 +
 .../hudi/common/table/HoodieTableConfig.java       |  23 ++
 .../table/timeline/HoodieActiveTimeline.java       |  69 +++-
 .../table/timeline/HoodieArchivedTimeline.java     |   5 +-
 .../table/timeline/HoodieDefaultTimeline.java      |  27 +-
 .../hudi/common/table/timeline/HoodieInstant.java  |   4 +
 .../hudi/common/table/timeline/HoodieTimeline.java |  45 ++-
 .../table/timeline/TimelineMetadataUtils.java      |  18 +
 .../table/view/HoodieTableFileSystemView.java      |  17 +-
 .../org/apache/hudi/common/util/StringUtils.java   |  34 +-
 .../apache/hudi/metadata/BaseTableMetadata.java    |  10 +-
 .../hudi/metadata/HoodieTableMetadataUtil.java     |  76 +++-
 .../metadata/MetadataRecordsGenerationParams.java  |  14 +-
 .../table/timeline/TestHoodieActiveTimeline.java   |  55 ++-
 .../apache/hudi/common/util/TestStringUtils.java   |  22 ++
 .../apache/hudi/utilities/HoodieClusteringJob.java |  52 +--
 .../org/apache/hudi/utilities/HoodieIndexer.java   | 307 ++++++++++++++++
 .../org/apache/hudi/utilities/UtilHelpers.java     |  42 ++-
 .../apache/hudi/utilities/TestHoodieIndexer.java   | 122 +++++++
 .../functional/HoodieDeltaStreamerTestBase.java    |   1 +
 .../functional/TestHoodieDeltaStreamer.java        |  77 +++-
 .../delta-streamer-config/indexer.properties       |  25 ++
 44 files changed, 2122 insertions(+), 149 deletions(-)

diff --git a/hudi-cli/src/main/java/org/apache/hudi/cli/commands/SparkMain.java b/hudi-cli/src/main/java/org/apache/hudi/cli/commands/SparkMain.java
index 4b1bcd5..323c7bb 100644
--- a/hudi-cli/src/main/java/org/apache/hudi/cli/commands/SparkMain.java
+++ b/hudi-cli/src/main/java/org/apache/hudi/cli/commands/SparkMain.java
@@ -18,7 +18,6 @@
 
 package org.apache.hudi.cli.commands;
 
-import org.apache.hadoop.fs.Path;
 import org.apache.hudi.DataSourceWriteOptions;
 import org.apache.hudi.cli.DeDupeType;
 import org.apache.hudi.cli.DedupeSparkJob;
@@ -54,9 +53,10 @@ import org.apache.hudi.utilities.HoodieClusteringJob;
 import org.apache.hudi.utilities.HoodieCompactionAdminTool;
 import org.apache.hudi.utilities.HoodieCompactionAdminTool.Operation;
 import org.apache.hudi.utilities.HoodieCompactor;
-import org.apache.hudi.utilities.UtilHelpers;
 import org.apache.hudi.utilities.deltastreamer.BootstrapExecutor;
 import org.apache.hudi.utilities.deltastreamer.HoodieDeltaStreamer;
+
+import org.apache.hadoop.fs.Path;
 import org.apache.log4j.Logger;
 import org.apache.spark.api.java.JavaSparkContext;
 import org.apache.spark.sql.SQLContext;
@@ -67,6 +67,12 @@ import java.util.Arrays;
 import java.util.List;
 import java.util.Locale;
 
+import static org.apache.hudi.utilities.UtilHelpers.EXECUTE;
+import static org.apache.hudi.utilities.UtilHelpers.SCHEDULE;
+import static org.apache.hudi.utilities.UtilHelpers.SCHEDULE_AND_EXECUTE;
+import static org.apache.hudi.utilities.UtilHelpers.buildProperties;
+import static org.apache.hudi.utilities.UtilHelpers.readConfig;
+
 /**
  * This class deals with initializing spark context based on command entered to hudi-cli.
  */
@@ -194,7 +200,7 @@ public class SparkMain {
             configs.addAll(Arrays.asList(args).subList(9, args.length));
           }
           returnCode = cluster(jsc, args[3], args[4], args[5], Integer.parseInt(args[6]), args[2],
-              Integer.parseInt(args[7]), HoodieClusteringJob.EXECUTE, propsFilePath, configs);
+              Integer.parseInt(args[7]), EXECUTE, propsFilePath, configs);
           break;
         case CLUSTERING_SCHEDULE_AND_EXECUTE:
           assert (args.length >= 8);
@@ -207,7 +213,7 @@ public class SparkMain {
             configs.addAll(Arrays.asList(args).subList(8, args.length));
           }
           returnCode = cluster(jsc, args[3], args[4], null, Integer.parseInt(args[5]), args[2],
-              Integer.parseInt(args[6]), HoodieClusteringJob.SCHEDULE_AND_EXECUTE, propsFilePath, configs);
+              Integer.parseInt(args[6]), SCHEDULE_AND_EXECUTE, propsFilePath, configs);
           break;
         case CLUSTERING_SCHEDULE:
           assert (args.length >= 7);
@@ -220,7 +226,7 @@ public class SparkMain {
             configs.addAll(Arrays.asList(args).subList(7, args.length));
           }
           returnCode = cluster(jsc, args[3], args[4], args[5], 1, args[2],
-              0, HoodieClusteringJob.SCHEDULE, propsFilePath, configs);
+              0, SCHEDULE, propsFilePath, configs);
           break;
         case CLEAN:
           assert (args.length >= 5);
@@ -413,8 +419,8 @@ public class SparkMain {
       String bootstrapIndexClass, String selectorClass, String keyGenerator, String fullBootstrapInputProvider,
       String payloadClassName, String enableHiveSync, String propsFilePath, List<String> configs) throws IOException {
 
-    TypedProperties properties = propsFilePath == null ? UtilHelpers.buildProperties(configs)
-        : UtilHelpers.readConfig(jsc.hadoopConfiguration(), new Path(propsFilePath), configs).getProps(true);
+    TypedProperties properties = propsFilePath == null ? buildProperties(configs)
+        : readConfig(jsc.hadoopConfiguration(), new Path(propsFilePath), configs).getProps(true);
 
     properties.setProperty(HoodieBootstrapConfig.BASE_PATH.key(), sourcePath);
 
diff --git a/hudi-client/hudi-client-common/src/main/java/org/apache/hudi/client/BaseHoodieWriteClient.java b/hudi-client/hudi-client-common/src/main/java/org/apache/hudi/client/BaseHoodieWriteClient.java
index aba6fad..38455bc 100644
--- a/hudi-client/hudi-client-common/src/main/java/org/apache/hudi/client/BaseHoodieWriteClient.java
+++ b/hudi-client/hudi-client-common/src/main/java/org/apache/hudi/client/BaseHoodieWriteClient.java
@@ -25,6 +25,8 @@ import org.apache.hudi.avro.model.HoodieCleanMetadata;
 import org.apache.hudi.avro.model.HoodieCleanerPlan;
 import org.apache.hudi.avro.model.HoodieClusteringPlan;
 import org.apache.hudi.avro.model.HoodieCompactionPlan;
+import org.apache.hudi.avro.model.HoodieIndexCommitMetadata;
+import org.apache.hudi.avro.model.HoodieIndexPlan;
 import org.apache.hudi.avro.model.HoodieRestoreMetadata;
 import org.apache.hudi.avro.model.HoodieRestorePlan;
 import org.apache.hudi.avro.model.HoodieRollbackMetadata;
@@ -63,12 +65,14 @@ import org.apache.hudi.config.HoodieWriteConfig;
 import org.apache.hudi.exception.HoodieCommitException;
 import org.apache.hudi.exception.HoodieException;
 import org.apache.hudi.exception.HoodieIOException;
+import org.apache.hudi.exception.HoodieIndexException;
 import org.apache.hudi.exception.HoodieRestoreException;
 import org.apache.hudi.exception.HoodieRollbackException;
 import org.apache.hudi.exception.HoodieSavepointException;
 import org.apache.hudi.index.HoodieIndex;
 import org.apache.hudi.metadata.HoodieTableMetadata;
 import org.apache.hudi.metadata.HoodieTableMetadataWriter;
+import org.apache.hudi.metadata.MetadataPartitionType;
 import org.apache.hudi.metrics.HoodieMetrics;
 import org.apache.hudi.table.BulkInsertPartitioner;
 import org.apache.hudi.table.HoodieTable;
@@ -405,7 +409,6 @@ public abstract class BaseHoodieWriteClient<T extends HoodieRecordPayload, I, K,
   public abstract O bulkInsert(I records, final String instantTime,
                                Option<BulkInsertPartitioner> userDefinedBulkInsertPartitioner);
 
-
   /**
    * Loads the given HoodieRecords, as inserts into the table. This is suitable for doing big bulk loads into a Hoodie
    * table for the very first time (e.g: converting an existing table to Hoodie). The input records should contain no
@@ -956,6 +959,53 @@ public abstract class BaseHoodieWriteClient<T extends HoodieRecordPayload, I, K,
     return scheduleTableService(instantTime, extraMetadata, TableServiceType.COMPACT).isPresent();
   }
 
+
+  /**
+   * Schedules INDEX action.
+   *
+   * @param partitionTypes - list of {@link MetadataPartitionType} which needs to be indexed
+   * @return instant time for the requested INDEX action
+   */
+  public Option<String> scheduleIndexing(List<MetadataPartitionType> partitionTypes) {
+    String instantTime = HoodieActiveTimeline.createNewInstantTime();
+    Option<HoodieIndexPlan> indexPlan = createTable(config, hadoopConf, config.isMetadataTableEnabled())
+        .scheduleIndexing(context, instantTime, partitionTypes);
+    return indexPlan.isPresent() ? Option.of(instantTime) : Option.empty();
+  }
+
+  /**
+   * Runs INDEX action to build out the metadata partitions as planned for the given instant time.
+   *
+   * @param indexInstantTime - instant time for the requested INDEX action
+   * @return {@link Option<HoodieIndexCommitMetadata>} after successful indexing.
+   */
+  public Option<HoodieIndexCommitMetadata> index(String indexInstantTime) {
+    return createTable(config, hadoopConf, config.isMetadataTableEnabled()).index(context, indexInstantTime);
+  }
+
+  /**
+   * Drops the index and removes the metadata partitions.
+   *
+   * @param partitionTypes - list of {@link MetadataPartitionType} which needs to be indexed
+   */
+  public void dropIndex(List<MetadataPartitionType> partitionTypes) {
+    HoodieTable table = createTable(config, hadoopConf);
+    String dropInstant = HoodieActiveTimeline.createNewInstantTime();
+    this.txnManager.beginTransaction();
+    try {
+      context.setJobStatus(this.getClass().getSimpleName(), "Dropping partitions from metadata table");
+      table.getMetadataWriter(dropInstant).ifPresent(w -> {
+        try {
+          ((HoodieTableMetadataWriter) w).dropMetadataPartitions(partitionTypes);
+        } catch (IOException e) {
+          throw new HoodieIndexException("Failed to drop metadata index. ", e);
+        }
+      });
+    } finally {
+      this.txnManager.endTransaction();
+    }
+  }
+
   /**
    * Performs Compaction for the workload stored in instant-time.
    *
diff --git a/hudi-client/hudi-client-common/src/main/java/org/apache/hudi/config/HoodieWriteConfig.java b/hudi-client/hudi-client-common/src/main/java/org/apache/hudi/config/HoodieWriteConfig.java
index 776c906..ee5f85f 100644
--- a/hudi-client/hudi-client-common/src/main/java/org/apache/hudi/config/HoodieWriteConfig.java
+++ b/hudi-client/hudi-client-common/src/main/java/org/apache/hudi/config/HoodieWriteConfig.java
@@ -1507,8 +1507,20 @@ public class HoodieWriteConfig extends HoodieConfig {
     return isMetadataTableEnabled() && getMetadataConfig().isBloomFilterIndexEnabled();
   }
 
-  public boolean isMetadataIndexColumnStatsForAllColumnsEnabled() {
-    return isMetadataTableEnabled() && getMetadataConfig().isMetadataColumnStatsIndexForAllColumnsEnabled();
+  public boolean isMetadataColumnStatsIndexEnabled() {
+    return isMetadataTableEnabled() && getMetadataConfig().isColumnStatsIndexEnabled();
+  }
+
+  public String getColumnsEnabledForColumnStatsIndex() {
+    return getMetadataConfig().getColumnsEnabledForColumnStatsIndex();
+  }
+
+  public String getColumnsEnabledForBloomFilterIndex() {
+    return getMetadataConfig().getColumnsEnabledForBloomFilterIndex();
+  }
+
+  public int getIndexingCheckTimeoutSeconds() {
+    return getMetadataConfig().getIndexingCheckTimeoutSeconds();
   }
 
   public int getColumnStatsIndexParallelism() {
@@ -1892,6 +1904,10 @@ public class HoodieWriteConfig extends HoodieConfig {
     return getBoolean(HoodieMetadataConfig.ASYNC_CLEAN_ENABLE);
   }
 
+  public boolean isMetadataAsyncIndex() {
+    return getBooleanOrDefault(HoodieMetadataConfig.ASYNC_INDEX_ENABLE);
+  }
+
   public int getMetadataMaxCommitsToKeep() {
     return getInt(HoodieMetadataConfig.MAX_COMMITS_TO_KEEP);
   }
diff --git a/hudi-client/hudi-client-common/src/main/java/org/apache/hudi/index/bloom/HoodieBloomIndex.java b/hudi-client/hudi-client-common/src/main/java/org/apache/hudi/index/bloom/HoodieBloomIndex.java
index d3e73c0..a923a4c 100644
--- a/hudi-client/hudi-client-common/src/main/java/org/apache/hudi/index/bloom/HoodieBloomIndex.java
+++ b/hudi-client/hudi-client-common/src/main/java/org/apache/hudi/index/bloom/HoodieBloomIndex.java
@@ -120,7 +120,7 @@ public class HoodieBloomIndex extends HoodieIndex<Object, Object> {
     // Step 2: Load all involved files as <Partition, filename> pairs
     List<Pair<String, BloomIndexFileInfo>> fileInfoList;
     if (config.getBloomIndexPruneByRanges()) {
-      fileInfoList = (config.getMetadataConfig().isColumnStatsIndexEnabled()
+      fileInfoList = (config.isMetadataColumnStatsIndexEnabled()
           ? loadColumnRangesFromMetaIndex(affectedPartitionPathList, context, hoodieTable)
           : loadColumnRangesFromFiles(affectedPartitionPathList, context, hoodieTable));
     } else {
diff --git a/hudi-client/hudi-client-common/src/main/java/org/apache/hudi/io/HoodieAppendHandle.java b/hudi-client/hudi-client-common/src/main/java/org/apache/hudi/io/HoodieAppendHandle.java
index f808101..f4aa734 100644
--- a/hudi-client/hudi-client-common/src/main/java/org/apache/hudi/io/HoodieAppendHandle.java
+++ b/hudi-client/hudi-client-common/src/main/java/org/apache/hudi/io/HoodieAppendHandle.java
@@ -50,12 +50,14 @@ import org.apache.hudi.common.util.DefaultSizeEstimator;
 import org.apache.hudi.common.util.Option;
 import org.apache.hudi.common.util.ReflectionUtils;
 import org.apache.hudi.common.util.SizeEstimator;
+import org.apache.hudi.common.util.StringUtils;
 import org.apache.hudi.config.HoodieWriteConfig;
 import org.apache.hudi.exception.HoodieAppendException;
 import org.apache.hudi.exception.HoodieException;
 import org.apache.hudi.exception.HoodieUpsertException;
 import org.apache.hudi.table.HoodieTable;
 
+import org.apache.avro.Schema;
 import org.apache.avro.generic.GenericRecord;
 import org.apache.avro.generic.IndexedRecord;
 import org.apache.hadoop.fs.Path;
@@ -69,8 +71,10 @@ import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
 import java.util.Properties;
+import java.util.Set;
 import java.util.concurrent.atomic.AtomicLong;
 import java.util.stream.Collectors;
+import java.util.stream.Stream;
 
 import static org.apache.hudi.metadata.HoodieTableMetadataUtil.accumulateColumnRanges;
 import static org.apache.hudi.metadata.HoodieTableMetadataUtil.aggregateColumnStats;
@@ -343,16 +347,27 @@ public class HoodieAppendHandle<T extends HoodieRecordPayload, I, K, O> extends
       updateWriteStatus(stat, result);
     }
 
-    if (config.isMetadataIndexColumnStatsForAllColumnsEnabled()) {
+    if (config.isMetadataColumnStatsIndexEnabled()) {
+      final List<Schema.Field> fieldsToIndex;
+      if (!StringUtils.isNullOrEmpty(config.getColumnsEnabledForColumnStatsIndex())) {
+        Set<String> columnsToIndex = Stream.of(config.getColumnsEnabledForColumnStatsIndex().split(","))
+            .map(String::trim).filter(s -> !s.isEmpty()).collect(Collectors.toSet());
+        fieldsToIndex = writeSchemaWithMetaFields.getFields().stream()
+            .filter(field -> columnsToIndex.contains(field.name())).collect(Collectors.toList());
+      } else {
+        // if column stats index is enabled but columns not configured then we assume that all columns should be indexed
+        fieldsToIndex = writeSchemaWithMetaFields.getFields();
+      }
+
       Map<String, HoodieColumnRangeMetadata<Comparable>> columnRangeMap = stat.getRecordsStats().isPresent()
           ? stat.getRecordsStats().get().getStats() : new HashMap<>();
       final String filePath = stat.getPath();
       // initialize map of column name to map of stats name to stats value
       Map<String, Map<String, Object>> columnToStats = new HashMap<>();
-      writeSchemaWithMetaFields.getFields().forEach(field -> columnToStats.putIfAbsent(field.name(), new HashMap<>()));
+      fieldsToIndex.forEach(field -> columnToStats.putIfAbsent(field.name(), new HashMap<>()));
       // collect stats for columns at once per record and keep iterating through every record to eventually find col stats for all fields.
-      recordList.forEach(record -> aggregateColumnStats(record, writeSchemaWithMetaFields, columnToStats, config.isConsistentLogicalTimestampEnabled()));
-      writeSchemaWithMetaFields.getFields().forEach(field -> accumulateColumnRanges(field, filePath, columnRangeMap, columnToStats));
+      recordList.forEach(record -> aggregateColumnStats(record, fieldsToIndex, columnToStats, config.isConsistentLogicalTimestampEnabled()));
+      fieldsToIndex.forEach(field -> accumulateColumnRanges(field, filePath, columnRangeMap, columnToStats));
       stat.setRecordsStats(new HoodieDeltaWriteStat.RecordsStats<>(columnRangeMap));
     }
 
diff --git a/hudi-client/hudi-client-common/src/main/java/org/apache/hudi/metadata/HoodieBackedTableMetadataWriter.java b/hudi-client/hudi-client-common/src/main/java/org/apache/hudi/metadata/HoodieBackedTableMetadataWriter.java
index ce167f7..abed2f7 100644
--- a/hudi-client/hudi-client-common/src/main/java/org/apache/hudi/metadata/HoodieBackedTableMetadataWriter.java
+++ b/hudi-client/hudi-client-common/src/main/java/org/apache/hudi/metadata/HoodieBackedTableMetadataWriter.java
@@ -19,6 +19,7 @@
 package org.apache.hudi.metadata;
 
 import org.apache.hudi.avro.model.HoodieCleanMetadata;
+import org.apache.hudi.avro.model.HoodieIndexPartitionInfo;
 import org.apache.hudi.avro.model.HoodieInstantInfo;
 import org.apache.hudi.avro.model.HoodieMetadataRecord;
 import org.apache.hudi.avro.model.HoodieRestoreMetadata;
@@ -54,6 +55,7 @@ import org.apache.hudi.common.table.timeline.versioning.TimelineLayoutVersion;
 import org.apache.hudi.common.table.view.HoodieTableFileSystemView;
 import org.apache.hudi.common.util.HoodieTimer;
 import org.apache.hudi.common.util.Option;
+import org.apache.hudi.common.util.StringUtils;
 import org.apache.hudi.common.util.ValidationUtils;
 import org.apache.hudi.common.util.collection.Pair;
 import org.apache.hudi.config.HoodieCompactionConfig;
@@ -62,6 +64,7 @@ import org.apache.hudi.config.metrics.HoodieMetricsConfig;
 import org.apache.hudi.config.metrics.HoodieMetricsGraphiteConfig;
 import org.apache.hudi.config.metrics.HoodieMetricsJmxConfig;
 import org.apache.hudi.exception.HoodieException;
+import org.apache.hudi.exception.HoodieIndexException;
 import org.apache.hudi.exception.HoodieMetadataException;
 
 import org.apache.avro.specific.SpecificRecordBase;
@@ -80,14 +83,19 @@ import java.util.Collections;
 import java.util.HashMap;
 import java.util.LinkedList;
 import java.util.List;
+import java.util.Locale;
 import java.util.Map;
 import java.util.Properties;
+import java.util.Set;
 import java.util.concurrent.atomic.AtomicLong;
 import java.util.stream.Collectors;
 
 import static org.apache.hudi.common.table.HoodieTableConfig.ARCHIVELOG_FOLDER;
+import static org.apache.hudi.common.util.StringUtils.EMPTY_STRING;
 import static org.apache.hudi.metadata.HoodieTableMetadata.METADATA_TABLE_NAME_SUFFIX;
 import static org.apache.hudi.metadata.HoodieTableMetadata.SOLO_COMMIT_TIMESTAMP;
+import static org.apache.hudi.metadata.HoodieTableMetadataUtil.getCompletedMetadataPartitions;
+import static org.apache.hudi.metadata.HoodieTableMetadataUtil.getInflightMetadataPartitions;
 
 /**
  * Writer implementation backed by an internal hudi table. Partition and file listing are saved within an internal MOR table
@@ -113,7 +121,6 @@ public abstract class HoodieBackedTableMetadataWriter implements HoodieTableMeta
   protected boolean enabled;
   protected SerializableConfiguration hadoopConf;
   protected final transient HoodieEngineContext engineContext;
-  // TODO: HUDI-3258 Support secondary key via multiple partitions within a single type
   protected final List<MetadataPartitionType> enabledPartitionTypes;
 
   /**
@@ -363,6 +370,18 @@ public abstract class HoodieBackedTableMetadataWriter implements HoodieTableMeta
                                                                    Option<String> inflightInstantTimestamp) throws IOException {
     HoodieTimer timer = new HoodieTimer().startTimer();
 
+    boolean exists = metadataTableExists(dataMetaClient, actionMetadata);
+
+    if (!exists) {
+      // Initialize for the first time by listing partitions and files directly from the file system
+      if (initializeFromFilesystem(dataMetaClient, inflightInstantTimestamp)) {
+        metrics.ifPresent(m -> m.updateMetrics(HoodieMetadataMetrics.INITIALIZE_STR, timer.endTimer()));
+      }
+    }
+  }
+
+  private <T extends SpecificRecordBase> boolean metadataTableExists(HoodieTableMetaClient dataMetaClient,
+                                                                     Option<T> actionMetadata) throws IOException {
     boolean exists = dataMetaClient.getFs().exists(new Path(metadataWriteConfig.getBasePath(),
         HoodieTableMetaClient.METAFOLDER_NAME));
     boolean reInitialize = false;
@@ -391,12 +410,7 @@ public abstract class HoodieBackedTableMetadataWriter implements HoodieTableMeta
       exists = false;
     }
 
-    if (!exists) {
-      // Initialize for the first time by listing partitions and files directly from the file system
-      if (initializeFromFilesystem(dataMetaClient, inflightInstantTimestamp)) {
-        metrics.ifPresent(m -> m.updateMetrics(HoodieMetadataMetrics.INITIALIZE_STR, timer.endTimer()));
-      }
-    }
+    return  exists;
   }
 
   /**
@@ -451,7 +465,7 @@ public abstract class HoodieBackedTableMetadataWriter implements HoodieTableMeta
 
     final String INSTANT_ACTION = (actionMetadata.get() instanceof HoodieRollbackMetadata
         ? HoodieTimeline.ROLLBACK_ACTION
-        : (actionMetadata.get() instanceof HoodieRestoreMetadata ? HoodieTimeline.RESTORE_ACTION : ""));
+        : (actionMetadata.get() instanceof HoodieRestoreMetadata ? HoodieTimeline.RESTORE_ACTION : EMPTY_STRING));
 
     List<String> affectedInstantTimestamps;
     switch (INSTANT_ACTION) {
@@ -511,16 +525,33 @@ public abstract class HoodieBackedTableMetadataWriter implements HoodieTableMeta
 
     initializeMetaClient(dataWriteConfig.getMetadataConfig().populateMetaFields());
     initTableMetadata();
-    initializeEnabledFileGroups(dataMetaClient, createInstantTime);
+    // if async metadata indexing is enabled,
+    // then only initialize files partition as other partitions will be built using HoodieIndexer
+    List<MetadataPartitionType> enabledPartitionTypes =  new ArrayList<>();
+    if (dataWriteConfig.isMetadataAsyncIndex()) {
+      enabledPartitionTypes.add(MetadataPartitionType.FILES);
+    } else {
+      // all enabled ones should be initialized
+      enabledPartitionTypes = this.enabledPartitionTypes;
+    }
+    initializeEnabledFileGroups(dataMetaClient, createInstantTime, enabledPartitionTypes);
 
