diff --git a/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt b/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
index 56e1502a85..6817533e26 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
+++ b/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
@@ -124,6 +124,8 @@ Trunk (unreleased changes)
 
     HDFS-3235. MiniDFSClusterManager doesn't correctly support -format option.
     (Henry Robinson via atm)
+
+    HDFS-3243. TestParallelRead timing out on jenkins. (Henry Robinson via todd)
     
 Release 2.0.0 - UNRELEASED 
 
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestParallelReadUtil.java b/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestParallelReadUtil.java
index 0a0fc67343..8e218d637a 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestParallelReadUtil.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestParallelReadUtil.java
@@ -179,7 +179,7 @@ public class TestParallelReadUtil {
    */
   static class ReadWorker extends Thread {
 
-    static public final int N_ITERATIONS = 1024 * 4;
+    static public final int N_ITERATIONS = 1024;
 
     private static final double PROPORTION_NON_POSITIONAL_READ = 0.10;