diff --git a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/InstrumentedLock.java b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/InstrumentedLock.java
index 0520271c9b..2c1f591a1f 100644
--- a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/InstrumentedLock.java
+++ b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/InstrumentedLock.java
@@ -25,9 +25,9 @@
 
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
-import org.apache.commons.logging.Log;
 
 import com.google.common.annotations.VisibleForTesting;
+import org.slf4j.Logger;
 
 /**
  * This is a debugging class that can be used by callers to track
@@ -44,7 +44,7 @@
 public class InstrumentedLock implements Lock {
 
   private final Lock lock;
-  private final Log logger;
+  private final Logger logger;
   private final String name;
   private final Timer clock;
 
@@ -70,20 +70,20 @@ public class InstrumentedLock implements Lock {
    * @param lockWarningThresholdMs the time threshold to view lock held
    *                               time as being "too long"
    */
-  public InstrumentedLock(String name, Log logger, long minLoggingGapMs,
-      long lockWarningThresholdMs) {
+  public InstrumentedLock(String name, Logger logger, long minLoggingGapMs,
+                          long lockWarningThresholdMs) {
     this(name, logger, new ReentrantLock(),
         minLoggingGapMs, lockWarningThresholdMs);
   }
 
-  public InstrumentedLock(String name, Log logger, Lock lock,
+  public InstrumentedLock(String name, Logger logger, Lock lock,
       long minLoggingGapMs, long lockWarningThresholdMs) {
     this(name, logger, lock,
         minLoggingGapMs, lockWarningThresholdMs, new Timer());
   }
 
   @VisibleForTesting
-  InstrumentedLock(String name, Log logger, Lock lock,
+  InstrumentedLock(String name, Logger logger, Lock lock,
       long minLoggingGapMs, long lockWarningThresholdMs, Timer clock) {
     this.name = name;
     this.lock = lock;
diff --git a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/InstrumentedReadLock.java b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/InstrumentedReadLock.java
index 09fd43ec69..e115718478 100644
--- a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/InstrumentedReadLock.java
+++ b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/InstrumentedReadLock.java
@@ -19,11 +19,11 @@
 
 import java.util.concurrent.locks.ReentrantReadWriteLock;
 
-import org.apache.commons.logging.Log;
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
 
 import com.google.common.annotations.VisibleForTesting;
+import org.slf4j.Logger;
 
 /**
  * This is a wrap class of a <tt>ReadLock</tt>.
@@ -51,7 +51,7 @@ protected Long initialValue() {
     };
   };
 
-  public InstrumentedReadLock(String name, Log logger,
+  public InstrumentedReadLock(String name, Logger logger,
       ReentrantReadWriteLock readWriteLock,
       long minLoggingGapMs, long lockWarningThresholdMs) {
     this(name, logger, readWriteLock, minLoggingGapMs, lockWarningThresholdMs,
@@ -59,7 +59,7 @@ public InstrumentedReadLock(String name, Log logger,
   }
 
   @VisibleForTesting
-  InstrumentedReadLock(String name, Log logger,
+  InstrumentedReadLock(String name, Logger logger,
       ReentrantReadWriteLock readWriteLock,
       long minLoggingGapMs, long lockWarningThresholdMs, Timer clock) {
     super(name, logger, readWriteLock.readLock(), minLoggingGapMs,
diff --git a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/InstrumentedReadWriteLock.java b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/InstrumentedReadWriteLock.java
index 62e6b09981..a410524076 100644
--- a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/InstrumentedReadWriteLock.java
+++ b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/InstrumentedReadWriteLock.java
@@ -21,9 +21,9 @@
 import java.util.concurrent.locks.ReadWriteLock;
 import java.util.concurrent.locks.ReentrantReadWriteLock;
 
-import org.apache.commons.logging.Log;
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
+import org.slf4j.Logger;
 
 /**
  * This is a wrap class of a {@link ReentrantReadWriteLock}.
@@ -37,7 +37,7 @@ public class InstrumentedReadWriteLock implements ReadWriteLock {
   private final Lock readLock;
   private final Lock writeLock;
 
-  InstrumentedReadWriteLock(boolean fair, String name, Log logger,
+  InstrumentedReadWriteLock(boolean fair, String name, Logger logger,
       long minLoggingGapMs, long lockWarningThresholdMs) {
     ReentrantReadWriteLock readWriteLock = new ReentrantReadWriteLock(fair);
     readLock = new InstrumentedReadLock(name, logger, readWriteLock,
diff --git a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/InstrumentedWriteLock.java b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/InstrumentedWriteLock.java
index 9208c1b356..6842166930 100644
--- a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/InstrumentedWriteLock.java
+++ b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/InstrumentedWriteLock.java
@@ -19,11 +19,11 @@
 
 import java.util.concurrent.locks.ReentrantReadWriteLock;
 
