| /** |
| * 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; |
| |
| import java.net.InetSocketAddress; |
| import java.util.ArrayList; |
| |
| import junit.framework.TestCase; |
| import org.apache.hadoop.conf.Configuration; |
| |
| import org.apache.hadoop.hdfs.protocol.DatanodeInfo; |
| import org.apache.hadoop.hdfs.protocol.FSConstants.DatanodeReportType; |
| import org.apache.hadoop.hdfs.server.datanode.DataNode; |
| import org.apache.hadoop.hdfs.server.namenode.metrics.FSNamesystemMetrics; |
| |
| /** |
| * This test ensures the all types of data node report work correctly. |
| */ |
| public class TestDatanodeReport extends TestCase { |
| final static private Configuration conf = new HdfsConfiguration(); |
| final static private int NUM_OF_DATANODES = 4; |
| |
| /** |
| * This test attempts to different types of datanode report. |
| */ |
| public void testDatanodeReport() throws Exception { |
| conf.setInt( |
| DFSConfigKeys.DFS_NAMENODE_HEARTBEAT_RECHECK_INTERVAL_KEY, 500); // 0.5s |
| conf.setLong("dfs.heartbeat.interval", 1L); |
| MiniDFSCluster cluster = |
| new MiniDFSCluster(conf, NUM_OF_DATANODES, true, null); |
| try { |
| //wait until the cluster is up |
| cluster.waitActive(); |
| |
| InetSocketAddress addr = new InetSocketAddress("localhost", |
| cluster.getNameNodePort()); |
| DFSClient client = new DFSClient(addr, conf); |
| |
| assertEquals(client.datanodeReport(DatanodeReportType.ALL).length, |
| NUM_OF_DATANODES); |
| assertEquals(client.datanodeReport(DatanodeReportType.LIVE).length, |
| NUM_OF_DATANODES); |
| assertEquals(client.datanodeReport(DatanodeReportType.DEAD).length, 0); |
| |
| // bring down one datanode |
| ArrayList<DataNode> datanodes = cluster.getDataNodes(); |
| datanodes.remove(datanodes.size()-1).shutdown(); |
| |
| DatanodeInfo[] nodeInfo = client.datanodeReport(DatanodeReportType.DEAD); |
| while (nodeInfo.length != 1) { |
| try { |
| Thread.sleep(500); |
| } catch (Exception e) { |
| } |
| nodeInfo = client.datanodeReport(DatanodeReportType.DEAD); |
| } |
| |
| assertEquals(client.datanodeReport(DatanodeReportType.LIVE).length, |
| NUM_OF_DATANODES-1); |
| assertEquals(client.datanodeReport(DatanodeReportType.ALL).length, |
| NUM_OF_DATANODES); |
| |
| Thread.sleep(5000); |
| FSNamesystemMetrics fsMetrics = |
| cluster.getNamesystem().getFSNamesystemMetrics(); |
| assertEquals(1,fsMetrics.numExpiredHeartbeats.getCurrentIntervalValue()); |
| }finally { |
| cluster.shutdown(); |
| } |
| } |
| |
| public static void main(String[] args) throws Exception { |
| new TestDatanodeReport().testDatanodeReport(); |
| } |
| |
| } |
| |
| |