diff --git a/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt b/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
index 1f6b8874ec..0c0cbb25d3 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
+++ b/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
@@ -317,6 +317,9 @@ Release 2.5.0 - UNRELEASED
     HDFS-6180. dead node count / listing is very broken in JMX and old GUI.
     (wheat9)
 
+    HDFS-6143. WebHdfsFileSystem open should throw FileNotFoundException for
+    non-existing paths. (Gera Shegalov via wheat9)
+
 Release 2.4.1 - UNRELEASED
 
   INCOMPATIBLE CHANGES
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/web/ByteRangeInputStream.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/web/ByteRangeInputStream.java
index fd274b778a..395c9f6088 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/web/ByteRangeInputStream.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/web/ByteRangeInputStream.java
@@ -83,9 +83,10 @@ enum StreamStatus {
    * @param o Original url
    * @param r Resolved url
    */
-  public ByteRangeInputStream(URLOpener o, URLOpener r) {
+  public ByteRangeInputStream(URLOpener o, URLOpener r) throws IOException {
     this.originalURL = o;
     this.resolvedURL = r;
+    getInputStream();
   }
 
   protected abstract URL getResolvedUrl(final HttpURLConnection connection
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/web/WebHdfsFileSystem.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/web/WebHdfsFileSystem.java
index f836d4d052..bdf744a6d5 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/web/WebHdfsFileSystem.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/web/WebHdfsFileSystem.java
@@ -962,7 +962,8 @@ static URL removeOffsetParam(final URL url) throws MalformedURLException {
   }
 
   static class OffsetUrlInputStream extends ByteRangeInputStream {
-    OffsetUrlInputStream(OffsetUrlOpener o, OffsetUrlOpener r) {
+    OffsetUrlInputStream(OffsetUrlOpener o, OffsetUrlOpener r)
+        throws IOException {
       super(o, r);
     }
 
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/web/TestWebHdfsFileSystemContract.java b/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/web/TestWebHdfsFileSystemContract.java
index 867886148f..09f025c65a 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/web/TestWebHdfsFileSystemContract.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/web/TestWebHdfsFileSystemContract.java
@@ -182,9 +182,8 @@ public void testOpenNonExistFile() throws IOException {
     final Path p = new Path("/test/testOpenNonExistFile");
     //open it as a file, should get FileNotFoundException 
     try {
-      final FSDataInputStream in = fs.open(p);
-      in.read();
-      fail();
+      fs.open(p);
+      fail("Expected FileNotFoundException was not thrown");
     } catch(FileNotFoundException fnfe) {
       WebHdfsFileSystem.LOG.info("This is expected.", fnfe);
     }