[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.server.namenode; |
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| 19 | |
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| 20 | import junit.framework.TestCase; |
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| 21 | import java.io.*; |
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| 22 | import java.util.Random; |
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| 23 | import org.apache.hadoop.conf.Configuration; |
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| 24 | import org.apache.hadoop.hdfs.MiniDFSCluster; |
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| 25 | import org.apache.hadoop.fs.FSDataOutputStream; |
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| 26 | import org.apache.hadoop.fs.FileSystem; |
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| 27 | import org.apache.hadoop.fs.FileUtil; |
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| 28 | import org.apache.hadoop.fs.Path; |
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| 29 | |
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| 30 | /** |
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| 31 | * This class tests various combinations of dfs.name.dir |
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| 32 | * and dfs.name.edits.dir configurations. |
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| 33 | */ |
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| 34 | public class TestNameEditsConfigs extends TestCase { |
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| 35 | static final long SEED = 0xDEADBEEFL; |
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| 36 | static final int BLOCK_SIZE = 4096; |
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| 37 | static final int FILE_SIZE = 8192; |
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| 38 | static final int NUM_DATA_NODES = 3; |
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| 39 | static final String FILE_IMAGE = "current/fsimage"; |
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| 40 | static final String FILE_EDITS = "current/edits"; |
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| 41 | |
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| 42 | short replication = 3; |
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| 43 | private File base_dir = new File( |
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| 44 | System.getProperty("test.build.data", "build/test/data"), "dfs/"); |
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| 45 | |
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| 46 | protected void setUp() throws java.lang.Exception { |
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| 47 | if(base_dir.exists()) |
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| 48 | tearDown(); |
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| 49 | } |
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| 50 | |
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| 51 | protected void tearDown() throws java.lang.Exception { |
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| 52 | if (!FileUtil.fullyDelete(base_dir)) |
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| 53 | throw new IOException("Cannot remove directory " + base_dir); |
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| 54 | } |
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| 55 | |
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| 56 | private void writeFile(FileSystem fileSys, Path name, int repl) |
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| 57 | throws IOException { |
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| 58 | FSDataOutputStream stm = fileSys.create(name, true, |
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| 59 | fileSys.getConf().getInt("io.file.buffer.size", 4096), |
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| 60 | (short)repl, (long)BLOCK_SIZE); |
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| 61 | byte[] buffer = new byte[FILE_SIZE]; |
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| 62 | Random rand = new Random(SEED); |
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| 63 | rand.nextBytes(buffer); |
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| 64 | stm.write(buffer); |
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| 65 | stm.close(); |
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| 66 | } |
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| 67 | |
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| 68 | void checkImageAndEditsFilesExistence(File dir, |
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| 69 | boolean imageMustExist, |
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| 70 | boolean editsMustExist) { |
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| 71 | assertTrue(imageMustExist == new File(dir, FILE_IMAGE).exists()); |
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| 72 | assertTrue(editsMustExist == new File(dir, FILE_EDITS).exists()); |
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| 73 | } |
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| 74 | |
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| 75 | private void checkFile(FileSystem fileSys, Path name, int repl) |
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| 76 | throws IOException { |
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| 77 | assertTrue(fileSys.exists(name)); |
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| 78 | int replication = fileSys.getFileStatus(name).getReplication(); |
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| 79 | assertEquals("replication for " + name, repl, replication); |
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| 80 | long size = fileSys.getContentSummary(name).getLength(); |
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| 81 | assertEquals("file size for " + name, size, (long)FILE_SIZE); |
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| 82 | } |
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| 83 | |
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| 84 | private void cleanupFile(FileSystem fileSys, Path name) |
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| 85 | throws IOException { |
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| 86 | assertTrue(fileSys.exists(name)); |
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| 87 | fileSys.delete(name, true); |
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| 88 | assertTrue(!fileSys.exists(name)); |
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| 89 | } |
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| 90 | |
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| 91 | SecondaryNameNode startSecondaryNameNode(Configuration conf |
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| 92 | ) throws IOException { |
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| 93 | conf.set("dfs.secondary.http.address", "0.0.0.0:0"); |
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| 94 | return new SecondaryNameNode(conf); |
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| 95 | } |
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| 96 | |
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| 97 | /** |
