HDFS-14730. Removed unused configuration dfs.web.authentication.filter.

             Contributed by Chen Zhang

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSConfigKeys.java

@@ -283,13 +283,6 @@ public class DFSConfigKeys extends CommonConfigurationKeys {
       = "dfs.namenode.blockreport.queue.size";
   public static final int    DFS_NAMENODE_BLOCKREPORT_QUEUE_SIZE_DEFAULT
       = 1024;
-  public static final String  DFS_WEBHDFS_AUTHENTICATION_FILTER_KEY = "dfs.web.authentication.filter";
-  /* Phrased as below to avoid javac inlining as a constant, to match the behavior when
-     this was AuthFilter.class.getName(). Note that if you change the import for AuthFilter, you
-     need to update the literal here as well as TestDFSConfigKeys.
-   */
-  public static final String  DFS_WEBHDFS_AUTHENTICATION_FILTER_DEFAULT =
-      "org.apache.hadoop.hdfs.web.AuthFilter";
   @Deprecated
   public static final String  DFS_WEBHDFS_USER_PATTERN_KEY =
       HdfsClientConfigKeys.DFS_WEBHDFS_USER_PATTERN_KEY;

hadoop-hdfs-project/hadoop-hdfs/src/main/resources/hdfs-default.xml

@@ -5042,14 +5042,6 @@
   </description>
 </property>
 
-<property>
-  <name>dfs.web.authentication.filter</name>
-  <value>org.apache.hadoop.hdfs.web.AuthFilter</value>
-  <description>
-    Authentication filter class used for WebHDFS.
-  </description>
-</property>
-
 <property>
   <name>dfs.web.authentication.simple.anonymous.allowed</name>
   <value></value>

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestDFSConfigKeys.java

@@ -1,37 +0,0 @@
-/**
- * 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;
-
-import org.apache.hadoop.hdfs.web.AuthFilter;
-
-import org.junit.Assert;
-import org.junit.Test;
-
-public class TestDFSConfigKeys {
-
-  /**
-   * Make sure we keep the String literal up to date with what we'd get by calling
-   * class.getName.
-   */
-  @Test
-  public void testStringLiteralDefaultWebFilter() {
-    Assert.assertEquals("The default webhdfs auth filter should make the FQCN of AuthFilter.",
-        AuthFilter.class.getName(), DFSConfigKeys.DFS_WEBHDFS_AUTHENTICATION_FILTER_DEFAULT);
-  }
- 
-}