| /** |
| * 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; |
| |
| import java.io.IOException; |
| import java.io.PrintWriter; |
| import java.util.Map; |
| |
| import javax.servlet.ServletContext; |
| import javax.servlet.http.HttpServletRequest; |
| import javax.servlet.http.HttpServletResponse; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.hdfs.HdfsConfiguration; |
| import org.apache.hadoop.hdfs.protocol.FSConstants.DatanodeReportType; |
| import org.apache.hadoop.security.UnixUserGroupInformation; |
| import org.apache.hadoop.security.UserGroupInformation; |
| |
| /** |
| * This class is used in Namesystem's web server to do fsck on namenode. |
| */ |
| public class FsckServlet extends DfsServlet { |
| /** for java.io.Serializable */ |
| private static final long serialVersionUID = 1L; |
| |
| /** Handle fsck request */ |
| public void doGet(HttpServletRequest request, HttpServletResponse response |
| ) throws IOException { |
| @SuppressWarnings("unchecked") |
| final Map<String,String[]> pmap = request.getParameterMap(); |
| final PrintWriter out = response.getWriter(); |
| |
| final UnixUserGroupInformation ugi = getUGI(request); |
| UserGroupInformation.setCurrentUser(ugi); |
| |
| final ServletContext context = getServletContext(); |
| final Configuration conf = new HdfsConfiguration((Configuration) context.getAttribute("name.conf")); |
| UnixUserGroupInformation.saveToConf(conf, |
| UnixUserGroupInformation.UGI_PROPERTY_NAME, ugi); |
| |
| final NameNode nn = (NameNode) context.getAttribute("name.node"); |
| final FSNamesystem namesystem = nn.getNamesystem(); |
| final int totalDatanodes = namesystem.getNumberOfDatanodes(DatanodeReportType.LIVE); |
| final short minReplication = namesystem.getMinReplication(); |
| |
| new NamenodeFsck(conf, nn, nn.getNetworkTopology(), pmap, out, |
| totalDatanodes, minReplication).fsck(); |
| } |
| } |