diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/BPOfferService.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/BPOfferService.java
index 8b893fa0f0..3c63160f28 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/BPOfferService.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/BPOfferService.java
@@ -378,7 +378,7 @@ void verifyAndSetNamespaceInfo(BPServiceActor actor, NamespaceInfo nsInfo)
 
     if(nsInfo.getState() == HAServiceState.ACTIVE
         && bpServiceToActive == null) {
-      LOG.info("Acknowledging ACTIVE Namenode during handshake" + actor);
+      LOG.info("Acknowledging ACTIVE Namenode during handshake {}", actor);
       bpServiceToActive = actor;
     }