diff --git a/hadoop-common-project/hadoop-common/CHANGES.txt b/hadoop-common-project/hadoop-common/CHANGES.txt
index df740ea300a..ba491143e24 100644
--- a/hadoop-common-project/hadoop-common/CHANGES.txt
+++ b/hadoop-common-project/hadoop-common/CHANGES.txt
@@ -222,6 +222,9 @@ Release 2.0.0 - UNRELEASED
     HADOOP-8249. invalid hadoop-auth cookies should trigger authentication 
     if info is avail before returning HTTP 401 (tucu)
 
+    HADOOP-8261. Har file system doesn't deal with FS URIs with a host but no
+    port. (atm)
+
   BREAKDOWN OF HADOOP-7454 SUBTASKS
 
     HADOOP-7455. HA: Introduce HA Service Protocol Interface. (suresh)
diff --git a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/HarFileSystem.java b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/HarFileSystem.java
index e0fc4656bc9..9a5b28381c3 100644
--- a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/HarFileSystem.java
+++ b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/HarFileSystem.java
@@ -202,7 +202,8 @@ public class HarFileSystem extends FilterFileSystem {
     final String underLyingHost = i == host.length()? null: host.substring(i);
     int underLyingPort = rawURI.getPort();
     String auth = (underLyingHost == null && underLyingPort == -1)?
-                  null:(underLyingHost+":"+underLyingPort);
+                  null:(underLyingHost+
+                      (underLyingPort == -1 ? "" : ":"+underLyingPort));
     URI tmp = null;
     if (rawURI.getQuery() != null) {
       // query component not allowed
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/ha/TestHarFileSystemWithHA.java b/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/ha/TestHarFileSystemWithHA.java
new file mode 100644
index 00000000000..311f2602434
--- /dev/null
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/ha/TestHarFileSystemWithHA.java
@@ -0,0 +1,80 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.hadoop.hdfs.server.namenode.ha;
+
+import java.io.IOException;
+import java.io.OutputStream;
+import java.net.URI;
+
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.fs.FileSystem;
+import org.apache.hadoop.fs.HarFileSystem;
+import org.apache.hadoop.fs.Path;
+import org.apache.hadoop.hdfs.HdfsConfiguration;
+import org.apache.hadoop.hdfs.MiniDFSCluster;
+import org.apache.hadoop.hdfs.MiniDFSNNTopology;
+import org.junit.Test;
+
+public class TestHarFileSystemWithHA {
+  
+  private static final Path TEST_HAR_PATH = new Path("/input.har");
+
+  /**
+   * Test that the HarFileSystem works with underlying HDFS URIs that have no
+   * port specified, as is often the case with an HA setup.
+   */
+  @Test
+  public void testHarUriWithHaUriWithNoPort() throws Exception {
+    Configuration conf = new HdfsConfiguration();
+    MiniDFSCluster cluster = null;
+    try {
+      cluster = new MiniDFSCluster.Builder(conf)
+          .numDataNodes(1)
+          .nnTopology(MiniDFSNNTopology.simpleHATopology())
+          .build();
+      cluster.transitionToActive(0);
+      HATestUtil.setFailoverConfigurations(cluster, conf);
+      
+      createEmptyHarArchive(HATestUtil.configureFailoverFs(cluster, conf),
+          TEST_HAR_PATH);
+      
+      URI failoverUri = FileSystem.getDefaultUri(conf);
+      Path p = new Path("har://hdfs-" + failoverUri.getAuthority() + TEST_HAR_PATH);
+      p.getFileSystem(conf);
+    } finally {
+      cluster.shutdown();
+    }
+  }
+  
+  /**
+   * Create an empty Har archive in the FileSystem fs at the Path p.
+   * 
+   * @param fs the file system to create the Har archive in
+   * @param p the path to create the Har archive at
+   * @throws IOException in the event of error
+   */
+  private static void createEmptyHarArchive(FileSystem fs, Path p)
+      throws IOException {
+    fs.mkdirs(p);
+    OutputStream out = fs.create(new Path(p, "_masterindex"));
+    out.write(Integer.toString(HarFileSystem.VERSION).getBytes());
+    out.close();
+    fs.create(new Path(p, "_index")).close();
+  }
+  
+}