     // During cold startup, the list of files to be committed can be huge. So creating a HoodieCommitMetadata out
     // of these large number of files and calling the existing update(HoodieCommitMetadata) function does not scale
     // well. Hence, we have a special commit just for the initialization scenario.
-    initialCommit(createInstantTime);
+    initialCommit(createInstantTime, enabledPartitionTypes);
+    updateInitializedPartitionsInTableConfig(enabledPartitionTypes);
     return true;
   }
 
-  private HoodieTableMetaClient initializeMetaClient(boolean populatMetaFields) throws IOException {
+  private void updateInitializedPartitionsInTableConfig(List<MetadataPartitionType> partitionTypes) {
+    Set<String> completedPartitions = getCompletedMetadataPartitions(dataMetaClient.getTableConfig());
+    completedPartitions.addAll(partitionTypes.stream().map(MetadataPartitionType::getPartitionPath).collect(Collectors.toSet()));
+    dataMetaClient.getTableConfig().setValue(HoodieTableConfig.TABLE_METADATA_PARTITIONS.key(), String.join(",", completedPartitions));
+    HoodieTableConfig.update(dataMetaClient.getFs(), new Path(dataMetaClient.getMetaPath()), dataMetaClient.getTableConfig().getProps());
+  }
+
+  private HoodieTableMetaClient initializeMetaClient(boolean populateMetaFields) throws IOException {
     return HoodieTableMetaClient.withPropertyBuilder()
         .setTableType(HoodieTableType.MERGE_ON_READ)
         .setTableName(tableName)
@@ -528,7 +559,7 @@ public abstract class HoodieBackedTableMetadataWriter implements HoodieTableMeta
         .setPayloadClassName(HoodieMetadataPayload.class.getName())
         .setBaseFileFormat(HoodieFileFormat.HFILE.toString())
         .setRecordKeyFields(RECORD_KEY_FIELD_NAME)
-        .setPopulateMetaFields(populatMetaFields)
+        .setPopulateMetaFields(populateMetaFields)
         .setKeyGeneratorClassProp(HoodieTableMetadataKeyGenerator.class.getCanonicalName())
         .initTable(hadoopConf.get(), metadataWriteConfig.getBasePath());
   }
@@ -553,7 +584,7 @@ public abstract class HoodieBackedTableMetadataWriter implements HoodieTableMeta
       // In each round we will list a section of directories
       int numDirsToList = Math.min(fileListingParallelism, pathsToList.size());
       // List all directories in parallel
-      List<DirectoryInfo> processedDirectories = engineContext.map(pathsToList.subList(0,  numDirsToList), path -> {
+      List<DirectoryInfo> processedDirectories = engineContext.map(pathsToList.subList(0, numDirsToList), path -> {
         FileSystem fs = path.getFileSystem(conf.get());
         String relativeDirPath = FSUtils.getRelativePartitionPath(new Path(datasetBasePath), path);
         return new DirectoryInfo(relativeDirPath, fs.listStatus(path));
@@ -595,13 +626,19 @@ public abstract class HoodieBackedTableMetadataWriter implements HoodieTableMeta
    * @param createInstantTime - Metadata table create instant time
    * @throws IOException
    */
-  private void initializeEnabledFileGroups(HoodieTableMetaClient dataMetaClient, String createInstantTime) throws IOException {
-    for (MetadataPartitionType enabledPartitionType : this.enabledPartitionTypes) {
+  private void initializeEnabledFileGroups(HoodieTableMetaClient dataMetaClient, String createInstantTime, List<MetadataPartitionType> partitionTypes) throws IOException {
+    for (MetadataPartitionType enabledPartitionType : partitionTypes) {
       initializeFileGroups(dataMetaClient, enabledPartitionType, createInstantTime,
           enabledPartitionType.getFileGroupCount());
     }
   }
 
+  public void initializeMetadataPartitions(HoodieTableMetaClient dataMetaClient, List<MetadataPartitionType> metadataPartitions, String instantTime) throws IOException {
+    for (MetadataPartitionType partitionType : metadataPartitions) {
+      initializeFileGroups(dataMetaClient, partitionType, instantTime, partitionType.getFileGroupCount());
+    }
+  }
+
   /**
    * Initialize file groups for a partition. For file listing, we just have one file group.
    *
@@ -614,7 +651,6 @@ public abstract class HoodieBackedTableMetadataWriter implements HoodieTableMeta
    */
   private void initializeFileGroups(HoodieTableMetaClient dataMetaClient, MetadataPartitionType metadataPartition, String instantTime,
                                     int fileGroupCount) throws IOException {
-
     final HashMap<HeaderMetadataType, String> blockHeader = new HashMap<>();
     blockHeader.put(HeaderMetadataType.INSTANT_TIME, instantTime);
     // Archival of data table has a dependency on compaction(base files) in metadata table.
@@ -645,12 +681,34 @@ public abstract class HoodieBackedTableMetadataWriter implements HoodieTableMeta
     }
   }
 
+  public void dropMetadataPartitions(List<MetadataPartitionType> metadataPartitions) throws IOException {
+    Set<String> completedIndexes = getCompletedMetadataPartitions(dataMetaClient.getTableConfig());
+    Set<String> inflightIndexes = getInflightMetadataPartitions(dataMetaClient.getTableConfig());
+
+    for (MetadataPartitionType partitionType : metadataPartitions) {
+      String partitionPath = partitionType.getPartitionPath();
+      // first update table config
+      if (inflightIndexes.contains(partitionPath)) {
+        inflightIndexes.remove(partitionPath);
+        dataMetaClient.getTableConfig().setValue(HoodieTableConfig.TABLE_METADATA_PARTITIONS_INFLIGHT.key(), String.join(",", inflightIndexes));
+      } else if (completedIndexes.contains(partitionPath)) {
+        completedIndexes.remove(partitionPath);
+        dataMetaClient.getTableConfig().setValue(HoodieTableConfig.TABLE_METADATA_PARTITIONS.key(), String.join(",", completedIndexes));
+      }
+      HoodieTableConfig.update(dataMetaClient.getFs(), new Path(dataMetaClient.getMetaPath()), dataMetaClient.getTableConfig().getProps());
+      LOG.warn("Deleting Metadata Table partitions: " + partitionPath);
+      dataMetaClient.getFs().delete(new Path(metadataWriteConfig.getBasePath(), partitionPath), true);
+    }
+  }
+
   private MetadataRecordsGenerationParams getRecordsGenerationParams() {
     return new MetadataRecordsGenerationParams(
         dataMetaClient, enabledPartitionTypes, dataWriteConfig.getBloomFilterType(),
         dataWriteConfig.getBloomIndexParallelism(),
-        dataWriteConfig.isMetadataIndexColumnStatsForAllColumnsEnabled(),
-        dataWriteConfig.getColumnStatsIndexParallelism());
+        dataWriteConfig.isMetadataColumnStatsIndexEnabled(),
+        dataWriteConfig.getColumnStatsIndexParallelism(),
+        StringUtils.toList(dataWriteConfig.getColumnsEnabledForColumnStatsIndex()),
+        StringUtils.toList(dataWriteConfig.getColumnsEnabledForBloomFilterIndex()));
   }
 
   /**
@@ -663,20 +721,82 @@ public abstract class HoodieBackedTableMetadataWriter implements HoodieTableMeta
 
   /**
    * Processes commit metadata from data table and commits to metadata table.
+   *
    * @param instantTime instant time of interest.
    * @param convertMetadataFunction converter function to convert the respective metadata to List of HoodieRecords to be written to metadata table.
    * @param <T> type of commit metadata.
    * @param canTriggerTableService true if table services can be triggered. false otherwise.
    */
   private <T> void processAndCommit(String instantTime, ConvertMetadataFunction convertMetadataFunction, boolean canTriggerTableService) {
+    if (!dataWriteConfig.isMetadataTableEnabled()) {
+      return;
+    }
+    Set<String> partitionsToUpdate = getMetadataPartitionsToUpdate();
+    Set<String> inflightIndexes = getInflightMetadataPartitions(dataMetaClient.getTableConfig());
+    // if indexing is inflight then do not trigger table service
+    boolean doNotTriggerTableService = partitionsToUpdate.stream().anyMatch(inflightIndexes::contains);
+
     if (enabled && metadata != null) {
-      Map<MetadataPartitionType, HoodieData<HoodieRecord>> partitionRecordsMap = convertMetadataFunction.convertMetadata();
-      commit(instantTime, partitionRecordsMap, canTriggerTableService);
+      // convert metadata and filter only the entries whose partition path are in partitionsToUpdate
+      Map<MetadataPartitionType, HoodieData<HoodieRecord>> partitionRecordsMap = convertMetadataFunction.convertMetadata().entrySet().stream()
+          .filter(entry -> partitionsToUpdate.contains(entry.getKey().getPartitionPath())).collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue));
+      commit(instantTime, partitionRecordsMap, !doNotTriggerTableService && canTriggerTableService);
+    }
+  }
+
+  private Set<String> getMetadataPartitionsToUpdate() {
+    // fetch partitions to update from table config
+    Set<String> partitionsToUpdate = getCompletedMetadataPartitions(dataMetaClient.getTableConfig());
+    // add inflight indexes as well because the file groups have already been initialized, so writers can log updates
+    partitionsToUpdate.addAll(getInflightMetadataPartitions(dataMetaClient.getTableConfig()));
+    if (!partitionsToUpdate.isEmpty()) {
+      return partitionsToUpdate;
     }
+    // fallback to all enabled partitions if table config returned no partitions
+    return getEnabledPartitionTypes().stream().map(MetadataPartitionType::getPartitionPath).collect(Collectors.toSet());
+  }
+
+  @Override
+  public void buildMetadataPartitions(HoodieEngineContext engineContext, List<HoodieIndexPartitionInfo> indexPartitionInfos) {
+    if (indexPartitionInfos.isEmpty()) {
+      LOG.warn("No partition to index in the plan");
+      return;
+    }
+    String indexUptoInstantTime = indexPartitionInfos.get(0).getIndexUptoInstant();
+    List<MetadataPartitionType> partitionTypes = new ArrayList<>();
+    indexPartitionInfos.forEach(indexPartitionInfo -> {
+      String relativePartitionPath = indexPartitionInfo.getMetadataPartitionPath();
+      LOG.info(String.format("Creating a new metadata index for partition '%s' under path %s upto instant %s",
+          relativePartitionPath, metadataWriteConfig.getBasePath(), indexUptoInstantTime));
+      try {
+        // file group should have already been initialized while scheduling index for this partition
+        if (!dataMetaClient.getFs().exists(new Path(metadataWriteConfig.getBasePath(), relativePartitionPath))) {
+          throw new HoodieIndexException(String.format("File group not initialized for metadata partition: %s, indexUptoInstant: %s. Looks like index scheduling failed!",
+              relativePartitionPath, indexUptoInstantTime));
+        }
+      } catch (IOException e) {
+        throw new HoodieIndexException(String.format("Unable to check whether file group is initialized for metadata partition: %s, indexUptoInstant: %s",
+            relativePartitionPath, indexUptoInstantTime));
+      }
+
+      // return early and populate enabledPartitionTypes correctly (check in initialCommit)
+      MetadataPartitionType partitionType = MetadataPartitionType.valueOf(relativePartitionPath.toUpperCase(Locale.ROOT));
+      if (!enabledPartitionTypes.contains(partitionType)) {
+        throw new HoodieIndexException(String.format("Indexing for metadata partition: %s is not enabled", partitionType));
+      }
+      partitionTypes.add(partitionType);
+    });
+    // before initial commit update inflight indexes in table config
+    Set<String> inflightIndexes = getInflightMetadataPartitions(dataMetaClient.getTableConfig());
+    inflightIndexes.addAll(indexPartitionInfos.stream().map(HoodieIndexPartitionInfo::getMetadataPartitionPath).collect(Collectors.toSet()));
+    dataMetaClient.getTableConfig().setValue(HoodieTableConfig.TABLE_METADATA_PARTITIONS_INFLIGHT.key(), String.join(",", inflightIndexes));
+    HoodieTableConfig.update(dataMetaClient.getFs(), new Path(dataMetaClient.getMetaPath()), dataMetaClient.getTableConfig().getProps());
+    initialCommit(indexUptoInstantTime, partitionTypes);
   }
 
   /**
    * Update from {@code HoodieCommitMetadata}.
+   *
    * @param commitMetadata {@code HoodieCommitMetadata}
    * @param instantTime Timestamp at which the commit was performed
    * @param isTableServiceAction {@code true} if commit metadata is pertaining to a table service. {@code false} otherwise.
@@ -776,12 +896,18 @@ public abstract class HoodieBackedTableMetadataWriter implements HoodieTableMeta
 
       List<FileSlice> fileSlices =
           HoodieTableMetadataUtil.getPartitionLatestFileSlices(metadataMetaClient, Option.ofNullable(fsView), partitionName);
+      if (fileSlices.isEmpty()) {
+        // scheduling of INDEX only initializes the file group and not add commit
+        // so if there are no committed file slices, look for inflight slices
+        fileSlices = HoodieTableMetadataUtil.getPartitionLatestFileSlicesIncludingInflight(metadataMetaClient, Option.ofNullable(fsView), partitionName);
+      }
       ValidationUtils.checkArgument(fileSlices.size() == fileGroupCount,
           String.format("Invalid number of file groups for partition:%s, found=%d, required=%d",
               partitionName, fileSlices.size(), fileGroupCount));
 
+      List<FileSlice> finalFileSlices = fileSlices;
       HoodieData<HoodieRecord> rddSinglePartitionRecords = records.map(r -> {
-        FileSlice slice = fileSlices.get(HoodieTableMetadataUtil.mapRecordKeyToFileGroupIndex(r.getRecordKey(),
+        FileSlice slice = finalFileSlices.get(HoodieTableMetadataUtil.mapRecordKeyToFileGroupIndex(r.getRecordKey(),
             fileGroupCount));
         r.setCurrentLocation(new HoodieRecordLocation(slice.getBaseInstantTime(), slice.getFileId()));
         return r;
@@ -850,7 +976,7 @@ public abstract class HoodieBackedTableMetadataWriter implements HoodieTableMeta
    * This is invoked to initialize metadata table for a dataset. Bootstrap Commit has special handling mechanism due to its scale compared to
    * other regular commits.
    */
-  private void initialCommit(String createInstantTime) {
+  private void initialCommit(String createInstantTime, List<MetadataPartitionType> partitionTypes) {
     // List all partitions in the basePath of the containing dataset
     LOG.info("Initializing metadata table by using file listings in " + dataWriteConfig.getBasePath());
     engineContext.setJobStatus(this.getClass().getSimpleName(), "Initializing metadata table by listing files and partitions");
@@ -877,6 +1003,29 @@ public abstract class HoodieBackedTableMetadataWriter implements HoodieTableMeta
       return;
     }
 
+    if (partitionTypes.contains(MetadataPartitionType.FILES)) {
+      HoodieData<HoodieRecord> filesPartitionRecords = getFilesPartitionRecords(createInstantTime, partitionInfoList, allPartitionRecord);
+      ValidationUtils.checkState(filesPartitionRecords.count() == (partitions.size() + 1));
+      partitionToRecordsMap.put(MetadataPartitionType.FILES, filesPartitionRecords);
+    }
+
+    if (partitionTypes.contains(MetadataPartitionType.BLOOM_FILTERS)) {
+      final HoodieData<HoodieRecord> recordsRDD = HoodieTableMetadataUtil.convertFilesToBloomFilterRecords(
+          engineContext, Collections.emptyMap(), partitionToFilesMap, getRecordsGenerationParams(), createInstantTime);
+      partitionToRecordsMap.put(MetadataPartitionType.BLOOM_FILTERS, recordsRDD);
+    }
+
+    if (partitionTypes.contains(MetadataPartitionType.COLUMN_STATS)) {
+      final HoodieData<HoodieRecord> recordsRDD = HoodieTableMetadataUtil.convertFilesToColumnStatsRecords(
+          engineContext, Collections.emptyMap(), partitionToFilesMap, getRecordsGenerationParams());
+      partitionToRecordsMap.put(MetadataPartitionType.COLUMN_STATS, recordsRDD);
+    }
+
+    LOG.info("Committing " + partitions.size() + " partitions and " + totalFiles + " files to metadata");
+    commit(createInstantTime, partitionToRecordsMap, false);
+  }
+
+  private HoodieData<HoodieRecord> getFilesPartitionRecords(String createInstantTime, List<DirectoryInfo> partitionInfoList, HoodieRecord allPartitionRecord) {
     HoodieData<HoodieRecord> filesPartitionRecords = engineContext.parallelize(Arrays.asList(allPartitionRecord), 1);
     if (!partitionInfoList.isEmpty()) {
       HoodieData<HoodieRecord> fileListRecords = engineContext.parallelize(partitionInfoList, partitionInfoList.size()).map(partitionInfo -> {
@@ -893,23 +1042,7 @@ public abstract class HoodieBackedTableMetadataWriter implements HoodieTableMeta
       });
       filesPartitionRecords = filesPartitionRecords.union(fileListRecords);
     }
-    ValidationUtils.checkState(filesPartitionRecords.count() == (partitions.size() + 1));
-    partitionToRecordsMap.put(MetadataPartitionType.FILES, filesPartitionRecords);
-
-    if (enabledPartitionTypes.contains(MetadataPartitionType.BLOOM_FILTERS)) {
-      final HoodieData<HoodieRecord> recordsRDD = HoodieTableMetadataUtil.convertFilesToBloomFilterRecords(
-          engineContext, Collections.emptyMap(), partitionToFilesMap, getRecordsGenerationParams(), createInstantTime);
-      partitionToRecordsMap.put(MetadataPartitionType.BLOOM_FILTERS, recordsRDD);
-    }
-
-    if (enabledPartitionTypes.contains(MetadataPartitionType.COLUMN_STATS)) {
-      final HoodieData<HoodieRecord> recordsRDD = HoodieTableMetadataUtil.convertFilesToColumnStatsRecords(
-          engineContext, Collections.emptyMap(), partitionToFilesMap, getRecordsGenerationParams());
-      partitionToRecordsMap.put(MetadataPartitionType.COLUMN_STATS, recordsRDD);
-    }
-
-    LOG.info("Committing " + partitions.size() + " partitions and " + totalFiles + " files to metadata");
-    commit(createInstantTime, partitionToRecordsMap, false);
+    return filesPartitionRecords;
   }
 
   /**
diff --git a/hudi-client/hudi-client-common/src/main/java/org/apache/hudi/metadata/HoodieTableMetadataWriter.java b/hudi-client/hudi-client-common/src/main/java/org/apache/hudi/metadata/HoodieTableMetadataWriter.java
index 4f5ac02..777c785 100644
--- a/hudi-client/hudi-client-common/src/main/java/org/apache/hudi/metadata/HoodieTableMetadataWriter.java
+++ b/hudi-client/hudi-client-common/src/main/java/org/apache/hudi/metadata/HoodieTableMetadataWriter.java
@@ -19,11 +19,16 @@
 package org.apache.hudi.metadata;
 
 import org.apache.hudi.avro.model.HoodieCleanMetadata;
+import org.apache.hudi.avro.model.HoodieIndexPartitionInfo;
 import org.apache.hudi.avro.model.HoodieRestoreMetadata;
 import org.apache.hudi.avro.model.HoodieRollbackMetadata;
+import org.apache.hudi.common.engine.HoodieEngineContext;
 import org.apache.hudi.common.model.HoodieCommitMetadata;
+import org.apache.hudi.common.table.HoodieTableMetaClient;
 
+import java.io.IOException;
 import java.io.Serializable;
+import java.util.List;
 
 /**
  * Interface that supports updating metadata for a given table, as actions complete.
@@ -31,33 +36,62 @@ import java.io.Serializable;
 public interface HoodieTableMetadataWriter extends Serializable, AutoCloseable {
 
   /**
+   * Builds the given metadata partitions to create index.
+   *
+   * @param engineContext
+   * @param indexPartitionInfos - information about partitions to build such as partition type and base instant time
+   */
+  void buildMetadataPartitions(HoodieEngineContext engineContext, List<HoodieIndexPartitionInfo> indexPartitionInfos);
+
+  /**
+   * Initialize file groups for the given metadata partitions when indexing is requested.
+   *
+   * @param dataMetaClient     - meta client for the data table
+   * @param metadataPartitions - metadata partitions for which file groups needs to be initialized
+   * @param instantTime        - instant time of the index action
+   * @throws IOException
+   */
+  void initializeMetadataPartitions(HoodieTableMetaClient dataMetaClient, List<MetadataPartitionType> metadataPartitions, String instantTime) throws IOException;
+
+  /**
+   * Drop the given metadata partitions.
+   *
+   * @param metadataPartitions
+   * @throws IOException
+   */
+  void dropMetadataPartitions(List<MetadataPartitionType> metadataPartitions) throws IOException;
+
+  /**
    * Update the metadata table due to a COMMIT operation.
-   * @param commitMetadata commit metadata of the operation of interest.
-   * @param instantTime instant time of the commit.
+   *
+   * @param commitMetadata       commit metadata of the operation of interest.
+   * @param instantTime          instant time of the commit.
    * @param isTableServiceAction true if caller is a table service. false otherwise. Only regular write operations can trigger metadata table services and this argument
-   *                       will assist in this.
+   *                             will assist in this.
    */
   void update(HoodieCommitMetadata commitMetadata, String instantTime, boolean isTableServiceAction);
 
   /**
    * Update the metadata table due to a CLEAN operation.
+   *
    * @param cleanMetadata clean metadata of the operation of interest.
-   * @param instantTime instant time of the commit.
+   * @param instantTime   instant time of the commit.
    */
   void update(HoodieCleanMetadata cleanMetadata, String instantTime);
 
   /**
    * Update the metadata table due to a RESTORE operation.
+   *
    * @param restoreMetadata restore metadata of the operation of interest.
-   * @param instantTime instant time of the commit.
+   * @param instantTime     instant time of the commit.
    */
   void update(HoodieRestoreMetadata restoreMetadata, String instantTime);
 
   /**
    * Update the metadata table due to a ROLLBACK operation.
+   *
    * @param rollbackMetadata rollback metadata of the operation of interest.
-   * @param instantTime instant time of the commit.
+   * @param instantTime      instant time of the commit.
    */
   void update(HoodieRollbackMetadata rollbackMetadata, String instantTime);
-
 }
diff --git a/hudi-client/hudi-client-common/src/main/java/org/apache/hudi/table/HoodieTable.java b/hudi-client/hudi-client-common/src/main/java/org/apache/hudi/table/HoodieTable.java
index 032961a..f52d46a 100644
--- a/hudi-client/hudi-client-common/src/main/java/org/apache/hudi/table/HoodieTable.java
+++ b/hudi-client/hudi-client-common/src/main/java/org/apache/hudi/table/HoodieTable.java
@@ -28,6 +28,8 @@ import org.apache.hudi.avro.model.HoodieCleanMetadata;
 import org.apache.hudi.avro.model.HoodieCleanerPlan;
 import org.apache.hudi.avro.model.HoodieClusteringPlan;
 import org.apache.hudi.avro.model.HoodieCompactionPlan;
+import org.apache.hudi.avro.model.HoodieIndexCommitMetadata;
+import org.apache.hudi.avro.model.HoodieIndexPlan;
 import org.apache.hudi.avro.model.HoodieRestoreMetadata;
 import org.apache.hudi.avro.model.HoodieRestorePlan;
 import org.apache.hudi.avro.model.HoodieRollbackMetadata;
@@ -71,6 +73,7 @@ import org.apache.hudi.exception.HoodieUpsertException;
 import org.apache.hudi.index.HoodieIndex;
 import org.apache.hudi.metadata.HoodieTableMetadata;
 import org.apache.hudi.metadata.HoodieTableMetadataWriter;
+import org.apache.hudi.metadata.MetadataPartitionType;
 import org.apache.hudi.table.action.HoodieWriteMetadata;
 import org.apache.hudi.table.action.bootstrap.HoodieBootstrapWriteMetadata;
 import org.apache.hudi.table.marker.WriteMarkers;
@@ -431,7 +434,6 @@ public abstract class HoodieTable<T extends HoodieRecordPayload, I, K, O> implem
    */
   public abstract void rollbackBootstrap(HoodieEngineContext context, String instantTime);
 
-
   /**
    * Schedule cleaning for the instant time.
    *
@@ -482,6 +484,25 @@ public abstract class HoodieTable<T extends HoodieRecordPayload, I, K, O> implem
                                                   boolean skipLocking);
 
