[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 | |
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| 19 | package org.apache.hadoop.mapred; |
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| 20 | |
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| 21 | import java.io.IOException; |
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| 22 | |
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| 23 | import junit.framework.TestCase; |
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| 24 | |
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| 25 | import org.apache.commons.logging.Log; |
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| 26 | import org.apache.commons.logging.LogFactory; |
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| 27 | import org.apache.hadoop.conf.Configuration; |
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| 28 | import org.apache.hadoop.fs.FSDataOutputStream; |
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| 29 | import org.apache.hadoop.fs.FileSystem; |
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| 30 | import org.apache.hadoop.fs.Path; |
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| 31 | import org.apache.hadoop.hdfs.MiniDFSCluster; |
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| 32 | import org.apache.hadoop.mapred.JobTracker.RecoveryManager; |
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| 33 | import org.apache.hadoop.mapred.MiniMRCluster.JobTrackerRunner; |
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| 34 | import org.apache.hadoop.mapred.TestJobInProgressListener.MyScheduler; |
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| 35 | import org.apache.hadoop.security.UserGroupInformation; |
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| 36 | |
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| 37 | /** |
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| 38 | * Test whether the {@link RecoveryManager} is able to tolerate job-recovery |
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| 39 | * failures and the jobtracker is able to tolerate {@link RecoveryManager} |
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| 40 | * failure. |
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| 41 | */ |
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| 42 | public class TestRecoveryManager extends TestCase { |
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| 43 | private static final Log LOG = |
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| 44 | LogFactory.getLog(TestRecoveryManager.class); |
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| 45 | private static final Path TEST_DIR = |
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| 46 | new Path(System.getProperty("test.build.data", "/tmp"), |
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| 47 | "test-recovery-manager"); |
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| 48 | |
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| 49 | /** |
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| 50 | * Tests the {@link JobTracker} against the exceptions thrown in |
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| 51 | * {@link JobTracker.RecoveryManager}. It does the following : |
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| 52 | * - submits 2 jobs |
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| 53 | * - kills the jobtracker |
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| 54 | * - Garble job.xml for one job causing it to fail in constructor |
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| 55 | * and job.split for another causing it to fail in init. |
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| 56 | * - restarts the jobtracker |
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| 57 | * - checks if the jobtraker starts normally |
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| 58 | */ |
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| 59 | public void testJobTracker() throws Exception { |
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| 60 | LOG.info("Testing jobtracker restart with faulty job"); |
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| 61 | String signalFile = new Path(TEST_DIR, "signal").toString(); |
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| 62 | JobConf conf = new JobConf(); |
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| 63 | |
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| 64 | FileSystem fs = FileSystem.get(new Configuration()); |
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| 65 | fs.delete(TEST_DIR, true); // cleanup |
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| 66 | |
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| 67 | conf.set("mapred.jobtracker.job.history.block.size", "1024"); |
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| 68 | conf.set("mapred.jobtracker.job.history.buffer.size", "1024"); |
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| 69 | |
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| 70 | MiniMRCluster mr = new MiniMRCluster(1, "file:///", 1, null, null, conf); |
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| 71 | |
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| 72 | JobConf job1 = mr.createJobConf(); |
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| 73 | |
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| 74 | UtilsForTests.configureWaitingJobConf(job1, |
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| 75 | new Path(TEST_DIR, "input"), new Path(TEST_DIR, "output1"), 2, 0, |
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| 76 | "test-recovery-manager", signalFile, signalFile); |
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| 77 | |
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| 78 | // submit the faulty job |
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| 79 | RunningJob rJob1 = (new JobClient(job1)).submitJob(job1); |
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| 80 | LOG.info("Submitted job " + rJob1.getID()); |
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| 81 | |
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| 82 | while (rJob1.mapProgress() < 0.5f) { |
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| 83 | LOG.info("Waiting for job " + rJob1.getID() + " to be 50% done"); |
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| 84 | UtilsForTests.waitFor(100); |
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| 85 | } |
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| 86 | |
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| 87 | JobConf job2 = mr.createJobConf(); |
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| 88 | |
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| 89 | UtilsForTests.configureWaitingJobConf(job2, |
