| /** |
| * 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.tools; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.util.Random; |
| |
| import junit.framework.TestCase; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.FSDataOutputStream; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.FileUtil; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.hdfs.HdfsConfiguration; |
| import org.apache.hadoop.hdfs.MiniDFSCluster; |
| import org.apache.hadoop.hdfs.server.namenode.NameNode; |
| import org.apache.hadoop.hdfs.tools.JMXGet; |
| |
| |
| /** |
| * Startup and checkpoint tests |
| * |
| */ |
| public class TestJMXGet extends TestCase { |
| |
| private Configuration config; |
| private MiniDFSCluster cluster; |
| |
| static final long seed = 0xAAAAEEFL; |
| static final int blockSize = 4096; |
| static final int fileSize = 8192; |
| |
| private void writeFile(FileSystem fileSys, Path name, int repl) |
| throws IOException { |
| FSDataOutputStream stm = fileSys.create(name, true, |
| fileSys.getConf().getInt("io.file.buffer.size", 4096), |
| (short)repl, (long)blockSize); |
| byte[] buffer = new byte[fileSize]; |
| Random rand = new Random(seed); |
| rand.nextBytes(buffer); |
| stm.write(buffer); |
| stm.close(); |
| } |
| |
| |
| protected void setUp() throws Exception { |
| config = new HdfsConfiguration(); |
| } |
| |
| /** |
| * clean up |
| */ |
| public void tearDown() throws Exception { |
| if(cluster.isClusterUp()) |
| cluster.shutdown(); |
| |
| File data_dir = new File(cluster.getDataDirectory()); |
| if(data_dir.exists() && !FileUtil.fullyDelete(data_dir)) { |
| throw new IOException("Could not delete hdfs directory in tearDown '" |
| + data_dir + "'"); |
| } |
| } |
| |
| /** |
| * test JMX connection to NameNode.. |
| * @throws Exception |
| */ |
| public void testNameNode() throws Exception { |
| int numDatanodes = 2; |
| cluster = new MiniDFSCluster.Builder(config).numDataNodes(numDatanodes).build(); |
| cluster.waitActive(); |
| |
| writeFile(cluster.getFileSystem(), new Path("/test1"), 2); |
| |
| JMXGet jmx = new JMXGet(); |
| jmx.init(); |
| |
| |
| //get some data from different sources |
| int blocks_corrupted = NameNode.getNameNodeMetrics(). |
| numBlocksCorrupted.get(); |
| assertEquals(Integer.parseInt( |
| jmx.getValue("NumLiveDataNodes")), 2); |
| assertEquals(Integer.parseInt( |
| jmx.getValue("BlocksCorrupted")), blocks_corrupted); |
| assertEquals(Integer.parseInt( |
| jmx.getValue("NumOpenConnections")), 0); |
| |
| cluster.shutdown(); |
| } |
| |
| /** |
| * test JMX connection to DataNode.. |
| * @throws Exception |
| */ |
| public void testDataNode() throws Exception { |
| int numDatanodes = 2; |
| cluster = new MiniDFSCluster.Builder(config).numDataNodes(numDatanodes).build(); |
| cluster.waitActive(); |
| |
| writeFile(cluster.getFileSystem(), new Path("/test"), 2); |
| |
| JMXGet jmx = new JMXGet(); |
| jmx.setService("DataNode"); |
| jmx.init(); |
| assertEquals(Integer.parseInt(jmx.getValue("bytes_written")), 0); |
| |
| cluster.shutdown(); |
| } |
| } |