   /**
+   * Schedules Indexing for the table to the given instant.
+   *
+   * @param context HoodieEngineContext
+   * @param indexInstantTime Instant time for scheduling index action.
+   * @param partitionsToIndex List of {@link MetadataPartitionType} that should be indexed.
+   * @return HoodieIndexPlan containing metadata partitions and instant upto which they should be indexed.
+   */
+  public abstract Option<HoodieIndexPlan> scheduleIndexing(HoodieEngineContext context, String indexInstantTime, List<MetadataPartitionType> partitionsToIndex);
+
+  /**
+   * Execute requested index action.
+   *
+   * @param context HoodieEngineContext
+   * @param indexInstantTime Instant time for which index action was scheduled.
+   * @return HoodieIndexCommitMetadata containing write stats for each metadata partition.
+   */
+  public abstract Option<HoodieIndexCommitMetadata> index(HoodieEngineContext context, String indexInstantTime);
+
+  /**
    * Create a savepoint at the specified instant, so that the table can be restored
    * to this point-in-timeline later if needed.
    */
@@ -748,7 +769,7 @@ public abstract class HoodieTable<T extends HoodieRecordPayload, I, K, O> implem
    * Get Table metadata writer.
    *
    * @param triggeringInstantTimestamp - The instant that is triggering this metadata write
-   * @return instance of {@link HoodieTableMetadataWriter
+   * @return instance of {@link HoodieTableMetadataWriter}
    */
   public final Option<HoodieTableMetadataWriter> getMetadataWriter(String triggeringInstantTimestamp) {
     return getMetadataWriter(triggeringInstantTimestamp, Option.empty());
diff --git a/hudi-client/hudi-client-common/src/main/java/org/apache/hudi/table/action/index/RunIndexActionExecutor.java b/hudi-client/hudi-client-common/src/main/java/org/apache/hudi/table/action/index/RunIndexActionExecutor.java
new file mode 100644
index 0000000..8c86a29
--- /dev/null
+++ b/hudi-client/hudi-client-common/src/main/java/org/apache/hudi/table/action/index/RunIndexActionExecutor.java
@@ -0,0 +1,390 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.hudi.table.action.index;
+
+import org.apache.hudi.avro.model.HoodieCleanMetadata;
+import org.apache.hudi.avro.model.HoodieIndexCommitMetadata;
+import org.apache.hudi.avro.model.HoodieIndexPartitionInfo;
+import org.apache.hudi.avro.model.HoodieIndexPlan;
+import org.apache.hudi.avro.model.HoodieRestoreMetadata;
+import org.apache.hudi.avro.model.HoodieRollbackMetadata;
+import org.apache.hudi.client.transaction.TransactionManager;
+import org.apache.hudi.common.engine.HoodieEngineContext;
+import org.apache.hudi.common.model.HoodieCommitMetadata;
+import org.apache.hudi.common.model.HoodieRecordPayload;
+import org.apache.hudi.common.table.HoodieTableConfig;
+import org.apache.hudi.common.table.HoodieTableMetaClient;
+import org.apache.hudi.common.table.timeline.HoodieInstant;
+import org.apache.hudi.common.table.timeline.HoodieTimeline;
+import org.apache.hudi.common.table.timeline.TimelineMetadataUtils;
+import org.apache.hudi.common.util.CleanerUtils;
+import org.apache.hudi.common.util.CollectionUtils;
+import org.apache.hudi.common.util.HoodieTimer;
+import org.apache.hudi.common.util.Option;
+import org.apache.hudi.common.util.StringUtils;
+import org.apache.hudi.config.HoodieWriteConfig;
+import org.apache.hudi.exception.HoodieIndexException;
+import org.apache.hudi.metadata.HoodieTableMetadataWriter;
+import org.apache.hudi.metadata.MetadataPartitionType;
+import org.apache.hudi.table.HoodieTable;
+import org.apache.hudi.table.action.BaseActionExecutor;
+
+import org.apache.hadoop.fs.Path;
+import org.apache.log4j.LogManager;
+import org.apache.log4j.Logger;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Locale;
+import java.util.Set;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.Future;
+import java.util.concurrent.TimeUnit;
+import java.util.stream.Collectors;
+
+import static org.apache.hudi.common.model.WriteConcurrencyMode.OPTIMISTIC_CONCURRENCY_CONTROL;
+import static org.apache.hudi.common.table.HoodieTableConfig.TABLE_METADATA_PARTITIONS;
+import static org.apache.hudi.common.table.HoodieTableConfig.TABLE_METADATA_PARTITIONS_INFLIGHT;
+import static org.apache.hudi.common.table.timeline.HoodieInstant.State.COMPLETED;
+import static org.apache.hudi.common.table.timeline.HoodieInstant.State.REQUESTED;
+import static org.apache.hudi.common.table.timeline.HoodieTimeline.CLEAN_ACTION;
+import static org.apache.hudi.common.table.timeline.HoodieTimeline.GREATER_THAN_OR_EQUALS;
+import static org.apache.hudi.common.table.timeline.HoodieTimeline.INDEXING_ACTION;
+import static org.apache.hudi.common.table.timeline.HoodieTimeline.RESTORE_ACTION;
+import static org.apache.hudi.common.table.timeline.HoodieTimeline.ROLLBACK_ACTION;
+import static org.apache.hudi.config.HoodieWriteConfig.WRITE_CONCURRENCY_MODE;
+import static org.apache.hudi.metadata.HoodieTableMetadata.getMetadataTableBasePath;
+import static org.apache.hudi.metadata.HoodieTableMetadataUtil.deleteMetadataPartition;
+import static org.apache.hudi.metadata.HoodieTableMetadataUtil.getCompletedMetadataPartitions;
+import static org.apache.hudi.metadata.HoodieTableMetadataUtil.getInflightAndCompletedMetadataPartitions;
+import static org.apache.hudi.metadata.HoodieTableMetadataUtil.getInflightMetadataPartitions;
+import static org.apache.hudi.metadata.HoodieTableMetadataUtil.metadataPartitionExists;
+
+/**
+ * Reads the index plan and executes the plan.
+ * It also reconciles updates on data timeline while indexing was in progress.
+ */
+public class RunIndexActionExecutor<T extends HoodieRecordPayload, I, K, O> extends BaseActionExecutor<T, I, K, O, Option<HoodieIndexCommitMetadata>> {
+
+  private static final Logger LOG = LogManager.getLogger(RunIndexActionExecutor.class);
+  private static final Integer INDEX_COMMIT_METADATA_VERSION_1 = 1;
+  private static final Integer LATEST_INDEX_COMMIT_METADATA_VERSION = INDEX_COMMIT_METADATA_VERSION_1;
+  private static final int MAX_CONCURRENT_INDEXING = 1;
+  private static final int TIMELINE_RELOAD_INTERVAL_MILLIS = 5000;
+
+  // we use this to update the latest instant in data timeline that has been indexed in metadata table
+  // this needs to be volatile as it can be updated in the IndexingCheckTask spawned by this executor
+  // assumption is that only one indexer can execute at a time
+  private volatile String currentCaughtupInstant;
+
+  private final TransactionManager txnManager;
+
+  public RunIndexActionExecutor(HoodieEngineContext context, HoodieWriteConfig config, HoodieTable<T, I, K, O> table, String instantTime) {
+    super(context, config, table, instantTime);
+    this.txnManager = new TransactionManager(config, table.getMetaClient().getFs());
+  }
+
+  @Override
+  public Option<HoodieIndexCommitMetadata> execute() {
+    HoodieTimer indexTimer = new HoodieTimer();
+    indexTimer.startTimer();
+
+    HoodieInstant indexInstant = validateAndGetIndexInstant();
+    // read HoodieIndexPlan
+    HoodieIndexPlan indexPlan;
+    try {
+      indexPlan = TimelineMetadataUtils.deserializeIndexPlan(table.getActiveTimeline().readIndexPlanAsBytes(indexInstant).get());
+    } catch (IOException e) {
+      throw new HoodieIndexException("Failed to read the index plan for instant: " + indexInstant);
+    }
+    List<HoodieIndexPartitionInfo> indexPartitionInfos = indexPlan.getIndexPartitionInfos();
+    try {
+      if (indexPartitionInfos == null || indexPartitionInfos.isEmpty()) {
+        throw new HoodieIndexException(String.format("No partitions to index for instant: %s", instantTime));
+      }
+      // ensure the metadata partitions for the requested indexes are not already available (or inflight)
+      Set<String> indexesInflightOrCompleted = getInflightAndCompletedMetadataPartitions(table.getMetaClient().getTableConfig());
+      Set<String> requestedPartitions = indexPartitionInfos.stream()
+          .map(HoodieIndexPartitionInfo::getMetadataPartitionPath).collect(Collectors.toSet());
+      requestedPartitions.retainAll(indexesInflightOrCompleted);
+      if (!requestedPartitions.isEmpty()) {
+        throw new HoodieIndexException(String.format("Following partitions already exist or inflight: %s", requestedPartitions));
+      }
+
+      // transition requested indexInstant to inflight
+      table.getActiveTimeline().transitionIndexRequestedToInflight(indexInstant, Option.empty());
+      // start indexing for each partition
+      HoodieTableMetadataWriter metadataWriter = table.getMetadataWriter(instantTime)
+          .orElseThrow(() -> new HoodieIndexException(String.format("Could not get metadata writer to run index action for instant: %s", instantTime)));
+      // this will only build index upto base instant as generated by the plan, we will be doing catchup later
+      String indexUptoInstant = indexPartitionInfos.get(0).getIndexUptoInstant();
+      LOG.info("Starting Index Building with base instant: " + indexUptoInstant);
+      metadataWriter.buildMetadataPartitions(context, indexPartitionInfos);
+
+      // get remaining instants to catchup
+      List<HoodieInstant> instantsToCatchup = getInstantsToCatchup(indexUptoInstant);
+      LOG.info("Total remaining instants to index: " + instantsToCatchup.size());
+
+      // reconcile with metadata table timeline
+      String metadataBasePath = getMetadataTableBasePath(table.getMetaClient().getBasePath());
+      HoodieTableMetaClient metadataMetaClient = HoodieTableMetaClient.builder().setConf(hadoopConf).setBasePath(metadataBasePath).build();
+      Set<String> metadataCompletedTimestamps = getCompletedArchivedAndActiveInstantsAfter(indexUptoInstant, metadataMetaClient).stream()
+          .map(HoodieInstant::getTimestamp).collect(Collectors.toSet());
+
+      // index catchup for all remaining instants with a timeout
+      currentCaughtupInstant = indexUptoInstant;
+      catchupWithInflightWriters(metadataWriter, instantsToCatchup, metadataMetaClient, metadataCompletedTimestamps);
+      // save index commit metadata and update table config
+      List<HoodieIndexPartitionInfo> finalIndexPartitionInfos = indexPartitionInfos.stream()
+          .map(info -> new HoodieIndexPartitionInfo(
+              info.getVersion(),
+              info.getMetadataPartitionPath(),
+              currentCaughtupInstant))
+          .collect(Collectors.toList());
+      HoodieIndexCommitMetadata indexCommitMetadata = HoodieIndexCommitMetadata.newBuilder()
+          .setVersion(LATEST_INDEX_COMMIT_METADATA_VERSION).setIndexPartitionInfos(finalIndexPartitionInfos).build();
+      updateTableConfigAndTimeline(indexInstant, finalIndexPartitionInfos, indexCommitMetadata);
+      return Option.of(indexCommitMetadata);
+    } catch (IOException e) {
+      // abort gracefully
+      abort(indexInstant, indexPartitionInfos.stream().map(HoodieIndexPartitionInfo::getMetadataPartitionPath).collect(Collectors.toSet()));
+      throw new HoodieIndexException(String.format("Unable to index instant: %s", indexInstant));
+    }
+  }
+
+  private void abort(HoodieInstant indexInstant, Set<String> requestedPartitions) {
+    Set<String> inflightPartitions = getInflightMetadataPartitions(table.getMetaClient().getTableConfig());
+    Set<String> completedPartitions = getCompletedMetadataPartitions(table.getMetaClient().getTableConfig());
+    // update table config
+    requestedPartitions.forEach(partition -> {
+      inflightPartitions.remove(partition);
+      completedPartitions.remove(partition);
+    });
+    table.getMetaClient().getTableConfig().setValue(TABLE_METADATA_PARTITIONS_INFLIGHT.key(), String.join(",", inflightPartitions));
+    table.getMetaClient().getTableConfig().setValue(TABLE_METADATA_PARTITIONS.key(), String.join(",", completedPartitions));
+    HoodieTableConfig.update(table.getMetaClient().getFs(), new Path(table.getMetaClient().getMetaPath()), table.getMetaClient().getTableConfig().getProps());
+
+    // delete metadata partition
+    requestedPartitions.forEach(partition -> {
+      MetadataPartitionType partitionType = MetadataPartitionType.valueOf(partition.toUpperCase(Locale.ROOT));
+      if (metadataPartitionExists(table.getMetaClient().getBasePath(), context, partitionType)) {
+        deleteMetadataPartition(table.getMetaClient().getBasePath(), context, partitionType);
+      }
+    });
+
+    // delete inflight instant
+    table.getMetaClient().reloadActiveTimeline().deleteInstantFileIfExists(HoodieTimeline.getIndexInflightInstant(indexInstant.getTimestamp()));
+  }
+
+  private List<HoodieInstant> getInstantsToCatchup(String indexUptoInstant) {
+    // since only write timeline was considered while scheduling index, which gives us the indexUpto instant
+    // here we consider other valid actions to pick catchupStart instant
+    Set<String> validActions = CollectionUtils.createSet(CLEAN_ACTION, RESTORE_ACTION, ROLLBACK_ACTION);
+    Option<HoodieInstant> catchupStartInstant = table.getMetaClient().reloadActiveTimeline()
+        .getTimelineOfActions(validActions)
+        .filterInflightsAndRequested()
+        .findInstantsBefore(indexUptoInstant)
+        .firstInstant();
+    // get all instants since the plan completed (both from active timeline and archived timeline)
+    List<HoodieInstant> instantsToIndex;
+    if (catchupStartInstant.isPresent()) {
+      instantsToIndex = getRemainingArchivedAndActiveInstantsSince(catchupStartInstant.get().getTimestamp(), table.getMetaClient());
+    } else {
+      instantsToIndex = getRemainingArchivedAndActiveInstantsSince(indexUptoInstant, table.getMetaClient());
+    }
+    return instantsToIndex;
+  }
+
+  private HoodieInstant validateAndGetIndexInstant() {
+    // ensure lock provider configured
+    if (!config.getWriteConcurrencyMode().supportsOptimisticConcurrencyControl() || StringUtils.isNullOrEmpty(config.getLockProviderClass())) {
+      throw new HoodieIndexException(String.format("Need to set %s as %s and configure lock provider class",
+          WRITE_CONCURRENCY_MODE.key(), OPTIMISTIC_CONCURRENCY_CONTROL.name()));
+    }
+
+    return table.getActiveTimeline()
+        .filterPendingIndexTimeline()
+        .filter(instant -> instant.getTimestamp().equals(instantTime) && REQUESTED.equals(instant.getState()))
+        .lastInstant()
+        .orElseThrow(() -> new HoodieIndexException(String.format("No requested index instant found: %s", instantTime)));
+  }
+
+  private void updateTableConfigAndTimeline(HoodieInstant indexInstant,
+                                            List<HoodieIndexPartitionInfo> finalIndexPartitionInfos,
+                                            HoodieIndexCommitMetadata indexCommitMetadata) throws IOException {
+    try {
+      // update the table config and timeline in a lock as there could be another indexer running
+      txnManager.beginTransaction();
+      updateMetadataPartitionsTableConfig(table.getMetaClient(),
+          finalIndexPartitionInfos.stream().map(HoodieIndexPartitionInfo::getMetadataPartitionPath).collect(Collectors.toSet()));
+      table.getActiveTimeline().saveAsComplete(
+          new HoodieInstant(true, INDEXING_ACTION, indexInstant.getTimestamp()),
+          TimelineMetadataUtils.serializeIndexCommitMetadata(indexCommitMetadata));
+    } finally {
+      txnManager.endTransaction();
+    }
+  }
+
+  private void catchupWithInflightWriters(HoodieTableMetadataWriter metadataWriter, List<HoodieInstant> instantsToIndex,
+                                          HoodieTableMetaClient metadataMetaClient, Set<String> metadataCompletedTimestamps) {
+    ExecutorService executorService = Executors.newFixedThreadPool(MAX_CONCURRENT_INDEXING);
+    Future<?> indexingCatchupTaskFuture = executorService.submit(
+        new IndexingCatchupTask(metadataWriter, instantsToIndex, metadataCompletedTimestamps, table.getMetaClient(), metadataMetaClient));
+    try {
+      LOG.info("Starting index catchup task");
+      indexingCatchupTaskFuture.get(config.getIndexingCheckTimeoutSeconds(), TimeUnit.SECONDS);
+    } catch (Exception e) {
+      indexingCatchupTaskFuture.cancel(true);
+      throw new HoodieIndexException(String.format("Index catchup failed. Current indexed instant = %s. Aborting!", currentCaughtupInstant), e);
+    } finally {
+      executorService.shutdownNow();
+    }
+  }
+
+  private static List<HoodieInstant> getRemainingArchivedAndActiveInstantsSince(String instant, HoodieTableMetaClient metaClient) {
+    List<HoodieInstant> remainingInstantsToIndex = metaClient.getArchivedTimeline().getInstants()
+        .filter(i -> HoodieTimeline.compareTimestamps(i.getTimestamp(), GREATER_THAN_OR_EQUALS, instant))
+        .filter(i -> !INDEXING_ACTION.equals(i.getAction()))
+        .collect(Collectors.toList());
+    remainingInstantsToIndex.addAll(metaClient.getActiveTimeline().findInstantsAfter(instant).getInstants()
+        .filter(i -> HoodieTimeline.compareTimestamps(i.getTimestamp(), GREATER_THAN_OR_EQUALS, instant))
+        .filter(i -> !INDEXING_ACTION.equals(i.getAction()))
+        .collect(Collectors.toList()));
+    return remainingInstantsToIndex;
+  }
+
+  private static List<HoodieInstant> getCompletedArchivedAndActiveInstantsAfter(String instant, HoodieTableMetaClient metaClient) {
+    List<HoodieInstant> completedInstants = metaClient.getArchivedTimeline().filterCompletedInstants().findInstantsAfter(instant)
+        .getInstants().filter(i -> !INDEXING_ACTION.equals(i.getAction())).collect(Collectors.toList());
+    completedInstants.addAll(metaClient.reloadActiveTimeline().filterCompletedInstants().findInstantsAfter(instant)
+        .getInstants().filter(i -> !INDEXING_ACTION.equals(i.getAction())).collect(Collectors.toList()));
+    return completedInstants;
+  }
+
+  private void updateMetadataPartitionsTableConfig(HoodieTableMetaClient metaClient, Set<String> metadataPartitions) {
+    // remove from inflight and update completed indexes
+    Set<String> inflightPartitions = getInflightMetadataPartitions(metaClient.getTableConfig());
+    Set<String> completedPartitions = getCompletedMetadataPartitions(metaClient.getTableConfig());
+    inflightPartitions.removeAll(metadataPartitions);
+    completedPartitions.addAll(metadataPartitions);
+    // update table config
+    metaClient.getTableConfig().setValue(TABLE_METADATA_PARTITIONS_INFLIGHT.key(), String.join(",", inflightPartitions));
+    metaClient.getTableConfig().setValue(TABLE_METADATA_PARTITIONS.key(), String.join(",", completedPartitions));
+    HoodieTableConfig.update(metaClient.getFs(), new Path(metaClient.getMetaPath()), metaClient.getTableConfig().getProps());
+  }
+
+  /**
+   * Indexing check runs for instants that completed after the base instant (in the index plan).
+   * It will check if these later instants have logged updates to metadata table or not.
+   * If not, then it will do the update. If a later instant is inflight, it will wait until it is completed or the task times out.
+   */
+  class IndexingCatchupTask implements Runnable {
+
+    private final HoodieTableMetadataWriter metadataWriter;
+    private final List<HoodieInstant> instantsToIndex;
+    private final Set<String> metadataCompletedInstants;
+    private final HoodieTableMetaClient metaClient;
+    private final HoodieTableMetaClient metadataMetaClient;
+
+    IndexingCatchupTask(HoodieTableMetadataWriter metadataWriter,
+                        List<HoodieInstant> instantsToIndex,
+                        Set<String> metadataCompletedInstants,
+                        HoodieTableMetaClient metaClient,
+                        HoodieTableMetaClient metadataMetaClient) {
+      this.metadataWriter = metadataWriter;
+      this.instantsToIndex = instantsToIndex;
+      this.metadataCompletedInstants = metadataCompletedInstants;
+      this.metaClient = metaClient;
+      this.metadataMetaClient = metadataMetaClient;
+    }
+
+    @Override
+    public void run() {
+      for (HoodieInstant instant : instantsToIndex) {
+        // metadata index already updated for this instant
+        if (!metadataCompletedInstants.isEmpty() && metadataCompletedInstants.contains(instant.getTimestamp())) {
+          currentCaughtupInstant = instant.getTimestamp();
+          continue;
+        }
+        while (!instant.isCompleted()) {
+          try {
+            LOG.warn("instant not completed, reloading timeline " + instant);
+            // reload timeline and fetch instant details again wait until timeout
+            String instantTime = instant.getTimestamp();
+            Option<HoodieInstant> currentInstant = metaClient.reloadActiveTimeline()
+                .filterCompletedInstants().filter(i -> i.getTimestamp().equals(instantTime)).firstInstant();
+            instant = currentInstant.orElse(instant);
+            // so that timeline is not reloaded very frequently
+            Thread.sleep(TIMELINE_RELOAD_INTERVAL_MILLIS);
+          } catch (InterruptedException e) {
+            throw new HoodieIndexException(String.format("Thread interrupted while running indexing check for instant: %s", instant), e);
+          }
+        }
+        // if instant completed, ensure that there was metadata commit, else update metadata for this completed instant
+        if (COMPLETED.equals(instant.getState())) {
+          String instantTime = instant.getTimestamp();
+          Option<HoodieInstant> metadataInstant = metadataMetaClient.reloadActiveTimeline()
+              .filterCompletedInstants().filter(i -> i.getTimestamp().equals(instantTime)).firstInstant();
+          if (metadataInstant.isPresent()) {
+            currentCaughtupInstant = instantTime;
+            continue;
+          }
+          try {
+            // we need take a lock here as inflight writer could also try to update the timeline
+            txnManager.beginTransaction(Option.of(instant), Option.empty());
+            LOG.info("Updating metadata table for instant: " + instant);
+            switch (instant.getAction()) {
+              // TODO: see if this can be moved to metadata writer itself
+              case HoodieTimeline.COMMIT_ACTION:
+              case HoodieTimeline.DELTA_COMMIT_ACTION:
+              case HoodieTimeline.REPLACE_COMMIT_ACTION:
+                HoodieCommitMetadata commitMetadata = HoodieCommitMetadata.fromBytes(
+                    table.getActiveTimeline().getInstantDetails(instant).get(), HoodieCommitMetadata.class);
+                // do not trigger any table service as partition is not fully built out yet
+                metadataWriter.update(commitMetadata, instant.getTimestamp(), false);
+                break;
+              case CLEAN_ACTION:
+                HoodieCleanMetadata cleanMetadata = CleanerUtils.getCleanerMetadata(table.getMetaClient(), instant);
+                metadataWriter.update(cleanMetadata, instant.getTimestamp());
+                break;
+              case RESTORE_ACTION:
+                HoodieRestoreMetadata restoreMetadata = TimelineMetadataUtils.deserializeHoodieRestoreMetadata(
+                    table.getActiveTimeline().getInstantDetails(instant).get());
+                metadataWriter.update(restoreMetadata, instant.getTimestamp());
+                break;
+              case ROLLBACK_ACTION:
+                HoodieRollbackMetadata rollbackMetadata = TimelineMetadataUtils.deserializeHoodieRollbackMetadata(
+                    table.getActiveTimeline().getInstantDetails(instant).get());
+                metadataWriter.update(rollbackMetadata, instant.getTimestamp());
+                break;
+              default:
+                throw new IllegalStateException("Unexpected value: " + instant.getAction());
+            }
+          } catch (IOException e) {
+            throw new HoodieIndexException(String.format("Could not update metadata partition for instant: %s", instant), e);
+          } finally {
+            txnManager.endTransaction(Option.of(instant));
+          }
+        }
+      }
+    }
+  }
+}
diff --git a/hudi-client/hudi-client-common/src/main/java/org/apache/hudi/table/action/index/ScheduleIndexActionExecutor.java b/hudi-client/hudi-client-common/src/main/java/org/apache/hudi/table/action/index/ScheduleIndexActionExecutor.java
new file mode 100644
index 0000000..5afebee
--- /dev/null
+++ b/hudi-client/hudi-client-common/src/main/java/org/apache/hudi/table/action/index/ScheduleIndexActionExecutor.java
@@ -0,0 +1,152 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.hudi.table.action.index;
+
+import org.apache.hudi.avro.model.HoodieIndexPartitionInfo;
+import org.apache.hudi.avro.model.HoodieIndexPlan;
+import org.apache.hudi.client.transaction.TransactionManager;
+import org.apache.hudi.common.engine.HoodieEngineContext;
+import org.apache.hudi.common.model.HoodieRecordPayload;
+import org.apache.hudi.common.table.timeline.HoodieInstant;
+import org.apache.hudi.common.table.timeline.HoodieTimeline;
+import org.apache.hudi.common.table.timeline.TimelineMetadataUtils;
+import org.apache.hudi.common.util.Option;
+import org.apache.hudi.common.util.StringUtils;
+import org.apache.hudi.config.HoodieWriteConfig;
+import org.apache.hudi.exception.HoodieIOException;
+import org.apache.hudi.exception.HoodieIndexException;
+import org.apache.hudi.metadata.HoodieTableMetadataWriter;
+import org.apache.hudi.metadata.MetadataPartitionType;
+import org.apache.hudi.table.HoodieTable;
+import org.apache.hudi.table.action.BaseActionExecutor;
+
+import org.apache.log4j.LogManager;
+import org.apache.log4j.Logger;
+
+import java.io.IOException;
+import java.util.EnumSet;
+import java.util.List;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+import static org.apache.hudi.common.model.WriteConcurrencyMode.OPTIMISTIC_CONCURRENCY_CONTROL;
+import static org.apache.hudi.config.HoodieWriteConfig.WRITE_CONCURRENCY_MODE;
+import static org.apache.hudi.metadata.HoodieTableMetadataUtil.deleteMetadataPartition;
+import static org.apache.hudi.metadata.HoodieTableMetadataUtil.getInflightAndCompletedMetadataPartitions;
+import static org.apache.hudi.metadata.HoodieTableMetadataUtil.metadataPartitionExists;
+
+/**
+ * Schedules INDEX action.
+ * <li>
+ * 1. Fetch last completed instant on data timeline.
+ * 2. Write the index plan to the <instant>.index.requested.
+ * 3. Initialize file groups for the enabled partition types within a transaction.
+ * </li>
+ */
+public class ScheduleIndexActionExecutor<T extends HoodieRecordPayload, I, K, O> extends BaseActionExecutor<T, I, K, O, Option<HoodieIndexPlan>> {
+
+  private static final Logger LOG = LogManager.getLogger(ScheduleIndexActionExecutor.class);
+  private static final Integer INDEX_PLAN_VERSION_1 = 1;
+  private static final Integer LATEST_INDEX_PLAN_VERSION = INDEX_PLAN_VERSION_1;
+
+  private final List<MetadataPartitionType> partitionIndexTypes;
+  private final TransactionManager txnManager;
+
+  public ScheduleIndexActionExecutor(HoodieEngineContext context,
+                                     HoodieWriteConfig config,
+                                     HoodieTable<T, I, K, O> table,
+                                     String instantTime,
+                                     List<MetadataPartitionType> partitionIndexTypes) {
+    super(context, config, table, instantTime);
+    this.partitionIndexTypes = partitionIndexTypes;
+    this.txnManager = new TransactionManager(config, table.getMetaClient().getFs());
+  }
+
+  @Override
+  public Option<HoodieIndexPlan> execute() {
+    validateBeforeScheduling();
+    // make sure that it is idempotent, check with previously pending index operations.
+    Set<String> indexesInflightOrCompleted = getInflightAndCompletedMetadataPartitions(table.getMetaClient().getTableConfig());
+    Set<String> requestedPartitions = partitionIndexTypes.stream().map(MetadataPartitionType::getPartitionPath).collect(Collectors.toSet());
+    requestedPartitions.removeAll(indexesInflightOrCompleted);
+    if (!requestedPartitions.isEmpty()) {
+      LOG.warn(String.format("Following partitions already exist or inflight: %s. Going to index only these partitions: %s",
+          indexesInflightOrCompleted, requestedPartitions));
+    } else {
+      LOG.error("All requested index types are inflight or completed: " + partitionIndexTypes);
+      return Option.empty();
+    }
+    List<MetadataPartitionType> finalPartitionsToIndex = partitionIndexTypes.stream()
+        .filter(p -> requestedPartitions.contains(p.getPartitionPath())).collect(Collectors.toList());
+    final HoodieInstant indexInstant = HoodieTimeline.getIndexRequestedInstant(instantTime);
+    try {
+      this.txnManager.beginTransaction(Option.of(indexInstant), Option.empty());
+      // get last completed instant
+      Option<HoodieInstant> indexUptoInstant = table.getActiveTimeline().getContiguousCompletedWriteTimeline().lastInstant();
+      if (indexUptoInstant.isPresent()) {
+        // start initializing file groups
+        // in case FILES partition itself was not initialized before (i.e. metadata was never enabled), this will initialize synchronously
+        HoodieTableMetadataWriter metadataWriter = table.getMetadataWriter(instantTime)
+            .orElseThrow(() -> new HoodieIndexException(String.format("Could not get metadata writer to initialize filegroups for indexing for instant: %s", instantTime)));
+        metadataWriter.initializeMetadataPartitions(table.getMetaClient(), finalPartitionsToIndex, indexInstant.getTimestamp());
+
+        // for each partitionToIndex add that time to the plan
+        List<HoodieIndexPartitionInfo> indexPartitionInfos = finalPartitionsToIndex.stream()
+            .map(p -> new HoodieIndexPartitionInfo(LATEST_INDEX_PLAN_VERSION, p.getPartitionPath(), indexUptoInstant.get().getTimestamp()))
+            .collect(Collectors.toList());
+        HoodieIndexPlan indexPlan = new HoodieIndexPlan(LATEST_INDEX_PLAN_VERSION, indexPartitionInfos);
+        // update data timeline with requested instant
+        table.getActiveTimeline().saveToPendingIndexAction(indexInstant, TimelineMetadataUtils.serializeIndexPlan(indexPlan));
+        return Option.of(indexPlan);
+      }
+    } catch (IOException e) {
+      LOG.error("Could not initialize file groups", e);
+      // abort gracefully
+      abort(indexInstant);
+      throw new HoodieIOException(e.getMessage(), e);
+    } finally {
+      this.txnManager.endTransaction(Option.of(indexInstant));
+    }
+
+    return Option.empty();
+  }
+
+  private void validateBeforeScheduling() {
+    if (!EnumSet.allOf(MetadataPartitionType.class).containsAll(partitionIndexTypes)) {
+      throw new HoodieIndexException("Not all index types are valid: " + partitionIndexTypes);
+    }
+    // ensure lock provider configured
+    if (!config.getWriteConcurrencyMode().supportsOptimisticConcurrencyControl() || StringUtils.isNullOrEmpty(config.getLockProviderClass())) {
+      throw new HoodieIndexException(String.format("Need to set %s as %s and configure lock provider class",
+          WRITE_CONCURRENCY_MODE.key(), OPTIMISTIC_CONCURRENCY_CONTROL.name()));
+    }
+  }
+
+  private void abort(HoodieInstant indexInstant) {
+    // delete metadata partition
+    partitionIndexTypes.forEach(partitionType -> {
+      if (metadataPartitionExists(table.getMetaClient().getBasePath(), context, partitionType)) {
+        deleteMetadataPartition(table.getMetaClient().getBasePath(), context, partitionType);
+      }
+    });
+    // delete requested instant
+    table.getMetaClient().reloadActiveTimeline().deleteInstantFileIfExists(indexInstant);
+  }
+}
diff --git a/hudi-client/hudi-client-common/src/main/java/org/apache/hudi/table/upgrade/FourToThreeDowngradeHandler.java b/hudi-client/hudi-client-common/src/main/java/org/apache/hudi/table/upgrade/FourToThreeDowngradeHandler.java
index 17dc01d..86a594a 100644
--- a/hudi-client/hudi-client-common/src/main/java/org/apache/hudi/table/upgrade/FourToThreeDowngradeHandler.java
+++ b/hudi-client/hudi-client-common/src/main/java/org/apache/hudi/table/upgrade/FourToThreeDowngradeHandler.java
@@ -22,6 +22,7 @@ package org.apache.hudi.table.upgrade;
 import org.apache.hudi.common.config.ConfigProperty;
 import org.apache.hudi.common.engine.HoodieEngineContext;
 import org.apache.hudi.config.HoodieWriteConfig;
+import org.apache.hudi.metadata.HoodieTableMetadataUtil;
 
