HDDS-850. ReadStateMachineData hits OverlappingFileLockException in ContainerStateMachine. Contributed by Shashikant Banerjee.

hadoop-hdds/common/src/main/java/org/apache/hadoop/hdds/scm/ScmConfigKeys.java

@@ -93,6 +93,14 @@ public final class ScmConfigKeys {
   public static final String DFS_CONTAINER_RATIS_LOG_QUEUE_SIZE =
       "dfs.container.ratis.log.queue.size";
   public static final int DFS_CONTAINER_RATIS_LOG_QUEUE_SIZE_DEFAULT = 128;
+
+  // expiry interval stateMachineData cache entry inside containerStateMachine
+  public static final String
+      DFS_CONTAINER_RATIS_STATEMACHINEDATA_CACHE_EXPIRY_INTERVAL =
+      "dfs.container.ratis.statemachine.cache.expiry.interval";
+  public static final String
+      DFS_CONTAINER_RATIS_STATEMACHINEDATA_CACHE_EXPIRY_INTERVAL_DEFAULT =
+      "10s";
   public static final String DFS_RATIS_CLIENT_REQUEST_TIMEOUT_DURATION_KEY =
       "dfs.ratis.client.request.timeout.duration";
   public static final TimeDuration

hadoop-hdds/common/src/main/java/org/apache/hadoop/ozone/OzoneConfigKeys.java

@@ -249,6 +249,15 @@ public final class OzoneConfigKeys {
       DFS_CONTAINER_RATIS_STATEMACHINEDATA_SYNC_TIMEOUT_DEFAULT =
       ScmConfigKeys.DFS_CONTAINER_RATIS_STATEMACHINEDATA_SYNC_TIMEOUT_DEFAULT;
 
+  public static final String
+      DFS_CONTAINER_RATIS_STATEMACHINEDATA_CACHE_EXPIRY_INTERVAL =
+      ScmConfigKeys.
+          DFS_CONTAINER_RATIS_STATEMACHINEDATA_CACHE_EXPIRY_INTERVAL;
+  public static final String
+      DFS_CONTAINER_RATIS_STATEMACHINEDATA_CACHE_EXPIRY_INTERVAL_DEFAULT =
+      ScmConfigKeys.
+          DFS_CONTAINER_RATIS_STATEMACHINEDATA_CACHE_EXPIRY_INTERVAL_DEFAULT;
+
   public static final String DFS_CONTAINER_RATIS_DATANODE_STORAGE_DIR =
       "dfs.container.ratis.datanode.storage.dir";
   public static final String DFS_RATIS_CLIENT_REQUEST_TIMEOUT_DURATION_KEY =

hadoop-hdds/common/src/main/proto/DatanodeContainerProtocol.proto

@@ -392,6 +392,7 @@ message  WriteChunkResponseProto {
 message  ReadChunkRequestProto  {
   required DatanodeBlockID blockID = 1;
   required ChunkInfo chunkData = 2;
+  optional bool readFromTmpFile = 3 [default = false];
 }
 
 message  ReadChunkResponseProto {

hadoop-hdds/common/src/main/resources/ozone-default.xml

@@ -189,6 +189,14 @@
       used by Apache Ratis on datanodes.(128 MB by default)
     </description>
   </property>
+  <property>
+    <name>dfs.container.ratis.statemachine.cache.expiry.interval</name>
+    <value>10s</value>
+    <tag>OZONE, RATIS, PERFORMANCE</tag>
+    <description>The interval till which the stateMachine data in ratis
+      will be cached inside the ContainerStateMachine.
+    </description>
+  </property>
   <property>
     <name>dfs.ratis.client.request.timeout.duration</name>
     <value>3s</value>

hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/common/transport/server/ratis/ContainerStateMachine.java

@@ -19,6 +19,8 @@
 package org.apache.hadoop.ozone.container.common.transport.server.ratis;
 
 import com.google.common.base.Preconditions;
+import com.google.common.cache.Cache;
+import com.google.common.cache.CacheBuilder;
 import org.apache.hadoop.hdds.HddsUtils;
 import org.apache.hadoop.hdds.protocol.datanode.proto.ContainerProtos;
 import org.apache.hadoop.ozone.container.common.helpers.BlockData;
@@ -27,6 +29,7 @@
 import org.apache.ratis.protocol.RaftGroupId;
 import org.apache.ratis.server.RaftServer;
 import org.apache.ratis.server.impl.RaftServerConstants;
+import org.apache.ratis.server.impl.RaftServerProxy;
 import org.apache.ratis.server.protocol.TermIndex;
 import org.apache.ratis.statemachine.impl.SingleFileSnapshotInfo;
 import org.apache.ratis.thirdparty.com.google.protobuf
@@ -60,12 +63,16 @@
 
 import java.io.File;
 import java.io.IOException;
+import java.util.Collection;
 import java.util.List;
 import java.util.Map;
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.ThreadPoolExecutor;
 import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Callable;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.ExecutionException;
 import java.util.stream.Collectors;
 