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| 98 | * Test various configuration options of dfs.name.dir and dfs.name.edits.dir |
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| 99 | * The test creates files and restarts cluster with different configs. |
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| 100 | * 1. Starts cluster with shared name and edits dirs |
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| 101 | * 2. Restarts cluster by adding additional (different) name and edits dirs |
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| 102 | * 3. Restarts cluster by removing shared name and edits dirs by allowing to |
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| 103 | * start using separate name and edits dirs |
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| 104 | * 4. Restart cluster by adding shared directory again, but make sure we |
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| 105 | * do not read any stale image or edits. |
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| 106 | * All along the test, we create and delete files at reach restart to make |
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| 107 | * sure we are reading proper edits and image. |
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| 108 | */ |
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| 109 | public void testNameEditsConfigs() throws IOException { |
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| 110 | Path file1 = new Path("TestNameEditsConfigs1"); |
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| 111 | Path file2 = new Path("TestNameEditsConfigs2"); |
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| 112 | Path file3 = new Path("TestNameEditsConfigs3"); |
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| 113 | MiniDFSCluster cluster = null; |
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| 114 | SecondaryNameNode secondary = null; |
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| 115 | Configuration conf = null; |
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| 116 | FileSystem fileSys = null; |
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| 117 | File newNameDir = new File(base_dir, "name"); |
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| 118 | File newEditsDir = new File(base_dir, "edits"); |
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| 119 | File nameAndEdits = new File(base_dir, "name_and_edits"); |
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| 120 | File checkpointNameDir = new File(base_dir, "secondname"); |
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| 121 | File checkpointEditsDir = new File(base_dir, "secondedits"); |
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| 122 | File checkpointNameAndEdits = new File(base_dir, "second_name_and_edits"); |
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| 123 | |
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| 124 | // Start namenode with same dfs.name.dir and dfs.name.edits.dir |
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| 125 | conf = new Configuration(); |
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| 126 | conf.set("dfs.name.dir", nameAndEdits.getPath()); |
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| 127 | conf.set("dfs.name.edits.dir", nameAndEdits.getPath()); |
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| 128 | conf.set("fs.checkpoint.dir", checkpointNameAndEdits.getPath()); |
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| 129 | conf.set("fs.checkpoint.edits.dir", checkpointNameAndEdits.getPath()); |
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| 130 | replication = (short)conf.getInt("dfs.replication", 3); |
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| 131 | // Manage our own dfs directories |
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| 132 | cluster = new MiniDFSCluster(0, conf, NUM_DATA_NODES, true, false, true, null, |
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| 133 | null, null, null); |
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| 134 | cluster.waitActive(); |
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| 135 | secondary = startSecondaryNameNode(conf); |
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| 136 | fileSys = cluster.getFileSystem(); |
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| 137 | |
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| 138 | try { |
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| 139 | assertTrue(!fileSys.exists(file1)); |
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| 140 | writeFile(fileSys, file1, replication); |
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| 141 | checkFile(fileSys, file1, replication); |
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| 142 | secondary.doCheckpoint(); |
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| 143 | } finally { |
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| 144 | fileSys.close(); |
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| 145 | cluster.shutdown(); |
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| 146 | secondary.shutdown(); |
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| 147 | } |
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| 148 | |
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| 149 | // Start namenode with additional dfs.name.dir and dfs.name.edits.dir |
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| 150 | conf = new Configuration(); |
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| 151 | assertTrue(newNameDir.mkdir()); |
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| 152 | assertTrue(newEditsDir.mkdir()); |
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| 153 | |
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| 154 | conf.set("dfs.name.dir", nameAndEdits.getPath() + |
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| 155 | "," + newNameDir.getPath()); |
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| 156 | conf.set("dfs.name.edits.dir", nameAndEdits.getPath() + |
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| 157 | "," + newEditsDir.getPath()); |
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| 158 | conf.set("fs.checkpoint.dir", checkpointNameDir.getPath() + |
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| 159 | "," + checkpointNameAndEdits.getPath()); |
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| 160 | conf.set("fs.checkpoint.edits.dir", checkpointEditsDir.getPath() + |
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| 161 | "," + checkpointNameAndEdits.getPath()); |
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| 162 | replication = (short)conf.getInt("dfs.replication", 3); |
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| 163 | // Manage our own dfs directories. Do not format. |
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| 164 | cluster = new MiniDFSCluster(0, conf, NUM_DATA_NODES, false, false, true, |
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| 165 | null, null, null, null); |
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| 166 | cluster.waitActive(); |
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| 167 | secondary = startSecondaryNameNode(conf); |
