diff --git a/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt b/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
index 3b2818981bf..01bb0fc28a5 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
+++ b/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
@@ -362,8 +362,6 @@ Release 2.8.0 - UNRELEASED
 
     HDFS-8709. Clarify automatic sync in FSEditLog#logEdit. (wang)
 
-    HDFS-8652. Track BlockInfo instead of Block in CorruptReplicasMap. (jing9)
-
   OPTIMIZATIONS
 
     HDFS-8026. Trace FSOutputSummer#writeChecksumChunks rather than
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockInfo.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockInfo.java
index 3557ba867b6..b048115f630 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockInfo.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockInfo.java
@@ -182,7 +182,7 @@ public abstract class  BlockInfo extends Block
    *                      information indicating the index of the block in the
    *                      corresponding block group.
    */
-  abstract void addStorage(DatanodeStorageInfo storage, Block reportedBlock);
+  abstract boolean addStorage(DatanodeStorageInfo storage, Block reportedBlock);
 
   /**
    * Remove {@link DatanodeStorageInfo} location for a block
@@ -195,11 +195,6 @@ public abstract class  BlockInfo extends Block
    */
   abstract void replaceBlock(BlockInfo newBlock);
 
-  /**
-   * @return true if there is no storage storing the block
-   */
-  abstract boolean hasEmptyStorage();
-
   /**
    * Find specified DatanodeStorageInfo.
    * @return DatanodeStorageInfo or null if not found.
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockInfoContiguous.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockInfoContiguous.java
index 561facab696..de64ad84b86 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockInfoContiguous.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockInfoContiguous.java
@@ -45,8 +45,8 @@ public class BlockInfoContiguous extends BlockInfo {
   }
 
   @Override
-  void addStorage(DatanodeStorageInfo storage, Block reportedBlock) {
-    ContiguousBlockStorageOp.addStorage(this, storage);
+  boolean addStorage(DatanodeStorageInfo storage, Block reportedBlock) {
+    return ContiguousBlockStorageOp.addStorage(this, storage);
   }
 
   @Override
@@ -73,9 +73,4 @@ public class BlockInfoContiguous extends BlockInfo {
     ucBlock.setBlockCollection(getBlockCollection());
     return ucBlock;
   }
-
-  @Override
-  boolean hasEmptyStorage() {
-    return ContiguousBlockStorageOp.hasEmptyStorage(this);
-  }
 }
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockInfoUnderConstruction.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockInfoUnderConstruction.java
index 7924709c2b6..9cd3987a5cb 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockInfoUnderConstruction.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockInfoUnderConstruction.java
@@ -18,6 +18,7 @@
 package org.apache.hadoop.hdfs.server.blockmanagement;
 
 import java.io.IOException;
+import java.util.ArrayList;
 import java.util.Iterator;
 import java.util.List;
 
@@ -273,17 +274,18 @@ public abstract class BlockInfoUnderConstruction extends BlockInfo {
           "No blocks found, lease removed.");
     }
     boolean allLiveReplicasTriedAsPrimary = true;
-    for (ReplicaUnderConstruction replica : replicas) {
+    for (int i = 0; i < replicas.size(); i++) {
       // Check if all replicas have been tried or not.
-      if (replica.isAlive()) {
-        allLiveReplicasTriedAsPrimary = allLiveReplicasTriedAsPrimary
-            && replica.getChosenAsPrimary();
+      if (replicas.get(i).isAlive()) {
+        allLiveReplicasTriedAsPrimary =
+            (allLiveReplicasTriedAsPrimary &&
+                replicas.get(i).getChosenAsPrimary());
       }
     }
     if (allLiveReplicasTriedAsPrimary) {
       // Just set all the replicas to be chosen whether they are alive or not.
-      for (ReplicaUnderConstruction replica : replicas) {
-        replica.setChosenAsPrimary(false);
+      for (int i = 0; i < replicas.size(); i++) {
+        replicas.get(i).setChosenAsPrimary(false);
       }
     }
     long mostRecentLastUpdate = 0;
@@ -343,6 +345,10 @@ public abstract class BlockInfoUnderConstruction extends BlockInfo {
    * Convert an under construction block to a complete block.
    *
    * @return a complete block.
+   * @throws IOException
+   *           if the state of the block (the generation stamp and the length)
+   *           has not been committed by the client or it does not have at
+   *           least a minimal number of replicas reported from data-nodes.
    */
   public abstract BlockInfo convertToCompleteBlock();
 
@@ -380,8 +386,8 @@ public abstract class BlockInfoUnderConstruction extends BlockInfo {
   }
 
   private void appendUCParts(StringBuilder sb) {
-    sb.append("{UCState=").append(blockUCState).append(", truncateBlock=")
-      .append(truncateBlock)
+    sb.append("{UCState=").append(blockUCState)
+      .append(", truncateBlock=" + truncateBlock)
       .append(", primaryNodeIndex=").append(primaryNodeIndex)
       .append(", replicas=[");
     if (replicas != null) {
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockInfoUnderConstructionContiguous.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockInfoUnderConstructionContiguous.java
index 963f247c55c..d3cb337b121 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockInfoUnderConstructionContiguous.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockInfoUnderConstructionContiguous.java
@@ -55,6 +55,10 @@ public class BlockInfoUnderConstructionContiguous extends
    * Convert an under construction block to a complete block.
    *
    * @return BlockInfo - a complete block.
+   * @throws IOException if the state of the block
+   * (the generation stamp and the length) has not been committed by
+   * the client or it does not have at least a minimal number of replicas
+   * reported from data-nodes.
    */
   @Override
   public BlockInfoContiguous convertToCompleteBlock() {
@@ -65,8 +69,8 @@ public class BlockInfoUnderConstructionContiguous extends
   }
 
   @Override
-  void addStorage(DatanodeStorageInfo storage, Block reportedBlock) {
-    ContiguousBlockStorageOp.addStorage(this, storage);
+  boolean addStorage(DatanodeStorageInfo storage, Block reportedBlock) {
+    return ContiguousBlockStorageOp.addStorage(this, storage);
   }
 
   @Override
@@ -84,11 +88,6 @@ public class BlockInfoUnderConstructionContiguous extends
     ContiguousBlockStorageOp.replaceBlock(this, newBlock);
   }
 