 /** A {@link org.apache.ratis.statemachine.StateMachine} for containers.
@@ -116,12 +123,11 @@ public class ContainerStateMachine extends BaseStateMachine {
   private final XceiverServerRatis ratisServer;
   private final ConcurrentHashMap<Long, CompletableFuture<Message>>
       writeChunkFutureMap;
-  private final ConcurrentHashMap<Long, CompletableFuture<Message>>
-      createContainerFutureMap;
   private ExecutorService[] executors;
   private final int numExecutors;
   private final Map<Long, Long> applyTransactionCompletionMap;
   private long lastIndex;
+  private final Cache<Long, ByteString> stateMachineDataCache;
   /**
    * CSM metrics.
    */
@@ -129,7 +135,7 @@ public class ContainerStateMachine extends BaseStateMachine {
 
   public ContainerStateMachine(RaftGroupId gid, ContainerDispatcher dispatcher,
       ThreadPoolExecutor chunkExecutor, XceiverServerRatis ratisServer,
-      List<ExecutorService> executors) {
+      List<ExecutorService> executors, long expiryInterval) {
     this.gid = gid;
     this.dispatcher = dispatcher;
     this.chunkExecutor = chunkExecutor;
@@ -138,9 +144,13 @@ public ContainerStateMachine(RaftGroupId gid, ContainerDispatcher dispatcher,
     this.numExecutors = executors.size();
     this.executors = executors.toArray(new ExecutorService[numExecutors]);
     this.writeChunkFutureMap = new ConcurrentHashMap<>();
-    this.createContainerFutureMap = new ConcurrentHashMap<>();
     applyTransactionCompletionMap = new ConcurrentHashMap<>();
     this.lastIndex = RaftServerConstants.INVALID_LOG_INDEX;
+    stateMachineDataCache = CacheBuilder.newBuilder()
+        .expireAfterAccess(expiryInterval, TimeUnit.MILLISECONDS)
+        // set the limit on no of cached entries equal to no of max threads
+        // executing writeStateMachineData
+        .maximumSize(chunkExecutor.getCorePoolSize()).build();
   }
 
   @Override
@@ -257,14 +267,6 @@ public TransactionContext startTransaction(RaftClientRequest request)
           .setStateMachineData(dataContainerCommandProto.toByteString())
           .setLogData(commitContainerCommandProto.toByteString())
           .build();
-    } else if (proto.getCmdType() == Type.CreateContainer) {
-      return TransactionContext.newBuilder()
-          .setClientRequest(request)
-          .setStateMachine(this)
-          .setServerRole(RaftPeerRole.LEADER)
-          .setStateMachineData(request.getMessage().getContent())
-          .setLogData(request.getMessage().getContent())
-          .build();
     } else {
       return TransactionContext.newBuilder()
           .setClientRequest(request)
@@ -310,17 +312,17 @@ private ExecutorService getCommandExecutor(
   private CompletableFuture<Message> handleWriteChunk(
       ContainerCommandRequestProto requestProto, long entryIndex) {
     final WriteChunkRequestProto write = requestProto.getWriteChunk();
-    long containerID = write.getBlockID().getContainerID();
+    RaftServer server = ratisServer.getServer();
-    CompletableFuture<Message> future =
+    Preconditions.checkState(server instanceof RaftServerProxy);
-        createContainerFutureMap.get(containerID);
+    try {
-    CompletableFuture<Message> writeChunkFuture;
+      if (((RaftServerProxy) server).getImpl(gid).isLeader()) {
-    if (future != null) {
+        stateMachineDataCache.put(entryIndex, write.getData());
-      writeChunkFuture = future.thenApplyAsync(
+      }
-          v -> runCommand(requestProto), chunkExecutor);
+    } catch (IOException ioe) {
-    } else {
+      return completeExceptionally(ioe);
-      writeChunkFuture = CompletableFuture.supplyAsync(
-          () -> runCommand(requestProto), chunkExecutor);
     }
+    CompletableFuture<Message> writeChunkFuture = CompletableFuture
+        .supplyAsync(() -> runCommand(requestProto), chunkExecutor);
     writeChunkFutureMap.put(entryIndex, writeChunkFuture);
     LOG.debug("writeChunk writeStateMachineData : blockId " + write.getBlockID()
         + " logIndex " + entryIndex + " chunkName " + write.getChunkData()
@@ -337,14 +339,6 @@ private CompletableFuture<Message> handleWriteChunk(
     return writeChunkFuture;
   }
 