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| 90 | new Path(TEST_DIR, "input"), new Path(TEST_DIR, "output2"), 30, 0, |
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| 91 | "test-recovery-manager", signalFile, signalFile); |
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| 92 | |
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| 93 | // submit the faulty job |
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| 94 | RunningJob rJob2 = (new JobClient(job2)).submitJob(job2); |
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| 95 | LOG.info("Submitted job " + rJob2.getID()); |
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| 96 | |
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| 97 | while (rJob2.mapProgress() < 0.5f) { |
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| 98 | LOG.info("Waiting for job " + rJob2.getID() + " to be 50% done"); |
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| 99 | UtilsForTests.waitFor(100); |
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| 100 | } |
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| 101 | |
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| 102 | // kill the jobtracker |
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| 103 | LOG.info("Stopping jobtracker"); |
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| 104 | String sysDir = mr.getJobTrackerRunner().getJobTracker().getSystemDir(); |
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| 105 | mr.stopJobTracker(); |
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| 106 | |
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| 107 | // delete the job.xml of job #1 causing the job to fail in constructor |
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| 108 | Path jobFile = |
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| 109 | new Path(sysDir, rJob1.getID().toString() + Path.SEPARATOR + "job.xml"); |
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| 110 | LOG.info("Deleting job.xml file : " + jobFile.toString()); |
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| 111 | fs.delete(jobFile, false); // delete the job.xml file |
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| 112 | |
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| 113 | // create the job.xml file with 0 bytes |
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| 114 | FSDataOutputStream out = fs.create(jobFile); |
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| 115 | out.write(1); |
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| 116 | out.close(); |
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| 117 | |
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| 118 | // delete the job.split of job #2 causing the job to fail in initTasks |
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| 119 | Path jobSplitFile = |
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| 120 | new Path(sysDir, rJob2.getID().toString() + Path.SEPARATOR + "job.split"); |
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| 121 | LOG.info("Deleting job.split file : " + jobSplitFile.toString()); |
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| 122 | fs.delete(jobSplitFile, false); // delete the job.split file |
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| 123 | |
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| 124 | // create the job.split file with 0 bytes |
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| 125 | out = fs.create(jobSplitFile); |
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| 126 | out.write(1); |
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| 127 | out.close(); |
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| 128 | |
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| 129 | // make sure that the jobtracker is in recovery mode |
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| 130 | mr.getJobTrackerConf().setBoolean("mapred.jobtracker.restart.recover", |
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| 131 | true); |
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| 132 | // start the jobtracker |
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| 133 | LOG.info("Starting jobtracker"); |
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| 134 | mr.startJobTracker(); |
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| 135 | ClusterStatus status = |
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| 136 | mr.getJobTrackerRunner().getJobTracker().getClusterStatus(false); |
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| 137 | |
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| 138 | // check if the jobtracker came up or not |
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| 139 | assertEquals("JobTracker crashed!", |
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| 140 | JobTracker.State.RUNNING, status.getJobTrackerState()); |
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| 141 | |
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| 142 | mr.shutdown(); |
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| 143 | } |
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| 144 | |
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| 145 | /** |
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| 146 | * Tests the {@link JobTracker.RecoveryManager} against the exceptions thrown |
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| 147 | * during recovery. It does the following : |
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| 148 | * - submits a job with HIGH priority and x tasks |
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| 149 | * - allows it to complete 50% |
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| 150 | * - submits another job with normal priority and y tasks |
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| 151 | * - kills the jobtracker |
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| 152 | * - restarts the jobtracker with max-tasks-per-job such that |
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| 153 | * y < max-tasks-per-job < x |
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| 154 | * - checks if the jobtraker starts normally and job#2 is recovered while |
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| 155 | * job#1 is failed. |
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| 156 | */ |
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| 157 | public void testRecoveryManager() throws Exception { |
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| 158 | LOG.info("Testing recovery-manager"); |
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| 159 | String signalFile = new Path(TEST_DIR, "signal").toString(); |
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| 160 | |
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| 161 | // clean up |
