diff --git a/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt b/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
index d106509f359..8aad41d8a8b 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
+++ b/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
@@ -463,6 +463,9 @@ Release 2.0.3-alpha - Unreleased
     HDFS-4344. dfshealth.jsp throws NumberFormatException when
     dfs.hosts/dfs.hosts.exclude includes port number. (Andy Isaacson via atm)
 
+    HDFS-4468.  Use the new StringUtils methods added by HADOOP-9252 and fix
+    TestHDFSCLI and TestQuota. (szetszwo)
+
   BREAKDOWN OF HDFS-3077 SUBTASKS
 
     HDFS-3077. Quorum-based protocol for reading and writing edit logs.
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSUtil.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSUtil.java
index 9564c543285..613f8defd17 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSUtil.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSUtil.java
@@ -923,6 +923,11 @@ public class DFSUtil {
     return capacity <= 0 ? 0 : (remaining * 100.0f)/capacity; 
   }
 
+  /** Convert percentage to a string. */
+  public static String percent2String(double percentage) {
+    return StringUtils.format("%.2f%%", percentage);
+  }
+
   /**
    * Round bytes to GiB (gibibyte)
    * @param bytes number of bytes
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/protocol/DSQuotaExceededException.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/protocol/DSQuotaExceededException.java
index c7b22f7ac24..481c1305e8a 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/protocol/DSQuotaExceededException.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/protocol/DSQuotaExceededException.java
@@ -20,7 +20,7 @@ package org.apache.hadoop.hdfs.protocol;
 
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
-import org.apache.hadoop.util.StringUtils;
+import static org.apache.hadoop.util.StringUtils.TraditionalBinaryPrefix.long2String;
 
 @InterfaceAudience.Private
 @InterfaceStability.Evolving
@@ -41,9 +41,9 @@ public class DSQuotaExceededException extends QuotaExceededException {
   public String getMessage() {
     String msg = super.getMessage();
     if (msg == null) {
-      return "The DiskSpace quota" + (pathName==null?"":(" of " + pathName)) + 
-          " is exceeded: quota=" + StringUtils.humanReadableInt(quota) + 
-          " diskspace consumed=" + StringUtils.humanReadableInt(count);
+      return "The DiskSpace quota" + (pathName==null?"": " of " + pathName)
+          + " is exceeded: quota = " + quota + " B = " + long2String(quota, "B", 2)
+          + " but diskspace consumed = " + count + " B = " + long2String(count, "B", 2);
     } else {
       return msg;
     }
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/protocol/DatanodeInfo.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/protocol/DatanodeInfo.java
index c62faea14a1..797c9a49f5e 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/protocol/DatanodeInfo.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/protocol/DatanodeInfo.java
@@ -17,10 +17,13 @@
  */
 package org.apache.hadoop.hdfs.protocol;
 
+import static org.apache.hadoop.hdfs.DFSUtil.percent2String;
+
 import java.util.Date;
 
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
+import org.apache.hadoop.hdfs.DFSConfigKeys;
 import org.apache.hadoop.hdfs.DFSUtil;
 import org.apache.hadoop.net.NetUtils;
 import org.apache.hadoop.net.NetworkTopology;
@@ -242,8 +245,8 @@ public class DatanodeInfo extends DatanodeID implements Node {
     buffer.append("DFS Used: "+u+" ("+StringUtils.byteDesc(u)+")"+"\n");
     buffer.append("Non DFS Used: "+nonDFSUsed+" ("+StringUtils.byteDesc(nonDFSUsed)+")"+"\n");
     buffer.append("DFS Remaining: " +r+ " ("+StringUtils.byteDesc(r)+")"+"\n");
-    buffer.append("DFS Used%: "+StringUtils.limitDecimalTo2(usedPercent)+"%\n");
-    buffer.append("DFS Remaining%: "+StringUtils.limitDecimalTo2(remainingPercent)+"%\n");
+    buffer.append("DFS Used%: "+percent2String(usedPercent) + "\n");
+    buffer.append("DFS Remaining%: "+percent2String(remainingPercent) + "\n");
     buffer.append("Last contact: "+new Date(lastUpdate)+"\n");
     return buffer.toString();
   }
@@ -267,7 +270,7 @@ public class DatanodeInfo extends DatanodeID implements Node {
     }
     buffer.append(" " + c + "(" + StringUtils.byteDesc(c)+")");
     buffer.append(" " + u + "(" + StringUtils.byteDesc(u)+")");
-    buffer.append(" " + StringUtils.limitDecimalTo2(((1.0*u)/c)*100)+"%");
+    buffer.append(" " + percent2String(u/(double)c));
     buffer.append(" " + r + "(" + StringUtils.byteDesc(r)+")");
     buffer.append(" " + new Date(lastUpdate));
     return buffer.toString();
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/ClusterJspHelper.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/ClusterJspHelper.java
index 1b3db818d15..0f0a989f8c9 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/ClusterJspHelper.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/ClusterJspHelper.java
@@ -569,12 +569,10 @@ class ClusterJspHelper {
       toXmlItemBlock(doc, "DFS Remaining", StringUtils.byteDesc(free));
     