-  private CompletableFuture<Message> handleCreateContainer(
-      ContainerCommandRequestProto requestProto) {
-    long containerID = requestProto.getContainerID();
-    createContainerFutureMap.
-        computeIfAbsent(containerID, k -> new CompletableFuture<>());
-    return CompletableFuture.completedFuture(() -> ByteString.EMPTY);
-  }
-
   /*
    * writeStateMachineData calls are not synchronized with each other
    * and also with applyTransaction.
@@ -356,9 +350,10 @@ public CompletableFuture<Message> writeStateMachineData(LogEntryProto entry) {
       final ContainerCommandRequestProto requestProto =
           getRequestProto(getStateMachineData(entry.getStateMachineLogEntry()));
       Type cmdType = requestProto.getCmdType();
+
+      // For only writeChunk, there will be writeStateMachineData call.
+      // CreateContainer will happen as a part of writeChunk only.
       switch (cmdType) {
-      case CreateContainer:
-        return handleCreateContainer(requestProto);
       case WriteChunk:
         return handleWriteChunk(requestProto, entry.getIndex());
       default:
@@ -397,7 +392,10 @@ private ByteString readStateMachineData(ContainerCommandRequestProto
     ReadChunkRequestProto.Builder readChunkRequestProto =
         ReadChunkRequestProto.newBuilder()
             .setBlockID(writeChunkRequestProto.getBlockID())
-            .setChunkData(writeChunkRequestProto.getChunkData());
+            .setChunkData(writeChunkRequestProto.getChunkData())
+            // set readFromTempFile to true in case, the chunkFile does
+            // not exist as applyTransaction is not executed for this entry yet.
+            .setReadFromTmpFile(true);
     ContainerCommandRequestProto dataContainerCommandProto =
         ContainerCommandRequestProto.newBuilder(requestProto)
             .setCmdType(Type.ReadChunk)
@@ -409,15 +407,39 @@ private ByteString readStateMachineData(ContainerCommandRequestProto
         dispatchCommand(dataContainerCommandProto);
     ReadChunkResponseProto responseProto = response.getReadChunk();
 
+    ByteString data = responseProto.getData();
     // assert that the response has data in it.
-    Preconditions.checkNotNull(responseProto.getData());
+    Preconditions.checkNotNull(data);
+    return data;
+  }
 
+  /**
+   * Reads the Entry from the Cache or loads it back by reading from disk.
+   */
+  private ByteString getCachedStateMachineData(Long logIndex,
+      ContainerCommandRequestProto requestProto) throws ExecutionException {
+    try {
+      return reconstructWriteChunkRequest(
+          stateMachineDataCache.get(logIndex, new Callable<ByteString>() {
+            @Override
+            public ByteString call() throws Exception {
+              return readStateMachineData(requestProto);
+            }
+          }), requestProto);
+    } catch (ExecutionException e) {
+      throw e;
+    }
+  }
+
+  private ByteString reconstructWriteChunkRequest(ByteString data,
+      ContainerCommandRequestProto requestProto) {
+    WriteChunkRequestProto writeChunkRequestProto =
+        requestProto.getWriteChunk();
     // reconstruct the write chunk request
     final WriteChunkRequestProto.Builder dataWriteChunkProto =
         WriteChunkRequestProto.newBuilder(writeChunkRequestProto)
             // adding the state machine data
-            .setData(responseProto.getData())
+            .setData(data).setStage(Stage.WRITE_DATA);
-            .setStage(Stage.WRITE_DATA);
 
