HDFS-11074. Remove unused method FsDatasetSpi#getFinalizedBlocksOnPersistentStorage. Contributed by Hanisha Koneru.

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/FsDatasetSpi.java

@@ -242,9 +242,6 @@ public interface FsDatasetSpi<V extends FsVolumeSpi> extends FSDatasetMBean {
    */
   List<FinalizedReplica> getFinalizedBlocks(String bpid);
 
-  /** @return a list of finalized blocks for the given block pool. */
-  List<FinalizedReplica> getFinalizedBlocksOnPersistentStorage(String bpid);
-
   /**
    * Check whether the in-memory block record matches the block on the disk,
    * and, in case that they are not matched, update the record or mark it

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/FsDatasetImpl.java

@@ -1863,25 +1863,6 @@ class FsDatasetImpl implements FsDatasetSpi<FsVolumeImpl> {
     }
   }
 
-  /**
-   * Get the list of finalized blocks from in-memory blockmap for a block pool.
-   */
-  @Override
-  public List<FinalizedReplica>
-      getFinalizedBlocksOnPersistentStorage(String bpid) {
-    try(AutoCloseableLock lock = datasetLock.acquire()) {
-      ArrayList<FinalizedReplica> finalized =
-          new ArrayList<FinalizedReplica>(volumeMap.size(bpid));
-      for (ReplicaInfo b : volumeMap.replicas(bpid)) {
-        if (!b.getVolume().isTransientStorage() &&
-            b.getState() == ReplicaState.FINALIZED) {
-          finalized.add(new FinalizedReplica((FinalizedReplica) b));
-        }
-      }
-      return finalized;
-    }
-  }
-
   /**
    * Check if a block is valid.
    *

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/SimulatedFSDataset.java

@@ -1311,11 +1311,6 @@ public class SimulatedFSDataset implements FsDatasetSpi<FsVolumeSpi> {
     throw new UnsupportedOperationException();
   }
 
-  @Override
-  public List<FinalizedReplica> getFinalizedBlocksOnPersistentStorage(String bpid) {
-    throw new UnsupportedOperationException();
-  }
-
   @Override
   public Map<String, Object> getVolumeInfoMap() {
     throw new UnsupportedOperationException();

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/extdataset/ExternalDatasetImpl.java

@@ -92,11 +92,6 @@ public class ExternalDatasetImpl implements FsDatasetSpi<ExternalVolumeImpl> {
     return null;
   }
 
-  @Override
-  public List<FinalizedReplica> getFinalizedBlocksOnPersistentStorage(String bpid) {
-    return null;
-  }
-
   @Override
   public void checkAndUpdate(String bpid, long blockId, File diskFile,
       File diskMetaFile, FsVolumeSpi vol) {