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| 168 | fileSys = cluster.getFileSystem(); |
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| 169 | |
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| 170 | try { |
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| 171 | assertTrue(fileSys.exists(file1)); |
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| 172 | checkFile(fileSys, file1, replication); |
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| 173 | cleanupFile(fileSys, file1); |
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| 174 | writeFile(fileSys, file2, replication); |
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| 175 | checkFile(fileSys, file2, replication); |
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| 176 | secondary.doCheckpoint(); |
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| 177 | } finally { |
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| 178 | fileSys.close(); |
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| 179 | cluster.shutdown(); |
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| 180 | secondary.shutdown(); |
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| 181 | } |
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| 182 | |
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| 183 | checkImageAndEditsFilesExistence(nameAndEdits, true, true); |
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| 184 | checkImageAndEditsFilesExistence(newNameDir, true, false); |
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| 185 | checkImageAndEditsFilesExistence(newEditsDir, false, true); |
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| 186 | checkImageAndEditsFilesExistence(checkpointNameAndEdits, true, true); |
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| 187 | checkImageAndEditsFilesExistence(checkpointNameDir, true, false); |
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| 188 | checkImageAndEditsFilesExistence(checkpointEditsDir, false, true); |
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| 189 | |
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| 190 | // Now remove common directory both have and start namenode with |
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| 191 | // separate name and edits dirs |
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| 192 | new File(nameAndEdits, FILE_EDITS).renameTo( |
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| 193 | new File(newNameDir, FILE_EDITS)); |
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| 194 | new File(nameAndEdits, FILE_IMAGE).renameTo( |
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| 195 | new File(newEditsDir, FILE_IMAGE)); |
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| 196 | new File(checkpointNameAndEdits, FILE_EDITS).renameTo( |
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| 197 | new File(checkpointNameDir, FILE_EDITS)); |
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| 198 | new File(checkpointNameAndEdits, FILE_IMAGE).renameTo( |
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| 199 | new File(checkpointEditsDir, FILE_IMAGE)); |
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| 200 | conf = new Configuration(); |
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| 201 | conf.set("dfs.name.dir", newNameDir.getPath()); |
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| 202 | conf.set("dfs.name.edits.dir", newEditsDir.getPath()); |
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| 203 | conf.set("fs.checkpoint.dir", checkpointNameDir.getPath()); |
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| 204 | conf.set("fs.checkpoint.edits.dir", checkpointEditsDir.getPath()); |
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| 205 | replication = (short)conf.getInt("dfs.replication", 3); |
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| 206 | cluster = new MiniDFSCluster(0, conf, NUM_DATA_NODES, false, false, true, |
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| 207 | null, null, null, null); |
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| 208 | cluster.waitActive(); |
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| 209 | secondary = startSecondaryNameNode(conf); |
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| 210 | fileSys = cluster.getFileSystem(); |
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| 211 | |
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| 212 | try { |
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| 213 | assertTrue(!fileSys.exists(file1)); |
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| 214 | assertTrue(fileSys.exists(file2)); |
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| 215 | checkFile(fileSys, file2, replication); |
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| 216 | cleanupFile(fileSys, file2); |
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| 217 | writeFile(fileSys, file3, replication); |
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| 218 | checkFile(fileSys, file3, replication); |
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| 219 | secondary.doCheckpoint(); |
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| 220 | } finally { |
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| 221 | fileSys.close(); |
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| 222 | cluster.shutdown(); |
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| 223 | secondary.shutdown(); |
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| 224 | } |
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| 225 | |
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| 226 | checkImageAndEditsFilesExistence(newNameDir, true, false); |
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| 227 | checkImageAndEditsFilesExistence(newEditsDir, false, true); |
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| 228 | checkImageAndEditsFilesExistence(checkpointNameDir, true, false); |
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| 229 | checkImageAndEditsFilesExistence(checkpointEditsDir, false, true); |
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| 230 | |
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| 231 | // Add old name_and_edits dir. File system should not read image or edits |
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| 232 | // from old dir |
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| 233 | assertTrue(FileUtil.fullyDelete(new File(nameAndEdits, "current"))); |
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| 234 | assertTrue(FileUtil.fullyDelete(new File(checkpointNameAndEdits, "current"))); |
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| 235 | conf = new Configuration(); |
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| 236 | conf.set("dfs.name.dir", nameAndEdits.getPath() + |
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| 237 | "," + newNameDir.getPath()); |
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| 238 | conf.set("dfs.name.edits.dir", nameAndEdits + |
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| 239 | "," + newEditsDir.getPath()); |
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| 240 | conf.set("fs.checkpoint.dir", checkpointNameDir.getPath() + |
