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 org.apache.commons.logging.impl.Log4JLogger; |
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21 | import org.apache.hadoop.conf.Configuration; |
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22 | import org.apache.hadoop.fs.FSDataInputStream; |
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23 | import org.apache.hadoop.fs.FSDataOutputStream; |
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24 | import org.apache.hadoop.fs.FileSystem; |
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25 | import org.apache.hadoop.fs.Path; |
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26 | import org.apache.hadoop.hdfs.server.datanode.DataNode; |
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27 | import org.apache.hadoop.hdfs.server.namenode.FSNamesystem; |
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28 | import org.apache.hadoop.hdfs.server.namenode.LeaseManager; |
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29 | import org.apache.hadoop.hdfs.server.protocol.InterDatanodeProtocol; |
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30 | import org.apache.hadoop.io.IOUtils; |
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31 | import org.apache.log4j.Level; |
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32 | |
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33 | /** |
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34 | * This class tests that a file need not be closed before its |
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35 | * data can be read by another client. |
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36 | */ |
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37 | public class TestFileCreationClient extends junit.framework.TestCase { |
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38 | static final String DIR = "/" + TestFileCreationClient.class.getSimpleName() + "/"; |
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39 | |
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40 | { |
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41 | ((Log4JLogger)DataNode.LOG).getLogger().setLevel(Level.ALL); |
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42 | ((Log4JLogger)LeaseManager.LOG).getLogger().setLevel(Level.ALL); |
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43 | ((Log4JLogger)FSNamesystem.LOG).getLogger().setLevel(Level.ALL); |
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44 | ((Log4JLogger)InterDatanodeProtocol.LOG).getLogger().setLevel(Level.ALL); |
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45 | } |
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46 | |
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47 | /** Test lease recovery Triggered by DFSClient. */ |
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48 | public void testClientTriggeredLeaseRecovery() throws Exception { |
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49 | final int REPLICATION = 3; |
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50 | Configuration conf = new Configuration(); |
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51 | conf.setInt("dfs.datanode.handler.count", 1); |
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52 | conf.setInt("dfs.replication", REPLICATION); |
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53 | MiniDFSCluster cluster = new MiniDFSCluster(conf, REPLICATION, true, null); |
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54 | |
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55 | try { |
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56 | final FileSystem fs = cluster.getFileSystem(); |
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57 | final Path dir = new Path("/wrwelkj"); |
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58 | |
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59 | SlowWriter[] slowwriters = new SlowWriter[10]; |
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60 | for(int i = 0; i < slowwriters.length; i++) { |
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61 | slowwriters[i] = new SlowWriter(fs, new Path(dir, "file" + i)); |
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62 | } |
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63 | |
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64 | try { |
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65 | for(int i = 0; i < slowwriters.length; i++) { |
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66 | slowwriters[i].start(); |
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67 | } |
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68 | |
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69 | Thread.sleep(1000); // let writers get started |
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70 | |
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71 | //stop a datanode, it should have least recover. |
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72 | cluster.stopDataNode(AppendTestUtil.nextInt(REPLICATION)); |
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73 | |
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74 | //let the slow writer writes a few more seconds |
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75 | System.out.println("Wait a few seconds"); |
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76 | Thread.sleep(5000); |
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77 | } |
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78 | finally { |
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79 | for(int i = 0; i < slowwriters.length; i++) { |
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80 | if (slowwriters[i] != null) { |
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81 | slowwriters[i].running = false; |
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82 | slowwriters[i].interrupt(); |
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83 | } |
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84 | } |
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85 | for(int i = 0; i < slowwriters.length; i++) { |
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86 | if (slowwriters[i] != null) { |
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87 | slowwriters[i].join(); |
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88 | } |
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89 | } |
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90 | } |
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91 | |
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92 | //Verify the file |
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93 | System.out.println("Verify the file"); |
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94 | for(int i = 0; i < slowwriters.length; i++) { |
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95 | System.out.println(slowwriters[i].filepath + ": length=" |
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96 | + fs.getFileStatus(slowwriters[i].filepath).getLen()); |
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97 | FSDataInputStream in = null; |
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98 | try { |
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99 | in = fs.open(slowwriters[i].filepath); |
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100 | for(int j = 0, x; (x = in.read()) != -1; j++) { |
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101 | assertEquals(j, x); |
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102 | } |
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103 | } |
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104 | finally { |
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105 | IOUtils.closeStream(in); |
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106 | } |
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107 | } |
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108 | } finally { |
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109 | if (cluster != null) {cluster.shutdown();} |
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110 | } |
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111 | } |
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112 | |
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113 | static class SlowWriter extends Thread { |
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114 | final FileSystem fs; |
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115 | final Path filepath; |
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116 | boolean running = true; |
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117 | |
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118 | SlowWriter(FileSystem fs, Path filepath) { |
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119 | super(SlowWriter.class.getSimpleName() + ":" + filepath); |
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120 | this.fs = fs; |
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121 | this.filepath = filepath; |
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122 | } |
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123 | |
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124 | public void run() { |
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125 | FSDataOutputStream out = null; |
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126 | int i = 0; |
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127 | try { |
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128 | out = fs.create(filepath); |
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129 | for(; running; i++) { |
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130 | System.out.println(getName() + " writes " + i); |
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131 | out.write(i); |
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132 | out.sync(); |
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133 | sleep(100); |
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134 | } |
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135 | } |
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136 | catch(Exception e) { |
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137 | System.out.println(getName() + " dies: e=" + e); |
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138 | } |
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139 | finally { |
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140 | System.out.println(getName() + ": i=" + i); |
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141 | IOUtils.closeStream(out); |
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142 | } |
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143 | } |
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144 | } |
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145 | } |
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