 import java.util.Collections;
 import java.util.Map;
@@ -33,6 +34,11 @@ public class FourToThreeDowngradeHandler implements DowngradeHandler {
 
   @Override
   public Map<ConfigProperty, String> downgrade(HoodieWriteConfig config, HoodieEngineContext context, String instantTime, SupportsUpgradeDowngrade upgradeDowngradeHelper) {
+    if (config.isMetadataTableEnabled()) {
+      // Metadata Table in version 4 has a schema that is not forward compatible.
+      // Hence, it is safe to delete the metadata table, which will be re-initialized in subsequent commit.
+      HoodieTableMetadataUtil.deleteMetadataTable(config.getBasePath(), context);
+    }
     return Collections.emptyMap();
   }
 }
diff --git a/hudi-client/hudi-client-common/src/main/java/org/apache/hudi/table/upgrade/ThreeToFourUpgradeHandler.java b/hudi-client/hudi-client-common/src/main/java/org/apache/hudi/table/upgrade/ThreeToFourUpgradeHandler.java
index 72e96bb..4da675e 100644
--- a/hudi-client/hudi-client-common/src/main/java/org/apache/hudi/table/upgrade/ThreeToFourUpgradeHandler.java
+++ b/hudi-client/hudi-client-common/src/main/java/org/apache/hudi/table/upgrade/ThreeToFourUpgradeHandler.java
@@ -23,10 +23,15 @@ import org.apache.hudi.common.config.ConfigProperty;
 import org.apache.hudi.common.engine.HoodieEngineContext;
 import org.apache.hudi.common.table.HoodieTableConfig;
 import org.apache.hudi.config.HoodieWriteConfig;
+import org.apache.hudi.metadata.MetadataPartitionType;
 
 import java.util.Hashtable;
 import java.util.Map;
 
+import static org.apache.hudi.common.table.HoodieTableConfig.TABLE_CHECKSUM;
+import static org.apache.hudi.common.table.HoodieTableConfig.TABLE_METADATA_PARTITIONS;
+import static org.apache.hudi.metadata.HoodieTableMetadataUtil.metadataPartitionExists;
+
 /**
  * UpgradeHandler to assist in upgrading {@link org.apache.hudi.table.HoodieTable} from version 3 to 4.
  */
@@ -35,7 +40,12 @@ public class ThreeToFourUpgradeHandler implements UpgradeHandler {
   @Override
   public Map<ConfigProperty, String> upgrade(HoodieWriteConfig config, HoodieEngineContext context, String instantTime, SupportsUpgradeDowngrade upgradeDowngradeHelper) {
     Map<ConfigProperty, String> tablePropsToAdd = new Hashtable<>();
-    tablePropsToAdd.put(HoodieTableConfig.TABLE_CHECKSUM, String.valueOf(HoodieTableConfig.generateChecksum(config.getProps())));
+    tablePropsToAdd.put(TABLE_CHECKSUM, String.valueOf(HoodieTableConfig.generateChecksum(config.getProps())));
+    // if metadata is enabled and files partition exist then update TABLE_METADATA_INDEX_COMPLETED
+    // schema for the files partition is same between the two versions
+    if (config.isMetadataTableEnabled() && metadataPartitionExists(config.getBasePath(), context, MetadataPartitionType.FILES)) {
+      tablePropsToAdd.put(TABLE_METADATA_PARTITIONS, MetadataPartitionType.FILES.getPartitionPath());
+    }
     return tablePropsToAdd;
   }
 }
diff --git a/hudi-client/hudi-flink-client/src/main/java/org/apache/hudi/table/HoodieFlinkCopyOnWriteTable.java b/hudi-client/hudi-flink-client/src/main/java/org/apache/hudi/table/HoodieFlinkCopyOnWriteTable.java
index f00dbfd..9ab633f 100644
--- a/hudi-client/hudi-flink-client/src/main/java/org/apache/hudi/table/HoodieFlinkCopyOnWriteTable.java
+++ b/hudi-client/hudi-flink-client/src/main/java/org/apache/hudi/table/HoodieFlinkCopyOnWriteTable.java
@@ -22,6 +22,8 @@ import org.apache.hudi.avro.model.HoodieCleanMetadata;
 import org.apache.hudi.avro.model.HoodieCleanerPlan;
 import org.apache.hudi.avro.model.HoodieClusteringPlan;
 import org.apache.hudi.avro.model.HoodieCompactionPlan;
+import org.apache.hudi.avro.model.HoodieIndexCommitMetadata;
+import org.apache.hudi.avro.model.HoodieIndexPlan;
 import org.apache.hudi.avro.model.HoodieRestoreMetadata;
 import org.apache.hudi.avro.model.HoodieRestorePlan;
 import org.apache.hudi.avro.model.HoodieRollbackMetadata;
@@ -48,6 +50,7 @@ import org.apache.hudi.io.HoodieSortedMergeHandle;
 import org.apache.hudi.io.HoodieWriteHandle;
 import org.apache.hudi.keygen.BaseKeyGenerator;
 import org.apache.hudi.keygen.factory.HoodieAvroKeyGeneratorFactory;
+import org.apache.hudi.metadata.MetadataPartitionType;
 import org.apache.hudi.table.action.HoodieWriteMetadata;
 import org.apache.hudi.table.action.bootstrap.HoodieBootstrapWriteMetadata;
 import org.apache.hudi.table.action.clean.CleanActionExecutor;
@@ -331,6 +334,16 @@ public class HoodieFlinkCopyOnWriteTable<T extends HoodieRecordPayload>
   }
 
   @Override
+  public Option<HoodieIndexPlan> scheduleIndexing(HoodieEngineContext context, String indexInstantTime, List<MetadataPartitionType> partitionsToIndex) {
+    throw new HoodieNotSupportedException("Metadata indexing is not supported for a Flink table yet.");
+  }
+
+  @Override
+  public Option<HoodieIndexCommitMetadata> index(HoodieEngineContext context, String indexInstantTime) {
+    throw new HoodieNotSupportedException("Metadata indexing is not supported for a Flink table yet.");
+  }
+
+  @Override
   public HoodieSavepointMetadata savepoint(HoodieEngineContext context, String instantToSavepoint, String user, String comment) {
     throw new HoodieNotSupportedException("Savepoint is not supported yet");
   }
diff --git a/hudi-client/hudi-java-client/src/main/java/org/apache/hudi/table/HoodieJavaCopyOnWriteTable.java b/hudi-client/hudi-java-client/src/main/java/org/apache/hudi/table/HoodieJavaCopyOnWriteTable.java
index dd40a0a..8892133 100644
--- a/hudi-client/hudi-java-client/src/main/java/org/apache/hudi/table/HoodieJavaCopyOnWriteTable.java
+++ b/hudi-client/hudi-java-client/src/main/java/org/apache/hudi/table/HoodieJavaCopyOnWriteTable.java
@@ -22,6 +22,8 @@ import org.apache.hudi.avro.model.HoodieCleanMetadata;
 import org.apache.hudi.avro.model.HoodieCleanerPlan;
 import org.apache.hudi.avro.model.HoodieClusteringPlan;
 import org.apache.hudi.avro.model.HoodieCompactionPlan;
+import org.apache.hudi.avro.model.HoodieIndexCommitMetadata;
+import org.apache.hudi.avro.model.HoodieIndexPlan;
 import org.apache.hudi.avro.model.HoodieRestoreMetadata;
 import org.apache.hudi.avro.model.HoodieRestorePlan;
 import org.apache.hudi.avro.model.HoodieRollbackMetadata;
@@ -44,6 +46,7 @@ import org.apache.hudi.exception.HoodieUpsertException;
 import org.apache.hudi.io.HoodieCreateHandle;
 import org.apache.hudi.io.HoodieMergeHandle;
 import org.apache.hudi.io.HoodieSortedMergeHandle;
+import org.apache.hudi.metadata.MetadataPartitionType;
 import org.apache.hudi.table.action.HoodieWriteMetadata;
 import org.apache.hudi.table.action.bootstrap.HoodieBootstrapWriteMetadata;
 import org.apache.hudi.table.action.clean.CleanActionExecutor;
@@ -60,6 +63,8 @@ import org.apache.hudi.table.action.commit.JavaInsertPreppedCommitActionExecutor
 import org.apache.hudi.table.action.commit.JavaMergeHelper;
 import org.apache.hudi.table.action.commit.JavaUpsertCommitActionExecutor;
 import org.apache.hudi.table.action.commit.JavaUpsertPreppedCommitActionExecutor;
+import org.apache.hudi.table.action.index.RunIndexActionExecutor;
+import org.apache.hudi.table.action.index.ScheduleIndexActionExecutor;
 import org.apache.hudi.table.action.restore.CopyOnWriteRestoreActionExecutor;
 import org.apache.hudi.table.action.rollback.BaseRollbackPlanActionExecutor;
 import org.apache.hudi.table.action.rollback.CopyOnWriteRollbackActionExecutor;
@@ -233,6 +238,16 @@ public class HoodieJavaCopyOnWriteTable<T extends HoodieRecordPayload>
   }
 
   @Override
+  public Option<HoodieIndexPlan> scheduleIndexing(HoodieEngineContext context, String indexInstantTime, List<MetadataPartitionType> partitionsToIndex) {
+    return new ScheduleIndexActionExecutor<>(context, config, this, indexInstantTime, partitionsToIndex).execute();
+  }
+
+  @Override
+  public Option<HoodieIndexCommitMetadata> index(HoodieEngineContext context, String indexInstantTime) {
+    return new RunIndexActionExecutor<>(context, config, this, indexInstantTime).execute();
+  }
+
+  @Override
   public HoodieSavepointMetadata savepoint(HoodieEngineContext context,
                                            String instantToSavepoint,
                                            String user,
diff --git a/hudi-client/hudi-spark-client/src/main/java/org/apache/hudi/table/HoodieSparkCopyOnWriteTable.java b/hudi-client/hudi-spark-client/src/main/java/org/apache/hudi/table/HoodieSparkCopyOnWriteTable.java
index 3a46e35..a88ca65 100644
--- a/hudi-client/hudi-spark-client/src/main/java/org/apache/hudi/table/HoodieSparkCopyOnWriteTable.java
+++ b/hudi-client/hudi-spark-client/src/main/java/org/apache/hudi/table/HoodieSparkCopyOnWriteTable.java
@@ -22,6 +22,8 @@ import org.apache.hudi.avro.model.HoodieCleanMetadata;
 import org.apache.hudi.avro.model.HoodieCleanerPlan;
 import org.apache.hudi.avro.model.HoodieClusteringPlan;
 import org.apache.hudi.avro.model.HoodieCompactionPlan;
+import org.apache.hudi.avro.model.HoodieIndexCommitMetadata;
+import org.apache.hudi.avro.model.HoodieIndexPlan;
 import org.apache.hudi.avro.model.HoodieRestoreMetadata;
 import org.apache.hudi.avro.model.HoodieRestorePlan;
 import org.apache.hudi.avro.model.HoodieRollbackMetadata;
@@ -49,6 +51,7 @@ import org.apache.hudi.io.HoodieMergeHandle;
 import org.apache.hudi.io.HoodieSortedMergeHandle;
 import org.apache.hudi.keygen.BaseKeyGenerator;
 import org.apache.hudi.keygen.factory.HoodieSparkKeyGeneratorFactory;
+import org.apache.hudi.metadata.MetadataPartitionType;
 import org.apache.hudi.table.action.HoodieWriteMetadata;
 import org.apache.hudi.table.action.bootstrap.HoodieBootstrapWriteMetadata;
 import org.apache.hudi.table.action.bootstrap.SparkBootstrapCommitActionExecutor;
@@ -67,6 +70,8 @@ import org.apache.hudi.table.action.commit.SparkInsertOverwriteTableCommitAction
 import org.apache.hudi.table.action.commit.SparkInsertPreppedCommitActionExecutor;
 import org.apache.hudi.table.action.commit.SparkUpsertCommitActionExecutor;
 import org.apache.hudi.table.action.commit.SparkUpsertPreppedCommitActionExecutor;
+import org.apache.hudi.table.action.index.RunIndexActionExecutor;
+import org.apache.hudi.table.action.index.ScheduleIndexActionExecutor;
 import org.apache.hudi.table.action.restore.CopyOnWriteRestoreActionExecutor;
 import org.apache.hudi.table.action.rollback.BaseRollbackPlanActionExecutor;
 import org.apache.hudi.table.action.rollback.CopyOnWriteRollbackActionExecutor;
@@ -277,6 +282,16 @@ public class HoodieSparkCopyOnWriteTable<T extends HoodieRecordPayload>
   }
 
   @Override
+  public Option<HoodieIndexPlan> scheduleIndexing(HoodieEngineContext context, String indexInstantTime, List<MetadataPartitionType> partitionsToIndex) {
+    return new ScheduleIndexActionExecutor<>(context, config, this, indexInstantTime, partitionsToIndex).execute();
+  }
+
+  @Override
+  public Option<HoodieIndexCommitMetadata> index(HoodieEngineContext context, String indexInstantTime) {
+    return new RunIndexActionExecutor<>(context, config, this, indexInstantTime).execute();
+  }
+
+  @Override
   public HoodieSavepointMetadata savepoint(HoodieEngineContext context, String instantToSavepoint, String user, String comment) {
     return new SavepointActionExecutor<>(context, config, this, instantToSavepoint, user, comment).execute();
   }
diff --git a/hudi-common/pom.xml b/hudi-common/pom.xml
index a7de212..f605738 100644
--- a/hudi-common/pom.xml
+++ b/hudi-common/pom.xml
@@ -90,6 +90,9 @@
             <import>${basedir}/src/main/avro/HoodieClusteringPlan.avsc</import>
             <import>${basedir}/src/main/avro/HoodieRequestedReplaceMetadata.avsc</import>
             <import>${basedir}/src/main/avro/HoodieMetadata.avsc</import>
+            <import>${basedir}/src/main/avro/HoodieIndexPartitionInfo.avsc</import>
+            <import>${basedir}/src/main/avro/HoodieIndexPlan.avsc</import>
+            <import>${basedir}/src/main/avro/HoodieIndexCommitMetadata.avsc</import>
             <import>${basedir}/src/main/avro/HoodieArchivedMetaEntry.avsc</import>
           </imports>
         </configuration>
diff --git a/hudi-common/src/main/avro/HoodieArchivedMetaEntry.avsc b/hudi-common/src/main/avro/HoodieArchivedMetaEntry.avsc
index c052147..81bcaf7 100644
--- a/hudi-common/src/main/avro/HoodieArchivedMetaEntry.avsc
+++ b/hudi-common/src/main/avro/HoodieArchivedMetaEntry.avsc
@@ -120,6 +120,14 @@
             "HoodieCommitMetadata"
          ],
          "default": null
+      },
+      {
+         "name":"hoodieIndexCommitMetadata",
+         "type":[
+            "null",
+            "HoodieIndexCommitMetadata"
+         ],
+         "default": null
       }
    ]
 }
diff --git a/hudi-common/src/main/avro/HoodieIndexCommitMetadata.avsc b/hudi-common/src/main/avro/HoodieIndexCommitMetadata.avsc
new file mode 100644
index 0000000..098a8c8
--- /dev/null
+++ b/hudi-common/src/main/avro/HoodieIndexCommitMetadata.avsc
@@ -0,0 +1,54 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+{
+  "namespace": "org.apache.hudi.avro.model",
+  "type": "record",
+  "name": "HoodieIndexCommitMetadata",
+  "fields": [
+    {
+      "name": "version",
+      "doc": "This field replaces the field filesToBeDeletedPerPartition",
+      "type": [
+        "int",
+        "null"
+      ],
+      "default": 1
+    },
+    {
+      "name": "operationType",
+      "doc": "This field replaces the field filesToBeDeletedPerPartition",
+      "type": [
+        "null",
+        "string"
+      ],
+      "default": null
+    },
+    {
+      "name": "indexPartitionInfos",
+      "doc": "This field contains the info for each partition that got indexed",
+      "type": [
+        "null",
+        {
+          "type": "array",
+          "items": "HoodieIndexPartitionInfo"
+        }
+      ],
+      "default": null
+    }
+  ]
+}
diff --git a/hudi-common/src/main/avro/HoodieIndexPartitionInfo.avsc b/hudi-common/src/main/avro/HoodieIndexPartitionInfo.avsc
new file mode 100644
index 0000000..52ed1e9
--- /dev/null
+++ b/hudi-common/src/main/avro/HoodieIndexPartitionInfo.avsc
@@ -0,0 +1,48 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+{
+  "namespace": "org.apache.hudi.avro.model",
+  "type": "record",
+  "name": "HoodieIndexPartitionInfo",
+  "fields": [
+    {
+      "name": "version",
+      "type": [
+        "int",
+        "null"
+      ],
+      "default": 1
+    },
+    {
+      "name": "metadataPartitionPath",
+      "type": [
+        "null",
+        "string"
+      ],
+      "default": null
+    },
+    {
+      "name": "indexUptoInstant",
+      "type": [
+        "null",
+        "string"
+      ],
+      "default": null
+    }
+  ]
+}
diff --git a/hudi-common/src/main/avro/HoodieIndexPlan.avsc b/hudi-common/src/main/avro/HoodieIndexPlan.avsc
new file mode 100644
index 0000000..9fb7ec3
--- /dev/null
+++ b/hudi-common/src/main/avro/HoodieIndexPlan.avsc
@@ -0,0 +1,43 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+{
+  "namespace": "org.apache.hudi.avro.model",
+  "type": "record",
+  "name": "HoodieIndexPlan",
+  "fields": [
+    {
+      "name": "version",
+      "type": [
+        "int",
+        "null"
+      ],
+      "default": 1
+    },
+    {
+      "name": "indexPartitionInfos",
+      "type": [
+        "null",
+        {
+          "type": "array",
+          "items": "HoodieIndexPartitionInfo"
+        }
+      ],
+      "default": null
+    }
+  ]
+}
diff --git a/hudi-common/src/main/java/org/apache/hudi/common/bloom/SimpleBloomFilter.java b/hudi-common/src/main/java/org/apache/hudi/common/bloom/SimpleBloomFilter.java
index b027831..2403ffd 100644
--- a/hudi-common/src/main/java/org/apache/hudi/common/bloom/SimpleBloomFilter.java
+++ b/hudi-common/src/main/java/org/apache/hudi/common/bloom/SimpleBloomFilter.java
@@ -78,7 +78,7 @@ public class SimpleBloomFilter implements BloomFilter {
   @Override
   public void add(String key) {
     if (key == null) {
-      throw new NullPointerException("Key cannot by null");
+      throw new NullPointerException("Key cannot be null");
     }
     filter.add(new Key(key.getBytes(StandardCharsets.UTF_8)));
   }
@@ -86,7 +86,7 @@ public class SimpleBloomFilter implements BloomFilter {
   @Override
   public boolean mightContain(String key) {
     if (key == null) {
-      throw new NullPointerException("Key cannot by null");
+      throw new NullPointerException("Key cannot be null");
     }
     return filter.membershipTest(new Key(key.getBytes(StandardCharsets.UTF_8)));
   }
diff --git a/hudi-common/src/main/java/org/apache/hudi/common/config/HoodieMetadataConfig.java b/hudi-common/src/main/java/org/apache/hudi/common/config/HoodieMetadataConfig.java
index 7d964f3..9dbdf6d 100644
--- a/hudi-common/src/main/java/org/apache/hudi/common/config/HoodieMetadataConfig.java
+++ b/hudi-common/src/main/java/org/apache/hudi/common/config/HoodieMetadataConfig.java
@@ -71,6 +71,13 @@ public final class HoodieMetadataConfig extends HoodieConfig {
       .sinceVersion("0.7.0")
       .withDocumentation("Enable asynchronous cleaning for metadata table");
 
