| /** |
| * 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.assertTrue; |
| import static org.junit.Assert.assertNotNull; |
| |
| import java.lang.management.ManagementFactory; |
| import java.util.HashSet; |
| import java.util.Map; |
| import java.util.Set; |
| |
| import javax.management.MBeanAttributeInfo; |
| import javax.management.MBeanInfo; |
| import javax.management.MBeanServer; |
| import javax.management.ObjectName; |
| |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.hdfs.MiniDFSCluster; |
| import org.apache.hadoop.metrics2.impl.ConfigBuilder; |
| import org.apache.hadoop.metrics2.impl.TestMetricsConfig; |
| import org.junit.Test; |
| import org.mortbay.util.ajax.JSON; |
| |
| /** |
| * Class for testing {@link NameNodeMXBean} implementation |
| */ |
| public class TestFSNamesystemMBean { |
| |
| /** |
| * MBeanClient tries to access FSNamesystem/FSNamesystemState/NameNodeInfo |
| * JMX properties. If it can access all the properties, the test is |
| * considered successful. |
| */ |
| private static class MBeanClient extends Thread { |
| private boolean succeeded = false; |
| @Override |
| public void run() { |
| try { |
| MBeanServer mbs = ManagementFactory.getPlatformMBeanServer(); |
| |
| // Metrics that belong to "FSNamesystem", these are metrics that |
| // come from hadoop metrics framework for the class FSNamesystem. |
| ObjectName mxbeanNamefsn = new ObjectName( |
| "Hadoop:service=NameNode,name=FSNamesystem"); |
| |
| // Metrics that belong to "FSNamesystemState". |
| // These are metrics that FSNamesystem registers directly with MBeanServer. |
| ObjectName mxbeanNameFsns = new ObjectName( |
| "Hadoop:service=NameNode,name=FSNamesystemState"); |
| |
| // Metrics that belong to "NameNodeInfo". |
| // These are metrics that FSNamesystem registers directly with MBeanServer. |
| ObjectName mxbeanNameNni = new ObjectName( |
| "Hadoop:service=NameNode,name=NameNodeInfo"); |
| |
| final Set<ObjectName> mbeans = new HashSet<ObjectName>(); |
| mbeans.add(mxbeanNamefsn); |
| mbeans.add(mxbeanNameFsns); |
| mbeans.add(mxbeanNameNni); |
| |
| for(ObjectName mbean : mbeans) { |
| MBeanInfo attributes = mbs.getMBeanInfo(mbean); |
| for (MBeanAttributeInfo attributeInfo : attributes.getAttributes()) { |
| mbs.getAttribute(mbean, attributeInfo.getName()); |
| } |
| } |
| |
| succeeded = true; |
| } catch (Exception e) { |
| } |
| } |
| } |
| |
| @Test |
| public void test() 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=FSNamesystemState"); |
| |
| String snapshotStats = (String) (mbs.getAttribute(mxbeanName, |
| "SnapshotStats")); |
| |
| @SuppressWarnings("unchecked") |
| Map<String, Object> stat = (Map<String, Object>) JSON |
| .parse(snapshotStats); |
| |
| assertTrue(stat.containsKey("SnapshottableDirectories") |
| && (Long) stat.get("SnapshottableDirectories") == fsn |
| .getNumSnapshottableDirs()); |
| assertTrue(stat.containsKey("Snapshots") |
| && (Long) stat.get("Snapshots") == fsn.getNumSnapshots()); |
| |
| Object pendingDeletionBlocks = mbs.getAttribute(mxbeanName, |
| "PendingDeletionBlocks"); |
| assertNotNull(pendingDeletionBlocks); |
| assertTrue(pendingDeletionBlocks instanceof Long); |
| |
| Object encryptionZones = mbs.getAttribute(mxbeanName, |
| "NumEncryptionZones"); |
| assertNotNull(encryptionZones); |
| assertTrue(encryptionZones instanceof Integer); |
| } finally { |
| if (cluster != null) { |
| cluster.shutdown(); |
| } |
| } |
| } |
| |
| // The test makes sure JMX request can be processed even if namesystem's |
| // writeLock is owned by another thread. |
| @Test |
| public void testWithFSNamesystemWriteLock() throws Exception { |
| Configuration conf = new Configuration(); |
| MiniDFSCluster cluster = null; |
| FSNamesystem fsn = null; |
| |
| int jmxCachePeriod = 1; |
| new ConfigBuilder().add("namenode.period", jmxCachePeriod) |
| .save(TestMetricsConfig.getTestFilename("hadoop-metrics2-namenode")); |
| try { |
| cluster = new MiniDFSCluster.Builder(conf).build(); |
| cluster.waitActive(); |
| |
| fsn = cluster.getNameNode().namesystem; |
| fsn.writeLock(); |
| Thread.sleep(jmxCachePeriod * 1000); |
| |
| MBeanClient client = new MBeanClient(); |
| client.start(); |
| client.join(20000); |
| assertTrue("JMX calls are blocked when FSNamesystem's writerlock" + |
| "is owned by another thread", client.succeeded); |
| client.interrupt(); |
| } finally { |
| if (fsn != null && fsn.hasWriteLock()) { |
| fsn.writeUnlock(); |
| } |
| if (cluster != null) { |
| cluster.shutdown(); |
| } |
| } |
| } |
| |
| // The test makes sure JMX request can be processed even if FSEditLog |
| // is synchronized. |
| @Test |
| public void testWithFSEditLogLock() throws Exception { |
| Configuration conf = new Configuration(); |
| int jmxCachePeriod = 1; |
| new ConfigBuilder().add("namenode.period", jmxCachePeriod) |
| .save(TestMetricsConfig.getTestFilename("hadoop-metrics2-namenode")); |
| MiniDFSCluster cluster = null; |
| try { |
| cluster = new MiniDFSCluster.Builder(conf).build(); |
| cluster.waitActive(); |
| synchronized (cluster.getNameNode().getFSImage().getEditLog()) { |
| Thread.sleep(jmxCachePeriod * 1000); |
| MBeanClient client = new MBeanClient(); |
| client.start(); |
| client.join(20000); |
| assertTrue("JMX calls are blocked when FSEditLog" + |
| " is synchronized by another thread", client.succeeded); |
| client.interrupt(); |
| } |
| } finally { |
| if (cluster != null) { |
| cluster.shutdown(); |
| } |
| } |
| } |
| |
| @Test(timeout = 120000) |
| public void testFsEditLogMetrics() throws Exception { |
| final Configuration conf = new Configuration(); |
| MiniDFSCluster cluster = null; |
| try { |
| cluster = new MiniDFSCluster.Builder(conf).numDataNodes(0).build(); |
| cluster.waitActive(); |
| MBeanServer mbs = ManagementFactory.getPlatformMBeanServer(); |
| ObjectName mxbeanNameFs = |
| new ObjectName("Hadoop:service=NameNode,name=FSNamesystemState"); |
| |
| FileSystem fs = cluster.getFileSystem(); |
| final int NUM_OPS = 10; |
| for (int i = 0; i < NUM_OPS; i++) { |
| final Path path = new Path(String.format("/user%d", i)); |
| fs.mkdirs(path); |
| } |
| |
| long syncCount = (long) mbs.getAttribute(mxbeanNameFs, "TotalSyncCount"); |
| String syncTimes = |
| (String) mbs.getAttribute(mxbeanNameFs, "TotalSyncTimes"); |
| assertTrue(syncCount > 0); |
| assertNotNull(syncTimes); |
| } finally { |
| if (cluster != null) { |
| cluster.shutdown(); |
| } |
| } |
| } |
| } |