diff --git a/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt b/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
index b1d5ec4a550..f9801944da1 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
+++ b/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
@@ -126,6 +126,8 @@ Release 2.7.0 - UNRELEASED
     HDFS-7263. Snapshot read can reveal future bytes for appended files.
     (Tao Luo via shv)
 
+    HDFS-7315. DFSTestUtil.readFileBuffer opens extra FSDataInputStream.
+    (Plamen Jeliazkov via wheat9)
 
 Release 2.6.0 - UNRELEASED
 
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/DFSTestUtil.java b/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/DFSTestUtil.java
index c728b2ba846..31ef8b2c824 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/DFSTestUtil.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/DFSTestUtil.java
@@ -271,7 +271,7 @@ public class DFSTestUtil {
     try {
       FSDataInputStream in = fs.open(fileName);
       try {
-        IOUtils.copyBytes(fs.open(fileName), os, 1024, true);
+        IOUtils.copyBytes(in, os, 1024, true);
         return os.toByteArray();
       } finally {
         in.close();