diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/DatanodeAdminManager.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/DatanodeAdminManager.java
index 4cd97344d73..359a9166e7a 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/DatanodeAdminManager.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/DatanodeAdminManager.java
@@ -186,7 +186,7 @@ void activate(Configuration conf) {
 
     monitor = new Monitor(blocksPerInterval, 
         nodesPerInterval, maxConcurrentTrackedNodes);
-    executor.scheduleAtFixedRate(monitor, intervalSecs, intervalSecs,
+    executor.scheduleWithFixedDelay(monitor, intervalSecs, intervalSecs,
         TimeUnit.SECONDS);
 
     LOG.debug("Activating DatanodeAdminManager with interval {} seconds, " +