diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DiskBalancer.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DiskBalancer.java
index d57110469793d..e2f9877483156 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DiskBalancer.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DiskBalancer.java
@@ -383,7 +383,7 @@ public long getPlanValidityInterval() {
   }
 
   /**
-   * Gets maximum amount of time disk balancer plan is valid in config
+   * Gets maximum amount of time disk balancer plan is valid in config.
    *
    * @return the maximum amount of time in milliseconds.
    */