TestDatanodeReport.java
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上传日期:2018-01-08
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- /**
- * 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;
- /**
- * This test ensures the all types of data node report work correctly.
- */
- public class TestDatanodeReport extends TestCase {
- final static private Configuration conf = new Configuration();
- final static private int NUM_OF_DATANODES = 4;
-
- /**
- * This test attempts to different types of datanode report.
- */
- public void testDatanodeReport() throws Exception {
- conf.setInt(
- "heartbeat.recheck.interval", 500); // 0.5s
- 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);
- }finally {
- cluster.shutdown();
- }
- }
-
- public static void main(String[] args) throws Exception {
- new TestDatanodeReport().testDatanodeReport();
- }
-
- }