diff --git a/master/src/main/scala/org/apache/celeborn/service/deploy/master/Master.scala b/master/src/main/scala/org/apache/celeborn/service/deploy/master/Master.scala
index 30fa65de49f..4e21d6d3ce1 100644
--- a/master/src/main/scala/org/apache/celeborn/service/deploy/master/Master.scala
+++ b/master/src/main/scala/org/apache/celeborn/service/deploy/master/Master.scala
@@ -702,8 +702,8 @@ private[celeborn] class Master(
           val fileStatus = iter.next()
           if (!statusSystem.appHeartbeatTime.containsKey(fileStatus.getPath.getName)) {
             logInfo(
-              s"Clean HDFS dir ${fileStatus.getPath.toString} using ${Utils.msDurationToString(
-                System.currentTimeMillis() - startTime)}")
+              s"Clean HDFS dir ${fileStatus.getPath.toString} costs 
+                ${Utils.msDurationToString(System.currentTimeMillis() - startTime)}")
             hadoopFs.delete(fileStatus.getPath, true)
           }
         }