+  // Async index
+  public static final ConfigProperty<Boolean> ASYNC_INDEX_ENABLE = ConfigProperty
+      .key(METADATA_PREFIX + ".index.async")
+      .defaultValue(false)
+      .sinceVersion("0.11.0")
+      .withDocumentation("Enable asynchronous indexing of metadata table.");
+
   // Maximum delta commits before compaction occurs
   public static final ConfigProperty<Integer> COMPACT_NUM_DELTA_COMMITS = ConfigProperty
       .key(METADATA_PREFIX + ".compact.max.delta.commits")
@@ -175,6 +182,25 @@ public final class HoodieMetadataConfig extends HoodieConfig {
           .sinceVersion("0.11.0")
           .withDocumentation("Parallelism to use, when generating column stats index.");
 
+  public static final ConfigProperty<String> COLUMN_STATS_INDEX_FOR_COLUMNS = ConfigProperty
+      .key(METADATA_PREFIX + ".index.column.stats.column.list")
+      .noDefaultValue()
+      .sinceVersion("0.11.0")
+      .withDocumentation("Comma-separated list of columns for which column stats index will be built. If not set, all columns will be indexed");
+
+  public static final ConfigProperty<String> BLOOM_FILTER_INDEX_FOR_COLUMNS = ConfigProperty
+      .key(METADATA_PREFIX + ".index.bloom.filter.column.list")
+      .noDefaultValue()
+      .sinceVersion("0.11.0")
+      .withDocumentation("Comma-separated list of columns for which bloom filter index will be built. If not set, only record key will be indexed.");
+
+  public static final ConfigProperty<Integer> METADATA_INDEX_CHECK_TIMEOUT_SECONDS = ConfigProperty
+      .key(METADATA_PREFIX + ".index.check.timeout.seconds")
+      .defaultValue(900)
+      .sinceVersion("0.11.0")
+      .withDocumentation("After the async indexer has finished indexing upto the base instant, it will ensure that all inflight writers "
+          + "reliably write index updates as well. If this timeout expires, then the indexer will abort itself safely.");
+
   public static final ConfigProperty<Boolean> POPULATE_META_FIELDS = ConfigProperty
       .key(METADATA_PREFIX + ".populate.meta.fields")
       .defaultValue(false)
@@ -221,6 +247,14 @@ public final class HoodieMetadataConfig extends HoodieConfig {
     return getBooleanOrDefault(ENABLE_METADATA_INDEX_COLUMN_STATS_FOR_ALL_COLUMNS);
   }
 
+  public String getColumnsEnabledForColumnStatsIndex() {
+    return getString(COLUMN_STATS_INDEX_FOR_COLUMNS);
+  }
+
+  public String getColumnsEnabledForBloomFilterIndex() {
+    return getString(BLOOM_FILTER_INDEX_FOR_COLUMNS);
+  }
+
   public int getBloomFilterIndexFileGroupCount() {
     return getIntOrDefault(METADATA_INDEX_BLOOM_FILTER_FILE_GROUP_COUNT);
   }
@@ -233,6 +267,10 @@ public final class HoodieMetadataConfig extends HoodieConfig {
     return getIntOrDefault(COLUMN_STATS_INDEX_PARALLELISM);
   }
 
+  public int getIndexingCheckTimeoutSeconds() {
+    return getIntOrDefault(METADATA_INDEX_CHECK_TIMEOUT_SECONDS);
+  }
+
   public boolean enableMetrics() {
     return getBoolean(METRICS_ENABLE);
   }
@@ -305,6 +343,21 @@ public final class HoodieMetadataConfig extends HoodieConfig {
       return this;
     }
 
+    public Builder withColumnStatsIndexForColumns(String columns) {
+      metadataConfig.setValue(COLUMN_STATS_INDEX_FOR_COLUMNS, columns);
+      return this;
+    }
+
+    public Builder withBloomFilterIndexForColumns(String columns) {
+      metadataConfig.setValue(BLOOM_FILTER_INDEX_FOR_COLUMNS, columns);
+      return this;
+    }
+
+    public Builder withIndexingCheckTimeout(int timeoutInSeconds) {
+      metadataConfig.setValue(METADATA_INDEX_CHECK_TIMEOUT_SECONDS, String.valueOf(timeoutInSeconds));
+      return this;
+    }
+
     public Builder enableMetrics(boolean enableMetrics) {
       metadataConfig.setValue(METRICS_ENABLE, String.valueOf(enableMetrics));
       return this;
@@ -320,6 +373,11 @@ public final class HoodieMetadataConfig extends HoodieConfig {
       return this;
     }
 
+    public Builder withAsyncIndex(boolean asyncIndex) {
+      metadataConfig.setValue(ASYNC_INDEX_ENABLE, String.valueOf(asyncIndex));
+      return this;
+    }
+
     public Builder withMaxNumDeltaCommitsBeforeCompaction(int maxNumDeltaCommitsBeforeCompaction) {
       metadataConfig.setValue(COMPACT_NUM_DELTA_COMMITS, String.valueOf(maxNumDeltaCommitsBeforeCompaction));
       return this;
diff --git a/hudi-common/src/main/java/org/apache/hudi/common/model/WriteOperationType.java b/hudi-common/src/main/java/org/apache/hudi/common/model/WriteOperationType.java
index b5a3cc0..a756405 100644
--- a/hudi-common/src/main/java/org/apache/hudi/common/model/WriteOperationType.java
+++ b/hudi-common/src/main/java/org/apache/hudi/common/model/WriteOperationType.java
@@ -48,6 +48,8 @@ public enum WriteOperationType {
   INSERT_OVERWRITE_TABLE("insert_overwrite_table"),
   // compact
   COMPACT("compact"),
+
+  INDEX("index"),
   // used for old version
   UNKNOWN("unknown");
 
@@ -86,6 +88,8 @@ public enum WriteOperationType {
         return CLUSTER;
       case "compact":
         return COMPACT;
+      case "index":
+        return INDEX;
       case "unknown":
         return UNKNOWN;
       default:
diff --git a/hudi-common/src/main/java/org/apache/hudi/common/table/HoodieTableConfig.java b/hudi-common/src/main/java/org/apache/hudi/common/table/HoodieTableConfig.java
index 6b8103d..923ee27 100644
--- a/hudi-common/src/main/java/org/apache/hudi/common/table/HoodieTableConfig.java
+++ b/hudi-common/src/main/java/org/apache/hudi/common/table/HoodieTableConfig.java
@@ -36,6 +36,7 @@ import org.apache.hudi.common.table.timeline.versioning.TimelineLayoutVersion;
 import org.apache.hudi.common.util.BinaryUtil;
 import org.apache.hudi.common.util.FileIOUtils;
 import org.apache.hudi.common.util.Option;
+import org.apache.hudi.common.util.StringUtils;
 import org.apache.hudi.common.util.ValidationUtils;
 import org.apache.hudi.exception.HoodieIOException;
 import org.apache.hudi.keygen.constant.KeyGeneratorOptions;
@@ -208,6 +209,20 @@ public class HoodieTableConfig extends HoodieConfig {
       .sinceVersion("0.11.0")
       .withDocumentation("Table checksum is used to guard against partial writes in HDFS. It is added as the last entry in hoodie.properties and then used to validate while reading table config.");
 
+  public static final ConfigProperty<String> TABLE_METADATA_PARTITIONS_INFLIGHT = ConfigProperty
+      .key("hoodie.table.metadata.partitions.inflight")
+      .noDefaultValue()
+      .sinceVersion("0.11.0")
+      .withDocumentation("Comma-separated list of metadata partitions whose building is in progress. "
+          + "These partitions are not yet ready for use by the readers.");
+
+  public static final ConfigProperty<String> TABLE_METADATA_PARTITIONS = ConfigProperty
+      .key("hoodie.table.metadata.partitions")
+      .noDefaultValue()
+      .sinceVersion("0.11.0")
+      .withDocumentation("Comma-separated list of metadata partitions that have been completely built and in-sync with data table. "
+          + "These partitions are ready for use by the readers");
+
   private static final String TABLE_CHECKSUM_FORMAT = "%s.%s"; // <database_name>.<table_name>
 
   public HoodieTableConfig(FileSystem fs, String metaPath, String payloadClassName) {
@@ -585,6 +600,14 @@ public class HoodieTableConfig extends HoodieConfig {
     return getLong(TABLE_CHECKSUM);
   }
 
+  public String getMetadataPartitionsInflight() {
+    return getStringOrDefault(TABLE_METADATA_PARTITIONS_INFLIGHT, StringUtils.EMPTY_STRING);
+  }
+
+  public String getMetadataPartitions() {
+    return getStringOrDefault(TABLE_METADATA_PARTITIONS, StringUtils.EMPTY_STRING);
+  }
+
   public Map<String, String> propsMap() {
     return props.entrySet().stream()
         .collect(Collectors.toMap(e -> String.valueOf(e.getKey()), e -> String.valueOf(e.getValue())));
diff --git a/hudi-common/src/main/java/org/apache/hudi/common/table/timeline/HoodieActiveTimeline.java b/hudi-common/src/main/java/org/apache/hudi/common/table/timeline/HoodieActiveTimeline.java
index f7dc2f6..ac28a75 100644
--- a/hudi-common/src/main/java/org/apache/hudi/common/table/timeline/HoodieActiveTimeline.java
+++ b/hudi-common/src/main/java/org/apache/hudi/common/table/timeline/HoodieActiveTimeline.java
@@ -73,7 +73,8 @@ public class HoodieActiveTimeline extends HoodieDefaultTimeline {
       INFLIGHT_COMPACTION_EXTENSION, REQUESTED_COMPACTION_EXTENSION,
       REQUESTED_RESTORE_EXTENSION, INFLIGHT_RESTORE_EXTENSION, RESTORE_EXTENSION,
       ROLLBACK_EXTENSION, REQUESTED_ROLLBACK_EXTENSION, INFLIGHT_ROLLBACK_EXTENSION,
-      REQUESTED_REPLACE_COMMIT_EXTENSION, INFLIGHT_REPLACE_COMMIT_EXTENSION, REPLACE_COMMIT_EXTENSION));
+      REQUESTED_REPLACE_COMMIT_EXTENSION, INFLIGHT_REPLACE_COMMIT_EXTENSION, REPLACE_COMMIT_EXTENSION,
+      REQUESTED_INDEX_COMMIT_EXTENSION, INFLIGHT_INDEX_COMMIT_EXTENSION, INDEX_COMMIT_EXTENSION));
   private static final Logger LOG = LogManager.getLogger(HoodieActiveTimeline.class);
   protected HoodieTableMetaClient metaClient;
 
@@ -99,7 +100,6 @@ public class HoodieActiveTimeline extends HoodieDefaultTimeline {
     return HoodieInstantTimeGenerator.createNewInstantTime(0);
   }
 
-
   /**
    * Returns next instant time that adds N milliseconds to current time.
    * Ensures each instant time is atleast 1 second apart since we create instant times at second granularity
@@ -225,7 +225,7 @@ public class HoodieActiveTimeline extends HoodieDefaultTimeline {
     deleteInstantFile(instant);
   }
 
-  private void deleteInstantFileIfExists(HoodieInstant instant) {
+  public void deleteInstantFileIfExists(HoodieInstant instant) {
     LOG.info("Deleting instant " + instant);
     Path inFlightCommitFilePath = new Path(metaClient.getMetaPath(), instant.getFileName());
     try {
@@ -339,6 +339,10 @@ public class HoodieActiveTimeline extends HoodieDefaultTimeline {
     }
   }
 
+  public Option<byte[]> readIndexPlanAsBytes(HoodieInstant instant) {
+    return readDataFromPath(new Path(metaClient.getMetaPath(), instant.getFileName()));
+  }
+
   /**
    * Revert compaction State from inflight to requested.
    *
@@ -652,6 +656,65 @@ public class HoodieActiveTimeline extends HoodieDefaultTimeline {
     createFileInMetaPath(instant.getFileName(), content, false);
   }
 
+  /**
+   * Transition index instant state from requested to inflight.
+   *
+   * @param requestedInstant Inflight Instant
+   * @return inflight instant
+   */
+  public HoodieInstant transitionIndexRequestedToInflight(HoodieInstant requestedInstant, Option<byte[]> data) {
+    ValidationUtils.checkArgument(requestedInstant.getAction().equals(HoodieTimeline.INDEXING_ACTION),
+        String.format("%s is not equal to %s action", requestedInstant.getAction(), INDEXING_ACTION));
+    ValidationUtils.checkArgument(requestedInstant.isRequested(),
+        String.format("Instant %s not in requested state", requestedInstant.getTimestamp()));
+    HoodieInstant inflightInstant = new HoodieInstant(State.INFLIGHT, INDEXING_ACTION, requestedInstant.getTimestamp());
+    transitionState(requestedInstant, inflightInstant, data);
+    return inflightInstant;
+  }
+
+  /**
+   * Transition index instant state from inflight to completed.
+   * @param inflightInstant Inflight Instant
+   * @return completed instant
+   */
+  public HoodieInstant transitionIndexInflightToComplete(HoodieInstant inflightInstant, Option<byte[]> data) {
+    ValidationUtils.checkArgument(inflightInstant.getAction().equals(HoodieTimeline.INDEXING_ACTION),
+        String.format("%s is not equal to %s action", inflightInstant.getAction(), INDEXING_ACTION));
+    ValidationUtils.checkArgument(inflightInstant.isInflight(),
+        String.format("Instant %s not inflight", inflightInstant.getTimestamp()));
+    HoodieInstant commitInstant = new HoodieInstant(State.COMPLETED, INDEXING_ACTION, inflightInstant.getTimestamp());
+    transitionState(inflightInstant, commitInstant, data);
+    return commitInstant;
+  }
+
+  /**
+   * Revert index instant state from inflight to requested.
+   * @param inflightInstant Inflight Instant
+   * @return requested instant
+   */
+  public HoodieInstant revertIndexInflightToRequested(HoodieInstant inflightInstant) {
+    ValidationUtils.checkArgument(inflightInstant.getAction().equals(HoodieTimeline.INDEXING_ACTION),
+        String.format("%s is not equal to %s action", inflightInstant.getAction(), INDEXING_ACTION));
+    ValidationUtils.checkArgument(inflightInstant.isInflight(),
+        String.format("Instant %s not inflight", inflightInstant.getTimestamp()));
+    HoodieInstant requestedInstant = new HoodieInstant(State.REQUESTED, INDEXING_ACTION, inflightInstant.getTimestamp());
+    if (metaClient.getTimelineLayoutVersion().isNullVersion()) {
+      transitionState(inflightInstant, requestedInstant, Option.empty());
+    } else {
+      deleteInflight(inflightInstant);
+    }
+    return requestedInstant;
+  }
+
+  /**
+   * Save content for inflight/requested index instant.
+   */
+  public void saveToPendingIndexAction(HoodieInstant instant, Option<byte[]> content) {
+    ValidationUtils.checkArgument(instant.getAction().equals(HoodieTimeline.INDEXING_ACTION),
+        String.format("%s is not equal to %s action", instant.getAction(), INDEXING_ACTION));
+    createFileInMetaPath(instant.getFileName(), content, false);
+  }
+
   private void createFileInMetaPath(String filename, Option<byte[]> content, boolean allowOverwrite) {
     Path fullPath = new Path(metaClient.getMetaPath(), filename);
     if (allowOverwrite || metaClient.getTimelineLayoutVersion().isNullVersion()) {
diff --git a/hudi-common/src/main/java/org/apache/hudi/common/table/timeline/HoodieArchivedTimeline.java b/hudi-common/src/main/java/org/apache/hudi/common/table/timeline/HoodieArchivedTimeline.java
index a966fee..21c7c4d 100644
--- a/hudi-common/src/main/java/org/apache/hudi/common/table/timeline/HoodieArchivedTimeline.java
+++ b/hudi-common/src/main/java/org/apache/hudi/common/table/timeline/HoodieArchivedTimeline.java
@@ -118,7 +118,8 @@ public class HoodieArchivedTimeline extends HoodieDefaultTimeline {
    *
    * @deprecated
    */
-  public HoodieArchivedTimeline() {}
+  public HoodieArchivedTimeline() {
+  }
 
   /**
    * This method is only used when this object is deserialized in a spark executor.
@@ -207,6 +208,8 @@ public class HoodieArchivedTimeline extends HoodieDefaultTimeline {
         return Option.of("hoodieCompactionPlan");
       case HoodieTimeline.REPLACE_COMMIT_ACTION:
         return Option.of("hoodieReplaceCommitMetadata");
+      case HoodieTimeline.INDEXING_ACTION:
+        return Option.of("hoodieIndexCommitMetadata");
       default:
         LOG.error(String.format("Unknown action in metadata (%s)", action));
         return Option.empty();
diff --git a/hudi-common/src/main/java/org/apache/hudi/common/table/timeline/HoodieDefaultTimeline.java b/hudi-common/src/main/java/org/apache/hudi/common/table/timeline/HoodieDefaultTimeline.java
index 2cf111e..ac1dd00 100644
--- a/hudi-common/src/main/java/org/apache/hudi/common/table/timeline/HoodieDefaultTimeline.java
+++ b/hudi-common/src/main/java/org/apache/hudi/common/table/timeline/HoodieDefaultTimeline.java
@@ -75,7 +75,8 @@ public class HoodieDefaultTimeline implements HoodieTimeline {
    *
    * @deprecated
    */
-  public HoodieDefaultTimeline() {}
+  public HoodieDefaultTimeline() {
+  }
 
   @Override
   public HoodieTimeline filterInflights() {
@@ -113,6 +114,16 @@ public class HoodieDefaultTimeline implements HoodieTimeline {
   }
 
   @Override
+  public HoodieTimeline getContiguousCompletedWriteTimeline() {
+    Option<HoodieInstant> earliestPending = getWriteTimeline().filterInflightsAndRequested().firstInstant();
+    if (earliestPending.isPresent()) {
+      return getWriteTimeline().filterCompletedInstants()
+          .filter(instant -> HoodieTimeline.compareTimestamps(instant.getTimestamp(), LESSER_THAN, earliestPending.get().getTimestamp()));
+    }
+    return getWriteTimeline().filterCompletedInstants();
+  }
+
+  @Override
   public HoodieTimeline getCompletedReplaceTimeline() {
     return new HoodieDefaultTimeline(
         instants.stream().filter(s -> s.getAction().equals(REPLACE_COMMIT_ACTION)).filter(HoodieInstant::isCompleted), details);
@@ -181,6 +192,16 @@ public class HoodieDefaultTimeline implements HoodieTimeline {
     return new HoodieDefaultTimeline(instants.stream().filter(filter), details);
   }
 
+  @Override
+  public HoodieTimeline filterPendingIndexTimeline() {
+    return new HoodieDefaultTimeline(instants.stream().filter(s -> s.getAction().equals(INDEXING_ACTION) && !s.isCompleted()), details);
+  }
+
+  @Override
+  public HoodieTimeline filterCompletedIndexTimeline() {
+    return new HoodieDefaultTimeline(instants.stream().filter(s -> s.getAction().equals(INDEXING_ACTION) && s.isCompleted()), details);
+  }
+
   /**
    * Get all instants (commits, delta commits) that produce new data, in the active timeline.
    */
@@ -189,12 +210,12 @@ public class HoodieDefaultTimeline implements HoodieTimeline {
   }
 
   /**
-   * Get all instants (commits, delta commits, compaction, clean, savepoint, rollback) that result in actions,
+   * Get all instants (commits, delta commits, compaction, clean, savepoint, rollback, replace commits, index) that result in actions,
    * in the active timeline.
    */
   public HoodieTimeline getAllCommitsTimeline() {
     return getTimelineOfActions(CollectionUtils.createSet(COMMIT_ACTION, DELTA_COMMIT_ACTION,
-            CLEAN_ACTION, COMPACTION_ACTION, SAVEPOINT_ACTION, ROLLBACK_ACTION, REPLACE_COMMIT_ACTION));
+            CLEAN_ACTION, COMPACTION_ACTION, SAVEPOINT_ACTION, ROLLBACK_ACTION, REPLACE_COMMIT_ACTION, INDEXING_ACTION));
   }
 
   /**
diff --git a/hudi-common/src/main/java/org/apache/hudi/common/table/timeline/HoodieInstant.java b/hudi-common/src/main/java/org/apache/hudi/common/table/timeline/HoodieInstant.java
index 9cd0883..52de898 100644
--- a/hudi-common/src/main/java/org/apache/hudi/common/table/timeline/HoodieInstant.java
+++ b/hudi-common/src/main/java/org/apache/hudi/common/table/timeline/HoodieInstant.java
@@ -172,6 +172,10 @@ public class HoodieInstant implements Serializable, Comparable<HoodieInstant> {
       return isInflight() ? HoodieTimeline.makeInflightReplaceFileName(timestamp)
           : isRequested() ? HoodieTimeline.makeRequestedReplaceFileName(timestamp)
           : HoodieTimeline.makeReplaceFileName(timestamp);
+    } else if (HoodieTimeline.INDEXING_ACTION.equals(action)) {
+      return isInflight() ? HoodieTimeline.makeInflightIndexFileName(timestamp)
+          : isRequested() ? HoodieTimeline.makeRequestedIndexFileName(timestamp)
+          : HoodieTimeline.makeIndexCommitFileName(timestamp);
     }
     throw new IllegalArgumentException("Cannot get file name for unknown action " + action);
   }
diff --git a/hudi-common/src/main/java/org/apache/hudi/common/table/timeline/HoodieTimeline.java b/hudi-common/src/main/java/org/apache/hudi/common/table/timeline/HoodieTimeline.java
index 25b9c2e..666cc7d 100644
--- a/hudi-common/src/main/java/org/apache/hudi/common/table/timeline/HoodieTimeline.java
+++ b/hudi-common/src/main/java/org/apache/hudi/common/table/timeline/HoodieTimeline.java
@@ -55,10 +55,11 @@ public interface HoodieTimeline extends Serializable {
   String COMPACTION_ACTION = "compaction";
   String REQUESTED_EXTENSION = ".requested";
   String RESTORE_ACTION = "restore";
+  String INDEXING_ACTION = "indexing";
 
   String[] VALID_ACTIONS_IN_TIMELINE = {COMMIT_ACTION, DELTA_COMMIT_ACTION,
       CLEAN_ACTION, SAVEPOINT_ACTION, RESTORE_ACTION, ROLLBACK_ACTION,
-      COMPACTION_ACTION, REPLACE_COMMIT_ACTION};
+      COMPACTION_ACTION, REPLACE_COMMIT_ACTION, INDEXING_ACTION};
 
