| /** |
| * 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 static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertTrue; |
| |
| import java.io.File; |
| import java.lang.management.ManagementFactory; |
| import java.net.URI; |
| import java.util.Collection; |
| import java.util.Map; |
| |
| import javax.management.MBeanServer; |
| import javax.management.ObjectName; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.FileUtil; |
| import org.apache.hadoop.hdfs.MiniDFSCluster; |
| import org.apache.hadoop.util.VersionInfo; |
| import org.junit.Test; |
| import org.mortbay.util.ajax.JSON; |
| |
| /** |
| * Class for testing {@link NameNodeMXBean} implementation |
| */ |
| public class TestNameNodeMXBean { |
| |
| /** |
| * Used to assert equality between doubles |
| */ |
| private static final double DELTA = 0.000001; |
| |
| @SuppressWarnings({ "unchecked", "deprecation" }) |
| @Test |
| public void testNameNodeMXBeanInfo() throws Exception { |
| Configuration conf = new Configuration(); |
| MiniDFSCluster cluster = null; |
| |
| try { |
| cluster = new MiniDFSCluster.Builder(conf).build(); |
| cluster.waitActive(); |
| |
| FSNamesystem fsn = cluster.getNameNode().namesystem; |
| |
| MBeanServer mbs = ManagementFactory.getPlatformMBeanServer(); |
| ObjectName mxbeanName = new ObjectName( |
| "Hadoop:service=NameNode,name=NameNodeInfo"); |
| // get attribute "ClusterId" |
| String clusterId = (String) mbs.getAttribute(mxbeanName, "ClusterId"); |
| assertEquals(fsn.getClusterId(), clusterId); |
| // get attribute "BlockPoolId" |
| String blockpoolId = (String) mbs.getAttribute(mxbeanName, |
| "BlockPoolId"); |
| assertEquals(fsn.getBlockPoolId(), blockpoolId); |
| // get attribute "Version" |
| String version = (String) mbs.getAttribute(mxbeanName, "Version"); |
| assertEquals(fsn.getVersion(), version); |
| assertTrue(version.equals(VersionInfo.getVersion() |
| + ", r" + VersionInfo.getRevision())); |
| // get attribute "Used" |
| Long used = (Long) mbs.getAttribute(mxbeanName, "Used"); |
| assertEquals(fsn.getUsed(), used.longValue()); |
| // get attribute "Total" |
| Long total = (Long) mbs.getAttribute(mxbeanName, "Total"); |
| assertEquals(fsn.getTotal(), total.longValue()); |
| // get attribute "safemode" |
| String safemode = (String) mbs.getAttribute(mxbeanName, "Safemode"); |
| assertEquals(fsn.getSafemode(), safemode); |
| // get attribute nondfs |
| Long nondfs = (Long) (mbs.getAttribute(mxbeanName, "NonDfsUsedSpace")); |
| assertEquals(fsn.getNonDfsUsedSpace(), nondfs.longValue()); |
| // get attribute percentremaining |
| Float percentremaining = (Float) (mbs.getAttribute(mxbeanName, |
| "PercentRemaining")); |
| assertEquals(fsn.getPercentRemaining(), percentremaining |
| .floatValue(), DELTA); |
| // get attribute Totalblocks |
| Long totalblocks = (Long) (mbs.getAttribute(mxbeanName, "TotalBlocks")); |
| assertEquals(fsn.getTotalBlocks(), totalblocks.longValue()); |
| // get attribute alivenodeinfo |
| String alivenodeinfo = (String) (mbs.getAttribute(mxbeanName, |
| "LiveNodes")); |
| Map<String, Map<String, Object>> liveNodes = |
| (Map<String, Map<String, Object>>) JSON.parse(alivenodeinfo); |
| assertTrue(liveNodes.size() > 0); |
| for (Map<String, Object> liveNode : liveNodes.values()) { |
| assertTrue(liveNode.containsKey("nonDfsUsedSpace")); |
| assertTrue(((Long)liveNode.get("nonDfsUsedSpace")) > 0); |
| assertTrue(liveNode.containsKey("capacity")); |
| assertTrue(((Long)liveNode.get("capacity")) > 0); |
| assertTrue(liveNode.containsKey("numBlocks")); |
| assertTrue(((Long)liveNode.get("numBlocks")) == 0); |
| } |
| assertEquals(fsn.getLiveNodes(), alivenodeinfo); |
| // get attribute deadnodeinfo |
| String deadnodeinfo = (String) (mbs.getAttribute(mxbeanName, |
| "DeadNodes")); |
| assertEquals(fsn.getDeadNodes(), deadnodeinfo); |
| // get attribute NameDirStatuses |
| String nameDirStatuses = (String) (mbs.getAttribute(mxbeanName, |
| "NameDirStatuses")); |
| assertEquals(fsn.getNameDirStatuses(), nameDirStatuses); |
| Map<String, Map<String, String>> statusMap = |
| (Map<String, Map<String, String>>) JSON.parse(nameDirStatuses); |
| Collection<URI> nameDirUris = cluster.getNameDirs(0); |
| for (URI nameDirUri : nameDirUris) { |
| File nameDir = new File(nameDirUri); |
| System.out.println("Checking for the presence of " + nameDir + |
| " in active name dirs."); |
| assertTrue(statusMap.get("active").containsKey(nameDir.getAbsolutePath())); |
| } |
| assertEquals(2, statusMap.get("active").size()); |
| assertEquals(0, statusMap.get("failed").size()); |
| |
| // This will cause the first dir to fail. |
| File failedNameDir = new File(nameDirUris.toArray(new URI[0])[0]); |
| assertEquals(0, FileUtil.chmod(failedNameDir.getAbsolutePath(), "000")); |
| cluster.getNameNodeRpc().rollEditLog(); |
| |
| nameDirStatuses = (String) (mbs.getAttribute(mxbeanName, |
| "NameDirStatuses")); |
| statusMap = (Map<String, Map<String, String>>) JSON.parse(nameDirStatuses); |
| for (URI nameDirUri : nameDirUris) { |
| File nameDir = new File(nameDirUri); |
| String expectedStatus = |
| nameDir.equals(failedNameDir) ? "failed" : "active"; |
| System.out.println("Checking for the presence of " + nameDir + |
| " in " + expectedStatus + " name dirs."); |
| assertTrue(statusMap.get(expectedStatus).containsKey( |
| nameDir.getAbsolutePath())); |
| } |
| assertEquals(1, statusMap.get("active").size()); |
| assertEquals(1, statusMap.get("failed").size()); |
| } finally { |
| if (cluster != null) { |
| for (URI dir : cluster.getNameDirs(0)) { |
| FileUtil.chmod(new File(dir).toString(), "700"); |
| } |
| cluster.shutdown(); |
| } |
| } |
| } |
| } |