       // dfsUsedPercent
-      toXmlItemBlock(doc, "DFS Used%", 
-          StringUtils.limitDecimalTo2(dfsUsedPercent)+ "%");
+      toXmlItemBlock(doc, "DFS Used%", DFSUtil.percent2String(dfsUsedPercent));
     
       // dfsRemainingPercent
-      toXmlItemBlock(doc, "DFS Remaining%",
-          StringUtils.limitDecimalTo2(dfsRemainingPercent) + "%");
+      toXmlItemBlock(doc, "DFS Remaining%", DFSUtil.percent2String(dfsRemainingPercent));
     
       doc.endTag(); // storage
     
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/NamenodeJspHelper.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/NamenodeJspHelper.java
index c6abb6faddd..9c9a1cc8fa5 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/NamenodeJspHelper.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/NamenodeJspHelper.java
@@ -17,6 +17,8 @@
  */
 package org.apache.hadoop.hdfs.server.namenode;
 
+import static org.apache.hadoop.hdfs.DFSUtil.percent2String;
+
 import java.io.IOException;
 import java.lang.management.ManagementFactory;
 import java.lang.management.MemoryMXBean;
@@ -64,6 +66,14 @@ import org.znerd.xmlenc.XMLOutputter;
 import com.google.common.base.Preconditions;
 
 class NamenodeJspHelper {
+  static String fraction2String(double value) {
+    return StringUtils.format("%.2f", value);
+  }
+
+  static String fraction2String(long numerator, long denominator) {
+    return fraction2String(numerator/(double)denominator);
+  }
+
   static String getSafeModeText(FSNamesystem fsn) {
     if (!fsn.isInSafeMode())
       return "";
@@ -361,20 +371,20 @@ class NamenodeJspHelper {
           + "DFS Remaining" + colTxt() + ":" + colTxt()
           + StringUtils.byteDesc(remaining) + rowTxt() + colTxt() + "DFS Used%"
           + colTxt() + ":" + colTxt()
-          + StringUtils.limitDecimalTo2(percentUsed) + " %" + rowTxt()
+          + percent2String(percentUsed) + rowTxt()
           + colTxt() + "DFS Remaining%" + colTxt() + ":" + colTxt()
-          + StringUtils.limitDecimalTo2(percentRemaining) + " %"
+          + percent2String(percentRemaining)
           + rowTxt() + colTxt() + "Block Pool Used" + colTxt() + ":" + colTxt()
           + StringUtils.byteDesc(bpUsed) + rowTxt()
           + colTxt() + "Block Pool Used%"+ colTxt() + ":" + colTxt()
-          + StringUtils.limitDecimalTo2(percentBpUsed) + " %" 
+          + percent2String(percentBpUsed) 
           + rowTxt() + colTxt() + "DataNodes usages" + colTxt() + ":" + colTxt()
           + "Min %" + colTxt() + "Median %" + colTxt() + "Max %" + colTxt()
           + "stdev %" + rowTxt() + colTxt() + colTxt() + colTxt()
-          + StringUtils.limitDecimalTo2(min) + " %"
-          + colTxt() + StringUtils.limitDecimalTo2(median) + " %"
-          + colTxt() + StringUtils.limitDecimalTo2(max) + " %"
-          + colTxt() + StringUtils.limitDecimalTo2(dev) + " %"
+          + percent2String(min)
+          + colTxt() + percent2String(median)
+          + colTxt() + percent2String(max)
+          + colTxt() + percent2String(dev)
           + rowTxt() + colTxt()
           + "<a href=\"dfsnodelist.jsp?whatNodes=LIVE\">Live Nodes</a> "
           + colTxt() + ":" + colTxt() + live.size()
@@ -562,9 +572,9 @@ class NamenodeJspHelper {
       long u = d.getDfsUsed();
       long nu = d.getNonDfsUsed();
       long r = d.getRemaining();
-      String percentUsed = StringUtils.limitDecimalTo2(d.getDfsUsedPercent());
-      String percentRemaining = StringUtils.limitDecimalTo2(d
-          .getRemainingPercent());
+      final double percentUsedValue = d.getDfsUsedPercent();
+      String percentUsed = fraction2String(percentUsedValue);
+      String percentRemaining = fraction2String(d.getRemainingPercent());
 
       String adminState = d.getAdminState().toString();
 