   String COMMIT_EXTENSION = "." + COMMIT_ACTION;
   String DELTA_COMMIT_EXTENSION = "." + DELTA_COMMIT_ACTION;
@@ -84,6 +85,9 @@ public interface HoodieTimeline extends Serializable {
   String INFLIGHT_REPLACE_COMMIT_EXTENSION = "." + REPLACE_COMMIT_ACTION + INFLIGHT_EXTENSION;
   String REQUESTED_REPLACE_COMMIT_EXTENSION = "." + REPLACE_COMMIT_ACTION + REQUESTED_EXTENSION;
   String REPLACE_COMMIT_EXTENSION = "." + REPLACE_COMMIT_ACTION;
+  String INFLIGHT_INDEX_COMMIT_EXTENSION = "." + INDEXING_ACTION + INFLIGHT_EXTENSION;
+  String REQUESTED_INDEX_COMMIT_EXTENSION = "." + INDEXING_ACTION + REQUESTED_EXTENSION;
+  String INDEX_COMMIT_EXTENSION = "." + INDEXING_ACTION;
 
   String INVALID_INSTANT_TS = "0";
 
@@ -140,6 +144,15 @@ public interface HoodieTimeline extends Serializable {
   HoodieTimeline getWriteTimeline();
 
   /**
+   * Timeline to just include commits (commit/deltacommit), compaction and replace actions that are completed and contiguous.
+   * For example, if timeline is [C0.completed, C1.completed, C2.completed, C3.inflight, C4.completed].
+   * Then, a timeline of [C0.completed, C1.completed, C2.completed] will be returned.
+   *
+   * @return
+   */
+  HoodieTimeline getContiguousCompletedWriteTimeline();
+
+  /**
    * Timeline to just include replace instants that have valid (commit/deltacommit) actions.
    *
    * @return
@@ -199,6 +212,16 @@ public interface HoodieTimeline extends Serializable {
   HoodieTimeline filter(Predicate<HoodieInstant> filter);
 
   /**
+   * Filter this timeline to just include requested and inflight index instants.
+   */
+  HoodieTimeline filterPendingIndexTimeline();
+
+  /**
+   * Filter this timeline to just include completed index instants.
+   */
+  HoodieTimeline filterCompletedIndexTimeline();
+
+  /**
    * If the timeline has any instants.
    *
    * @return true if timeline is empty
@@ -341,6 +364,14 @@ public interface HoodieTimeline extends Serializable {
     return instant.isRequested() ? instant : HoodieTimeline.getRequestedInstant(instant);
   }
 
+  static HoodieInstant getIndexRequestedInstant(final String timestamp) {
+    return new HoodieInstant(State.REQUESTED, INDEXING_ACTION, timestamp);
+  }
+
+  static HoodieInstant getIndexInflightInstant(final String timestamp) {
+    return new HoodieInstant(State.INFLIGHT, INDEXING_ACTION, timestamp);
+  }
+
   /**
    * Returns the inflight instant corresponding to the instant being passed. Takes care of changes in action names
    * between inflight and completed instants (compaction <=> commit).
@@ -454,4 +485,16 @@ public interface HoodieTimeline extends Serializable {
   static String makeFileNameAsInflight(String fileName) {
     return StringUtils.join(fileName, HoodieTimeline.INFLIGHT_EXTENSION);
   }
+
+  static String makeIndexCommitFileName(String instant) {
+    return StringUtils.join(instant, HoodieTimeline.INDEX_COMMIT_EXTENSION);
+  }
+
+  static String makeInflightIndexFileName(String instant) {
+    return StringUtils.join(instant, HoodieTimeline.INFLIGHT_INDEX_COMMIT_EXTENSION);
+  }
+
+  static String makeRequestedIndexFileName(String instant) {
+    return StringUtils.join(instant, HoodieTimeline.REQUESTED_INDEX_COMMIT_EXTENSION);
+  }
 }
diff --git a/hudi-common/src/main/java/org/apache/hudi/common/table/timeline/TimelineMetadataUtils.java b/hudi-common/src/main/java/org/apache/hudi/common/table/timeline/TimelineMetadataUtils.java
index 70a23f1..b50846b 100644
--- a/hudi-common/src/main/java/org/apache/hudi/common/table/timeline/TimelineMetadataUtils.java
+++ b/hudi-common/src/main/java/org/apache/hudi/common/table/timeline/TimelineMetadataUtils.java
@@ -22,6 +22,8 @@ import org.apache.hudi.avro.HoodieAvroUtils;
 import org.apache.hudi.avro.model.HoodieCleanMetadata;
 import org.apache.hudi.avro.model.HoodieCleanerPlan;
 import org.apache.hudi.avro.model.HoodieCompactionPlan;
+import org.apache.hudi.avro.model.HoodieIndexCommitMetadata;
+import org.apache.hudi.avro.model.HoodieIndexPlan;
 import org.apache.hudi.avro.model.HoodieInstantInfo;
 import org.apache.hudi.avro.model.HoodieReplaceCommitMetadata;
 import org.apache.hudi.avro.model.HoodieRequestedReplaceMetadata;
@@ -137,6 +139,14 @@ public class TimelineMetadataUtils {
     return serializeAvroMetadata(clusteringPlan, HoodieRequestedReplaceMetadata.class);
   }
 
+  public static Option<byte[]> serializeIndexPlan(HoodieIndexPlan indexPlan) throws IOException {
+    return serializeAvroMetadata(indexPlan, HoodieIndexPlan.class);
+  }
+
+  public static Option<byte[]> serializeIndexCommitMetadata(HoodieIndexCommitMetadata indexCommitMetadata) throws IOException {
+    return serializeAvroMetadata(indexCommitMetadata, HoodieIndexCommitMetadata.class);
+  }
+
   public static <T extends SpecificRecordBase> Option<byte[]> serializeAvroMetadata(T metadata, Class<T> clazz)
       throws IOException {
     DatumWriter<T> datumWriter = new SpecificDatumWriter<>(clazz);
@@ -180,6 +190,14 @@ public class TimelineMetadataUtils {
     return deserializeAvroMetadata(bytes, HoodieReplaceCommitMetadata.class);
   }
 
+  public static HoodieIndexPlan deserializeIndexPlan(byte[] bytes) throws IOException {
+    return deserializeAvroMetadata(bytes, HoodieIndexPlan.class);
+  }
+
+  public static HoodieIndexCommitMetadata deserializeIndexCommitMetadata(byte[] bytes) throws IOException {
+    return deserializeAvroMetadata(bytes, HoodieIndexCommitMetadata.class);
+  }
+
   public static <T extends SpecificRecordBase> T deserializeAvroMetadata(byte[] bytes, Class<T> clazz)
       throws IOException {
     DatumReader<T> reader = new SpecificDatumReader<>(clazz);
diff --git a/hudi-common/src/main/java/org/apache/hudi/common/table/view/HoodieTableFileSystemView.java b/hudi-common/src/main/java/org/apache/hudi/common/table/view/HoodieTableFileSystemView.java
index 299dbab..9dac360 100644
--- a/hudi-common/src/main/java/org/apache/hudi/common/table/view/HoodieTableFileSystemView.java
+++ b/hudi-common/src/main/java/org/apache/hudi/common/table/view/HoodieTableFileSystemView.java
@@ -18,9 +18,9 @@
 
 package org.apache.hudi.common.table.view;
 
-import org.apache.hadoop.fs.FileStatus;
 import org.apache.hudi.common.model.BootstrapBaseFileMapping;
 import org.apache.hudi.common.model.CompactionOperation;
+import org.apache.hudi.common.model.FileSlice;
 import org.apache.hudi.common.model.HoodieFileGroup;
 import org.apache.hudi.common.model.HoodieFileGroupId;
 import org.apache.hudi.common.table.HoodieTableMetaClient;
@@ -29,6 +29,8 @@ import org.apache.hudi.common.table.timeline.HoodieTimeline;
 import org.apache.hudi.common.util.Option;
 import org.apache.hudi.common.util.ValidationUtils;
 import org.apache.hudi.common.util.collection.Pair;
+
+import org.apache.hadoop.fs.FileStatus;
 import org.apache.log4j.LogManager;
 import org.apache.log4j.Logger;
 
@@ -358,6 +360,19 @@ public class HoodieTableFileSystemView extends IncrementalTimelineSyncFileSystem
     return Option.ofNullable(fgIdToReplaceInstants.get(fileGroupId));
   }
 
+  /**
+   * Get the latest file slices for a given partition including the inflight ones.
+   *
+   * @param partitionPath
+   * @return Stream of latest {@link FileSlice} in the partition path.
+   */
+  public Stream<FileSlice> fetchLatestFileSlicesIncludingInflight(String partitionPath) {
+    return fetchAllStoredFileGroups(partitionPath)
+        .map(HoodieFileGroup::getLatestFileSlicesIncludingInflight)
+        .filter(Option::isPresent)
+        .map(Option::get);
+  }
+
   @Override
   public void close() {
     super.close();
diff --git a/hudi-common/src/main/java/org/apache/hudi/common/util/StringUtils.java b/hudi-common/src/main/java/org/apache/hudi/common/util/StringUtils.java
index 326bf05..4a092aa 100644
--- a/hudi-common/src/main/java/org/apache/hudi/common/util/StringUtils.java
+++ b/hudi-common/src/main/java/org/apache/hudi/common/util/StringUtils.java
@@ -20,12 +20,24 @@ package org.apache.hudi.common.util;
 
 import javax.annotation.Nullable;
 
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+import java.util.function.Function;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
 /**
  * Simple utility for operations on strings.
  */
 public class StringUtils {
 
   public static final String EMPTY_STRING = "";
+  private static final Function<String, Set<String>> STRING_TO_SET = (str) -> Stream.of(str.split(","))
+      .map(String::trim).filter(s -> !s.isEmpty()).collect(Collectors.toSet());
+  private static final Function<String, List<String>> STRING_TO_LIST = (str) -> Stream.of(str.split(","))
+      .map(String::trim).filter(s -> !s.isEmpty()).collect(Collectors.toList());
 
   /**
    * <p>
@@ -46,7 +58,7 @@ public class StringUtils {
    * </pre>
    */
   public static <T> String join(final String... elements) {
-    return join(elements, "");
+    return join(elements, EMPTY_STRING);
   }
 
   public static <T> String joinUsingDelim(String delim, final String... elements) {
@@ -100,4 +112,24 @@ public class StringUtils {
   private static boolean stringIsNullOrEmpty(@Nullable String string) {
     return string == null || string.isEmpty();
   }
+
+  /**
+   * Converts the input string, delimited by comma, to a set of strings.
+   *
+   * @param input
+   * @return
+   */
+  public static Set<String> toSet(@Nullable String input) {
+    return isNullOrEmpty(input) ? new HashSet<>() : STRING_TO_SET.apply(input);
+  }
+
+  /**
+   * Converts the input string, delimited by comma, to a list of strings.
+   *
+   * @param input
+   * @return
+   */
+  public static List<String> toList(@Nullable String input) {
+    return isNullOrEmpty(input) ? new ArrayList<>() : STRING_TO_LIST.apply(input);
+  }
 }
diff --git a/hudi-common/src/main/java/org/apache/hudi/metadata/BaseTableMetadata.java b/hudi-common/src/main/java/org/apache/hudi/metadata/BaseTableMetadata.java
index 2dce66e..73b5dcb 100644
--- a/hudi-common/src/main/java/org/apache/hudi/metadata/BaseTableMetadata.java
+++ b/hudi-common/src/main/java/org/apache/hudi/metadata/BaseTableMetadata.java
@@ -284,7 +284,7 @@ public abstract class BaseTableMetadata implements HoodieTableMetadata {
 
     List<String> partitions = Collections.emptyList();
     if (hoodieRecord.isPresent()) {
-      mayBeHandleSpuriousDeletes(hoodieRecord, "\"all partitions\"");
+      handleSpuriousDeletes(hoodieRecord, "\"all partitions\"");
       partitions = hoodieRecord.get().getData().getFilenames();
       // Partition-less tables have a single empty partition
       if (partitions.contains(NON_PARTITIONED_NAME)) {
@@ -315,7 +315,7 @@ public abstract class BaseTableMetadata implements HoodieTableMetadata {
 
     FileStatus[] statuses = {};
     if (hoodieRecord.isPresent()) {
-      mayBeHandleSpuriousDeletes(hoodieRecord, partitionName);
+      handleSpuriousDeletes(hoodieRecord, partitionName);
       statuses = hoodieRecord.get().getData().getFileStatuses(hadoopConf.get(), partitionPath);
     }
 
@@ -350,7 +350,7 @@ public abstract class BaseTableMetadata implements HoodieTableMetadata {
 
     for (Pair<String, Option<HoodieRecord<HoodieMetadataPayload>>> entry: partitionsFileStatus) {
       if (entry.getValue().isPresent()) {
-        mayBeHandleSpuriousDeletes(entry.getValue(), entry.getKey());
+        handleSpuriousDeletes(entry.getValue(), entry.getKey());
         result.put(partitionInfo.get(entry.getKey()).toString(), entry.getValue().get().getData().getFileStatuses(hadoopConf.get(), partitionInfo.get(entry.getKey())));
       }
     }
@@ -360,11 +360,11 @@ public abstract class BaseTableMetadata implements HoodieTableMetadata {
   }
 
   /**
-   * Maybe handle spurious deletes. Depending on config, throw an exception or log a warn msg.
+   * Handle spurious deletes. Depending on config, throw an exception or log a warn msg.
    * @param hoodieRecord instance of {@link HoodieRecord} of interest.
    * @param partitionName partition name of interest.
    */
-  private void mayBeHandleSpuriousDeletes(Option<HoodieRecord<HoodieMetadataPayload>> hoodieRecord, String partitionName) {
+  private void handleSpuriousDeletes(Option<HoodieRecord<HoodieMetadataPayload>> hoodieRecord, String partitionName) {
     if (!hoodieRecord.get().getData().getDeletions().isEmpty()) {
       if (metadataConfig.ignoreSpuriousDeletes()) {
         LOG.warn("Metadata record for " + partitionName + " encountered some files to be deleted which was not added before. "
diff --git a/hudi-common/src/main/java/org/apache/hudi/metadata/HoodieTableMetadataUtil.java b/hudi-common/src/main/java/org/apache/hudi/metadata/HoodieTableMetadataUtil.java
index 5eafac2..bb4aaca 100644
--- a/hudi-common/src/main/java/org/apache/hudi/metadata/HoodieTableMetadataUtil.java
+++ b/hudi-common/src/main/java/org/apache/hudi/metadata/HoodieTableMetadataUtil.java
@@ -74,6 +74,7 @@ import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
 import java.util.Objects;
+import java.util.Set;
 import java.util.function.BiFunction;
 import java.util.stream.Collectors;
 import java.util.stream.Stream;
@@ -122,6 +123,39 @@ public class HoodieTableMetadataUtil {
   }
 
   /**
+   * Deletes the metadata partition from the file system.
+   *
+   * @param basePath      - base path of the dataset
+   * @param context       - instance of {@link HoodieEngineContext}
+   * @param partitionType - {@link MetadataPartitionType} of the partition to delete
+   */
+  public static void deleteMetadataPartition(String basePath, HoodieEngineContext context, MetadataPartitionType partitionType) {
+    final String metadataTablePath = HoodieTableMetadata.getMetadataTableBasePath(basePath);
+    FileSystem fs = FSUtils.getFs(metadataTablePath, context.getHadoopConf().get());
+    try {
+      fs.delete(new Path(metadataTablePath, partitionType.getPartitionPath()), true);
+    } catch (Exception e) {
+      throw new HoodieMetadataException(String.format("Failed to remove metadata partition %s from path %s", partitionType, metadataTablePath), e);
+    }
+  }
+
+  /**
+   * Check if the given metadata partition exists.
+   *
+   * @param basePath base path of the dataset
+   * @param context  instance of {@link HoodieEngineContext}.
+   */
+  public static boolean metadataPartitionExists(String basePath, HoodieEngineContext context, MetadataPartitionType partitionType) {
+    final String metadataTablePath = HoodieTableMetadata.getMetadataTableBasePath(basePath);
+    FileSystem fs = FSUtils.getFs(metadataTablePath, context.getHadoopConf().get());
+    try {
+      return fs.exists(new Path(metadataTablePath, partitionType.getPartitionPath()));
+    } catch (Exception e) {
+      throw new HoodieIOException(String.format("Failed to check metadata partition %s exists.", partitionType.getPartitionPath()));
+    }
+  }
+
+  /**
    * Convert commit action to metadata records for the enabled partition types.
    *
    * @param commitMetadata          - Commit action metadata
@@ -885,6 +919,24 @@ public class HoodieTableMetadataUtil {
     return fileSliceStream.sorted(Comparator.comparing(FileSlice::getFileId)).collect(Collectors.toList());
   }
 
+  /**
+   * Get the latest file slices for a given partition including the inflight ones.
+   *
+   * @param metaClient     - instance of {@link HoodieTableMetaClient}
+   * @param fileSystemView - hoodie table file system view, which will be fetched from meta client if not already present
+   * @param partition      - name of the partition whose file groups are to be loaded
+   * @return
+   */
+  public static List<FileSlice> getPartitionLatestFileSlicesIncludingInflight(HoodieTableMetaClient metaClient,
+                                                                              Option<HoodieTableFileSystemView> fileSystemView,
+                                                                              String partition) {
+    HoodieTableFileSystemView fsView = fileSystemView.orElse(getFileSystemView(metaClient));
+    Stream<FileSlice> fileSliceStream = fsView.fetchLatestFileSlicesIncludingInflight(partition);
+    return fileSliceStream
+        .sorted(Comparator.comparing(FileSlice::getFileId))
+        .collect(Collectors.toList());
+  }
+
   public static HoodieData<HoodieRecord> convertMetadataToColumnStatsRecords(HoodieCommitMetadata commitMetadata,
                                                                              HoodieEngineContext engineContext,
                                                                              MetadataRecordsGenerationParams recordsGenerationParams) {
@@ -900,8 +952,8 @@ public class HoodieTableMetadataUtil {
           Option.ofNullable(commitMetadata.getMetadata(HoodieCommitMetadata.SCHEMA_KEY))
               .flatMap(writerSchemaStr ->
                   isNullOrEmpty(writerSchemaStr)
-                    ? Option.empty()
-                    : Option.of(new Schema.Parser().parse(writerSchemaStr)));
+                      ? Option.empty()
+                      : Option.of(new Schema.Parser().parse(writerSchemaStr)));
 
       HoodieTableMetaClient dataTableMetaClient = recordsGenerationParams.getDataMetaClient();
       HoodieTableConfig tableConfig = dataTableMetaClient.getTableConfig();
@@ -1062,18 +1114,18 @@ public class HoodieTableMetadataUtil {
    * Aggregates column stats for each field.
    *
    * @param record                            - current record
-   * @param schema                            - write schema
+   * @param fields                            - fields for which stats will be aggregated
    * @param columnToStats                     - map of column to map of each stat and its value which gets updates in this method
    * @param consistentLogicalTimestampEnabled - flag to deal with logical timestamp type when getting column value
    */
-  public static void aggregateColumnStats(IndexedRecord record, Schema schema,
+  public static void aggregateColumnStats(IndexedRecord record, List<Schema.Field> fields,
                                           Map<String, Map<String, Object>> columnToStats,
                                           boolean consistentLogicalTimestampEnabled) {
     if (!(record instanceof GenericRecord)) {
       throw new HoodieIOException("Record is not a generic type to get column range metadata!");
     }
 
-    schema.getFields().forEach(field -> {
+    fields.forEach(field -> {
       Map<String, Object> columnStats = columnToStats.getOrDefault(field.name(), new HashMap<>());
       final String fieldVal = getNestedFieldValAsString((GenericRecord) record, field.name(), true, consistentLogicalTimestampEnabled);
       // update stats
@@ -1114,4 +1166,18 @@ public class HoodieTableMetadataUtil {
       throw new HoodieException("Failed to get latest columns for " + dataTableMetaClient.getBasePath(), e);
     }
   }
+
+  public static Set<String> getInflightMetadataPartitions(HoodieTableConfig tableConfig) {
+    return StringUtils.toSet(tableConfig.getMetadataPartitionsInflight());
+  }
+
+  public static Set<String> getCompletedMetadataPartitions(HoodieTableConfig tableConfig) {
+    return StringUtils.toSet(tableConfig.getMetadataPartitions());
+  }
+
+  public static Set<String> getInflightAndCompletedMetadataPartitions(HoodieTableConfig tableConfig) {
+    Set<String> inflightAndCompletedPartitions = getInflightMetadataPartitions(tableConfig);
+    inflightAndCompletedPartitions.addAll(getCompletedMetadataPartitions(tableConfig));
+    return inflightAndCompletedPartitions;
+  }
 }
diff --git a/hudi-common/src/main/java/org/apache/hudi/metadata/MetadataRecordsGenerationParams.java b/hudi-common/src/main/java/org/apache/hudi/metadata/MetadataRecordsGenerationParams.java
index 21d5b17..d28be75 100644
--- a/hudi-common/src/main/java/org/apache/hudi/metadata/MetadataRecordsGenerationParams.java
+++ b/hudi-common/src/main/java/org/apache/hudi/metadata/MetadataRecordsGenerationParams.java
@@ -35,15 +35,19 @@ public class MetadataRecordsGenerationParams implements Serializable {
   private final int bloomIndexParallelism;
   private final boolean isAllColumnStatsIndexEnabled;
   private final int columnStatsIndexParallelism;
+  private final List<String> columnsToIndex;
+  private final List<String> bloomSecondaryKeys;
 
   MetadataRecordsGenerationParams(HoodieTableMetaClient dataMetaClient, List<MetadataPartitionType> enabledPartitionTypes, String bloomFilterType, int bloomIndexParallelism,
-      boolean isAllColumnStatsIndexEnabled, int columnStatsIndexParallelism) {
+                                  boolean isAllColumnStatsIndexEnabled, int columnStatsIndexParallelism, List<String> columnsToIndex, List<String> bloomSecondaryKeys) {
     this.dataMetaClient = dataMetaClient;
     this.enabledPartitionTypes = enabledPartitionTypes;
     this.bloomFilterType = bloomFilterType;
     this.bloomIndexParallelism = bloomIndexParallelism;
     this.isAllColumnStatsIndexEnabled = isAllColumnStatsIndexEnabled;
     this.columnStatsIndexParallelism = columnStatsIndexParallelism;
+    this.columnsToIndex = columnsToIndex;
+    this.bloomSecondaryKeys = bloomSecondaryKeys;
   }
 
   public HoodieTableMetaClient getDataMetaClient() {
@@ -69,4 +73,12 @@ public class MetadataRecordsGenerationParams implements Serializable {
   public int getColumnStatsIndexParallelism() {
     return columnStatsIndexParallelism;
   }
+
+  public List<String> getColumnsToIndex() {
+    return columnsToIndex;
+  }
+
+  public List<String> getBloomSecondaryKeys() {
+    return bloomSecondaryKeys;
+  }
 }
diff --git a/hudi-common/src/test/java/org/apache/hudi/common/table/timeline/TestHoodieActiveTimeline.java b/hudi-common/src/test/java/org/apache/hudi/common/table/timeline/TestHoodieActiveTimeline.java
index 576cfd7..9ff17cd 100755
--- a/hudi-common/src/test/java/org/apache/hudi/common/table/timeline/TestHoodieActiveTimeline.java
+++ b/hudi-common/src/test/java/org/apache/hudi/common/table/timeline/TestHoodieActiveTimeline.java
@@ -200,6 +200,46 @@ public class TestHoodieActiveTimeline extends HoodieCommonTestHarness {
   }
 
   @Test
+  public void testGetContiguousCompletedWriteTimeline() {
+    // a mock timeline with holes
+    timeline = new MockHoodieTimeline(Stream.of("01", "03", "05", "07", "13", "15", "17"),
+        Stream.of("09", "11", "19"));
+    assertTrue(timeline.getContiguousCompletedWriteTimeline().lastInstant().isPresent());
+    assertEquals("07", timeline.getContiguousCompletedWriteTimeline().lastInstant().get().getTimestamp());
+
+    // add some instants where two are inflight and one of them (instant8 below) is not part of write timeline
+    HoodieInstant instant1 = new HoodieInstant(State.COMPLETED, HoodieTimeline.COMMIT_ACTION, "1");
+    HoodieInstant instant2 = new HoodieInstant(State.COMPLETED, HoodieTimeline.COMMIT_ACTION, "2");
+    HoodieInstant instant3 = new HoodieInstant(State.COMPLETED, HoodieTimeline.COMMIT_ACTION, "3");
+    HoodieInstant instant4 = new HoodieInstant(State.COMPLETED, HoodieTimeline.COMMIT_ACTION, "4");
+    HoodieInstant instant5 = new HoodieInstant(true, HoodieTimeline.COMMIT_ACTION, "5");
+    HoodieInstant instant6 = new HoodieInstant(State.COMPLETED, HoodieTimeline.COMMIT_ACTION, "6");
+    HoodieInstant instant7 = new HoodieInstant(State.COMPLETED, HoodieTimeline.COMMIT_ACTION, "7");
+    HoodieInstant instant8 = new HoodieInstant(true, HoodieTimeline.RESTORE_ACTION, "8");
+
+    timeline = new HoodieActiveTimeline(metaClient);
+    timeline.createNewInstant(instant1);
+    timeline.createNewInstant(instant2);
+    timeline.createNewInstant(instant3);
+    timeline.createNewInstant(instant4);
+    timeline.createNewInstant(instant5);
+    timeline.createNewInstant(instant6);
+    timeline.createNewInstant(instant7);
+    timeline.createNewInstant(instant8);
+    timeline.setInstants(Stream.of(instant1, instant2, instant3, instant4, instant5, instant6, instant7, instant8).collect(Collectors.toList()));
+
+    assertTrue(timeline.getContiguousCompletedWriteTimeline().lastInstant().isPresent());
+    assertEquals(instant4.getTimestamp(), timeline.getContiguousCompletedWriteTimeline().lastInstant().get().getTimestamp());
+    // transition both inflight instants to complete
+    timeline.saveAsComplete(new HoodieInstant(true, instant5.getAction(), instant5.getTimestamp()), Option.empty());
+    timeline.saveAsComplete(new HoodieInstant(true, instant8.getAction(), instant8.getTimestamp()), Option.empty());
+    timeline = timeline.reload();
+    // instant8 in not considered in write timeline, so last completed instant in timeline should be instant7
+    assertTrue(timeline.getContiguousCompletedWriteTimeline().lastInstant().isPresent());
+    assertEquals(instant7.getTimestamp(), timeline.getContiguousCompletedWriteTimeline().lastInstant().get().getTimestamp());
+  }
+
+  @Test
   public void testTimelineGetOperations() {
     List<HoodieInstant> allInstants = getAllInstants();
     Supplier<Stream<HoodieInstant>> sup = allInstants::stream;
@@ -218,20 +258,19 @@ public class TestHoodieActiveTimeline extends HoodieCommonTestHarness {
 
