diff --git a/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt b/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
index a16f0b703b..de8f452562 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
+++ b/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
@@ -514,6 +514,8 @@ Release 2.3.0 - UNRELEASED
     HDFS-5476. Snapshot: clean the blocks/files/directories under a renamed 
     file/directory while deletion. (jing9)
 
+    HDFS-5325. Remove WebHdfsFileSystem#ConnRunner. (Haohui Mai via jing9) 
+
 Release 2.2.1 - UNRELEASED
 
   INCOMPATIBLE CHANGES
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 9cab6885a1..9b623c056f 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
@@ -683,19 +683,6 @@ protected URLRunner(final HttpOpParam.Op op, final URL url, boolean redirected)
     }
   }
 
-  @VisibleForTesting
-  final class ConnRunner extends AbstractRunner {
-    protected ConnRunner(final HttpOpParam.Op op, HttpURLConnection conn) {
-      super(op, false);
-      this.conn = conn;
-    }
-
-    @Override
-    protected URL getUrl() {
-      return null;
-    }
-  }
-
   private FsPermission applyUMask(FsPermission permission) {
     if (permission == null) {
       permission = FsPermission.getDefault();
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/security/TestDelegationTokenForProxyUser.java b/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/security/TestDelegationTokenForProxyUser.java
index b13c81a156..a5a9521b0c 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/security/TestDelegationTokenForProxyUser.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/security/TestDelegationTokenForProxyUser.java
@@ -23,20 +23,14 @@
 import java.io.ByteArrayInputStream;
 import java.io.DataInputStream;
 import java.io.IOException;
-import java.net.HttpURLConnection;
 import java.net.InetAddress;
 import java.net.NetworkInterface;
-import java.net.URL;
 import java.security.PrivilegedExceptionAction;
 import java.util.ArrayList;
 import java.util.Enumeration;
-import java.util.Map;
-
-import javax.servlet.http.HttpServletResponse;
 
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
-import org.apache.commons.logging.impl.Log4JLogger;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.FSDataOutputStream;
 import org.apache.hadoop.fs.FileStatus;
@@ -47,23 +41,17 @@
 import org.apache.hadoop.hdfs.HdfsConfiguration;
 import org.apache.hadoop.hdfs.MiniDFSCluster;
 import org.apache.hadoop.hdfs.security.token.delegation.DelegationTokenIdentifier;
-import org.apache.hadoop.hdfs.server.namenode.web.resources.NamenodeWebHdfsMethods;
 import org.apache.hadoop.hdfs.web.WebHdfsFileSystem;
 import org.apache.hadoop.hdfs.web.WebHdfsTestUtil;
-import org.apache.hadoop.hdfs.web.resources.DoAsParam;
-import org.apache.hadoop.hdfs.web.resources.ExceptionHandler;
-import org.apache.hadoop.hdfs.web.resources.GetOpParam;
-import org.apache.hadoop.hdfs.web.resources.PostOpParam;
-import org.apache.hadoop.hdfs.web.resources.PutOpParam;
 import org.apache.hadoop.security.TestDoAsEffectiveUser;
 import org.apache.hadoop.security.UserGroupInformation;
 import org.apache.hadoop.security.authorize.ProxyUsers;
 import org.apache.hadoop.security.token.Token;
-import org.apache.log4j.Level;
 import org.junit.AfterClass;
 import org.junit.Assert;
 import org.junit.BeforeClass;
 import org.junit.Test;
+import org.mockito.internal.util.reflection.Whitebox;
 
 public class TestDelegationTokenForProxyUser {
   private static MiniDFSCluster cluster;
@@ -155,56 +143,26 @@ public Token<?>[] run() throws IOException {
     }
   }
   
-  @Test(timeout=20000)
+  @Test(timeout=5000)
   public void testWebHdfsDoAs() throws Exception {
     WebHdfsTestUtil.LOG.info("START: testWebHdfsDoAs()");
-    ((Log4JLogger)NamenodeWebHdfsMethods.LOG).getLogger().setLevel(Level.ALL);
-    ((Log4JLogger)ExceptionHandler.LOG).getLogger().setLevel(Level.ALL);
     WebHdfsTestUtil.LOG.info("ugi.getShortUserName()=" + ugi.getShortUserName());
     final WebHdfsFileSystem webhdfs = WebHdfsTestUtil.getWebHdfsFileSystemAs(ugi, config);
     
     final Path root = new Path("/");
     cluster.getFileSystem().setPermission(root, new FsPermission((short)0777));
 