     ContainerCommandRequestProto.Builder newStateMachineProto =
         ContainerCommandRequestProto.newBuilder(requestProto)
@@ -455,18 +477,21 @@ public CompletableFuture<ByteString> readStateMachineData(
     if (!getStateMachineData(smLogEntryProto).isEmpty()) {
       return CompletableFuture.completedFuture(ByteString.EMPTY);
     }
-
     try {
       final ContainerCommandRequestProto requestProto =
           getRequestProto(entry.getStateMachineLogEntry().getLogData());
       // readStateMachineData should only be called for "write" to Ratis.
       Preconditions.checkArgument(!HddsUtils.isReadOnly(requestProto));
-
       if (requestProto.getCmdType() == Type.WriteChunk) {
-        return CompletableFuture.supplyAsync(() ->
+        CompletableFuture<ByteString> future = new CompletableFuture<>();
-                readStateMachineData(requestProto), chunkExecutor);
+        return future.supplyAsync(() -> {
-      } else if (requestProto.getCmdType() == Type.CreateContainer) {
+          try {
-        return CompletableFuture.completedFuture(requestProto.toByteString());
+            return getCachedStateMachineData(entry.getIndex(), requestProto);
+          } catch (ExecutionException e) {
+            future.completeExceptionally(e);
+            return null;
+          }
+        }, chunkExecutor);
       } else {
         throw new IllegalStateException("Cmd type:" + requestProto.getCmdType()
             + " cannot have state machine data");
@@ -559,19 +584,6 @@ public CompletableFuture<Message> applyTransaction(TransactionContext trx) {
         future = CompletableFuture.supplyAsync(() -> runCommand(requestProto),
             getCommandExecutor(requestProto));
       }
-      // Mark the createContainerFuture complete so that writeStateMachineData
-      // for WriteChunk gets unblocked
-      if (cmdType == Type.CreateContainer) {
-        long containerID = requestProto.getContainerID();
-        future.thenApply(
-            r -> {
-              createContainerFutureMap.remove(containerID).complete(null);
-              LOG.info("create Container Transaction completed for container " +
-                  containerID + " log index " + index);
-              return r;
-            });
-      }
-
       lastIndex = index;
       future.thenAccept(m -> {
         final Long previous =
@@ -593,6 +605,11 @@ private static <T> CompletableFuture<T> completeExceptionally(Exception e) {
     return future;
   }
 
+  private void evictStateMachineCache() {
+    stateMachineDataCache.invalidateAll();
+    stateMachineDataCache.cleanUp();
+  }
+
   @Override
   public void notifySlowness(RaftGroup group, RoleInfoProto roleInfoProto) {
     ratisServer.handleNodeSlowness(group, roleInfoProto);
@@ -604,7 +621,14 @@ public void notifyExtendedNoLeader(RaftGroup group,
     ratisServer.handleNoLeader(group, roleInfoProto);
   }
 
+  @Override
+  public void notifyNotLeader(Collection<TransactionContext> pendingEntries)
+      throws IOException {
+    evictStateMachineCache();
+  }
+
   @Override
   public void close() throws IOException {
+    evictStateMachineCache();
   }
 }

hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/common/transport/server/ratis/XceiverServerRatis.java

@@ -105,6 +105,8 @@ private static long nextCallId() {
   private final StateContext context;
   private final ReplicationLevel replicationLevel;
   private long nodeFailureTimeoutMs;
+  private final long cacheEntryExpiryInteval;
+
 
   private XceiverServerRatis(DatanodeDetails dd, int port,
       ContainerDispatcher dispatcher, Configuration conf, StateContext context)
@@ -128,6 +130,11 @@ private XceiverServerRatis(DatanodeDetails dd, int port,
         conf.getEnum(OzoneConfigKeys.DFS_CONTAINER_RATIS_REPLICATION_LEVEL_KEY,
             OzoneConfigKeys.DFS_CONTAINER_RATIS_REPLICATION_LEVEL_DEFAULT);
     this.executors = new ArrayList<>();
+    cacheEntryExpiryInteval = conf.getTimeDuration(OzoneConfigKeys.
+            DFS_CONTAINER_RATIS_STATEMACHINEDATA_CACHE_EXPIRY_INTERVAL,
+        OzoneConfigKeys.
+            DFS_CONTAINER_RATIS_STATEMACHINEDATA_CACHE_EXPIRY_INTERVAL_DEFAULT,
+        TimeUnit.MILLISECONDS);
     this.dispatcher = dispatcher;
     for (int i = 0; i < numContainerOpExecutors; i++) {
       executors.add(Executors.newSingleThreadExecutor());
@@ -141,8 +148,8 @@ private XceiverServerRatis(DatanodeDetails dd, int port,
   }
 
   private ContainerStateMachine getStateMachine(RaftGroupId gid) {
-    return new ContainerStateMachine(gid, dispatcher, chunkExecutor,
+    return new ContainerStateMachine(gid, dispatcher, chunkExecutor, this,
-            this, Collections.unmodifiableList(executors));
+        Collections.unmodifiableList(executors), cacheEntryExpiryInteval);
   }
 
   private RaftProperties newRaftProperties(Configuration conf) {
@@ -304,6 +311,9 @@ private RaftProperties newRaftProperties(Configuration conf) {
     RaftServerConfigKeys.Log.StateMachineData.setSyncTimeoutRetry(properties,
         numSyncRetries);
 
