diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/tools/DiskBalancerCLI.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/tools/DiskBalancerCLI.java
index 00e6f0499a..34bd68bc68 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/tools/DiskBalancerCLI.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/tools/DiskBalancerCLI.java
@@ -172,7 +172,9 @@ public static void main(String[] argv) throws Exception {
     try {
       res = ToolRunner.run(shell, argv);
     } catch (Exception ex) {
-      LOG.error(ex.toString());
+      String msg = String.format("Exception thrown while running %s.",
+          DiskBalancerCLI.class.getSimpleName());
+      LOG.error(msg, ex);
       res = 1;
     }
     System.exit(res);