-import org.apache.commons.logging.Log;
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
 
 import com.google.common.annotations.VisibleForTesting;
+import org.slf4j.Logger;
 
 /**
  * This is a wrap class of a <tt>WriteLock</tt>.
@@ -37,7 +37,7 @@
 @InterfaceStability.Unstable
 public class InstrumentedWriteLock extends InstrumentedLock {
 
-  public InstrumentedWriteLock(String name, Log logger,
+  public InstrumentedWriteLock(String name, Logger logger,
       ReentrantReadWriteLock readWriteLock,
       long minLoggingGapMs, long lockWarningThresholdMs) {
     this(name, logger, readWriteLock, minLoggingGapMs, lockWarningThresholdMs,
@@ -45,7 +45,7 @@ public InstrumentedWriteLock(String name, Log logger,
   }
 
   @VisibleForTesting
-  InstrumentedWriteLock(String name, Log logger,
+  InstrumentedWriteLock(String name, Logger logger,
       ReentrantReadWriteLock readWriteLock,
       long minLoggingGapMs, long lockWarningThresholdMs, Timer clock) {
     super(name, logger, readWriteLock.writeLock(), minLoggingGapMs,
diff --git a/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/util/TestInstrumentedLock.java b/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/util/TestInstrumentedLock.java
index d3f69122d6..44158ec5b0 100644
--- a/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/util/TestInstrumentedLock.java
+++ b/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/util/TestInstrumentedLock.java
@@ -21,8 +21,8 @@
 import java.util.concurrent.atomic.AtomicReference;
 import java.util.concurrent.locks.Lock;
 
-import org.apache.commons.logging.Log;
-import org.apache.commons.logging.LogFactory;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.TestName;
@@ -34,7 +34,7 @@
  */
 public class TestInstrumentedLock {
 
-  static final Log LOG = LogFactory.getLog(TestInstrumentedLock.class);
+  static final Logger LOG = LoggerFactory.getLogger(TestInstrumentedLock.class);
 
   @Rule public TestName name = new TestName();
 
diff --git a/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/util/TestInstrumentedReadWriteLock.java b/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/util/TestInstrumentedReadWriteLock.java
index eeefa88073..3e1a88bd0a 100644
--- a/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/util/TestInstrumentedReadWriteLock.java
+++ b/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/util/TestInstrumentedReadWriteLock.java
@@ -24,18 +24,19 @@
 import java.util.concurrent.atomic.AtomicLong;
 import java.util.concurrent.locks.ReentrantReadWriteLock;
 
-import org.apache.commons.logging.Log;
-import org.apache.commons.logging.LogFactory;
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.TestName;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 /**
  * A test class for InstrumentedReadLock and InstrumentedWriteLock.
  */
 public class TestInstrumentedReadWriteLock {
 
-  static final Log LOG = LogFactory.getLog(TestInstrumentedReadWriteLock.class);
+  static final Logger LOG = LoggerFactory.getLogger(
+          TestInstrumentedReadWriteLock.class);
 
   @Rule
   public TestName name = new TestName();
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/BlockPoolSlice.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/BlockPoolSlice.java
index c17ef36627..6b1ee3d5c3 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/BlockPoolSlice.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/BlockPoolSlice.java
@@ -740,7 +740,8 @@ private long validateIntegrityAndSetLength(File blockFile, long genStamp) {
         }
       }
     } catch (IOException e) {
-      FsDatasetImpl.LOG.warn(e);
+      FsDatasetImpl.LOG.warn("Getting exception while validating integrity " +
+              "and setting length for blockFile", e);
       return 0;
     }
   }
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/FsDatasetImpl.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/FsDatasetImpl.java
index 11835a53fb..1e159cd49d 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/FsDatasetImpl.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/FsDatasetImpl.java
@@ -46,8 +46,6 @@
 import javax.management.StandardMBean;
 
 import com.google.common.annotations.VisibleForTesting;
-import org.apache.commons.logging.Log;
-import org.apache.commons.logging.LogFactory;
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.CommonConfigurationKeys;
@@ -119,6 +117,8 @@
 import com.google.common.base.Preconditions;
 import com.google.common.collect.Lists;
 import com.google.common.collect.Sets;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 /**************************************************
  * FSDataset manages a set of data blocks.  Each block
@@ -127,7 +127,7 @@
  ***************************************************/
 @InterfaceAudience.Private
 class FsDatasetImpl implements FsDatasetSpi<FsVolumeImpl> {
-  static final Log LOG = LogFactory.getLog(FsDatasetImpl.class);
+  static final Logger LOG = LoggerFactory.getLogger(FsDatasetImpl.class);
   private final static boolean isNativeIOAvailable;
   private Timer timer;
   static {