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| 241 | "," + checkpointNameAndEdits.getPath()); |
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| 242 | conf.set("fs.checkpoint.edits.dir", checkpointEditsDir.getPath() + |
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| 243 | "," + checkpointNameAndEdits.getPath()); |
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| 244 | replication = (short)conf.getInt("dfs.replication", 3); |
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| 245 | cluster = new MiniDFSCluster(0, conf, NUM_DATA_NODES, false, false, true, |
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| 246 | null, null, null, null); |
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| 247 | cluster.waitActive(); |
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| 248 | secondary = startSecondaryNameNode(conf); |
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| 249 | fileSys = cluster.getFileSystem(); |
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| 250 | |
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| 251 | try { |
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| 252 | assertTrue(!fileSys.exists(file1)); |
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| 253 | assertTrue(!fileSys.exists(file2)); |
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| 254 | assertTrue(fileSys.exists(file3)); |
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| 255 | checkFile(fileSys, file3, replication); |
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| 256 | secondary.doCheckpoint(); |
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| 257 | } finally { |
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| 258 | fileSys.close(); |
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| 259 | cluster.shutdown(); |
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| 260 | secondary.shutdown(); |
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| 261 | } |
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| 262 | checkImageAndEditsFilesExistence(nameAndEdits, true, true); |
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| 263 | checkImageAndEditsFilesExistence(checkpointNameAndEdits, true, true); |
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| 264 | } |
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| 265 | |
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| 266 | /** |
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| 267 | * Test various configuration options of dfs.name.dir and dfs.name.edits.dir |
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| 268 | * This test tries to simulate failure scenarios. |
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| 269 | * 1. Start cluster with shared name and edits dir |
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| 270 | * 2. Restart cluster by adding separate name and edits dirs |
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| 271 | * 3. Restart cluster by removing shared name and edits dir |
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| 272 | * 4. Restart cluster with old shared name and edits dir, but only latest |
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| 273 | * name dir. This should fail since we dont have latest edits dir |
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| 274 | * 5. Restart cluster with old shared name and edits dir, but only latest |
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| 275 | * edits dir. This should fail since we dont have latest name dir |
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| 276 | */ |
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| 277 | public void testNameEditsConfigsFailure() throws IOException { |
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| 278 | Path file1 = new Path("TestNameEditsConfigs1"); |
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| 279 | Path file2 = new Path("TestNameEditsConfigs2"); |
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| 280 | Path file3 = new Path("TestNameEditsConfigs3"); |
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| 281 | MiniDFSCluster cluster = null; |
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| 282 | Configuration conf = null; |
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| 283 | FileSystem fileSys = null; |
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| 284 | File newNameDir = new File(base_dir, "name"); |
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| 285 | File newEditsDir = new File(base_dir, "edits"); |
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| 286 | File nameAndEdits = new File(base_dir, "name_and_edits"); |
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| 287 | |
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| 288 | // Start namenode with same dfs.name.dir and dfs.name.edits.dir |
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| 289 | conf = new Configuration(); |
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| 290 | conf.set("dfs.name.dir", nameAndEdits.getPath()); |
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| 291 | conf.set("dfs.name.edits.dir", nameAndEdits.getPath()); |
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| 292 | replication = (short)conf.getInt("dfs.replication", 3); |
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| 293 | // Manage our own dfs directories |
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| 294 | cluster = new MiniDFSCluster(0, conf, NUM_DATA_NODES, true, false, true, null, |
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| 295 | null, null, null); |
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| 296 | cluster.waitActive(); |
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| 297 | fileSys = cluster.getFileSystem(); |
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| 298 | |
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| 299 | try { |
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| 300 | assertTrue(!fileSys.exists(file1)); |
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| 301 | writeFile(fileSys, file1, replication); |
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| 302 | checkFile(fileSys, file1, replication); |
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| 303 | } finally { |
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| 304 | fileSys.close(); |
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| 305 | cluster.shutdown(); |
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| 306 | } |
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| 307 | |
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| 308 | // Start namenode with additional dfs.name.dir and dfs.name.edits.dir |
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| 309 | conf = new Configuration(); |
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| 310 | assertTrue(newNameDir.mkdir()); |
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| 311 | assertTrue(newEditsDir.mkdir()); |
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| 312 | |
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| 313 | conf.set("dfs.name.dir", nameAndEdits.getPath() + |
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| 314 | "," + newNameDir.getPath()); |
