1 | /** |
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2 | * Licensed to the Apache Software Foundation (ASF) under one |
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3 | * or more contributor license agreements. See the NOTICE file |
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4 | * distributed with this work for additional information |
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5 | * regarding copyright ownership. The ASF licenses this file |
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6 | * to you under the Apache License, Version 2.0 (the |
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7 | * "License"); you may not use this file except in compliance |
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8 | * with the License. You may obtain a copy of the License at |
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9 | * |
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10 | * http://www.apache.org/licenses/LICENSE-2.0 |
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11 | * |
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12 | * Unless required by applicable law or agreed to in writing, software |
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13 | * distributed under the License is distributed on an "AS IS" BASIS, |
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14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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15 | * See the License for the specific language governing permissions and |
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16 | * limitations under the License. |
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17 | */ |
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18 | package org.apache.hadoop.hdfs; |
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19 | |
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20 | import java.net.InetSocketAddress; |
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21 | import java.util.ArrayList; |
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22 | |
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23 | import junit.framework.TestCase; |
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24 | import org.apache.hadoop.conf.Configuration; |
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25 | |
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26 | import org.apache.hadoop.hdfs.protocol.DatanodeInfo; |
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27 | import org.apache.hadoop.hdfs.protocol.FSConstants.DatanodeReportType; |
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28 | import org.apache.hadoop.hdfs.server.datanode.DataNode; |
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29 | |
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30 | /** |
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31 | * This test ensures the all types of data node report work correctly. |
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32 | */ |
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33 | public class TestDatanodeReport extends TestCase { |
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34 | final static private Configuration conf = new Configuration(); |
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35 | final static private int NUM_OF_DATANODES = 4; |
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36 | |
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37 | /** |
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38 | * This test attempts to different types of datanode report. |
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39 | */ |
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40 | public void testDatanodeReport() throws Exception { |
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41 | conf.setInt( |
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42 | "heartbeat.recheck.interval", 500); // 0.5s |
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43 | MiniDFSCluster cluster = |
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44 | new MiniDFSCluster(conf, NUM_OF_DATANODES, true, null); |
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45 | try { |
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46 | //wait until the cluster is up |
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47 | cluster.waitActive(); |
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48 | |
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49 | InetSocketAddress addr = new InetSocketAddress("localhost", |
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50 | cluster.getNameNodePort()); |
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51 | DFSClient client = new DFSClient(addr, conf); |
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52 | |
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53 | assertEquals(client.datanodeReport(DatanodeReportType.ALL).length, |
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54 | NUM_OF_DATANODES); |
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55 | assertEquals(client.datanodeReport(DatanodeReportType.LIVE).length, |
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56 | NUM_OF_DATANODES); |
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57 | assertEquals(client.datanodeReport(DatanodeReportType.DEAD).length, 0); |
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58 | |
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59 | // bring down one datanode |
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60 | ArrayList<DataNode> datanodes = cluster.getDataNodes(); |
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61 | datanodes.remove(datanodes.size()-1).shutdown(); |
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62 | |
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63 | DatanodeInfo[] nodeInfo = client.datanodeReport(DatanodeReportType.DEAD); |
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64 | while (nodeInfo.length != 1) { |
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65 | try { |
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66 | Thread.sleep(500); |
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67 | } catch (Exception e) { |
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68 | } |
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69 | nodeInfo = client.datanodeReport(DatanodeReportType.DEAD); |
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70 | } |
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71 | |
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72 | assertEquals(client.datanodeReport(DatanodeReportType.LIVE).length, |
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73 | NUM_OF_DATANODES-1); |
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74 | assertEquals(client.datanodeReport(DatanodeReportType.ALL).length, |
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75 | NUM_OF_DATANODES); |
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76 | }finally { |
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77 | cluster.shutdown(); |
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78 | } |
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79 | } |
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80 | |
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81 | public static void main(String[] args) throws Exception { |
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82 | new TestDatanodeReport().testDatanodeReport(); |
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83 | } |
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84 | |
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85 | } |
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86 | |
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87 | |
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