-    {
-      //test GETHOMEDIRECTORY with doAs
-      final URL url = WebHdfsTestUtil.toUrl(webhdfs,
-          GetOpParam.Op.GETHOMEDIRECTORY,  root, new DoAsParam(PROXY_USER));
-      final HttpURLConnection conn = (HttpURLConnection) url.openConnection();
-      final Map<?, ?> m = WebHdfsTestUtil.connectAndGetJson(conn, HttpServletResponse.SC_OK);
-      conn.disconnect();
-  
-      final Object responsePath = m.get(Path.class.getSimpleName());
-      WebHdfsTestUtil.LOG.info("responsePath=" + responsePath);
-      Assert.assertEquals("/user/" + PROXY_USER, responsePath);
-    }
+    Whitebox.setInternalState(webhdfs, "ugi", proxyUgi);
 
     {
-      //test GETHOMEDIRECTORY with DOas
-      final URL url = WebHdfsTestUtil.toUrl(webhdfs,
-          GetOpParam.Op.GETHOMEDIRECTORY,  root, new DoAsParam(PROXY_USER) {
-            @Override
-            public String getName() {
-              return "DOas";
-            }
-      });
-      final HttpURLConnection conn = (HttpURLConnection) url.openConnection();
-      final Map<?, ?> m = WebHdfsTestUtil.connectAndGetJson(conn, HttpServletResponse.SC_OK);
-      conn.disconnect();
-  
-      final Object responsePath = m.get(Path.class.getSimpleName());
+      Path responsePath = webhdfs.getHomeDirectory();
       WebHdfsTestUtil.LOG.info("responsePath=" + responsePath);
-      Assert.assertEquals("/user/" + PROXY_USER, responsePath);
+      Assert.assertEquals(webhdfs.getUri() + "/user/" + PROXY_USER, responsePath.toString());
     }
 
     final Path f = new Path("/testWebHdfsDoAs/a.txt");
     {
-      //test create file with doAs
-      final PutOpParam.Op op = PutOpParam.Op.CREATE;
-      final URL url = WebHdfsTestUtil.toUrl(webhdfs, op,  f, new DoAsParam(PROXY_USER));
-      HttpURLConnection conn = (HttpURLConnection) url.openConnection();
-      conn = WebHdfsTestUtil.twoStepWrite(webhdfs, op, conn);
-      final FSDataOutputStream out = WebHdfsTestUtil.write(webhdfs, op, conn, 4096);
+      FSDataOutputStream out = webhdfs.create(f);
       out.write("Hello, webhdfs user!".getBytes());
       out.close();
   
@@ -214,12 +172,7 @@ public String getName() {
     }
 
     {
-      //test append file with doAs
-      final PostOpParam.Op op = PostOpParam.Op.APPEND;
-      final URL url = WebHdfsTestUtil.toUrl(webhdfs, op,  f, new DoAsParam(PROXY_USER));
-      HttpURLConnection conn = (HttpURLConnection) url.openConnection();
-      conn = WebHdfsTestUtil.twoStepWrite(webhdfs, op, conn);
-      final FSDataOutputStream out = WebHdfsTestUtil.write(webhdfs, op, conn, 4096);
+      final FSDataOutputStream out = webhdfs.append(f);
       out.write("\nHello again!".getBytes());
       out.close();
   
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/web/WebHdfsTestUtil.java b/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/web/WebHdfsTestUtil.java
index df87c6b584..9b512e0448 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/web/WebHdfsTestUtil.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/web/WebHdfsTestUtil.java
@@ -78,11 +78,6 @@ public static URL toUrl(final WebHdfsFileSystem webhdfs,
     Assert.assertEquals(expectedResponseCode, conn.getResponseCode());
     return WebHdfsFileSystem.jsonParse(conn, false);
   }
-  
-  public static HttpURLConnection twoStepWrite(final WebHdfsFileSystem webhdfs,
-      final HttpOpParam.Op op, HttpURLConnection conn) throws IOException {
-    return webhdfs.new ConnRunner(op, conn).twoStepWrite();
-  }
 
   public static FSDataOutputStream write(final WebHdfsFileSystem webhdfs,
       final HttpOpParam.Op op, final HttpURLConnection conn,