-  @Override
-  boolean hasEmptyStorage() {
-    return ContiguousBlockStorageOp.hasEmptyStorage(this);
-  }
-
   @Override
   public void setExpectedLocations(DatanodeStorageInfo[] targets) {
     int numLocations = targets == null ? 0 : targets.length;
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockManager.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockManager.java
index 1029ad44877..0b370301345 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockManager.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockManager.java
@@ -17,6 +17,7 @@
  */
 package org.apache.hadoop.hdfs.server.blockmanagement;
 
+import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_HA_NAMENODES_KEY_PREFIX;
 import static org.apache.hadoop.util.ExitUtil.terminate;
 
 import java.io.IOException;
@@ -195,7 +196,7 @@ public class BlockManager implements BlockStatsMXBean {
    * notified of all block deletions that might have been pending
    * when the failover happened.
    */
-  private final Set<BlockInfo> postponedMisreplicatedBlocks = Sets.newHashSet();
+  private final Set<Block> postponedMisreplicatedBlocks = Sets.newHashSet();
 
   /**
    * Maps a StorageID to the set of blocks that are "extra" for this
@@ -336,7 +337,8 @@ public class BlockManager implements BlockStatsMXBean {
             DFSConfigKeys.DFS_NAMENODE_REPLICATION_STREAMS_HARD_LIMIT_KEY,
             DFSConfigKeys.DFS_NAMENODE_REPLICATION_STREAMS_HARD_LIMIT_DEFAULT);
     this.shouldCheckForEnoughRacks =
-        conf.get(DFSConfigKeys.NET_TOPOLOGY_SCRIPT_FILE_NAME_KEY) != null;
+        conf.get(DFSConfigKeys.NET_TOPOLOGY_SCRIPT_FILE_NAME_KEY) == null
+            ? false : true;
 
     this.blocksInvalidateWorkPct = DFSUtil.getInvalidateWorkPctPerIteration(conf);
     this.blocksReplWorkMultiplier = DFSUtil.getReplWorkMultiplier(conf);
@@ -455,7 +457,8 @@ public class BlockManager implements BlockStatsMXBean {
 
   /** Should the access keys be updated? */
   boolean shouldUpdateBlockKey(final long updateTime) throws IOException {
-    return isBlockTokenEnabled() && blockTokenSecretManager.updateKeys(updateTime);
+    return isBlockTokenEnabled()? blockTokenSecretManager.updateKeys(updateTime)
+        : false;
   }
 
   public void activate(Configuration conf) {
@@ -508,14 +511,14 @@ public class BlockManager implements BlockStatsMXBean {
     synchronized (neededReplications) {
       out.println("Metasave: Blocks waiting for replication: " + 
                   neededReplications.size());
-      for (BlockInfo block : neededReplications) {
+      for (Block block : neededReplications) {
         dumpBlockMeta(block, out);
       }
     }
     
     // Dump any postponed over-replicated blocks
     out.println("Mis-replicated blocks that have been postponed:");
-    for (BlockInfo block : postponedMisreplicatedBlocks) {
+    for (Block block : postponedMisreplicatedBlocks) {
       dumpBlockMeta(block, out);
     }
 
@@ -533,9 +536,11 @@ public class BlockManager implements BlockStatsMXBean {
    * Dump the metadata for the given block in a human-readable
    * form.
    */
-  private void dumpBlockMeta(BlockInfo block, PrintWriter out) {
-    List<DatanodeDescriptor> containingNodes = new ArrayList<>();
-    List<DatanodeStorageInfo> containingLiveReplicasNodes = new ArrayList<>();
+  private void dumpBlockMeta(Block block, PrintWriter out) {
+    List<DatanodeDescriptor> containingNodes =
+                                      new ArrayList<DatanodeDescriptor>();
+    List<DatanodeStorageInfo> containingLiveReplicasNodes =
+      new ArrayList<>();
 
     NumberReplicas numReplicas = new NumberReplicas();
     // source node returned is not used
@@ -543,16 +548,17 @@ public class BlockManager implements BlockStatsMXBean {
         containingLiveReplicasNodes, numReplicas,
         UnderReplicatedBlocks.LEVEL);
     
-    // containingLiveReplicasNodes can include READ_ONLY_SHARED replicas which
-    // are not included in the numReplicas.liveReplicas() count
+    // containingLiveReplicasNodes can include READ_ONLY_SHARED replicas which are 
+    // not included in the numReplicas.liveReplicas() count
     assert containingLiveReplicasNodes.size() >= numReplicas.liveReplicas();
     int usableReplicas = numReplicas.liveReplicas() +
                          numReplicas.decommissionedAndDecommissioning();
-
-    BlockCollection bc = block.getBlockCollection();
-    String fileName = (bc == null) ? "[orphaned]" : bc.getName();
-    out.print(fileName + ": ");
-
+    
+    if (block instanceof BlockInfo) {
+      BlockCollection bc = ((BlockInfo) block).getBlockCollection();
+      String fileName = (bc == null) ? "[orphaned]" : bc.getName();
+      out.print(fileName + ": ");
+    }
     // l: == live:, d: == decommissioned c: == corrupt e: == excess
     out.print(block + ((usableReplicas > 0)? "" : " MISSING") + 
               " (replicas:" +
@@ -561,8 +567,8 @@ public class BlockManager implements BlockStatsMXBean {
               " c: " + numReplicas.corruptReplicas() +
               " e: " + numReplicas.excessReplicas() + ") "); 
 
-    Collection<DatanodeDescriptor> corruptNodes =
-        corruptReplicas.getNodes(block);
+    Collection<DatanodeDescriptor> corruptNodes = 
+                                  corruptReplicas.getNodes(block);
     
     for (DatanodeStorageInfo storage : getStorages(block)) {
       final DatanodeDescriptor node = storage.getDatanodeDescriptor();
@@ -799,8 +805,7 @@ public class BlockManager implements BlockStatsMXBean {
       final long offset, final long length, final int nrBlocksToReturn,
       final AccessMode mode) throws IOException {
     int curBlk;
-    long curPos = 0;
-    long blkSize;
+    long curPos = 0, blkSize = 0;
     int nrBlocks = (blocks[0].getNumBytes() == 0) ? 0 : blocks.length;
     for (curBlk = 0; curBlk < nrBlocks; curBlk++) {
       blkSize = blocks[curBlk].getNumBytes();
@@ -1190,11 +1195,10 @@ public class BlockManager implements BlockStatsMXBean {
   }
 