+    // Enable the StateMachineCaching
+    RaftServerConfigKeys.Log.StateMachineData
+        .setCachingEnabled(properties, true);
     return properties;
   }
 

hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/keyvalue/KeyValueHandler.java

@@ -531,7 +531,8 @@ ContainerCommandResponseProto handleReadChunk(
           .getChunkData());
       Preconditions.checkNotNull(chunkInfo);
 
-      data = chunkManager.readChunk(kvContainer, blockID, chunkInfo);
+      data = chunkManager.readChunk(kvContainer, blockID, chunkInfo,
+          request.getReadChunk().getReadFromTmpFile());
       metrics.incContainerBytesStats(Type.ReadChunk, data.length);
     } catch (StorageContainerException ex) {
       return ContainerUtils.logAndReturnError(LOG, ex, request);
@@ -702,8 +703,10 @@ ContainerCommandResponseProto handleGetSmallFile(
       ContainerProtos.ChunkInfo chunkInfo = null;
       ByteString dataBuf = ByteString.EMPTY;
       for (ContainerProtos.ChunkInfo chunk : responseData.getChunks()) {
+        // if the block is committed, all chunks must have been committed.
+        // Tmp chunk files won't exist here.
         byte[] data = chunkManager.readChunk(kvContainer, blockID,
-            ChunkInfo.getFromProtoBuf(chunk));
+            ChunkInfo.getFromProtoBuf(chunk), false);
         ByteString current = ByteString.copyFrom(data);
         dataBuf = dataBuf.concat(current);
         chunkInfo = chunk;

hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/keyvalue/impl/ChunkManagerImpl.java

@@ -173,13 +173,14 @@ public void writeChunk(Container container, BlockID blockID, ChunkInfo info,
    * @param container - Container for the chunk
    * @param blockID - ID of the block.
    * @param info - ChunkInfo.
+   * @param readFromTmpFile whether to read from tmp chunk file or not.
    * @return byte array
    * @throws StorageContainerException
    * TODO: Right now we do not support partial reads and writes of chunks.
    * TODO: Explore if we need to do that for ozone.
    */
-  public byte[] readChunk(Container container, BlockID blockID, ChunkInfo info)
+  public byte[] readChunk(Container container, BlockID blockID, ChunkInfo info,
-      throws StorageContainerException {
+      boolean readFromTmpFile) throws StorageContainerException {
     try {
       KeyValueContainerData containerData = (KeyValueContainerData) container
           .getContainerData();
@@ -194,6 +195,12 @@ public byte[] readChunk(Container container, BlockID blockID, ChunkInfo info)
       if (containerData.getLayOutVersion() == ChunkLayOutVersion
           .getLatestVersion().getVersion()) {
         File chunkFile = ChunkUtils.getChunkFile(containerData, info);
+
+        // In case the chunk file does not exist but tmp chunk file exist,
+        // read from tmp chunk file if readFromTmpFile is set to true
+        if (!chunkFile.exists() && readFromTmpFile) {
+          chunkFile = getTmpChunkFile(chunkFile, info);
+        }
         data = ChunkUtils.readData(chunkFile, info, volumeIOStats);
         containerData.incrReadCount();
         long length = chunkFile.length();

hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/keyvalue/interfaces/ChunkManager.java

@@ -51,14 +51,15 @@ void writeChunk(Container container, BlockID blockID, ChunkInfo info,
    * @param container - Container for the chunk
    * @param blockID - ID of the block.
    * @param info - ChunkInfo.
+   * @param readFromTmpFile whether to read from tmp chunk file or not
    * @return  byte array
    * @throws StorageContainerException
    *
    * TODO: Right now we do not support partial reads and writes of chunks.
    * TODO: Explore if we need to do that for ozone.
    */
-  byte[] readChunk(Container container, BlockID blockID, ChunkInfo info) throws
+  byte[] readChunk(Container container, BlockID blockID, ChunkInfo info,
-      StorageContainerException;
+      boolean readFromTmpFile) throws StorageContainerException;
 
