diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DataNode.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DataNode.java
index ee7f6e3a4c..633befbb5b 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DataNode.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DataNode.java
@@ -3529,7 +3529,7 @@ public String getDiskBalancerStatus() {
     try {
       return getDiskBalancer().queryWorkStatus().toJsonString();
     } catch (IOException ex) {
-      LOG.debug("Reading diskbalancer Status failed. ex:{}", ex);
+      LOG.debug("Reading diskbalancer Status failed.", ex);
       return "";
     }
   }