   /**
-   * Mark a replica (of a contiguous block) or an internal block (of a striped
-   * block group) as corrupt.
-   * @param b Indicating the reported bad block and the corresponding BlockInfo
-   *          stored in blocksMap.
+   * 
+   * @param b
    * @param storageInfo storage that contains the block, if known. null otherwise.
+   * @throws IOException
    */
   private void markBlockAsCorrupt(BlockToMarkCorrupt b,
       DatanodeStorageInfo storageInfo,
@@ -1215,7 +1219,7 @@ public class BlockManager implements BlockStatsMXBean {
     }
 
     // Add this replica to corruptReplicas Map
-    corruptReplicas.addToCorruptReplicasMap(b.stored, node, b.reason,
+    corruptReplicas.addToCorruptReplicasMap(b.corrupted, node, b.reason,
         b.reasonCode);
 
     NumberReplicas numberOfReplicas = countNodes(b.stored);
@@ -1237,7 +1241,7 @@ public class BlockManager implements BlockStatsMXBean {
     if (hasEnoughLiveReplicas || hasMoreCorruptReplicas
         || corruptedDuringWrite) {
       // the block is over-replicated so invalidate the replicas immediately
-      invalidateBlock(b, node, numberOfReplicas);
+      invalidateBlock(b, node);
     } else if (namesystem.isPopulatingReplQueues()) {
       // add the block to neededReplication
       updateNeededReplications(b.stored, -1, 0);
@@ -1245,15 +1249,12 @@ public class BlockManager implements BlockStatsMXBean {
   }
 
   /**
-   * Invalidates the given block on the given datanode. Note that before this
-   * call we have already checked the current live replicas of the block and
-   * make sure it's safe to invalidate the replica.
-   *
-   * @return true if the replica was successfully invalidated and no longer
-   *         associated with the DataNode.
+   * Invalidates the given block on the given datanode.
+   * @return true if the block was successfully invalidated and no longer
+   * present in the BlocksMap
    */
-  private boolean invalidateBlock(BlockToMarkCorrupt b, DatanodeInfo dn,
-      NumberReplicas nr) throws IOException {
+  private boolean invalidateBlock(BlockToMarkCorrupt b, DatanodeInfo dn
+      ) throws IOException {
     blockLog.info("BLOCK* invalidateBlock: {} on {}", b, dn);
     DatanodeDescriptor node = getDatanodeManager().getDatanode(dn);
     if (node == null) {
@@ -1262,30 +1263,35 @@ public class BlockManager implements BlockStatsMXBean {
     }
 
     // Check how many copies we have of the block
+    NumberReplicas nr = countNodes(b.stored);
     if (nr.replicasOnStaleNodes() > 0) {
       blockLog.info("BLOCK* invalidateBlocks: postponing " +
           "invalidation of {} on {} because {} replica(s) are located on " +
           "nodes with potentially out-of-date block reports", b, dn,
           nr.replicasOnStaleNodes());
-      postponeBlock(b.stored);
+      postponeBlock(b.corrupted);
       return false;
-    } else {
-      // we already checked the number of replicas in the caller of this
-      // function and we know there is at least one copy on a live node, so we
-      // can delete it.
+    } else if (nr.liveReplicas() >= 1) {
+      // If we have at least one copy on a live node, then we can delete it.
       addToInvalidates(b.corrupted, dn);
       removeStoredBlock(b.stored, node);
       blockLog.debug("BLOCK* invalidateBlocks: {} on {} listed for deletion.",
           b, dn);
       return true;
+    } else {
+      blockLog.info("BLOCK* invalidateBlocks: {} on {} is the only copy and" +
+          " was not deleted", b, dn);
+      return false;
     }
   }
 
+
   public void setPostponeBlocksFromFuture(boolean postpone) {
     this.shouldPostponeBlocksFromFuture  = postpone;
   }
 
-  private void postponeBlock(BlockInfo blk) {
+
+  private void postponeBlock(Block blk) {
     if (postponedMisreplicatedBlocks.add(blk)) {
       postponedMisreplicatedBlocksCount.incrementAndGet();
     }
@@ -1359,7 +1365,7 @@ public class BlockManager implements BlockStatsMXBean {
     int requiredReplication, numEffectiveReplicas;
     List<DatanodeDescriptor> containingNodes;
     DatanodeDescriptor srcNode;
-    BlockCollection bc;
+    BlockCollection bc = null;
     int additionalReplRequired;
 
     int scheduledWork = 0;
@@ -1518,9 +1524,9 @@ public class BlockManager implements BlockStatsMXBean {
         DatanodeStorageInfo[] targets = rw.targets;
         if (targets != null && targets.length != 0) {
           StringBuilder targetList = new StringBuilder("datanode(s)");
-          for (DatanodeStorageInfo target : targets) {
+          for (int k = 0; k < targets.length; k++) {
             targetList.append(' ');
-            targetList.append(target.getDatanodeDescriptor());
+            targetList.append(targets[k].getDatanodeDescriptor());
           }
           blockLog.info("BLOCK* ask {} to replicate {} to {}", rw.srcNode,
               rw.block, targetList);
@@ -1597,8 +1603,8 @@ public class BlockManager implements BlockStatsMXBean {
     List<DatanodeDescriptor> datanodeDescriptors = null;
     if (nodes != null) {
       datanodeDescriptors = new ArrayList<>(nodes.size());
-      for (String nodeStr : nodes) {
-        DatanodeDescriptor node = datanodeManager.getDatanodeDescriptor(nodeStr);
+      for (int i = 0; i < nodes.size(); i++) {
+        DatanodeDescriptor node = datanodeManager.getDatanodeDescriptor(nodes.get(i));
         if (node != null) {
           datanodeDescriptors.add(node);
         }
@@ -1637,7 +1643,7 @@ public class BlockManager implements BlockStatsMXBean {
    *         the given block
    */
    @VisibleForTesting
-   DatanodeDescriptor chooseSourceDatanode(BlockInfo block,
+   DatanodeDescriptor chooseSourceDatanode(Block block,
        List<DatanodeDescriptor> containingNodes,
        List<DatanodeStorageInfo>  nodesContainingLiveReplicas,
        NumberReplicas numReplicas,
@@ -1717,16 +1723,16 @@ public class BlockManager implements BlockStatsMXBean {
     if (timedOutItems != null) {
       namesystem.writeLock();
       try {
-        for (BlockInfo timedOutItem : timedOutItems) {
+        for (int i = 0; i < timedOutItems.length; i++) {
           /*
            * Use the blockinfo from the blocksmap to be certain we're working
            * with the most up-to-date block information (e.g. genstamp).
            */
-          BlockInfo bi = getStoredBlock(timedOutItem);
+          BlockInfo bi = getStoredBlock(timedOutItems[i]);
           if (bi == null) {
             continue;
           }
-          NumberReplicas num = countNodes(timedOutItem);
+          NumberReplicas num = countNodes(timedOutItems[i]);
           if (isNeededReplication(bi, getReplication(bi), num.liveReplicas())) {
             neededReplications.add(bi, num.liveReplicas(),
                 num.decommissionedAndDecommissioning(), getReplication(bi));
@@ -1743,7 +1749,7 @@ public class BlockManager implements BlockStatsMXBean {
 
