diff --git a/hadoop-common-project/hadoop-common/CHANGES.txt b/hadoop-common-project/hadoop-common/CHANGES.txt
index 6fd5c4be0f..e66610b04d 100644
--- a/hadoop-common-project/hadoop-common/CHANGES.txt
+++ b/hadoop-common-project/hadoop-common/CHANGES.txt
@@ -375,6 +375,9 @@ Release 2.3.0 - UNRELEASED
     HADOOP-10064. Upgrade to maven antrun plugin version 1.7 (Arpit Agarwal via
     jeagles)
 
+    HADOOP-9594. Update apache commons math dependency (Timothy St. Clair via
+    stevel)
+
   OPTIMIZATIONS
 
     HADOOP-9748. Reduce blocking on UGI.ensureInitialized (daryn)
diff --git a/hadoop-common-project/hadoop-common/pom.xml b/hadoop-common-project/hadoop-common/pom.xml
index 939ce20094..6c81e30bd5 100644
--- a/hadoop-common-project/hadoop-common/pom.xml
+++ b/hadoop-common-project/hadoop-common/pom.xml
@@ -55,7 +55,7 @@
     </dependency>
     <dependency>
       <groupId>org.apache.commons</groupId>
-      <artifactId>commons-math</artifactId>
+      <artifactId>commons-math3</artifactId>
       <scope>compile</scope>
     </dependency>
     <dependency>
diff --git a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics2/impl/MetricsSystemImpl.java b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics2/impl/MetricsSystemImpl.java
index 259d329c4b..e386ce608f 100644
--- a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics2/impl/MetricsSystemImpl.java
+++ b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics2/impl/MetricsSystemImpl.java
@@ -38,7 +38,7 @@
 import org.apache.commons.configuration.PropertiesConfiguration;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
-import org.apache.commons.math.util.MathUtils;
+import org.apache.commons.math3.util.ArithmeticUtils;
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.metrics2.MetricsInfo;
 import org.apache.hadoop.metrics2.MetricsCollector;
@@ -457,7 +457,7 @@ private synchronized void configureSinks() {
       MetricsConfig conf = entry.getValue();
       int sinkPeriod = conf.getInt(PERIOD_KEY, PERIOD_DEFAULT);
       confPeriod = confPeriod == 0 ? sinkPeriod
-                                   : MathUtils.gcd(confPeriod, sinkPeriod);
+                                   : ArithmeticUtils.gcd(confPeriod, sinkPeriod);
       String clsName = conf.getClassName("");
       if (clsName == null) continue;  // sink can be registered later on
       String sinkName = entry.getKey();
diff --git a/hadoop-project/pom.xml b/hadoop-project/pom.xml
index a531e543bf..5a1e3f8359 100644
--- a/hadoop-project/pom.xml
+++ b/hadoop-project/pom.xml
@@ -324,8 +324,8 @@
       </dependency>
       <dependency>
         <groupId>org.apache.commons</groupId>
-        <artifactId>commons-math</artifactId>
-        <version>2.1</version>
+        <artifactId>commons-math3</artifactId>
+        <version>3.1.1</version>
       </dependency>
       <dependency>
         <groupId>org.apache.commons</groupId>