   /**
    * Deletes a given chunk.

hadoop-hdds/container-service/src/test/java/org/apache/hadoop/ozone/container/keyvalue/TestChunkManagerImpl.java

@@ -189,7 +189,7 @@ public void testReadChunk() throws Exception {
     checkWriteIOStats(data.length, 1);
     checkReadIOStats(0, 0);
     byte[] expectedData = chunkManager.readChunk(keyValueContainer, blockID,
-        chunkInfo);
+        chunkInfo, false);
     assertEquals(expectedData.length, data.length);
     assertTrue(Arrays.equals(expectedData, data));
     checkReadIOStats(data.length, 1);
@@ -226,7 +226,7 @@ public void testReadChunkFileNotExists() throws Exception {
     try {
       // trying to read a chunk, where chunk file does not exist
       byte[] expectedData = chunkManager.readChunk(keyValueContainer, blockID,
-          chunkInfo);
+          chunkInfo, false);
       fail("testReadChunkFileNotExists failed");
     } catch (StorageContainerException ex) {
       GenericTestUtils.assertExceptionContains("Unable to find the chunk " +
@@ -249,7 +249,7 @@ public void testWriteAndReadChunkMultipleTimes() throws Exception {
     for (int i=0; i<100; i++) {
       chunkInfo = new ChunkInfo(String.format("%d.data.%d", blockID
           .getLocalID(), i), 0, data.length);
-      chunkManager.readChunk(keyValueContainer, blockID, chunkInfo);
+      chunkManager.readChunk(keyValueContainer, blockID, chunkInfo, false);
     }
     checkReadIOStats(data.length*100, 100);
     assertTrue(hddsVolume.getVolumeIOStats().getReadTime() > 0);

hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/ozone/container/common/impl/TestContainerPersistence.java

@@ -406,7 +406,7 @@ public void testWritReadManyChunks() throws IOException {
       for (int x = 0; x < chunkCount; x++) {
         String fileName = String.format("%s.data.%d", blockID.getLocalID(), x);
         ChunkInfo info = fileHashMap.get(fileName);
-        byte[] data = chunkManager.readChunk(container, blockID, info);
+        byte[] data = chunkManager.readChunk(container, blockID, info, false);
         ChecksumData checksumData = checksum.computeChecksum(data);
         Assert.assertEquals(info.getChecksumData(), checksumData);
       }
@@ -435,11 +435,11 @@ public void testPartialRead() throws Exception {
     chunkManager.writeChunk(container, blockID, info, ByteBuffer.wrap(data),
         COMBINED);
 
-    byte[] readData = chunkManager.readChunk(container, blockID, info);
+    byte[] readData = chunkManager.readChunk(container, blockID, info, false);
     assertTrue(Arrays.equals(data, readData));
 
     ChunkInfo info2 = getChunk(blockID.getLocalID(), 0, start, length);
-    byte[] readData2 = chunkManager.readChunk(container, blockID, info2);
+    byte[] readData2 = chunkManager.readChunk(container, blockID, info2, false);
     assertEquals(length, readData2.length);
     assertTrue(Arrays.equals(
         Arrays.copyOfRange(data, start, start + length), readData2));
@@ -513,7 +513,8 @@ public void testMultipleWriteSingleRead() throws IOException,
     // Request to read the whole data in a single go.
     ChunkInfo largeChunk = getChunk(blockID.getLocalID(), 0, 0,
         datalen * chunkCount);
-    byte[] newdata = chunkManager.readChunk(container, blockID, largeChunk);
+    byte[] newdata =
+        chunkManager.readChunk(container, blockID, largeChunk, false);
     MessageDigest newSha = MessageDigest.getInstance(OzoneConsts.FILE_HASH);
     newSha.update(newdata);
     Assert.assertEquals(Hex.encodeHexString(oldSha.digest()),
@@ -543,7 +544,7 @@ public void testDeleteChunk() throws IOException,
     chunkManager.deleteChunk(container, blockID, info);
     exception.expect(StorageContainerException.class);
     exception.expectMessage("Unable to find the chunk file.");
-    chunkManager.readChunk(container, blockID, info);
+    chunkManager.readChunk(container, blockID, info, false);
   }
 
   /**