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| 162 | FileSystem fs = FileSystem.get(new Configuration()); |
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| 163 | fs.delete(TEST_DIR, true); |
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| 164 | |
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| 165 | JobConf conf = new JobConf(); |
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| 166 | conf.set("mapred.jobtracker.job.history.block.size", "1024"); |
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| 167 | conf.set("mapred.jobtracker.job.history.buffer.size", "1024"); |
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| 168 | |
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| 169 | MiniMRCluster mr = new MiniMRCluster(1, "file:///", 1, null, null, conf); |
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| 170 | JobTracker jobtracker = mr.getJobTrackerRunner().getJobTracker(); |
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| 171 | |
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| 172 | JobConf job1 = mr.createJobConf(); |
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| 173 | // set the high priority |
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| 174 | job1.setJobPriority(JobPriority.HIGH); |
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| 175 | |
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| 176 | UtilsForTests.configureWaitingJobConf(job1, |
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| 177 | new Path(TEST_DIR, "input"), new Path(TEST_DIR, "output3"), 30, 0, |
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| 178 | "test-recovery-manager", signalFile, signalFile); |
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| 179 | |
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| 180 | // submit the faulty job |
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| 181 | JobClient jc = new JobClient(job1); |
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| 182 | RunningJob rJob1 = jc.submitJob(job1); |
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| 183 | LOG.info("Submitted first job " + rJob1.getID()); |
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| 184 | |
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| 185 | while (rJob1.mapProgress() < 0.5f) { |
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| 186 | LOG.info("Waiting for job " + rJob1.getID() + " to be 50% done"); |
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| 187 | UtilsForTests.waitFor(100); |
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| 188 | } |
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| 189 | |
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| 190 | // now submit job2 |
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| 191 | JobConf job2 = mr.createJobConf(); |
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| 192 | |
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| 193 | String signalFile1 = new Path(TEST_DIR, "signal1").toString(); |
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| 194 | UtilsForTests.configureWaitingJobConf(job2, |
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| 195 | new Path(TEST_DIR, "input"), new Path(TEST_DIR, "output4"), 20, 0, |
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| 196 | "test-recovery-manager", signalFile1, signalFile1); |
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| 197 | |
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| 198 | // submit the job |
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| 199 | RunningJob rJob2 = (new JobClient(job2)).submitJob(job2); |
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| 200 | LOG.info("Submitted job " + rJob2.getID()); |
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| 201 | |
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| 202 | // wait for it to init |
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| 203 | JobInProgress jip = jobtracker.getJob(rJob2.getID()); |
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| 204 | |
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| 205 | while (!jip.inited()) { |
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| 206 | LOG.info("Waiting for job " + jip.getJobID() + " to be inited"); |
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| 207 | UtilsForTests.waitFor(100); |
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| 208 | } |
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| 209 | |
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| 210 | // now submit job3 with inappropriate acls |
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| 211 | JobConf job3 = mr.createJobConf(); |
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| 212 | job3.set("hadoop.job.ugi","abc,users"); |
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| 213 | |
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| 214 | UtilsForTests.configureWaitingJobConf(job3, |
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| 215 | new Path(TEST_DIR, "input"), new Path(TEST_DIR, "output5"), 1, 0, |
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| 216 | "test-recovery-manager", signalFile, signalFile); |
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| 217 | |
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| 218 | // submit the job |
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| 219 | RunningJob rJob3 = (new JobClient(job3)).submitJob(job3); |
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| 220 | LOG.info("Submitted job " + rJob3.getID() + " with different user"); |
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| 221 | |
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| 222 | jip = jobtracker.getJob(rJob3.getID()); |
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| 223 | |
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| 224 | while (!jip.inited()) { |
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| 225 | LOG.info("Waiting for job " + jip.getJobID() + " to be inited"); |
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| 226 | UtilsForTests.waitFor(100); |
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| 227 | } |
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| 228 | |
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| 229 | // kill the jobtracker |
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| 230 | LOG.info("Stopping jobtracker"); |
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| 231 | mr.stopJobTracker(); |
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| 232 | |
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| 233 | // make sure that the jobtracker is in recovery mode |
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| 234 | mr.getJobTrackerConf().setBoolean("mapred.jobtracker.restart.recover", |
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| 235 | true); |