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| 315 | conf.set("dfs.name.edits.dir", nameAndEdits.getPath() + |
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| 316 | "," + newEditsDir.getPath()); |
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| 317 | replication = (short)conf.getInt("dfs.replication", 3); |
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| 318 | // Manage our own dfs directories. Do not format. |
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| 319 | cluster = new MiniDFSCluster(0, conf, NUM_DATA_NODES, false, false, true, |
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| 320 | null, null, null, null); |
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| 321 | cluster.waitActive(); |
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| 322 | fileSys = cluster.getFileSystem(); |
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| 323 | |
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| 324 | try { |
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| 325 | assertTrue(fileSys.exists(file1)); |
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| 326 | checkFile(fileSys, file1, replication); |
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| 327 | cleanupFile(fileSys, file1); |
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| 328 | writeFile(fileSys, file2, replication); |
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| 329 | checkFile(fileSys, file2, replication); |
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| 330 | } finally { |
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| 331 | fileSys.close(); |
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| 332 | cluster.shutdown(); |
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| 333 | } |
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| 334 | |
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| 335 | // Now remove common directory both have and start namenode with |
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| 336 | // separate name and edits dirs |
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| 337 | conf = new Configuration(); |
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| 338 | conf.set("dfs.name.dir", newNameDir.getPath()); |
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| 339 | conf.set("dfs.name.edits.dir", newEditsDir.getPath()); |
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| 340 | replication = (short)conf.getInt("dfs.replication", 3); |
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| 341 | cluster = new MiniDFSCluster(0, conf, NUM_DATA_NODES, false, false, true, |
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| 342 | null, null, null, null); |
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| 343 | cluster.waitActive(); |
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| 344 | fileSys = cluster.getFileSystem(); |
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| 345 | |
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| 346 | try { |
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| 347 | assertTrue(!fileSys.exists(file1)); |
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| 348 | assertTrue(fileSys.exists(file2)); |
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| 349 | checkFile(fileSys, file2, replication); |
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| 350 | cleanupFile(fileSys, file2); |
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| 351 | writeFile(fileSys, file3, replication); |
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| 352 | checkFile(fileSys, file3, replication); |
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| 353 | } finally { |
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| 354 | fileSys.close(); |
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| 355 | cluster.shutdown(); |
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| 356 | } |
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| 357 | |
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| 358 | // Add old shared directory for name and edits along with latest name |
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| 359 | conf = new Configuration(); |
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| 360 | conf.set("dfs.name.dir", newNameDir.getPath() + "," + |
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| 361 | nameAndEdits.getPath()); |
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| 362 | conf.set("dfs.name.edits.dir", nameAndEdits.getPath()); |
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| 363 | replication = (short)conf.getInt("dfs.replication", 3); |
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| 364 | try { |
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| 365 | cluster = new MiniDFSCluster(0, conf, NUM_DATA_NODES, false, false, true, |
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| 366 | null, null, null, null); |
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| 367 | assertTrue(false); |
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| 368 | } catch (IOException e) { // expect to fail |
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| 369 | System.out.println("cluster start failed due to missing " + |
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| 370 | "latest edits dir"); |
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| 371 | } finally { |
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| 372 | cluster = null; |
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| 373 | } |
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| 374 | |
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| 375 | // Add old shared directory for name and edits along with latest edits |
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| 376 | conf = new Configuration(); |
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| 377 | conf.set("dfs.name.dir", nameAndEdits.getPath()); |
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| 378 | conf.set("dfs.name.edits.dir", newEditsDir.getPath() + |
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| 379 | "," + nameAndEdits.getPath()); |
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| 380 | replication = (short)conf.getInt("dfs.replication", 3); |
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| 381 | try { |
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| 382 | cluster = new MiniDFSCluster(0, conf, NUM_DATA_NODES, false, false, true, |
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| 383 | null, null, null, null); |
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| 384 | assertTrue(false); |
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| 385 | } catch (IOException e) { // expect to fail |
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| 386 | System.out.println("cluster start failed due to missing latest name dir"); |
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| 387 | } finally { |
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| 388 | cluster = null; |
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| 389 | } |
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| 390 | } |
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| 391 | } |
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