| /** |
| * 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 static org.apache.hadoop.test.MetricsAsserts.assertGauge; |
| import static org.apache.hadoop.test.MetricsAsserts.getMetrics; |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertTrue; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.io.PipedInputStream; |
| import java.io.PipedOutputStream; |
| import java.io.PrintStream; |
| import java.lang.management.ManagementFactory; |
| import java.util.Random; |
| import java.util.Set; |
| import java.util.concurrent.TimeoutException; |
| |
| import javax.management.MBeanServerConnection; |
| import javax.management.ObjectName; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.CommonConfigurationKeys; |
| 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.DFSTestUtil; |
| import org.apache.hadoop.hdfs.HdfsConfiguration; |
| import org.apache.hadoop.hdfs.MiniDFSCluster; |
| import org.apache.hadoop.hdfs.tools.JMXGet; |
| import org.junit.After; |
| import org.junit.Before; |
| import org.junit.Test; |
| |
| |
| /** |
| * Startup and checkpoint tests |
| * |
| */ |
| public class TestJMXGet { |
| public static final String WRONG_METRIC_VALUE_ERROR_MSG = "Unable to get the correct value for %s."; |
| |
| 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(CommonConfigurationKeys.IO_FILE_BUFFER_SIZE_KEY, 4096), |
| (short)repl, blockSize); |
| byte[] buffer = new byte[fileSize]; |
| Random rand = new Random(seed); |
| rand.nextBytes(buffer); |
| stm.write(buffer); |
| stm.close(); |
| } |
| |
| |
| @Before |
| public void setUp() throws Exception { |
| config = new HdfsConfiguration(); |
| } |
| |
| /** |
| * clean up |
| */ |
| @After |
| public void tearDown() throws Exception { |
| if (cluster != null) { |
| 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 + "'"); |
| } |
| cluster = null; |
| } |
| } |
| |
| /** |
| * test JMX connection to NameNode.. |
| * @throws Exception |
| */ |
| @Test |
| 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(); |
| String serviceName = "NameNode"; |
| jmx.setService(serviceName); |
| jmx.init(); // default lists namenode mbeans only |
| assertTrue("error printAllValues", checkPrintAllValues(jmx)); |
| |
| //get some data from different source |
| try { |
| DFSTestUtil.waitForMetric(jmx, "NumLiveDataNodes", numDatanodes); |
| } catch (TimeoutException e) { |
| assertEquals(String.format(WRONG_METRIC_VALUE_ERROR_MSG, "NumLiveDataNodes"),numDatanodes, Integer.parseInt( |
| jmx.getValue("NumLiveDataNodes"))); |
| } |
| assertGauge("CorruptBlocks", Long.parseLong(jmx.getValue("CorruptBlocks")), |
| getMetrics("FSNamesystem")); |
| |
| cluster.shutdown(); |
| MBeanServerConnection mbsc = ManagementFactory.getPlatformMBeanServer(); |
| ObjectName query = new ObjectName("Hadoop:service=" + serviceName + ",*"); |
| Set<ObjectName> names = mbsc.queryNames(query, null); |
| assertTrue("No beans should be registered for " + serviceName, names.isEmpty()); |
| } |
| |
| private static boolean checkPrintAllValues(JMXGet jmx) throws Exception { |
| int size = 0; |
| byte[] bytes = null; |
| String pattern = "List of all the available keys:"; |
| PipedOutputStream pipeOut = new PipedOutputStream(); |
| PipedInputStream pipeIn = new PipedInputStream(pipeOut, 1024 * 1024); |
| PrintStream oldErr = System.err; |
| System.setErr(new PrintStream(pipeOut)); |
| try { |
| jmx.printAllValues(); |
| if ((size = pipeIn.available()) != 0) { |
| bytes = new byte[size]; |
| pipeIn.read(bytes, 0, bytes.length); |
| } |
| pipeOut.close(); |
| pipeIn.close(); |
| } finally { |
| System.setErr(oldErr); |
| } |
| return bytes != null ? new String(bytes).contains(pattern) : false; |
| } |
| |
| /** |
| * test JMX connection to DataNode.. |
| * @throws Exception |
| */ |
| @Test |
| 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(); |
| String serviceName = "DataNode"; |
| jmx.setService(serviceName); |
| jmx.init(); |
| try { |
| DFSTestUtil.waitForMetric(jmx, "BytesWritten", fileSize); |
| } catch (TimeoutException e) { |
| assertEquals(String.format(WRONG_METRIC_VALUE_ERROR_MSG, "BytesWritten"), fileSize, Integer.parseInt(jmx.getValue("BytesWritten"))); |
| } |
| |
| cluster.shutdown(); |
| MBeanServerConnection mbsc = ManagementFactory.getPlatformMBeanServer(); |
| ObjectName query = new ObjectName("Hadoop:service=" + serviceName + ",*"); |
| Set<ObjectName> names = mbsc.queryNames(query, null); |
| assertTrue("No beans should be registered for " + serviceName, names.isEmpty()); |
| } |
| } |