[120] | 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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