   public long requestBlockReportLeaseId(DatanodeRegistration nodeReg) {
     assert namesystem.hasReadLock();
-    DatanodeDescriptor node;
+    DatanodeDescriptor node = null;
     try {
       node = datanodeManager.getDatanode(nodeReg);
     } catch (UnregisteredNodeException e) {
@@ -2005,7 +2011,7 @@ public class BlockManager implements BlockStatsMXBean {
           startIndex += (base+1);
         }
       }
-      Iterator<BlockInfo> it = postponedMisreplicatedBlocks.iterator();
+      Iterator<Block> it = postponedMisreplicatedBlocks.iterator();
       for (int tmp = 0; tmp < startIndex; tmp++) {
         it.next();
       }
@@ -2100,7 +2106,7 @@ public class BlockManager implements BlockStatsMXBean {
       long oldGenerationStamp, long oldNumBytes,
       DatanodeStorageInfo[] newStorages) throws IOException {
     assert namesystem.hasWriteLock();
-    BlockToMarkCorrupt b;
+    BlockToMarkCorrupt b = null;
     if (block.getGenerationStamp() != oldGenerationStamp) {
       b = new BlockToMarkCorrupt(oldBlock, block, oldGenerationStamp,
           "genstamp does not match " + oldGenerationStamp
@@ -2702,7 +2708,7 @@ public class BlockManager implements BlockStatsMXBean {
           " but corrupt replicas map has " + corruptReplicasCount);
     }
     if ((corruptReplicasCount > 0) && (numLiveReplicas >= fileReplication)) {
-      invalidateCorruptReplicas(storedBlock, reportedBlock, num);
+      invalidateCorruptReplicas(storedBlock, reportedBlock);
     }
     return storedBlock;
   }
@@ -2735,20 +2741,18 @@ public class BlockManager implements BlockStatsMXBean {
    *
    * @param blk Block whose corrupt replicas need to be invalidated
    */
-  private void invalidateCorruptReplicas(BlockInfo blk, Block reported,
-      NumberReplicas numberReplicas) {
+  private void invalidateCorruptReplicas(BlockInfo blk, Block reported) {
     Collection<DatanodeDescriptor> nodes = corruptReplicas.getNodes(blk);
     boolean removedFromBlocksMap = true;
     if (nodes == null)
       return;
     // make a copy of the array of nodes in order to avoid
     // ConcurrentModificationException, when the block is removed from the node
-    DatanodeDescriptor[] nodesCopy = nodes.toArray(
-        new DatanodeDescriptor[nodes.size()]);
+    DatanodeDescriptor[] nodesCopy = nodes.toArray(new DatanodeDescriptor[0]);
     for (DatanodeDescriptor node : nodesCopy) {
       try {
         if (!invalidateBlock(new BlockToMarkCorrupt(reported, blk, null,
-            Reason.ANY), node, numberReplicas)) {
+            Reason.ANY), node)) {
           removedFromBlocksMap = false;
         }
       } catch (IOException e) {
@@ -2798,6 +2802,7 @@ public class BlockManager implements BlockStatsMXBean {
         replicationQueuesInitializer.join();
       } catch (final InterruptedException e) {
         LOG.warn("Interrupted while waiting for replicationQueueInitializer. Returning..");
+        return;
       } finally {
         replicationQueuesInitializer = null;
       }
@@ -3159,7 +3164,8 @@ public class BlockManager implements BlockStatsMXBean {
       CachedBlock cblock = namesystem.getCacheManager().getCachedBlocks()
           .get(new CachedBlock(storedBlock.getBlockId(), (short) 0, false));
       if (cblock != null) {
-        boolean removed = node.getPendingCached().remove(cblock);
+        boolean removed = false;
+        removed |= node.getPendingCached().remove(cblock);
         removed |= node.getCached().remove(cblock);
         removed |= node.getPendingUncached().remove(cblock);
         if (removed) {
@@ -3375,7 +3381,7 @@ public class BlockManager implements BlockStatsMXBean {
     int excess = 0;
     int stale = 0;
     Collection<DatanodeDescriptor> nodesCorrupt = corruptReplicas.getNodes(b);
-    for (DatanodeStorageInfo storage : blocksMap.getStorages(b, State.NORMAL)) {
+    for(DatanodeStorageInfo storage : blocksMap.getStorages(b, State.NORMAL)) {
       final DatanodeDescriptor node = storage.getDatanodeDescriptor();
       if ((nodesCorrupt != null) && (nodesCorrupt.contains(node))) {
         corrupt++;
@@ -3396,8 +3402,7 @@ public class BlockManager implements BlockStatsMXBean {
         stale++;
       }
     }
-    return new NumberReplicas(live, decommissioned, decommissioning, corrupt,
-        excess, stale);
+    return new NumberReplicas(live, decommissioned, decommissioning, corrupt, excess, stale);
   }
 
