diff --git a/hadoop-mapreduce-project/CHANGES.txt b/hadoop-mapreduce-project/CHANGES.txt
index 3917acae28..5f75d6f0c0 100644
--- a/hadoop-mapreduce-project/CHANGES.txt
+++ b/hadoop-mapreduce-project/CHANGES.txt
@@ -52,6 +52,9 @@ Trunk (unreleased changes)
     MAPREDUCE-2944. Improve checking of input for JobClient.displayTasks() (XieXianshan via harsh)
 
   BUG FIXES
+    MAPREDUCE-3462. Fix Gridmix JUnit testcase failures. 
+                    (Ravi Prakash and Ravi Gummadi via amarrk)
+
     MAPREDUCE-3349. Log rack-name in JobHistory for unsuccessful tasks. 
                     (Devaraj K and Amar Kamat via amarrk)
 
diff --git a/hadoop-mapreduce-project/src/contrib/gridmix/src/test/org/apache/hadoop/mapred/gridmix/TestCompressionEmulationUtils.java b/hadoop-mapreduce-project/src/contrib/gridmix/src/test/org/apache/hadoop/mapred/gridmix/TestCompressionEmulationUtils.java
index d1c1b9881d..51071a07a0 100644
--- a/hadoop-mapreduce-project/src/contrib/gridmix/src/test/org/apache/hadoop/mapred/gridmix/TestCompressionEmulationUtils.java
+++ b/hadoop-mapreduce-project/src/contrib/gridmix/src/test/org/apache/hadoop/mapred/gridmix/TestCompressionEmulationUtils.java
@@ -105,6 +105,7 @@ public void testRandomCompressedTextDataGenerator() throws Exception {
     conf.setInt(RandomTextDataGenerator.GRIDMIX_DATAGEN_RANDOMTEXT_WORDSIZE, 
                 wordSize);
     conf.setLong(GenerateData.GRIDMIX_GEN_BYTES, dataSize);
+    conf.set("mapreduce.job.hdfs-servers", "");
     
     FileSystem lfs = FileSystem.getLocal(conf);
     
@@ -192,6 +193,7 @@ private void testCompressionRatioConfigure(float ratio)
     CompressionEmulationUtil.setInputCompressionEmulationEnabled(conf, true);
     
     conf.setLong(GenerateData.GRIDMIX_GEN_BYTES, dataSize);
+    conf.set("mapreduce.job.hdfs-servers", "");
     
     float expectedRatio = CompressionEmulationUtil.DEFAULT_COMPRESSION_RATIO;
     if (ratio > 0) {
diff --git a/hadoop-mapreduce-project/src/contrib/gridmix/src/test/org/apache/hadoop/mapred/gridmix/TestDistCacheEmulation.java b/hadoop-mapreduce-project/src/contrib/gridmix/src/test/org/apache/hadoop/mapred/gridmix/TestDistCacheEmulation.java
index 163cc8073b..0f1c7e2f71 100644
--- a/hadoop-mapreduce-project/src/contrib/gridmix/src/test/org/apache/hadoop/mapred/gridmix/TestDistCacheEmulation.java
+++ b/hadoop-mapreduce-project/src/contrib/gridmix/src/test/org/apache/hadoop/mapred/gridmix/TestDistCacheEmulation.java
@@ -141,6 +141,7 @@ private long[] configureDummyDistCacheFiles(Configuration conf,
       boolean useOldProperties) throws IOException {
     String user = UserGroupInformation.getCurrentUser().getShortUserName();
     conf.set(MRJobConfig.USER_NAME, user);
+    conf.set("mapreduce.job.hdfs-servers", "");
     // Set some dummy dist cache files in gridmix configuration so that they go
     // into the configuration of JobStory objects.
     String[] distCacheFiles = {"hdfs:///tmp/file1.txt",
diff --git a/hadoop-mapreduce-project/src/contrib/gridmix/src/test/org/apache/hadoop/mapred/gridmix/TestGridmixSubmission.java b/hadoop-mapreduce-project/src/contrib/gridmix/src/test/org/apache/hadoop/mapred/gridmix/TestGridmixSubmission.java
index 2815f248e3..802745522f 100644
--- a/hadoop-mapreduce-project/src/contrib/gridmix/src/test/org/apache/hadoop/mapred/gridmix/TestGridmixSubmission.java
+++ b/hadoop-mapreduce-project/src/contrib/gridmix/src/test/org/apache/hadoop/mapred/gridmix/TestGridmixSubmission.java
@@ -521,6 +521,7 @@ private void doSubmission(boolean useDefaultQueue,
       DebugGridmix client = new DebugGridmix();
       conf = new Configuration();
       conf.setEnum(GridmixJobSubmissionPolicy.JOB_SUBMISSION_POLICY,policy);
+      conf.set("mapreduce.job.hdfs-servers", "");
       if (useDefaultQueue) {
         conf.setBoolean(GridmixJob.GRIDMIX_USE_QUEUE_IN_TRACE, false);
         conf.set(GridmixJob.GRIDMIX_DEFAULT_QUEUE, "q1");
diff --git a/hadoop-mapreduce-project/src/contrib/gridmix/src/test/org/apache/hadoop/mapred/gridmix/TestSleepJob.java b/hadoop-mapreduce-project/src/contrib/gridmix/src/test/org/apache/hadoop/mapred/gridmix/TestSleepJob.java
index cf39710bd8..84f292e770 100644
--- a/hadoop-mapreduce-project/src/contrib/gridmix/src/test/org/apache/hadoop/mapred/gridmix/TestSleepJob.java
+++ b/hadoop-mapreduce-project/src/contrib/gridmix/src/test/org/apache/hadoop/mapred/gridmix/TestSleepJob.java
@@ -205,6 +205,7 @@ public void testMapTasksOnlySleepJobs()
       throws Exception {
     Configuration conf = new Configuration();
     conf.setBoolean(SleepJob.SLEEPJOB_MAPTASK_ONLY, true);
+    conf.set("mapreduce.job.hdfs-servers", "");
     DebugJobProducer jobProducer = new DebugJobProducer(5, conf);
     JobConf jconf = GridmixTestUtils.mrCluster.createJobConf(new JobConf(conf));
     UserGroupInformation ugi = UserGroupInformation.getLoginUser();
@@ -253,6 +254,7 @@ private void doSubmission(String...optional) throws Exception {
       DebugGridmix client = new DebugGridmix();
       conf = new Configuration();
       conf.setEnum(GridmixJobSubmissionPolicy.JOB_SUBMISSION_POLICY, policy);
+      conf.set("mapreduce.job.hdfs-servers", "");
       conf = GridmixTestUtils.mrCluster.createJobConf(new JobConf(conf));
       // allow synthetic users to create home directories
       GridmixTestUtils.dfs.mkdirs(root, new FsPermission((short) 0777));