diff --git a/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/hdfs/NNBench.java b/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/hdfs/NNBench.java
index ee3cc00fd1f..29eac43d66a 100644
--- a/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/hdfs/NNBench.java
+++ b/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/hdfs/NNBench.java
@@ -868,7 +868,10 @@ public class NNBench extends Configured implements Tool {
           try {
             // Set up timer for measuring AL
             startTimeAL = System.currentTimeMillis();
-            filesystem.rename(filePath, filePathR);
+            boolean result = filesystem.rename(filePath, filePathR);
+            if (!result) {
+              throw new IOException("rename failed for " + filePath);
+            }
             totalTimeAL1 += (System.currentTimeMillis() - startTimeAL);
             
             successfulOp = true;
@@ -901,7 +904,10 @@ public class NNBench extends Configured implements Tool {
           try {
             // Set up timer for measuring AL
             startTimeAL = System.currentTimeMillis();
-            filesystem.delete(filePath, true);
+            boolean result = filesystem.delete(filePath, true);
+            if (!result) {
+              throw new IOException("delete failed for " + filePath);
+            }
             totalTimeAL1 += (System.currentTimeMillis() - startTimeAL);
             
             successfulOp = true;