   /** 
@@ -3580,6 +3585,8 @@ public class BlockManager implements BlockStatsMXBean {
       String src, BlockInfo[] blocks) {
     for (BlockInfo b: blocks) {
       if (!b.isComplete()) {
+        final BlockInfoUnderConstruction uc =
+            (BlockInfoUnderConstruction)b;
         final int numNodes = b.numNodes();
         final int min = getMinStorageNum(b);
         final BlockUCState state = b.getBlockUCState();
@@ -3705,7 +3712,11 @@ public class BlockManager implements BlockStatsMXBean {
     return blocksMap.getBlockCollection(b);
   }
 
-  public void removeBlockFromMap(BlockInfo block) {
+  public int numCorruptReplicas(Block block) {
+    return corruptReplicas.numCorruptReplicas(block);
+  }
+
+  public void removeBlockFromMap(Block block) {
     removeFromExcessReplicateMap(block);
     blocksMap.removeBlock(block);
     // If block is removed from blocksMap remove it from corruptReplicasMap
@@ -3715,7 +3726,7 @@ public class BlockManager implements BlockStatsMXBean {
   /**
    * If a block is removed from blocksMap, remove it from excessReplicateMap.
    */
-  private void removeFromExcessReplicateMap(BlockInfo block) {
+  private void removeFromExcessReplicateMap(Block block) {
     for (DatanodeStorageInfo info : getStorages(block)) {
       String uuid = info.getDatanodeDescriptor().getDatanodeUuid();
       LightWeightLinkedSet<BlockInfo> excessReplicas =
@@ -3746,14 +3757,14 @@ public class BlockManager implements BlockStatsMXBean {
   /**
    * Get the replicas which are corrupt for a given block.
    */
-  public Collection<DatanodeDescriptor> getCorruptReplicas(BlockInfo block) {
+  public Collection<DatanodeDescriptor> getCorruptReplicas(Block block) {
     return corruptReplicas.getNodes(block);
   }
 
  /**
   * Get reason for certain corrupted replicas for a given block and a given dn.
   */
- public String getCorruptReason(BlockInfo block, DatanodeDescriptor node) {
+ public String getCorruptReason(Block block, DatanodeDescriptor node) {
    return corruptReplicas.getCorruptReason(block, node);
  }
 
@@ -3847,7 +3858,7 @@ public class BlockManager implements BlockStatsMXBean {
     datanodeManager.clearPendingQueues();
     postponedMisreplicatedBlocks.clear();
     postponedMisreplicatedBlocksCount.set(0);
-  }
+  };
 
   public static LocatedBlock newLocatedBlock(
       ExtendedBlock b, DatanodeStorageInfo[] storages,
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlocksMap.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlocksMap.java
index 85cea5ab99e..0dbf4858b7c 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlocksMap.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlocksMap.java
@@ -117,7 +117,7 @@ class BlocksMap {
    * remove it from all data-node lists it belongs to;
    * and remove all data-node locations associated with the block.
    */
-  void removeBlock(BlockInfo block) {
+  void removeBlock(Block block) {
     BlockInfo blockInfo = blocks.remove(block);
     if (blockInfo == null)
       return;
@@ -190,7 +190,7 @@ class BlocksMap {
     // remove block from the data-node list and the node from the block info
     boolean removed = node.removeBlock(info);
 
-    if (info.hasEmptyStorage()     // no datanodes left
+    if (info.getDatanode(0) == null     // no datanodes left
               && info.isDeleted()) {  // does not belong to a file
       blocks.remove(b);  // remove block from the map
     }
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/ContiguousBlockStorageOp.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/ContiguousBlockStorageOp.java
index 70251e17cb6..092f65ec3cb 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/ContiguousBlockStorageOp.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/ContiguousBlockStorageOp.java
@@ -45,12 +45,13 @@ class ContiguousBlockStorageOp {
     return last;
   }
 
-  static void addStorage(BlockInfo b, DatanodeStorageInfo storage) {
+  static boolean addStorage(BlockInfo b, DatanodeStorageInfo storage) {
     // find the last null node
     int lastNode = ensureCapacity(b, 1);
     b.setStorageInfo(lastNode, storage);
     b.setNext(lastNode, null);
     b.setPrevious(lastNode, null);
+    return true;
   }
 
   static boolean removeStorage(BlockInfo b,
@@ -102,8 +103,4 @@ class ContiguousBlockStorageOp {
           "newBlock already exists.");
     }
   }
-
-  static boolean hasEmptyStorage(BlockInfo b) {
-    return b.getStorageInfo(0) == null;
-  }
 }
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/CorruptReplicasMap.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/CorruptReplicasMap.java
index 9a0023de0aa..fc2e23408f2 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/CorruptReplicasMap.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/CorruptReplicasMap.java
@@ -17,8 +17,8 @@
  */
 package org.apache.hadoop.hdfs.server.blockmanagement;
 
-import com.google.common.annotations.VisibleForTesting;
 import org.apache.hadoop.classification.InterfaceAudience;
+import org.apache.hadoop.hdfs.protocol.Block;
 import org.apache.hadoop.hdfs.server.namenode.NameNode;
 import org.apache.hadoop.ipc.Server;
 
@@ -46,12 +46,8 @@ public class CorruptReplicasMap{
     CORRUPTION_REPORTED  // client or datanode reported the corruption
   }
 
-  /**
-   * Used to track corrupted replicas (for contiguous block) or internal blocks
-   * (for striped block) and the corresponding DataNodes. For a striped block,
-   * the key here is the striped block group object stored in the blocksMap.
-   */
-  private final SortedMap<BlockInfo, Map<DatanodeDescriptor, Reason>> corruptReplicasMap = new TreeMap<>();
+  private final SortedMap<Block, Map<DatanodeDescriptor, Reason>> corruptReplicasMap =
+    new TreeMap<Block, Map<DatanodeDescriptor, Reason>>();
 
