| /** |
| * 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 java.lang.management.ManagementFactory; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.BlockLocation; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.hdfs.DFSConfigKeys; |
| import org.apache.hadoop.hdfs.DFSTestUtil; |
| import org.apache.hadoop.hdfs.HdfsConfiguration; |
| import org.apache.hadoop.hdfs.MiniDFSCluster; |
| import org.apache.hadoop.hdfs.protocol.ExtendedBlock; |
| import org.junit.Test; |
| |
| import javax.management.MBeanServer; |
| import javax.management.ObjectName; |
| |
| /** |
| * DFS_HOSTS and DFS_HOSTS_EXCLUDE tests |
| * |
| */ |
| public class TestHostsFiles { |
| private static final Log LOG = |
| LogFactory.getLog(TestHostsFiles.class.getName()); |
| |
| /* |
| * Return a configuration object with low timeouts for testing and |
| * a topology script set (which enables rack awareness). |
| */ |
| private Configuration getConf() { |
| Configuration conf = new HdfsConfiguration(); |
| |
| // Lower the heart beat interval so the NN quickly learns of dead |
| // or decommissioned DNs and the NN issues replication and invalidation |
| // commands quickly (as replies to heartbeats) |
| conf.setLong(DFSConfigKeys.DFS_HEARTBEAT_INTERVAL_KEY, 1L); |
| |
| // Have the NN ReplicationMonitor compute the replication and |
| // invalidation commands to send DNs every second. |
| conf.setInt(DFSConfigKeys.DFS_NAMENODE_REPLICATION_INTERVAL_KEY, 1); |
| |
| // Have the NN check for pending replications every second so it |
| // quickly schedules additional replicas as they are identified. |
| conf.setInt(DFSConfigKeys.DFS_NAMENODE_REPLICATION_PENDING_TIMEOUT_SEC_KEY, 1); |
| |
| // The DNs report blocks every second. |
| conf.setLong(DFSConfigKeys.DFS_BLOCKREPORT_INTERVAL_MSEC_KEY, 1000L); |
| |
| // Indicates we have multiple racks |
| conf.set(DFSConfigKeys.NET_TOPOLOGY_SCRIPT_FILE_NAME_KEY, "xyz"); |
| return conf; |
| } |
| |
| @Test |
| public void testHostsExcludeInUI() throws Exception { |
| Configuration conf = getConf(); |
| short REPLICATION_FACTOR = 2; |
| final Path filePath = new Path("/testFile"); |
| |
| // Configure an excludes file |
| FileSystem localFileSys = FileSystem.getLocal(conf); |
| Path workingDir = localFileSys.getWorkingDirectory(); |
| Path dir = new Path(workingDir, "build/test/data/temp/decommission"); |
| Path excludeFile = new Path(dir, "exclude"); |
| Path includeFile = new Path(dir, "include"); |
| assertTrue(localFileSys.mkdirs(dir)); |
| DFSTestUtil.writeFile(localFileSys, excludeFile, ""); |
| DFSTestUtil.writeFile(localFileSys, includeFile, ""); |
| conf.set(DFSConfigKeys.DFS_HOSTS_EXCLUDE, excludeFile.toUri().getPath()); |
| conf.set(DFSConfigKeys.DFS_HOSTS, includeFile.toUri().getPath()); |
| |
| // Two blocks and four racks |
| String racks[] = {"/rack1", "/rack1", "/rack2", "/rack2"}; |
| MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf) |
| .numDataNodes(racks.length).racks(racks).build(); |
| final FSNamesystem ns = cluster.getNameNode().getNamesystem(); |
| |
| try { |
| // Create a file with one block |
| final FileSystem fs = cluster.getFileSystem(); |
| DFSTestUtil.createFile(fs, filePath, 1L, REPLICATION_FACTOR, 1L); |
| ExtendedBlock b = DFSTestUtil.getFirstBlock(fs, filePath); |
| DFSTestUtil.waitForReplication(cluster, b, 2, REPLICATION_FACTOR, 0); |
| |
| // Decommission one of the hosts with the block, this should cause |
| // the block to get replicated to another host on the same rack, |
| // otherwise the rack policy is violated. |
| BlockLocation locs[] = fs.getFileBlockLocations( |
| fs.getFileStatus(filePath), 0, Long.MAX_VALUE); |
| String name = locs[0].getNames()[0]; |
| String names = name + "\n" + "localhost:42\n"; |
| LOG.info("adding '" + names + "' to exclude file " + excludeFile.toUri().getPath()); |
| DFSTestUtil.writeFile(localFileSys, excludeFile, name); |
| ns.getBlockManager().getDatanodeManager().refreshNodes(conf); |
| DFSTestUtil.waitForDecommission(fs, name); |
| |
| // Check the block still has sufficient # replicas across racks |
| DFSTestUtil.waitForReplication(cluster, b, 2, REPLICATION_FACTOR, 0); |
| |
| MBeanServer mbs = ManagementFactory.getPlatformMBeanServer(); |
| ObjectName mxbeanName = new ObjectName( |
| "Hadoop:service=NameNode,name=NameNodeInfo"); |
| String nodes = (String) mbs.getAttribute(mxbeanName, "LiveNodes"); |
| assertTrue("Live nodes should contain the decommissioned node", |
| nodes.contains("Decommissioned")); |
| } finally { |
| cluster.shutdown(); |
| } |
| } |
| |
| @Test |
| public void testHostsIncludeForDeadCount() throws Exception { |
| Configuration conf = getConf(); |
| |
| // Configure an excludes file |
| FileSystem localFileSys = FileSystem.getLocal(conf); |
| Path workingDir = localFileSys.getWorkingDirectory(); |
| Path dir = new Path(workingDir, "build/test/data/temp/decommission"); |
| Path excludeFile = new Path(dir, "exclude"); |
| Path includeFile = new Path(dir, "include"); |
| assertTrue(localFileSys.mkdirs(dir)); |
| StringBuilder includeHosts = new StringBuilder(); |
| includeHosts.append("localhost:52").append("\n").append("127.0.0.1:7777") |
| .append("\n"); |
| DFSTestUtil.writeFile(localFileSys, excludeFile, ""); |
| DFSTestUtil.writeFile(localFileSys, includeFile, includeHosts.toString()); |
| conf.set(DFSConfigKeys.DFS_HOSTS_EXCLUDE, excludeFile.toUri().getPath()); |
| conf.set(DFSConfigKeys.DFS_HOSTS, includeFile.toUri().getPath()); |
| |
| MiniDFSCluster cluster = null; |
| try { |
| cluster = new MiniDFSCluster.Builder(conf).numDataNodes(0).build(); |
| final FSNamesystem ns = cluster.getNameNode().getNamesystem(); |
| assertTrue(ns.getNumDeadDataNodes() == 2); |
| assertTrue(ns.getNumLiveDataNodes() == 0); |
| |
| // Testing using MBeans |
| MBeanServer mbs = ManagementFactory.getPlatformMBeanServer(); |
| ObjectName mxbeanName = new ObjectName( |
| "Hadoop:service=NameNode,name=FSNamesystemState"); |
| String nodes = mbs.getAttribute(mxbeanName, "NumDeadDataNodes") + ""; |
| assertTrue((Integer) mbs.getAttribute(mxbeanName, "NumDeadDataNodes") == 2); |
| assertTrue((Integer) mbs.getAttribute(mxbeanName, "NumLiveDataNodes") == 0); |
| } finally { |
| if (cluster != null) { |
| cluster.shutdown(); |
| } |
| } |
| } |
| } |