@@ -572,32 +582,30 @@ class NamenodeJspHelper {
       long currentTime = Time.now();
       
       long bpUsed = d.getBlockPoolUsed();
-      String percentBpUsed = StringUtils.limitDecimalTo2(d
-          .getBlockPoolUsedPercent());
+      String percentBpUsed = fraction2String(d.getBlockPoolUsedPercent());
 
       out.print("<td class=\"lastcontact\"> "
           + ((currentTime - timestamp) / 1000)
           + "<td class=\"adminstate\">"
           + adminState
           + "<td align=\"right\" class=\"capacity\">"
-          + StringUtils.limitDecimalTo2(c * 1.0 / diskBytes)
+          + fraction2String(c, diskBytes)
           + "<td align=\"right\" class=\"used\">"
-          + StringUtils.limitDecimalTo2(u * 1.0 / diskBytes)
+          + fraction2String(u, diskBytes)
           + "<td align=\"right\" class=\"nondfsused\">"
-          + StringUtils.limitDecimalTo2(nu * 1.0 / diskBytes)
+          + fraction2String(nu, diskBytes)
           + "<td align=\"right\" class=\"remaining\">"
-          + StringUtils.limitDecimalTo2(r * 1.0 / diskBytes)
+          + fraction2String(r, diskBytes)
           + "<td align=\"right\" class=\"pcused\">"
           + percentUsed
           + "<td class=\"pcused\">"
-          + ServletUtil.percentageGraph((int) Double.parseDouble(percentUsed),
-              100) 
+          + ServletUtil.percentageGraph((int)percentUsedValue, 100) 
           + "<td align=\"right\" class=\"pcremaining\">"
           + percentRemaining 
           + "<td title=" + "\"blocks scheduled : "
           + d.getBlocksScheduled() + "\" class=\"blocks\">" + d.numBlocks()+"\n"
           + "<td align=\"right\" class=\"bpused\">"
-          + StringUtils.limitDecimalTo2(bpUsed * 1.0 / diskBytes)
+          + fraction2String(bpUsed, diskBytes)
           + "<td align=\"right\" class=\"pcbpused\">"
           + percentBpUsed
           + "<td align=\"right\" class=\"volfails\">"
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/tools/DFSAdmin.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/tools/DFSAdmin.java
index b3c9309054d..7db2b5614ad 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/tools/DFSAdmin.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/tools/DFSAdmin.java
@@ -316,8 +316,7 @@ public class DFSAdmin extends FsShell {
       System.out.println("DFS Used: " + used
                          + " (" + StringUtils.byteDesc(used) + ")");
       System.out.println("DFS Used%: "
-                         + StringUtils.limitDecimalTo2(((1.0 * used) / presentCapacity) * 100)
-                         + "%");
+          + StringUtils.formatPercent(used/(double)presentCapacity, 2));
       
       /* These counts are not always upto date. They are updated after  
        * iteration of an internal list. Should be updated in a few seconds to 
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestQuota.java b/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestQuota.java
index f6e09283224..a1886130816 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestQuota.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestQuota.java
@@ -68,8 +68,8 @@ public class TestQuota {
       throw new DSQuotaExceededException(bytes, bytes);
     } catch(DSQuotaExceededException e) {
       
-      assertEquals("The DiskSpace quota is exceeded: quota=1.0k " +
-          "diskspace consumed=1.0k", e.getMessage());
+      assertEquals("The DiskSpace quota is exceeded: quota = 1024 B = 1 KB"
+          + " but diskspace consumed = 1024 B = 1 KB", e.getMessage());
     }
   }
   
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/test/resources/testHDFSConf.xml b/hadoop-hdfs-project/hadoop-hdfs/src/test/resources/testHDFSConf.xml
index 23498564749..a71b3fedb9f 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/test/resources/testHDFSConf.xml
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/test/resources/testHDFSConf.xml
@@ -1182,7 +1182,7 @@
         </comparator>
         <comparator>
           <type>RegexpComparator</type>
-          <expected-output>^1\.0k\s+hdfs:///dir0/data1k</expected-output>
+          <expected-output>^1\.0 K\s+hdfs:///dir0/data1k</expected-output>
         </comparator>
       </comparators>
     </test>
@@ -15590,7 +15590,7 @@
       <comparators>
         <comparator>
           <type>RegexpComparator</type>
-          <expected-output>put: The DiskSpace quota of /dir1 is exceeded: quota=1.0k diskspace consumed=[0-9.]+[kmg]*</expected-output>
+          <expected-output>put: The DiskSpace quota of /dir1 is exceeded: quota = 1024 B = 1 KB but diskspace consumed = [0-9]+ B = [0-9.]+ [KMG]B*</expected-output>
         </comparator>
       </comparators>
     </test>