   /**
    * Mark the block belonging to datanode as corrupt.
@@ -61,21 +57,21 @@ public class CorruptReplicasMap{
    * @param reason a textual reason (for logging purposes)
    * @param reasonCode the enum representation of the reason
    */
-  void addToCorruptReplicasMap(BlockInfo blk, DatanodeDescriptor dn,
+  void addToCorruptReplicasMap(Block blk, DatanodeDescriptor dn,
       String reason, Reason reasonCode) {
     Map <DatanodeDescriptor, Reason> nodes = corruptReplicasMap.get(blk);
     if (nodes == null) {
-      nodes = new HashMap<>();
+      nodes = new HashMap<DatanodeDescriptor, Reason>();
       corruptReplicasMap.put(blk, nodes);
     }
-
+    
     String reasonText;
     if (reason != null) {
       reasonText = " because " + reason;
     } else {
       reasonText = "";
     }
-
+    
     if (!nodes.keySet().contains(dn)) {
       NameNode.blockStateChangeLog.info(
           "BLOCK NameSystem.addToCorruptReplicasMap: {} added as corrupt on "
@@ -96,7 +92,7 @@ public class CorruptReplicasMap{
    *
    * @param blk Block to be removed
    */
-  void removeFromCorruptReplicasMap(BlockInfo blk) {
+  void removeFromCorruptReplicasMap(Block blk) {
     if (corruptReplicasMap != null) {
       corruptReplicasMap.remove(blk);
     }
@@ -109,13 +105,12 @@ public class CorruptReplicasMap{
    * @return true if the removal is successful; 
              false if the replica is not in the map
    */ 
-  boolean removeFromCorruptReplicasMap(BlockInfo blk,
-      DatanodeDescriptor datanode) {
+  boolean removeFromCorruptReplicasMap(Block blk, DatanodeDescriptor datanode) {
     return removeFromCorruptReplicasMap(blk, datanode, Reason.ANY);
   }
 
-  boolean removeFromCorruptReplicasMap(BlockInfo blk,
-      DatanodeDescriptor datanode, Reason reason) {
+  boolean removeFromCorruptReplicasMap(Block blk, DatanodeDescriptor datanode,
+      Reason reason) {
     Map <DatanodeDescriptor, Reason> datanodes = corruptReplicasMap.get(blk);
     if (datanodes==null)
       return false;
@@ -144,9 +139,11 @@ public class CorruptReplicasMap{
    * @param blk Block for which nodes are requested
    * @return collection of nodes. Null if does not exists
    */
-  Collection<DatanodeDescriptor> getNodes(BlockInfo blk) {
-    Map<DatanodeDescriptor, Reason> nodes = corruptReplicasMap.get(blk);
-    return nodes != null ? nodes.keySet() : null;
+  Collection<DatanodeDescriptor> getNodes(Block blk) {
+    Map <DatanodeDescriptor, Reason> nodes = corruptReplicasMap.get(blk);
+    if (nodes == null)
+      return null;
+    return nodes.keySet();
   }
 
   /**
@@ -156,12 +153,12 @@ public class CorruptReplicasMap{
    * @param node DatanodeDescriptor which holds the replica
    * @return true if replica is corrupt, false if does not exists in this map
    */
-  boolean isReplicaCorrupt(BlockInfo blk, DatanodeDescriptor node) {
+  boolean isReplicaCorrupt(Block blk, DatanodeDescriptor node) {
     Collection<DatanodeDescriptor> nodes = getNodes(blk);
     return ((nodes != null) && (nodes.contains(node)));
   }
 
-  int numCorruptReplicas(BlockInfo blk) {
+  int numCorruptReplicas(Block blk) {
     Collection<DatanodeDescriptor> nodes = getNodes(blk);
     return (nodes == null) ? 0 : nodes.size();
   }
@@ -171,9 +168,9 @@ public class CorruptReplicasMap{
   }
 
   /**
-   * Return a range of corrupt replica block ids. Up to numExpectedBlocks
+   * Return a range of corrupt replica block ids. Up to numExpectedBlocks 
    * blocks starting at the next block after startingBlockId are returned
-   * (fewer if numExpectedBlocks blocks are unavailable). If startingBlockId
+   * (fewer if numExpectedBlocks blocks are unavailable). If startingBlockId 
    * is null, up to numExpectedBlocks blocks are returned from the beginning.
    * If startingBlockId cannot be found, null is returned.
    *
@@ -184,39 +181,44 @@ public class CorruptReplicasMap{
    * @return Up to numExpectedBlocks blocks from startingBlockId if it exists
    *
    */
-  @VisibleForTesting
   long[] getCorruptReplicaBlockIds(int numExpectedBlocks,
                                    Long startingBlockId) {
     if (numExpectedBlocks < 0 || numExpectedBlocks > 100) {
       return null;
     }
-    Iterator<BlockInfo> blockIt = corruptReplicasMap.keySet().iterator();
+    
+    Iterator<Block> blockIt = corruptReplicasMap.keySet().iterator();
+    
     // if the starting block id was specified, iterate over keys until
     // we find the matching block. If we find a matching block, break
-    // to leave the iterator on the next block after the specified block.
+    // to leave the iterator on the next block after the specified block. 
     if (startingBlockId != null) {
       boolean isBlockFound = false;
       while (blockIt.hasNext()) {
-        BlockInfo b = blockIt.next();
+        Block b = blockIt.next();
         if (b.getBlockId() == startingBlockId) {
           isBlockFound = true;
-          break;
+          break; 
         }
       }
+      
       if (!isBlockFound) {
         return null;
       }
     }
 
-    ArrayList<Long> corruptReplicaBlockIds = new ArrayList<>();
+    ArrayList<Long> corruptReplicaBlockIds = new ArrayList<Long>();
+
     // append up to numExpectedBlocks blockIds to our list
     for(int i=0; i<numExpectedBlocks && blockIt.hasNext(); i++) {
       corruptReplicaBlockIds.add(blockIt.next().getBlockId());
     }
+    
     long[] ret = new long[corruptReplicaBlockIds.size()];
     for(int i=0; i<ret.length; i++) {
       ret[i] = corruptReplicaBlockIds.get(i);
     }
+    
     return ret;
   }
 