     // Test that various types of getXXX operations from HoodieActiveTimeline
     // return the correct set of Instant
-    checkTimeline.accept(timeline.getCommitsTimeline(),
-            CollectionUtils.createSet(HoodieTimeline.COMMIT_ACTION, HoodieTimeline.DELTA_COMMIT_ACTION, HoodieTimeline.REPLACE_COMMIT_ACTION));
-    checkTimeline.accept(timeline.getWriteTimeline(),
-            CollectionUtils.createSet(HoodieTimeline.COMMIT_ACTION, HoodieTimeline.DELTA_COMMIT_ACTION, HoodieTimeline.COMPACTION_ACTION, HoodieTimeline.REPLACE_COMMIT_ACTION));
+    checkTimeline.accept(timeline.getCommitsTimeline(), CollectionUtils.createSet(
+        HoodieTimeline.COMMIT_ACTION, HoodieTimeline.DELTA_COMMIT_ACTION, HoodieTimeline.REPLACE_COMMIT_ACTION));
+    checkTimeline.accept(timeline.getWriteTimeline(), CollectionUtils.createSet(
+        HoodieTimeline.COMMIT_ACTION, HoodieTimeline.DELTA_COMMIT_ACTION, HoodieTimeline.COMPACTION_ACTION, HoodieTimeline.REPLACE_COMMIT_ACTION));
     checkTimeline.accept(timeline.getCommitTimeline(),  CollectionUtils.createSet(HoodieTimeline.COMMIT_ACTION, HoodieTimeline.REPLACE_COMMIT_ACTION));
     checkTimeline.accept(timeline.getDeltaCommitTimeline(), Collections.singleton(HoodieTimeline.DELTA_COMMIT_ACTION));
     checkTimeline.accept(timeline.getCleanerTimeline(), Collections.singleton(HoodieTimeline.CLEAN_ACTION));
     checkTimeline.accept(timeline.getRollbackTimeline(), Collections.singleton(HoodieTimeline.ROLLBACK_ACTION));
     checkTimeline.accept(timeline.getRestoreTimeline(), Collections.singleton(HoodieTimeline.RESTORE_ACTION));
     checkTimeline.accept(timeline.getSavePointTimeline(), Collections.singleton(HoodieTimeline.SAVEPOINT_ACTION));
-    checkTimeline.accept(timeline.getAllCommitsTimeline(),
-            CollectionUtils.createSet(HoodieTimeline.COMMIT_ACTION, HoodieTimeline.DELTA_COMMIT_ACTION,
-                    HoodieTimeline.CLEAN_ACTION, HoodieTimeline.COMPACTION_ACTION, HoodieTimeline.REPLACE_COMMIT_ACTION,
-                    HoodieTimeline.SAVEPOINT_ACTION, HoodieTimeline.ROLLBACK_ACTION));
+    checkTimeline.accept(timeline.getAllCommitsTimeline(), CollectionUtils.createSet(
+        HoodieTimeline.COMMIT_ACTION, HoodieTimeline.DELTA_COMMIT_ACTION, HoodieTimeline.CLEAN_ACTION, HoodieTimeline.COMPACTION_ACTION,
+        HoodieTimeline.REPLACE_COMMIT_ACTION, HoodieTimeline.SAVEPOINT_ACTION, HoodieTimeline.ROLLBACK_ACTION, HoodieTimeline.INDEXING_ACTION));
 
     // Get some random Instants
     Random rand = new Random();
diff --git a/hudi-common/src/test/java/org/apache/hudi/common/util/TestStringUtils.java b/hudi-common/src/test/java/org/apache/hudi/common/util/TestStringUtils.java
index b402996..83a84a3 100644
--- a/hudi-common/src/test/java/org/apache/hudi/common/util/TestStringUtils.java
+++ b/hudi-common/src/test/java/org/apache/hudi/common/util/TestStringUtils.java
@@ -20,6 +20,12 @@ package org.apache.hudi.common.util;
 
 import org.junit.jupiter.api.Test;
 
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertNotEquals;
 import static org.junit.jupiter.api.Assertions.assertNull;
@@ -61,4 +67,20 @@ public class TestStringUtils {
     assertNotEquals(null, StringUtils.isNullOrEmpty("this is not empty"));
     assertTrue(StringUtils.isNullOrEmpty(""));
   }
+
+  @Test
+  public void testStringToSet() {
+    assertEquals(new HashSet<>(), StringUtils.toSet(null));
+    assertEquals(new HashSet<>(), StringUtils.toSet(""));
+    Set<String> expected = new HashSet<>(Arrays.asList("a", "b", "c"));
+    assertEquals(expected, StringUtils.toSet("a,b, c"));
+  }
+
+  @Test
+  public void testStringToList() {
+    assertEquals(new ArrayList<>(), StringUtils.toList(null));
+    assertEquals(new ArrayList<>(), StringUtils.toList(""));
+    List<String> expected = Arrays.asList("a", "b", "c");
+    assertEquals(expected, StringUtils.toList("a,b, c"));
+  }
 }
diff --git a/hudi-utilities/src/main/java/org/apache/hudi/utilities/HoodieClusteringJob.java b/hudi-utilities/src/main/java/org/apache/hudi/utilities/HoodieClusteringJob.java
index 2663962..f6905f9 100644
--- a/hudi-utilities/src/main/java/org/apache/hudi/utilities/HoodieClusteringJob.java
+++ b/hudi-utilities/src/main/java/org/apache/hudi/utilities/HoodieClusteringJob.java
@@ -20,24 +20,19 @@ package org.apache.hudi.utilities;
 
 import org.apache.hudi.client.SparkRDDWriteClient;
 import org.apache.hudi.common.config.TypedProperties;
-import org.apache.hudi.common.fs.FSUtils;
 import org.apache.hudi.common.model.HoodieCommitMetadata;
 import org.apache.hudi.common.model.HoodieRecordPayload;
 import org.apache.hudi.common.table.HoodieTableMetaClient;
-import org.apache.hudi.common.table.TableSchemaResolver;
 import org.apache.hudi.common.table.timeline.HoodieActiveTimeline;
 import org.apache.hudi.common.table.timeline.HoodieInstant;
 import org.apache.hudi.common.table.timeline.HoodieTimeline;
 import org.apache.hudi.common.util.Option;
 import org.apache.hudi.common.util.StringUtils;
 import org.apache.hudi.exception.HoodieClusteringException;
-import org.apache.hudi.exception.HoodieException;
 import org.apache.hudi.table.HoodieSparkTable;
 
 import com.beust.jcommander.JCommander;
 import com.beust.jcommander.Parameter;
-import org.apache.avro.Schema;
-import org.apache.hadoop.fs.FileSystem;
 import org.apache.hadoop.fs.Path;
 import org.apache.log4j.LogManager;
 import org.apache.log4j.Logger;
@@ -49,15 +44,15 @@ import java.util.ArrayList;
 import java.util.Date;
 import java.util.List;
 
+import static org.apache.hudi.utilities.UtilHelpers.EXECUTE;
+import static org.apache.hudi.utilities.UtilHelpers.SCHEDULE;
+import static org.apache.hudi.utilities.UtilHelpers.SCHEDULE_AND_EXECUTE;
+
 public class HoodieClusteringJob {
 
-  public static final String EXECUTE = "execute";
-  public static final String SCHEDULE = "schedule";
-  public static final String SCHEDULE_AND_EXECUTE = "scheduleandexecute";
   private static final Logger LOG = LogManager.getLogger(HoodieClusteringJob.class);
   private final Config cfg;
-  private transient FileSystem fs;
-  private TypedProperties props;
+  private final TypedProperties props;
   private final JavaSparkContext jsc;
   private final HoodieTableMetaClient metaClient;
 
@@ -83,34 +78,34 @@ public class HoodieClusteringJob {
     @Parameter(names = {"--instant-time", "-it"}, description = "Clustering Instant time, only used when set --mode execute. "
         + "If the instant time is not provided with --mode execute, "
         + "the earliest scheduled clustering instant time is used by default. "
-        + "When set \"--mode scheduleAndExecute\" this instant-time will be ignored.", required = false)
+        + "When set \"--mode scheduleAndExecute\" this instant-time will be ignored.")
     public String clusteringInstantTime = null;
-    @Parameter(names = {"--parallelism", "-pl"}, description = "Parallelism for hoodie insert", required = false)
+    @Parameter(names = {"--parallelism", "-pl"}, description = "Parallelism for hoodie insert")
     public int parallelism = 1;
-    @Parameter(names = {"--spark-master", "-ms"}, description = "Spark master", required = false)
+    @Parameter(names = {"--spark-master", "-ms"}, description = "Spark master")
     public String sparkMaster = null;
     @Parameter(names = {"--spark-memory", "-sm"}, description = "spark memory to use", required = true)
     public String sparkMemory = null;
-    @Parameter(names = {"--retry", "-rt"}, description = "number of retries", required = false)
+    @Parameter(names = {"--retry", "-rt"}, description = "number of retries")
     public int retry = 0;
 
     @Parameter(names = {"--schedule", "-sc"}, description = "Schedule clustering @desperate soon please use \"--mode schedule\" instead")
     public Boolean runSchedule = false;
 
     @Parameter(names = {"--retry-last-failed-clustering-job", "-rc"}, description = "Take effect when using --mode/-m scheduleAndExecute. Set true means "
-            + "check, rollback and execute last failed clustering plan instead of planing a new clustering job directly.", required = false)
+        + "check, rollback and execute last failed clustering plan instead of planing a new clustering job directly.")
     public Boolean retryLastFailedClusteringJob = false;
 
     @Parameter(names = {"--mode", "-m"}, description = "Set job mode: Set \"schedule\" means make a cluster plan; "
-            + "Set \"execute\" means execute a cluster plan at given instant which means --instant-time is needed here; "
-            + "Set \"scheduleAndExecute\" means make a cluster plan first and execute that plan immediately", required = false)
+        + "Set \"execute\" means execute a cluster plan at given instant which means --instant-time is needed here; "
+        + "Set \"scheduleAndExecute\" means make a cluster plan first and execute that plan immediately")
     public String runningMode = null;
 
     @Parameter(names = {"--help", "-h"}, help = true)
     public Boolean help = false;
 
     @Parameter(names = {"--job-max-processing-time-ms", "-jt"}, description = "Take effect when using --mode/-m scheduleAndExecute and --retry-last-failed-clustering-job/-rc true. "
-        + "If maxProcessingTimeMs passed but clustering job is still unfinished, hoodie would consider this job as failed and relaunch.", required = false)
+        + "If maxProcessingTimeMs passed but clustering job is still unfinished, hoodie would consider this job as failed and relaunch.")
     public long maxProcessingTimeMs = 0;
 
     @Parameter(names = {"--props"}, description = "path to properties file on localfs or dfs, with configurations for "
@@ -119,7 +114,7 @@ public class HoodieClusteringJob {
 
     @Parameter(names = {"--hoodie-conf"}, description = "Any configuration that can be set in the properties file "
         + "(using the CLI parameter \"--props\") can also be passed command line using this parameter. This can be repeated",
-            splitter = IdentitySplitter.class)
+        splitter = IdentitySplitter.class)
     public List<String> configs = new ArrayList<>();
   }
 
@@ -155,10 +150,9 @@ public class HoodieClusteringJob {
   }
 
   public int cluster(int retry) {
-    this.fs = FSUtils.getFs(cfg.basePath, jsc.hadoopConfiguration());
     // need to do validate in case that users call cluster() directly without setting cfg.runningMode
     validateRunningMode(cfg);
-    int ret = UtilHelpers.retry(retry, () -> {
+    return UtilHelpers.retry(retry, () -> {
       switch (cfg.runningMode.toLowerCase()) {
         case SCHEDULE: {
           LOG.info("Running Mode: [" + SCHEDULE + "]; Do schedule");
@@ -183,20 +177,10 @@ public class HoodieClusteringJob {
         }
       }
     }, "Cluster failed");
-    return ret;
-  }
-
-  private String getSchemaFromLatestInstant() throws Exception {
-    TableSchemaResolver schemaResolver = new TableSchemaResolver(metaClient);
-    if (metaClient.getActiveTimeline().getCommitsTimeline().filterCompletedInstants().countInstants() == 0) {
-      throw new HoodieException("Cannot run clustering without any completed commits");
-    }
-    Schema schema = schemaResolver.getTableAvroSchema(false);
-    return schema.toString();
   }
 
   private int doCluster(JavaSparkContext jsc) throws Exception {
-    String schemaStr = getSchemaFromLatestInstant();
+    String schemaStr = UtilHelpers.getSchemaFromLatestInstant(metaClient);
     try (SparkRDDWriteClient<HoodieRecordPayload> client = UtilHelpers.createHoodieClient(jsc, cfg.basePath, schemaStr, cfg.parallelism, Option.empty(), props)) {
       if (StringUtils.isNullOrEmpty(cfg.clusteringInstantTime)) {
         // Instant time is not specified
@@ -224,7 +208,7 @@ public class HoodieClusteringJob {
   }
 
   private Option<String> doSchedule(JavaSparkContext jsc) throws Exception {
-    String schemaStr = getSchemaFromLatestInstant();
+    String schemaStr = UtilHelpers.getSchemaFromLatestInstant(metaClient);
     try (SparkRDDWriteClient<HoodieRecordPayload> client = UtilHelpers.createHoodieClient(jsc, cfg.basePath, schemaStr, cfg.parallelism, Option.empty(), props)) {
       return doSchedule(client);
     }
@@ -240,7 +224,7 @@ public class HoodieClusteringJob {
 
   private int doScheduleAndCluster(JavaSparkContext jsc) throws Exception {
     LOG.info("Step 1: Do schedule");
-    String schemaStr = getSchemaFromLatestInstant();
+    String schemaStr = UtilHelpers.getSchemaFromLatestInstant(metaClient);
     try (SparkRDDWriteClient<HoodieRecordPayload> client = UtilHelpers.createHoodieClient(jsc, cfg.basePath, schemaStr, cfg.parallelism, Option.empty(), props)) {
       Option<String> instantTime = Option.empty();
 
diff --git a/hudi-utilities/src/main/java/org/apache/hudi/utilities/HoodieIndexer.java b/hudi-utilities/src/main/java/org/apache/hudi/utilities/HoodieIndexer.java
new file mode 100644
index 0000000..2741e2b
--- /dev/null
+++ b/hudi-utilities/src/main/java/org/apache/hudi/utilities/HoodieIndexer.java
@@ -0,0 +1,307 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.hudi.utilities;
+
+import org.apache.hudi.avro.model.HoodieIndexCommitMetadata;
+import org.apache.hudi.avro.model.HoodieIndexPartitionInfo;
+import org.apache.hudi.client.SparkRDDWriteClient;
+import org.apache.hudi.common.config.HoodieMetadataConfig;
+import org.apache.hudi.common.config.TypedProperties;
+import org.apache.hudi.common.model.HoodieRecordPayload;
+import org.apache.hudi.common.table.HoodieTableMetaClient;
+import org.apache.hudi.common.table.timeline.HoodieInstant;
+import org.apache.hudi.common.util.Option;
+import org.apache.hudi.exception.HoodieIndexException;
+import org.apache.hudi.metadata.MetadataPartitionType;
+
+import com.beust.jcommander.JCommander;
+import com.beust.jcommander.Parameter;
+import org.apache.hadoop.fs.Path;
+import org.apache.log4j.LogManager;
+import org.apache.log4j.Logger;
+import org.apache.spark.api.java.JavaSparkContext;
+import org.jetbrains.annotations.TestOnly;
+
+import java.io.Serializable;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Locale;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+import static org.apache.hudi.common.util.StringUtils.isNullOrEmpty;
+import static org.apache.hudi.common.util.ValidationUtils.checkArgument;
+import static org.apache.hudi.metadata.HoodieTableMetadataUtil.getCompletedMetadataPartitions;
+import static org.apache.hudi.utilities.UtilHelpers.EXECUTE;
+import static org.apache.hudi.utilities.UtilHelpers.SCHEDULE;
+import static org.apache.hudi.utilities.UtilHelpers.SCHEDULE_AND_EXECUTE;
+
+/**
+ * A tool to run metadata indexing asynchronously.
+ * <p>
+ * Example command (assuming indexer.properties contains related index configs, see {@link org.apache.hudi.common.config.HoodieMetadataConfig} for configs):
+ * <p>
+ * spark-submit \
+ * --class org.apache.hudi.utilities.HoodieIndexer \
+ * /path/to/hudi/packaging/hudi-utilities-bundle/target/hudi-utilities-bundle_2.11-0.11.0-SNAPSHOT.jar \
+ * --props /path/to/indexer.properties \
+ * --mode scheduleAndExecute \
+ * --base-path /tmp/hudi_trips_cow \
+ * --table-name hudi_trips_cow \
+ * --index-types COLUMN_STATS \
+ * --parallelism 1 \
+ * --spark-memory 1g
+ * <p>
+ * A sample indexer.properties file:
+ * <p>
+ * hoodie.metadata.index.async=true
+ * hoodie.metadata.index.column.stats.enable=true
+ * hoodie.metadata.index.check.timeout.seconds=60
+ * hoodie.write.concurrency.mode=optimistic_concurrency_control
+ * hoodie.write.lock.provider=org.apache.hudi.client.transaction.lock.ZookeeperBasedLockProvider
+ */
+public class HoodieIndexer {
+
+  private static final Logger LOG = LogManager.getLogger(HoodieIndexer.class);
+  private static final String DROP_INDEX = "dropindex";
+
+  private final HoodieIndexer.Config cfg;
+  private TypedProperties props;
+  private final JavaSparkContext jsc;
+  private final HoodieTableMetaClient metaClient;
+
+  public HoodieIndexer(JavaSparkContext jsc, HoodieIndexer.Config cfg) {
+    this.cfg = cfg;
+    this.jsc = jsc;
+    this.props = isNullOrEmpty(cfg.propsFilePath)
+        ? UtilHelpers.buildProperties(cfg.configs)
+        : readConfigFromFileSystem(jsc, cfg);
+    this.metaClient = UtilHelpers.createMetaClient(jsc, cfg.basePath, true);
+  }
+
+  private TypedProperties readConfigFromFileSystem(JavaSparkContext jsc, HoodieIndexer.Config cfg) {
+    return UtilHelpers.readConfig(jsc.hadoopConfiguration(), new Path(cfg.propsFilePath), cfg.configs)
+        .getProps(true);
+  }
+
+  public static class Config implements Serializable {
+    @Parameter(names = {"--base-path", "-sp"}, description = "Base path for the table", required = true)
+    public String basePath = null;
+    @Parameter(names = {"--table-name", "-tn"}, description = "Table name", required = true)
+    public String tableName = null;
+    @Parameter(names = {"--instant-time", "-it"}, description = "Indexing Instant time")
+    public String indexInstantTime = null;
+    @Parameter(names = {"--parallelism", "-pl"}, description = "Parallelism for hoodie insert", required = true)
+    public int parallelism = 1;
+    @Parameter(names = {"--spark-master", "-ms"}, description = "Spark master")
+    public String sparkMaster = null;
+    @Parameter(names = {"--spark-memory", "-sm"}, description = "spark memory to use", required = true)
+    public String sparkMemory = null;
+    @Parameter(names = {"--retry", "-rt"}, description = "number of retries")
+    public int retry = 0;
+    @Parameter(names = {"--index-types", "-ixt"}, description = "Comma-separated index types to be built, e.g. BLOOM_FILTERS,COLUMN_STATS", required = true)
+    public String indexTypes = null;
+    @Parameter(names = {"--mode", "-m"}, description = "Set job mode: Set \"schedule\" to generate an indexing plan; "
+        + "Set \"execute\" to execute the indexing plan at the given instant, which means --instant-time is required here; "
+        + "Set \"scheduleandExecute\" to generate an indexing plan first and execute that plan immediately;"
+        + "Set \"dropindex\" to drop the index types specified in --index-types;")
+    public String runningMode = null;
+    @Parameter(names = {"--help", "-h"}, help = true)
+    public Boolean help = false;
+
+    @Parameter(names = {"--props"}, description = "path to properties file on localfs or dfs, with configurations for hoodie client for indexing")
+    public String propsFilePath = null;
+
+    @Parameter(names = {"--hoodie-conf"}, description = "Any configuration that can be set in the properties file "
+        + "(using the CLI parameter \"--props\") can also be passed command line using this parameter. This can be repeated",
+        splitter = IdentitySplitter.class)
+    public List<String> configs = new ArrayList<>();
+  }
+
+  public static void main(String[] args) {
+    final HoodieIndexer.Config cfg = new HoodieIndexer.Config();
+    JCommander cmd = new JCommander(cfg, null, args);
+
+    if (cfg.help || args.length == 0) {
+      cmd.usage();
+      System.exit(1);
+    }
+
+    final JavaSparkContext jsc = UtilHelpers.buildSparkContext("indexing-" + cfg.tableName, cfg.sparkMaster, cfg.sparkMemory);
+    HoodieIndexer indexer = new HoodieIndexer(jsc, cfg);
+    int result = indexer.start(cfg.retry);
+    String resultMsg = String.format("Indexing with basePath: %s, tableName: %s, runningMode: %s",
+        cfg.basePath, cfg.tableName, cfg.runningMode);
+    if (result == -1) {
+      LOG.error(resultMsg + " failed");
+    } else {
+      LOG.info(resultMsg + " success");
+    }
+    jsc.stop();
+  }
+
+  public int start(int retry) {
+    // indexing should be done only if metadata is enabled
+    if (!props.getBoolean(HoodieMetadataConfig.ENABLE.key())) {
+      LOG.error(String.format("Metadata is not enabled. Please set %s to true.", HoodieMetadataConfig.ENABLE.key()));
+      return -1;
+    }
+
+    return UtilHelpers.retry(retry, () -> {
+      switch (cfg.runningMode.toLowerCase()) {
+        case SCHEDULE: {
+          LOG.info("Running Mode: [" + SCHEDULE + "]; Do schedule");
+          Option<String> instantTime = scheduleIndexing(jsc);
+          int result = instantTime.isPresent() ? 0 : -1;
+          if (result == 0) {
+            LOG.info("The schedule instant time is " + instantTime.get());
+          }
+          return result;
+        }
+        case SCHEDULE_AND_EXECUTE: {
+          LOG.info("Running Mode: [" + SCHEDULE_AND_EXECUTE + "]");
+          return scheduleAndRunIndexing(jsc);
+        }
+        case EXECUTE: {
+          LOG.info("Running Mode: [" + EXECUTE + "];");
+          return runIndexing(jsc);
+        }
+        case DROP_INDEX: {
+          LOG.info("Running Mode: [" + DROP_INDEX + "];");
+          return dropIndex(jsc);
+        }
+        default: {
+          LOG.info("Unsupported running mode [" + cfg.runningMode + "], quit the job directly");
+          return -1;
+        }
+      }
+    }, "Indexer failed");
+  }
+
+  @TestOnly
+  public Option<String> doSchedule() throws Exception {
+    return this.scheduleIndexing(jsc);
+  }
+
+  private Option<String> scheduleIndexing(JavaSparkContext jsc) throws Exception {
+    String schemaStr = UtilHelpers.getSchemaFromLatestInstant(metaClient);
+    try (SparkRDDWriteClient<HoodieRecordPayload> client = UtilHelpers.createHoodieClient(jsc, cfg.basePath, schemaStr, cfg.parallelism, Option.empty(), props)) {
+      return doSchedule(client);
+    }
+  }
+
+  private Option<String> doSchedule(SparkRDDWriteClient<HoodieRecordPayload> client) {
+    List<MetadataPartitionType> partitionTypes = getRequestedPartitionTypes(cfg.indexTypes);
+    checkArgument(partitionTypes.size() == 1, "Currently, only one index type can be scheduled at a time.");
+    if (indexExists(partitionTypes)) {
+      return Option.empty();
+    }
+    Option<String> indexingInstant = client.scheduleIndexing(partitionTypes);
+    if (!indexingInstant.isPresent()) {
+      LOG.error("Scheduling of index action did not return any instant.");
+    }
+    return indexingInstant;
+  }
+
+  private boolean indexExists(List<MetadataPartitionType> partitionTypes) {
+    Set<String> indexedMetadataPartitions = getCompletedMetadataPartitions(metaClient.getTableConfig());
+    Set<String> requestedIndexPartitionPaths = partitionTypes.stream().map(MetadataPartitionType::getPartitionPath).collect(Collectors.toSet());
+    requestedIndexPartitionPaths.retainAll(indexedMetadataPartitions);
+    if (!requestedIndexPartitionPaths.isEmpty()) {
+      LOG.error("Following indexes already built: " + requestedIndexPartitionPaths);
+      return true;
+    }
+    return false;
+  }
+
+  private int runIndexing(JavaSparkContext jsc) throws Exception {
+    String schemaStr = UtilHelpers.getSchemaFromLatestInstant(metaClient);
+    try (SparkRDDWriteClient<HoodieRecordPayload> client = UtilHelpers.createHoodieClient(jsc, cfg.basePath, schemaStr, cfg.parallelism, Option.empty(), props)) {
+      if (isNullOrEmpty(cfg.indexInstantTime)) {
+        // Instant time is not specified
+        // Find the earliest scheduled indexing instant for execution
+        Option<HoodieInstant> earliestPendingIndexInstant = metaClient.getActiveTimeline()
+            .filterPendingIndexTimeline()
+            .firstInstant();
+        if (earliestPendingIndexInstant.isPresent()) {
+          cfg.indexInstantTime = earliestPendingIndexInstant.get().getTimestamp();
+          LOG.info("Found the earliest scheduled indexing instant which will be executed: "
+              + cfg.indexInstantTime);
+        } else {
+          throw new HoodieIndexException("There is no scheduled indexing in the table.");
+        }
+      }
+      return handleResponse(client.index(cfg.indexInstantTime)) ? 0 : 1;
+    }
+  }
+
+  private int scheduleAndRunIndexing(JavaSparkContext jsc) throws Exception {
+    String schemaStr = UtilHelpers.getSchemaFromLatestInstant(metaClient);
+    try (SparkRDDWriteClient<HoodieRecordPayload> client = UtilHelpers.createHoodieClient(jsc, cfg.basePath, schemaStr, cfg.parallelism, Option.empty(), props)) {
+      Option<String> indexingInstantTime = doSchedule(client);
+      if (indexingInstantTime.isPresent()) {
+        return handleResponse(client.index(indexingInstantTime.get())) ? 0 : 1;
+      } else {
+        return -1;
+      }
+    }
+  }
+
+  private int dropIndex(JavaSparkContext jsc) throws Exception {
+    List<MetadataPartitionType> partitionTypes = getRequestedPartitionTypes(cfg.indexTypes);
+    String schemaStr = UtilHelpers.getSchemaFromLatestInstant(metaClient);
+    try (SparkRDDWriteClient<HoodieRecordPayload> client = UtilHelpers.createHoodieClient(jsc, cfg.basePath, schemaStr, cfg.parallelism, Option.empty(), props)) {
+      client.dropIndex(partitionTypes);
+      return 0;
+    } catch (Exception e) {
+      LOG.error("Failed to drop index. ", e);
+      return -1;
+    }
+  }
+
+  private boolean handleResponse(Option<HoodieIndexCommitMetadata> commitMetadata) {
+    if (!commitMetadata.isPresent()) {
+      LOG.error("Indexing failed as no commit metadata present.");
+      return false;
+    }
+    List<HoodieIndexPartitionInfo> indexPartitionInfos = commitMetadata.get().getIndexPartitionInfos();
+    LOG.info(String.format("Indexing complete for partitions: %s",
+        indexPartitionInfos.stream().map(HoodieIndexPartitionInfo::getMetadataPartitionPath).collect(Collectors.toList())));
+    return isIndexBuiltForAllRequestedTypes(indexPartitionInfos);
+  }
+
+  boolean isIndexBuiltForAllRequestedTypes(List<HoodieIndexPartitionInfo> indexPartitionInfos) {
+    Set<String> indexedPartitions = indexPartitionInfos.stream()
+        .map(HoodieIndexPartitionInfo::getMetadataPartitionPath).collect(Collectors.toSet());
+    Set<String> requestedPartitions = getRequestedPartitionTypes(cfg.indexTypes).stream()
+        .map(MetadataPartitionType::getPartitionPath).collect(Collectors.toSet());
+    requestedPartitions.removeAll(indexedPartitions);
+    return requestedPartitions.isEmpty();
+  }
+
+  List<MetadataPartitionType> getRequestedPartitionTypes(String indexTypes) {
+    List<String> requestedIndexTypes = Arrays.asList(indexTypes.split(","));
+    return requestedIndexTypes.stream()
+        .map(p -> MetadataPartitionType.valueOf(p.toUpperCase(Locale.ROOT)))
+        // FILES partition is initialized synchronously while getting metadata writer
+        .filter(p -> !MetadataPartitionType.FILES.equals(p))
+        .collect(Collectors.toList());
+  }
+}
diff --git a/hudi-utilities/src/main/java/org/apache/hudi/utilities/UtilHelpers.java b/hudi-utilities/src/main/java/org/apache/hudi/utilities/UtilHelpers.java
index 4dc0604..92e123b 100644
--- a/hudi-utilities/src/main/java/org/apache/hudi/utilities/UtilHelpers.java
+++ b/hudi-utilities/src/main/java/org/apache/hudi/utilities/UtilHelpers.java
@@ -104,21 +104,26 @@ import java.util.Properties;
  * Bunch of helper methods.
  */
 public class UtilHelpers {
+
+  public static final String EXECUTE = "execute";
+  public static final String SCHEDULE = "schedule";
+  public static final String SCHEDULE_AND_EXECUTE = "scheduleandexecute";
+
   private static final Logger LOG = LogManager.getLogger(UtilHelpers.class);
 