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| 236 | mr.getJobTrackerConf().setInt("mapred.jobtracker.maxtasks.per.job", 25); |
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| 237 | |
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| 238 | mr.getJobTrackerConf().setBoolean("mapred.acls.enabled" , true); |
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| 239 | UserGroupInformation ugi = UserGroupInformation.readFrom(job1); |
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| 240 | mr.getJobTrackerConf().set("mapred.queue.default.acl-submit-job", |
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| 241 | ugi.getUserName()); |
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| 242 | |
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| 243 | // start the jobtracker |
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| 244 | LOG.info("Starting jobtracker"); |
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| 245 | mr.startJobTracker(); |
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| 246 | UtilsForTests.waitForJobTracker(jc); |
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| 247 | |
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| 248 | jobtracker = mr.getJobTrackerRunner().getJobTracker(); |
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| 249 | |
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| 250 | // assert that job2 is recovered by the jobtracker as job1 would fail |
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| 251 | assertEquals("Recovery manager failed to tolerate job failures", |
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| 252 | 2, jobtracker.getAllJobs().length); |
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| 253 | |
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| 254 | // check if the job#1 has failed |
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| 255 | JobStatus status = jobtracker.getJobStatus(rJob1.getID()); |
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| 256 | assertEquals("Faulty job not failed", |
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| 257 | JobStatus.FAILED, status.getRunState()); |
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| 258 | |
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| 259 | jip = jobtracker.getJob(rJob2.getID()); |
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| 260 | assertFalse("Job should be running", jip.isComplete()); |
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| 261 | |
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| 262 | status = jobtracker.getJobStatus(rJob3.getID()); |
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| 263 | assertNull("Job should be missing", status); |
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| 264 | |
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| 265 | mr.shutdown(); |
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| 266 | } |
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| 267 | |
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| 268 | /** |
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| 269 | * Test if restart count of the jobtracker is correctly managed. |
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| 270 | * Steps are as follows : |
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| 271 | * - start the jobtracker and check if the info file gets created. |
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| 272 | * - stops the jobtracker, deletes the jobtracker.info file and checks if |
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| 273 | * upon restart the recovery is 'off' |
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| 274 | * - submit a job to the jobtracker. |
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| 275 | * - restart the jobtracker k times and check if the restart count on ith |
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| 276 | * iteration is i. |
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| 277 | * - submit a new job and check if its restart count is 0. |
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| 278 | * - garble the jobtracker.info file and restart he jobtracker, the |
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| 279 | * jobtracker should crash. |
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| 280 | */ |
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| 281 | public void testRestartCount() throws Exception { |
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| 282 | LOG.info("Testing restart-count"); |
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| 283 | String signalFile = new Path(TEST_DIR, "signal").toString(); |
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| 284 | |
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| 285 | // clean up |
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| 286 | FileSystem fs = FileSystem.get(new Configuration()); |
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| 287 | fs.delete(TEST_DIR, true); |
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| 288 | |
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| 289 | JobConf conf = new JobConf(); |
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| 290 | conf.set("mapred.jobtracker.job.history.block.size", "1024"); |
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| 291 | conf.set("mapred.jobtracker.job.history.buffer.size", "1024"); |
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| 292 | conf.setBoolean("mapred.jobtracker.restart.recover", true); |
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| 293 | // since there is no need for initing |
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| 294 | conf.setClass("mapred.jobtracker.taskScheduler", MyScheduler.class, |
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| 295 | TaskScheduler.class); |
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| 296 | |
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| 297 | MiniMRCluster mr = new MiniMRCluster(1, "file:///", 1, null, null, conf); |
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| 298 | JobTracker jobtracker = mr.getJobTrackerRunner().getJobTracker(); |
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| 299 | JobClient jc = new JobClient(mr.createJobConf()); |
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| 300 | |
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| 301 | // check if the jobtracker info file exists |
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| 302 | Path infoFile = jobtracker.recoveryManager.getRestartCountFile(); |
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| 303 | assertTrue("Jobtracker infomation is missing", fs.exists(infoFile)); |
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| 304 | |
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| 305 | // check if garbling the system files disables the recovery process |
