HDFS-7936. Erasure coding: resolving conflicts when merging with HDFS-7903 and HDFS-7435. Contributed by Zhe Zhang.

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/DecommissionManager.java

@@ -535,7 +535,7 @@ public class DecommissionManager {
      */
     private void processBlocksForDecomInternal(
         final DatanodeDescriptor datanode,
-        final Iterator<BlockInfoContiguous> it,
+        final Iterator<? extends BlockInfo> it,
         final List<BlockInfoContiguous> insufficientlyReplicated,
         boolean pruneSufficientlyReplicated) {
       boolean firstReplicationLog = true;

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java

@@ -2030,7 +2030,7 @@ public class FSNamesystem implements Namesystem, FSNamesystemMBean,
     }
 
     // Check if the file is already being truncated with the same length
-    final BlockInfoContiguous last = file.getLastBlock();
+    final BlockInfo last = file.getLastBlock();
     if (last != null && last.getBlockUCState() == BlockUCState.UNDER_RECOVERY) {
       final Block truncateBlock
           = ((BlockInfoContiguousUnderConstruction)last).getTruncateBlock();

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/snapshot/FileDiffList.java

@@ -21,6 +21,7 @@ import java.util.Collections;
 import java.util.List;
 
 import org.apache.hadoop.hdfs.protocol.Block;
+import org.apache.hadoop.hdfs.server.blockmanagement.BlockInfo;
 import org.apache.hadoop.hdfs.server.blockmanagement.BlockInfoContiguous;
 import org.apache.hadoop.hdfs.server.blockmanagement.BlockInfoContiguousUnderConstruction;
 import org.apache.hadoop.hdfs.server.common.HdfsServerConstants;
@@ -131,7 +132,7 @@ public class FileDiffList extends
       break;
     }
     // Check if last block is part of truncate recovery
-    BlockInfoContiguous lastBlock = file.getLastBlock();
+    BlockInfo lastBlock = file.getLastBlock();
     Block dontRemoveBlock = null;
     if (lastBlock != null && lastBlock.getBlockUCState().equals(
         HdfsServerConstants.BlockUCState.UNDER_RECOVERY)) {

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestDecommission.java

@@ -48,7 +48,7 @@ import org.apache.hadoop.hdfs.protocol.ExtendedBlock;
 import org.apache.hadoop.hdfs.protocol.HdfsConstants.DatanodeReportType;
 import org.apache.hadoop.hdfs.protocol.LocatedBlock;
 import org.apache.hadoop.hdfs.protocol.LocatedBlocks;
-import org.apache.hadoop.hdfs.server.blockmanagement.BlockInfoContiguous;
+import org.apache.hadoop.hdfs.server.blockmanagement.BlockInfo;
 import org.apache.hadoop.hdfs.server.blockmanagement.BlockManager;
 import org.apache.hadoop.hdfs.server.blockmanagement.BlockManagerTestUtil;
 import org.apache.hadoop.hdfs.server.blockmanagement.DatanodeDescriptor;
@@ -671,8 +671,7 @@ public class TestDecommission {
       GenericTestUtils.waitFor(new Supplier<Boolean>() {
         @Override
         public Boolean get() {
-          BlockInfoContiguous info =
-              blockManager.getStoredBlock(b.getLocalBlock());
+          BlockInfo info = blockManager.getStoredBlock(b.getLocalBlock());
           int count = 0;
           StringBuilder sb = new StringBuilder("Replica locations: ");
           for (int i = 0; i < info.numNodes(); i++) {

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestAddStripedBlocks.java

@@ -265,9 +265,9 @@ public class TestAddStripedBlocks {
       ReplicaBeingWritten replica = new ReplicaBeingWritten(block, null, null,
           null);
       blocks.add(replica);
-      BlockListAsLongs bll = new BlockListAsLongs(null, blocks);
+      BlockListAsLongs bll = BlockListAsLongs.encode(blocks);
       StorageBlockReport[] reports = {new StorageBlockReport(storage,
-          bll.getBlockListAsLongs())};
+          bll)};
       cluster.getNameNodeRpc().blockReport(dn.getDNRegistrationForBP(bpId),
           bpId, reports);
     }