   public static Source createSource(String sourceClass, TypedProperties cfg, JavaSparkContext jssc,
-                                    SparkSession sparkSession, SchemaProvider schemaProvider,
-                                    HoodieDeltaStreamerMetrics metrics) throws IOException {
+      SparkSession sparkSession, SchemaProvider schemaProvider,
+      HoodieDeltaStreamerMetrics metrics) throws IOException {
     try {
       try {
         return (Source) ReflectionUtils.loadClass(sourceClass,
-            new Class<?>[]{TypedProperties.class, JavaSparkContext.class,
+            new Class<?>[] {TypedProperties.class, JavaSparkContext.class,
                 SparkSession.class, SchemaProvider.class,
                 HoodieDeltaStreamerMetrics.class},
             cfg, jssc, sparkSession, schemaProvider, metrics);
       } catch (HoodieException e) {
         return (Source) ReflectionUtils.loadClass(sourceClass,
-            new Class<?>[]{TypedProperties.class, JavaSparkContext.class,
+            new Class<?>[] {TypedProperties.class, JavaSparkContext.class,
                 SparkSession.class, SchemaProvider.class},
             cfg, jssc, sparkSession, schemaProvider);
       }
@@ -238,7 +243,7 @@ public class UtilHelpers {
   /**
    * Parse Schema from file.
    *
-   * @param fs         File System
+   * @param fs File System
    * @param schemaFile Schema File
    */
   public static String parseSchema(FileSystem fs, String schemaFile) throws Exception {
@@ -300,13 +305,13 @@ public class UtilHelpers {
   /**
    * Build Hoodie write client.
    *
-   * @param jsc         Java Spark Context
-   * @param basePath    Base Path
-   * @param schemaStr   Schema
+   * @param jsc Java Spark Context
+   * @param basePath Base Path
+   * @param schemaStr Schema
    * @param parallelism Parallelism
    */
   public static SparkRDDWriteClient<HoodieRecordPayload> createHoodieClient(JavaSparkContext jsc, String basePath, String schemaStr,
-                                                                            int parallelism, Option<String> compactionStrategyClass, TypedProperties properties) {
+      int parallelism, Option<String> compactionStrategyClass, TypedProperties properties) {
     HoodieCompactionConfig compactionConfig = compactionStrategyClass
         .map(strategy -> HoodieCompactionConfig.newBuilder().withInlineCompaction(false)
             .withCompactionStrategy(ReflectionUtils.loadClass(strategy)).build())
@@ -466,8 +471,7 @@ public class UtilHelpers {
         Option.ofNullable(createSchemaPostProcessor(schemaPostProcessorClass, cfg, jssc)));
   }
 
-  public static SchemaProvider createRowBasedSchemaProvider(StructType structType,
-                                                            TypedProperties cfg, JavaSparkContext jssc) {
+  public static SchemaProvider createRowBasedSchemaProvider(StructType structType, TypedProperties cfg, JavaSparkContext jssc) {
     SchemaProvider rowSchemaProvider = new RowBasedSchemaProvider(structType);
     return wrapSchemaProviderWithPostProcessor(rowSchemaProvider, cfg, jssc, null);
   }
@@ -476,13 +480,13 @@ public class UtilHelpers {
    * Create latest schema provider for Target schema.
    *
    * @param structType spark data type of incoming batch.
-   * @param jssc       instance of {@link JavaSparkContext}.
-   * @param fs         instance of {@link FileSystem}.
-   * @param basePath   base path of the table.
+   * @param jssc instance of {@link JavaSparkContext}.
+   * @param fs instance of {@link FileSystem}.
+   * @param basePath base path of the table.
    * @return the schema provider where target schema refers to latest schema(either incoming schema or table schema).
    */
   public static SchemaProvider createLatestSchemaProvider(StructType structType,
-                                                          JavaSparkContext jssc, FileSystem fs, String basePath) {
+      JavaSparkContext jssc, FileSystem fs, String basePath) {
     SchemaProvider rowSchemaProvider = new RowBasedSchemaProvider(structType);
     Schema writeSchema = rowSchemaProvider.getTargetSchema();
     Schema latestTableSchema = writeSchema;
@@ -540,4 +544,12 @@ public class UtilHelpers {
     return ret;
   }
 
+  public static String getSchemaFromLatestInstant(HoodieTableMetaClient metaClient) throws Exception {
+    TableSchemaResolver schemaResolver = new TableSchemaResolver(metaClient);
+    if (metaClient.getActiveTimeline().getCommitsTimeline().filterCompletedInstants().countInstants() == 0) {
+      throw new HoodieException("Cannot run clustering without any completed commits");
+    }
+    Schema schema = schemaResolver.getTableAvroSchema(false);
+    return schema.toString();
+  }
 }
diff --git a/hudi-utilities/src/test/java/org/apache/hudi/utilities/TestHoodieIndexer.java b/hudi-utilities/src/test/java/org/apache/hudi/utilities/TestHoodieIndexer.java
new file mode 100644
index 0000000..9ce8eef
--- /dev/null
+++ b/hudi-utilities/src/test/java/org/apache/hudi/utilities/TestHoodieIndexer.java
@@ -0,0 +1,122 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.hudi.utilities;
+
+import org.apache.hudi.avro.model.HoodieIndexCommitMetadata;
+import org.apache.hudi.avro.model.HoodieIndexPartitionInfo;
+import org.apache.hudi.client.HoodieReadClient;
+import org.apache.hudi.client.SparkRDDWriteClient;
+import org.apache.hudi.client.common.HoodieSparkEngineContext;
+import org.apache.hudi.common.engine.HoodieEngineContext;
+import org.apache.hudi.common.testutils.HoodieCommonTestHarness;
+import org.apache.hudi.common.testutils.HoodieTestUtils;
+import org.apache.hudi.metadata.MetadataPartitionType;
+import org.apache.hudi.testutils.providers.SparkProvider;
+
+import org.apache.spark.SparkConf;
+import org.apache.spark.api.java.JavaSparkContext;
+import org.apache.spark.sql.SQLContext;
+import org.apache.spark.sql.SparkSession;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import java.io.IOException;
+import java.util.Arrays;
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+public class TestHoodieIndexer extends HoodieCommonTestHarness implements SparkProvider {
+
+  private static transient SparkSession spark;
+  private static transient SQLContext sqlContext;
+  private static transient JavaSparkContext jsc;
+  private static transient HoodieSparkEngineContext context;
+
+  @BeforeEach
+  public void init() throws IOException {
+    boolean initialized = spark != null;
+    if (!initialized) {
+      SparkConf sparkConf = conf();
+      SparkRDDWriteClient.registerClasses(sparkConf);
+      HoodieReadClient.addHoodieSupport(sparkConf);
+      spark = SparkSession.builder().config(sparkConf).getOrCreate();
+      sqlContext = spark.sqlContext();
+      jsc = new JavaSparkContext(spark.sparkContext());
+      context = new HoodieSparkEngineContext(jsc);
+    }
+    initPath();
+    metaClient = HoodieTestUtils.init(basePath, getTableType());
+  }
+
+  @Test
+  public void testGetRequestedPartitionTypes() {
+    HoodieIndexer.Config config = new HoodieIndexer.Config();
+    config.basePath = basePath;
+    config.tableName = "indexer_test";
+    config.indexTypes = "FILES,BLOOM_FILTERS,COLUMN_STATS";
+    HoodieIndexer indexer = new HoodieIndexer(jsc, config);
+    List<MetadataPartitionType> partitionTypes = indexer.getRequestedPartitionTypes(config.indexTypes);
+    assertFalse(partitionTypes.contains(MetadataPartitionType.FILES));
+    assertTrue(partitionTypes.contains(MetadataPartitionType.BLOOM_FILTERS));
+    assertTrue(partitionTypes.contains(MetadataPartitionType.COLUMN_STATS));
+  }
+
+  @Test
+  public void testIsIndexBuiltForAllRequestedTypes() {
+    HoodieIndexer.Config config = new HoodieIndexer.Config();
+    config.basePath = basePath;
+    config.tableName = "indexer_test";
+    config.indexTypes = "BLOOM_FILTERS,COLUMN_STATS";
+    HoodieIndexer indexer = new HoodieIndexer(jsc, config);
+    HoodieIndexCommitMetadata commitMetadata = HoodieIndexCommitMetadata.newBuilder()
+        .setIndexPartitionInfos(Arrays.asList(new HoodieIndexPartitionInfo(
+            1,
+            MetadataPartitionType.COLUMN_STATS.getPartitionPath(),
+            "0000")))
+        .build();
+    assertFalse(indexer.isIndexBuiltForAllRequestedTypes(commitMetadata.getIndexPartitionInfos()));
+
+    config.indexTypes = "COLUMN_STATS";
+    indexer = new HoodieIndexer(jsc, config);
+    assertTrue(indexer.isIndexBuiltForAllRequestedTypes(commitMetadata.getIndexPartitionInfos()));
+  }
+
+  @Override
+  public HoodieEngineContext context() {
+    return context;
+  }
+
+  @Override
+  public SparkSession spark() {
+    return spark;
+  }
+
+  @Override
+  public SQLContext sqlContext() {
+    return sqlContext;
+  }
+
+  @Override
+  public JavaSparkContext jsc() {
+    return jsc;
+  }
+}
diff --git a/hudi-utilities/src/test/java/org/apache/hudi/utilities/functional/HoodieDeltaStreamerTestBase.java b/hudi-utilities/src/test/java/org/apache/hudi/utilities/functional/HoodieDeltaStreamerTestBase.java
index 304c25b..a9de85c 100644
--- a/hudi-utilities/src/test/java/org/apache/hudi/utilities/functional/HoodieDeltaStreamerTestBase.java
+++ b/hudi-utilities/src/test/java/org/apache/hudi/utilities/functional/HoodieDeltaStreamerTestBase.java
@@ -129,6 +129,7 @@ public class HoodieDeltaStreamerTestBase extends UtilitiesTestBase {
     UtilitiesTestBase.Helpers.copyToDFS("delta-streamer-config/uber_config.properties", dfs, dfsBasePath + "/config/uber_config.properties");
     UtilitiesTestBase.Helpers.copyToDFS("delta-streamer-config/short_trip_uber_config.properties", dfs, dfsBasePath + "/config/short_trip_uber_config.properties");
     UtilitiesTestBase.Helpers.copyToDFS("delta-streamer-config/clusteringjob.properties", dfs, dfsBasePath + "/clusteringjob.properties");
+    UtilitiesTestBase.Helpers.copyToDFS("delta-streamer-config/indexer.properties", dfs, dfsBasePath + "/indexer.properties");
 
     writeCommonPropsToFile(dfs, dfsBasePath);
 
diff --git a/hudi-utilities/src/test/java/org/apache/hudi/utilities/functional/TestHoodieDeltaStreamer.java b/hudi-utilities/src/test/java/org/apache/hudi/utilities/functional/TestHoodieDeltaStreamer.java
index 62b862e..2db72cb 100644
--- a/hudi-utilities/src/test/java/org/apache/hudi/utilities/functional/TestHoodieDeltaStreamer.java
+++ b/hudi-utilities/src/test/java/org/apache/hudi/utilities/functional/TestHoodieDeltaStreamer.java
@@ -57,6 +57,7 @@ import org.apache.hudi.hive.HoodieHiveClient;
 import org.apache.hudi.keygen.SimpleKeyGenerator;
 import org.apache.hudi.utilities.DummySchemaProvider;
 import org.apache.hudi.utilities.HoodieClusteringJob;
+import org.apache.hudi.utilities.HoodieIndexer;
 import org.apache.hudi.utilities.deltastreamer.DeltaSync;
 import org.apache.hudi.utilities.deltastreamer.HoodieDeltaStreamer;
 import org.apache.hudi.utilities.schema.FilebasedSchemaProvider;
@@ -129,6 +130,9 @@ import java.util.function.Function;
 import java.util.stream.Collectors;
 import java.util.stream.Stream;
 
+import static org.apache.hudi.utilities.UtilHelpers.EXECUTE;
+import static org.apache.hudi.utilities.UtilHelpers.SCHEDULE;
+import static org.apache.hudi.utilities.UtilHelpers.SCHEDULE_AND_EXECUTE;
 import static org.apache.hudi.utilities.deltastreamer.HoodieDeltaStreamer.CHECKPOINT_KEY;
 import static org.apache.hudi.utilities.schema.RowBasedSchemaProvider.HOODIE_RECORD_NAMESPACE;
 import static org.apache.hudi.utilities.schema.RowBasedSchemaProvider.HOODIE_RECORD_STRUCT_NAME;
@@ -397,6 +401,22 @@ public class TestHoodieDeltaStreamer extends HoodieDeltaStreamerTestBase {
       assertTrue(minExpected <= numDeltaCommits, "Got=" + numDeltaCommits + ", exp >=" + minExpected);
     }
 
+    static void assertPendingIndexCommit(String tablePath, FileSystem fs) {
+      HoodieTableMetaClient meta = HoodieTableMetaClient.builder().setConf(fs.getConf()).setBasePath(tablePath).setLoadActiveTimelineOnLoad(true).build();
+      HoodieTimeline timeline = meta.getActiveTimeline().getAllCommitsTimeline().filterPendingIndexTimeline();
+      LOG.info("Timeline Instants=" + meta.getActiveTimeline().getInstants().collect(Collectors.toList()));
+      int numIndexCommits = (int) timeline.getInstants().count();
+      assertEquals(1, numIndexCommits, "Got=" + numIndexCommits + ", exp=1");
+    }
+
+    static void assertCompletedIndexCommit(String tablePath, FileSystem fs) {
+      HoodieTableMetaClient meta = HoodieTableMetaClient.builder().setConf(fs.getConf()).setBasePath(tablePath).setLoadActiveTimelineOnLoad(true).build();
+      HoodieTimeline timeline = meta.getActiveTimeline().getAllCommitsTimeline().filterCompletedIndexTimeline();
+      LOG.info("Timeline Instants=" + meta.getActiveTimeline().getInstants().collect(Collectors.toList()));
+      int numIndexCommits = (int) timeline.getInstants().count();
+      assertEquals(1, numIndexCommits, "Got=" + numIndexCommits + ", exp=1");
+    }
+
     static void assertNoReplaceCommits(String tablePath, FileSystem fs) {
       HoodieTableMetaClient meta = HoodieTableMetaClient.builder().setConf(fs.getConf()).setBasePath(tablePath).setLoadActiveTimelineOnLoad(true).build();
       HoodieTimeline timeline = meta.getActiveTimeline().getCompletedReplaceTimeline();
@@ -961,6 +981,53 @@ public class TestHoodieDeltaStreamer extends HoodieDeltaStreamerTestBase {
     return config;
   }
 
+  private HoodieIndexer.Config buildIndexerConfig(String basePath,
+                                                  String tableName,
+                                                  String indexInstantTime,
+                                                  String runningMode,
+                                                  String indexTypes) {
+    HoodieIndexer.Config config = new HoodieIndexer.Config();
+    config.basePath = basePath;
+    config.tableName = tableName;
+    config.indexInstantTime = indexInstantTime;
+    config.propsFilePath = dfsBasePath + "/indexer.properties";
+    config.runningMode = runningMode;
+    config.indexTypes = indexTypes;
+    return config;
+  }
+
+  @Test
+  public void testHoodieIndexer() throws Exception {
+    String tableBasePath = dfsBasePath + "/asyncindexer";
+    HoodieDeltaStreamer ds = initialHoodieDeltaStreamer(tableBasePath, 1000, "false");
+
+    deltaStreamerTestRunner(ds, (r) -> {
+      TestHelpers.assertAtLeastNCommits(2, tableBasePath, dfs);
+
+      Option<String> scheduleIndexInstantTime = Option.empty();
+      try {
+        HoodieIndexer scheduleIndexingJob = new HoodieIndexer(jsc,
+            buildIndexerConfig(tableBasePath, ds.getConfig().targetTableName, null, SCHEDULE, "COLUMN_STATS"));
+        scheduleIndexInstantTime = scheduleIndexingJob.doSchedule();
+      } catch (Exception e) {
+        LOG.info("Schedule indexing failed", e);
+        return false;
+      }
+      if (scheduleIndexInstantTime.isPresent()) {
+        TestHelpers.assertPendingIndexCommit(tableBasePath, dfs);
+        LOG.info("Schedule indexing success, now build index with instant time " + scheduleIndexInstantTime.get());
+        HoodieIndexer runIndexingJob = new HoodieIndexer(jsc,
+            buildIndexerConfig(tableBasePath, ds.getConfig().targetTableName, scheduleIndexInstantTime.get(), EXECUTE, "COLUMN_STATS"));
+        runIndexingJob.start(0);
+        LOG.info("Metadata indexing success");
+        TestHelpers.assertCompletedIndexCommit(tableBasePath, dfs);
+      } else {
+        LOG.warn("Metadata indexing failed");
+      }
+      return true;
+    });
+  }
+
   @Disabled("HUDI-3710 to fix the ConcurrentModificationException")
   @ParameterizedTest
   @ValueSource(booleans = {true, false})
@@ -1131,28 +1198,28 @@ public class TestHoodieDeltaStreamer extends HoodieDeltaStreamerTestBase {
           LOG.info("Cluster success");
         } else {
           LOG.warn("Import failed");
-          if (!runningMode.toLowerCase().equals(HoodieClusteringJob.EXECUTE)) {
+          if (!runningMode.toLowerCase().equals(EXECUTE)) {
             return false;
           }
         }
       } catch (Exception e) {
         LOG.warn("ScheduleAndExecute clustering failed", e);
         exception = e;
-        if (!runningMode.equalsIgnoreCase(HoodieClusteringJob.EXECUTE)) {
+        if (!runningMode.equalsIgnoreCase(EXECUTE)) {
           return false;
         }
       }
       switch (runningMode.toLowerCase()) {
-        case HoodieClusteringJob.SCHEDULE_AND_EXECUTE: {
+        case SCHEDULE_AND_EXECUTE: {
           TestHelpers.assertAtLeastNReplaceCommits(2, tableBasePath, dfs);
           return true;
         }
-        case HoodieClusteringJob.SCHEDULE: {
+        case SCHEDULE: {
           TestHelpers.assertAtLeastNReplaceRequests(2, tableBasePath, dfs);
           TestHelpers.assertNoReplaceCommits(tableBasePath, dfs);
           return true;
         }
-        case HoodieClusteringJob.EXECUTE: {
+        case EXECUTE: {
           TestHelpers.assertNoReplaceCommits(tableBasePath, dfs);
           return true;
         }
diff --git a/hudi-utilities/src/test/resources/delta-streamer-config/indexer.properties b/hudi-utilities/src/test/resources/delta-streamer-config/indexer.properties
new file mode 100644
index 0000000..aa42f8f
--- /dev/null
+++ b/hudi-utilities/src/test/resources/delta-streamer-config/indexer.properties
@@ -0,0 +1,25 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+#
+
+hoodie.metadata.enable=true
+hoodie.metadata.index.async=true
+hoodie.metadata.index.column.stats.enable=true
+hoodie.metadata.index.check.timeout.seconds=60
+hoodie.write.concurrency.mode=optimistic_concurrency_control
+hoodie.write.lock.provider=org.apache.hudi.client.transaction.lock.InProcessLockProvider
\ No newline at end of file