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| 306 | LOG.info("Stopping jobtracker for testing with system files deleted"); |
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| 307 | mr.stopJobTracker(); |
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| 308 | |
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| 309 | // delete the info file |
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| 310 | Path rFile = jobtracker.recoveryManager.getRestartCountFile(); |
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| 311 | fs.delete(rFile,false); |
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| 312 | |
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| 313 | // start the jobtracker |
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| 314 | LOG.info("Starting jobtracker with system files deleted"); |
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| 315 | mr.startJobTracker(); |
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| 316 | |
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| 317 | UtilsForTests.waitForJobTracker(jc); |
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| 318 | jobtracker = mr.getJobTrackerRunner().getJobTracker(); |
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| 319 | |
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| 320 | // check if the recovey is disabled |
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| 321 | assertFalse("Recovery is not disabled upon missing system files", |
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| 322 | jobtracker.recoveryManager.shouldRecover()); |
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| 323 | |
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| 324 | // check if the system dir is sane |
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| 325 | assertTrue("Recovery file is missing upon restart", fs.exists(rFile)); |
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| 326 | Path tFile = jobtracker.recoveryManager.getTempRestartCountFile(); |
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| 327 | assertFalse("Temp recovery file exists upon restart", fs.exists(tFile)); |
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| 328 | |
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| 329 | // submit a job |
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| 330 | JobConf job = mr.createJobConf(); |
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| 331 | |
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| 332 | UtilsForTests.configureWaitingJobConf(job, |
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| 333 | new Path(TEST_DIR, "input"), new Path(TEST_DIR, "output6"), 2, 0, |
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| 334 | "test-recovery-manager", signalFile, signalFile); |
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| 335 | |
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| 336 | // submit the faulty job |
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| 337 | RunningJob rJob = jc.submitJob(job); |
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| 338 | LOG.info("Submitted first job " + rJob.getID()); |
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| 339 | |
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| 340 | // kill the jobtracker multiple times and check if the count is correct |
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| 341 | for (int i = 1; i <= 5; ++i) { |
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| 342 | LOG.info("Stopping jobtracker for " + i + " time"); |
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| 343 | mr.stopJobTracker(); |
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| 344 | |
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| 345 | // start the jobtracker |
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| 346 | LOG.info("Starting jobtracker for " + i + " time"); |
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| 347 | mr.startJobTracker(); |
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| 348 | |
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| 349 | UtilsForTests.waitForJobTracker(jc); |
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| 350 | |
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| 351 | // check if the system dir is sane |
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| 352 | assertTrue("Recovery file is missing upon restart", fs.exists(rFile)); |
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| 353 | assertFalse("Temp recovery file exists upon restart", fs.exists(tFile)); |
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| 354 | |
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| 355 | jobtracker = mr.getJobTrackerRunner().getJobTracker(); |
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| 356 | JobInProgress jip = jobtracker.getJob(rJob.getID()); |
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| 357 | |
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| 358 | // assert if restart count is correct |
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| 359 | assertEquals("Recovery manager failed to recover restart count", |
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| 360 | i, jip.getNumRestarts()); |
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| 361 | } |
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| 362 | |
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| 363 | // kill the old job |
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| 364 | rJob.killJob(); |
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| 365 | |
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| 366 | // II. Submit a new job and check if the restart count is 0 |
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| 367 | JobConf job1 = mr.createJobConf(); |
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| 368 | |
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| 369 | UtilsForTests.configureWaitingJobConf(job1, |
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| 370 | new Path(TEST_DIR, "input"), new Path(TEST_DIR, "output7"), 50, 0, |
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| 371 | "test-recovery-manager", signalFile, signalFile); |
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| 372 | |
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| 373 | // make sure that the job id's dont clash |
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| 374 | jobtracker.getNewJobId(); |
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| 375 | |
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| 376 | // submit a new job |
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| 377 | rJob = jc.submitJob(job1); |
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| 378 | LOG.info("Submitted first job after restart" + rJob.getID()); |