@@ -227,7 +229,7 @@ public class CorruptReplicasMap{
    * @param node datanode that contains this corrupted replica
    * @return reason
    */
-  String getCorruptReason(BlockInfo block, DatanodeDescriptor node) {
+  String getCorruptReason(Block block, DatanodeDescriptor node) {
     Reason reason = null;
     if(corruptReplicasMap.containsKey(block)) {
       if (corruptReplicasMap.get(block).containsKey(node)) {
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSDirWriteFileOp.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSDirWriteFileOp.java
index eebeac024ab..4830d5d864a 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSDirWriteFileOp.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSDirWriteFileOp.java
@@ -71,7 +71,7 @@ class FSDirWriteFileOp {
   private FSDirWriteFileOp() {}
   static boolean unprotectedRemoveBlock(
       FSDirectory fsd, String path, INodesInPath iip, INodeFile fileNode,
-      BlockInfo block) throws IOException {
+      Block block) throws IOException {
     // modify file-> block and blocksMap
     // fileNode should be under construction
     BlockInfoUnderConstruction uc = fileNode.removeLastBlock(block);
@@ -136,9 +136,7 @@ class FSDirWriteFileOp {
     fsd.writeLock();
     try {
       // Remove the block from the pending creates list
-      BlockInfo storedBlock = fsd.getBlockManager().getStoredBlock(localBlock);
-      if (storedBlock != null &&
-          !unprotectedRemoveBlock(fsd, src, iip, file, storedBlock)) {
+      if (!unprotectedRemoveBlock(fsd, src, iip, file, localBlock)) {
         return;
       }
     } finally {
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSEditLogLoader.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSEditLogLoader.java
index af900e24859..804dbb55415 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSEditLogLoader.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSEditLogLoader.java
@@ -1038,7 +1038,7 @@ public class FSEditLogLoader {
         throw new IOException("Trying to remove more than one block from file "
             + path);
       }
-      BlockInfo oldBlock = oldBlocks[oldBlocks.length - 1];
+      Block oldBlock = oldBlocks[oldBlocks.length - 1];
       boolean removed = FSDirWriteFileOp.unprotectedRemoveBlock(
           fsDir, path, iip, file, oldBlock);
       if (!removed && !(op instanceof UpdateBlocksOp)) {
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/NamenodeFsck.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/NamenodeFsck.java
index fb6ceb2c617..846abcd9de3 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/NamenodeFsck.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/NamenodeFsck.java
@@ -265,8 +265,10 @@ public class NamenodeFsck implements DataEncryptionKeyFactory {
       out.println("No. of corrupted Replica: " +
           numberReplicas.corruptReplicas());
       //record datanodes that have corrupted block replica
-      Collection<DatanodeDescriptor> corruptionRecord =
-          bm.getCorruptReplicas(blockInfo);
+      Collection<DatanodeDescriptor> corruptionRecord = null;
+      if (bm.getCorruptReplicas(block) != null) {
+        corruptionRecord = bm.getCorruptReplicas(block);
+      }
 
       //report block replicas status on datanodes
       for(int idx = (blockInfo.numNodes()-1); idx >= 0; idx--) {
@@ -275,7 +277,7 @@ public class NamenodeFsck implements DataEncryptionKeyFactory {
             dn.getNetworkLocation() + " ");
         if (corruptionRecord != null && corruptionRecord.contains(dn)) {
           out.print(CORRUPT_STATUS+"\t ReasonCode: "+
-            bm.getCorruptReason(blockInfo, dn));
+            bm.getCorruptReason(block,dn));
         } else if (dn.isDecommissioned() ){
           out.print(DECOMMISSIONED_STATUS);
         } else if (dn.isDecommissionInProgress()) {
@@ -637,7 +639,7 @@ public class NamenodeFsck implements DataEncryptionKeyFactory {
               LightWeightLinkedSet<BlockInfo> blocksExcess =
                   bm.excessReplicateMap.get(dnDesc.getDatanodeUuid());
               Collection<DatanodeDescriptor> corruptReplicas =
-                  bm.getCorruptReplicas(storedBlock);
+                  bm.getCorruptReplicas(block.getLocalBlock());
               sb.append("(");
               if (dnDesc.isDecommissioned()) {
                 sb.append("DECOMMISSIONED)");
@@ -645,7 +647,7 @@ public class NamenodeFsck implements DataEncryptionKeyFactory {
                 sb.append("DECOMMISSIONING)");
               } else if (corruptReplicas != null && corruptReplicas.contains(dnDesc)) {
                 sb.append("CORRUPT)");
-              } else if (blocksExcess != null && blocksExcess.contains(storedBlock)) {
+              } else if (blocksExcess != null && blocksExcess.contains(block.getLocalBlock())) {
                 sb.append("EXCESS)");
               } else if (dnDesc.isStale(this.staleInterval)) {
                 sb.append("STALE_NODE)");
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/DFSTestUtil.java b/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/DFSTestUtil.java
index e2e85777dab..c07969163b6 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/DFSTestUtil.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/DFSTestUtil.java
@@ -574,8 +574,7 @@ public class DFSTestUtil {
       throws TimeoutException, InterruptedException {
     int count = 0;
     final int ATTEMPTS = 50;
-    int repls = BlockManagerTestUtil.numCorruptReplicas(ns.getBlockManager(),
-        b.getLocalBlock());
+    int repls = ns.getBlockManager().numCorruptReplicas(b.getLocalBlock());
     while (repls != corruptRepls && count < ATTEMPTS) {
       try {
         IOUtils.copyBytes(fs.open(file), new IOUtils.NullOutputStream(),
@@ -587,8 +586,7 @@ public class DFSTestUtil {
       count++;
       // check more often so corrupt block reports are not easily missed
       for (int i = 0; i < 10; i++) {
-        repls = BlockManagerTestUtil.numCorruptReplicas(ns.getBlockManager(),
-            b.getLocalBlock());
+        repls = ns.getBlockManager().numCorruptReplicas(b.getLocalBlock());
         Thread.sleep(100);
         if (repls == corruptRepls) {
           break;
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockManagerTestUtil.java b/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockManagerTestUtil.java
index a899891baaa..148135bae97 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockManagerTestUtil.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockManagerTestUtil.java
@@ -24,7 +24,6 @@ import java.util.HashSet;
 import java.util.Set;
 import java.util.concurrent.ExecutionException;
 
