diff --git a/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt b/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
index 9514f326a6..3b2b5cea6f 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
+++ b/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
@@ -355,6 +355,8 @@ Release 2.6.0 - UNRELEASED
     HDFS-6788. Improve synchronization in BPOfferService with read write lock.
     (Yongjun Zhang via wang)
 
+    HDFS-6787. Remove duplicate code in FSDirectory#unprotectedConcat. (Yi Liu via umamahesh)
+
   OPTIMIZATIONS
 
     HDFS-6690. Deduplicate xattr names in memory. (wang)
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSDirectory.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSDirectory.java
index 4604a9a3df..b0e4f669fb 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSDirectory.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSDirectory.java
@@ -1081,9 +1081,6 @@ void unprotectedConcat(String target, String [] srcs, long timestamp)
       count++;
     }
     
-    // update inodeMap
-    removeFromInodeMap(Arrays.asList(allSrcInodes));
-    
     trgInode.setModificationTime(timestamp, trgLatestSnapshot);
     trgParent.updateModificationTime(timestamp, trgLatestSnapshot);
     // update quota on the parent directory ('count' files removed, 0 space)