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| 379 | |
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| 380 | // assert if restart count is correct |
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| 381 | JobInProgress jip = jobtracker.getJob(rJob.getID()); |
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| 382 | assertEquals("Restart count for new job is incorrect", |
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| 383 | 0, jip.getNumRestarts()); |
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| 384 | |
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| 385 | LOG.info("Stopping jobtracker for testing the fs errors"); |
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| 386 | mr.stopJobTracker(); |
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| 387 | |
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| 388 | // check if system.dir problems in recovery kills the jobtracker |
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| 389 | fs.delete(rFile, false); |
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| 390 | FSDataOutputStream out = fs.create(rFile); |
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| 391 | out.writeBoolean(true); |
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| 392 | out.close(); |
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| 393 | |
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| 394 | // start the jobtracker |
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| 395 | LOG.info("Starting jobtracker with fs errors"); |
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| 396 | mr.startJobTracker(); |
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| 397 | JobTrackerRunner runner = mr.getJobTrackerRunner(); |
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| 398 | assertFalse("JobTracker is still alive", runner.isActive()); |
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| 399 | |
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| 400 | mr.shutdown(); |
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| 401 | } |
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| 402 | |
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| 403 | /** |
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| 404 | * Test if the jobtracker waits for the info file to be created before |
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| 405 | * starting. |
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| 406 | */ |
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| 407 | public void testJobTrackerInfoCreation() throws Exception { |
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| 408 | LOG.info("Testing jobtracker.info file"); |
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| 409 | MiniDFSCluster dfs = new MiniDFSCluster(new Configuration(), 1, true, null); |
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| 410 | String namenode = (dfs.getFileSystem()).getUri().getHost() + ":" |
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| 411 | + (dfs.getFileSystem()).getUri().getPort(); |
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| 412 | // shut down the data nodes |
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| 413 | dfs.shutdownDataNodes(); |
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| 414 | |
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| 415 | // start the jobtracker |
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| 416 | JobConf conf = new JobConf(); |
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| 417 | FileSystem.setDefaultUri(conf, namenode); |
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| 418 | conf.set("mapred.job.tracker", "localhost:0"); |
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| 419 | conf.set("mapred.job.tracker.http.address", "127.0.0.1:0"); |
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| 420 | |
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| 421 | JobTracker jobtracker = new JobTracker(conf); |
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| 422 | |
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| 423 | // now check if the update restart count works fine or not |
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| 424 | boolean failed = false; |
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| 425 | try { |
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| 426 | jobtracker.recoveryManager.updateRestartCount(); |
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| 427 | } catch (IOException ioe) { |
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| 428 | failed = true; |
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| 429 | } |
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| 430 | assertTrue("JobTracker created info files without datanodes!!!", failed); |
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| 431 | |
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| 432 | Path restartFile = jobtracker.recoveryManager.getRestartCountFile(); |
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| 433 | Path tmpRestartFile = jobtracker.recoveryManager.getTempRestartCountFile(); |
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| 434 | FileSystem fs = dfs.getFileSystem(); |
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| 435 | assertFalse("Info file exists after update failure", |
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| 436 | fs.exists(restartFile)); |
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| 437 | assertFalse("Temporary restart-file exists after update failure", |
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| 438 | fs.exists(restartFile)); |
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| 439 | |
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| 440 | // start 1 data node |
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| 441 | dfs.startDataNodes(conf, 1, true, null, null, null, null); |
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| 442 | dfs.waitActive(); |
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| 443 | |
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| 444 | failed = false; |
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| 445 | try { |
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| 446 | jobtracker.recoveryManager.updateRestartCount(); |
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| 447 | } catch (IOException ioe) { |
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| 448 | failed = true; |
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| 449 | } |
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| 450 | assertFalse("JobTracker failed to create info files with datanodes!!!", failed); |
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| 451 | } |
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| 452 | } |
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