-import com.google.common.annotations.VisibleForTesting;
 import org.apache.hadoop.hdfs.DFSConfigKeys;
 import org.apache.hadoop.hdfs.DFSTestUtil;
 import org.apache.hadoop.hdfs.protocol.Block;
@@ -88,7 +87,7 @@ public class BlockManagerTestUtil {
       final Block b) {
     final Set<String> rackSet = new HashSet<String>(0);
     final Collection<DatanodeDescriptor> corruptNodes = 
-       getCorruptReplicas(blockManager).getNodes(blockManager.getStoredBlock(b));
+       getCorruptReplicas(blockManager).getNodes(b);
     for(DatanodeStorageInfo storage : blockManager.blocksMap.getStorages(b)) {
       final DatanodeDescriptor cur = storage.getDatanodeDescriptor();
       if (!cur.isDecommissionInProgress() && !cur.isDecommissioned()) {
@@ -307,8 +306,4 @@ public class BlockManagerTestUtil {
       throws ExecutionException, InterruptedException {
     dm.getDecomManager().runMonitor();
   }
-
-  public static int numCorruptReplicas(BlockManager bm, Block block) {
-    return bm.corruptReplicas.numCorruptReplicas(bm.getStoredBlock(block));
-  }
 }
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/TestBlockInfo.java b/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/TestBlockInfo.java
index c23f3d00925..bae4f1d41bb 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/TestBlockInfo.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/TestBlockInfo.java
@@ -63,7 +63,9 @@ public class TestBlockInfo {
 
     final DatanodeStorageInfo storage = DFSTestUtil.createDatanodeStorageInfo("storageID", "127.0.0.1");
 
-    blockInfo.addStorage(storage, blockInfo);
+    boolean added = blockInfo.addStorage(storage, blockInfo);
+
+    Assert.assertTrue(added);
     Assert.assertEquals(storage, blockInfo.getStorageInfo(0));
   }
 
@@ -71,7 +73,7 @@ public class TestBlockInfo {
   public void testCopyConstructor() {
     BlockInfo old = new BlockInfoContiguous((short) 3);
     try {
-      BlockInfo copy = new BlockInfoContiguous(old);
+      BlockInfo copy = new BlockInfoContiguous((BlockInfoContiguous)old);
       assertEquals(old.getBlockCollection(), copy.getBlockCollection());
       assertEquals(old.getCapacity(), copy.getCapacity());
     } catch (Exception e) {
@@ -108,8 +110,8 @@ public class TestBlockInfo {
     final int MAX_BLOCKS = 10;
 
     DatanodeStorageInfo dd = DFSTestUtil.createDatanodeStorageInfo("s1", "1.1.1.1");
-    ArrayList<Block> blockList = new ArrayList<>(MAX_BLOCKS);
-    ArrayList<BlockInfo> blockInfoList = new ArrayList<>();
+    ArrayList<Block> blockList = new ArrayList<Block>(MAX_BLOCKS);
+    ArrayList<BlockInfo> blockInfoList = new ArrayList<BlockInfo>();
     int headIndex;
     int curIndex;
 
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/TestBlockManager.java b/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/TestBlockManager.java
index f6cc747208a..9e316708541 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/TestBlockManager.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/TestBlockManager.java
@@ -509,7 +509,7 @@ public class TestBlockManager {
         + " even if all available source nodes have reached their replication"
         + " limits below the hard limit.",
         bm.chooseSourceDatanode(
-            bm.getStoredBlock(aBlock),
+            aBlock,
             cntNodes,
             liveNodes,
             new NumberReplicas(),
@@ -519,7 +519,7 @@ public class TestBlockManager {
         + " replication since all available source nodes have reached"
         + " their replication limits.",
         bm.chooseSourceDatanode(
-            bm.getStoredBlock(aBlock),
+            aBlock,
             cntNodes,
             liveNodes,
             new NumberReplicas(),
@@ -532,7 +532,7 @@ public class TestBlockManager {
     assertNull("Does not choose a source node for a highest-priority"
         + " replication when all available nodes exceed the hard limit.",
         bm.chooseSourceDatanode(
-            bm.getStoredBlock(aBlock),
+            aBlock,
             cntNodes,
             liveNodes,
             new NumberReplicas(),
@@ -558,7 +558,7 @@ public class TestBlockManager {
         + " if all available source nodes have reached their replication"
         + " limits below the hard limit.",
         bm.chooseSourceDatanode(
-            bm.getStoredBlock(aBlock),
+            aBlock,
             cntNodes,
             liveNodes,
             new NumberReplicas(),
@@ -572,7 +572,7 @@ public class TestBlockManager {
     assertNull("Does not choose a source decommissioning node for a normal"
         + " replication when all available nodes exceed the hard limit.",
         bm.chooseSourceDatanode(
-            bm.getStoredBlock(aBlock),
+            aBlock,
             cntNodes,
             liveNodes,
             new NumberReplicas(),
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/TestCorruptReplicaInfo.java b/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/TestCorruptReplicaInfo.java
index 1a49beebd89..21fb54e289c 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/TestCorruptReplicaInfo.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/TestCorruptReplicaInfo.java
@@ -48,19 +48,20 @@ public class TestCorruptReplicaInfo {
   private static final Log LOG = 
                            LogFactory.getLog(TestCorruptReplicaInfo.class);
   
-  private final Map<Long, BlockInfo> block_map = new HashMap<>();
+  private final Map<Long, Block> block_map =
+    new HashMap<Long, Block>();  
     
   // Allow easy block creation by block id
   // Return existing block if one with same block id already exists
-  private BlockInfo getBlock(Long block_id) {
+  private Block getBlock(Long block_id) {
     if (!block_map.containsKey(block_id)) {
-      block_map.put(block_id,
-          new BlockInfoContiguous(new Block(block_id, 0, 0), (short) 1));
+      block_map.put(block_id, new Block(block_id,0,0));
     }
+    
     return block_map.get(block_id);
   }
   
-  private BlockInfo getBlock(int block_id) {
+  private Block getBlock(int block_id) {
     return getBlock((long)block_id);
   }
   
@@ -81,7 +82,7 @@ public class TestCorruptReplicaInfo {
       // create a list of block_ids. A list is used to allow easy validation of the
       // output of getCorruptReplicaBlockIds
       int NUM_BLOCK_IDS = 140;
-      List<Long> block_ids = new LinkedList<>();
+      List<Long> block_ids = new LinkedList<Long>();
       for (int i=0;i<NUM_BLOCK_IDS;i++) {
         block_ids.add((long)i);
       }
@@ -129,7 +130,7 @@ public class TestCorruptReplicaInfo {
   }
   
   private static void addToCorruptReplicasMap(CorruptReplicasMap crm,
-      BlockInfo blk, DatanodeDescriptor dn) {
+      Block blk, DatanodeDescriptor dn) {
     crm.addToCorruptReplicasMap(blk, dn, "TEST", Reason.NONE);
   }
 }