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.mapred; |
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19 | |
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20 | import junit.framework.TestCase; |
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21 | |
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22 | import org.apache.commons.logging.Log; |
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23 | import org.apache.commons.logging.LogFactory; |
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24 | import org.apache.hadoop.conf.Configuration; |
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25 | import org.apache.hadoop.fs.permission.FsPermission; |
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26 | import org.apache.hadoop.hdfs.MiniDFSCluster; |
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27 | import org.apache.hadoop.fs.FileSystem; |
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28 | import org.apache.hadoop.fs.Path; |
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29 | import org.apache.hadoop.security.*; |
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30 | |
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31 | /** |
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32 | * Test if JobTracker is resilient to garbage in mapred.system.dir. |
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33 | */ |
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34 | public class TestMapredSystemDir extends TestCase { |
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35 | private static final Log LOG = LogFactory.getLog(TestMapredSystemDir.class); |
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36 | |
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37 | // dfs ugi |
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38 | private static final UnixUserGroupInformation DFS_UGI = |
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39 | TestMiniMRWithDFSWithDistinctUsers.createUGI("dfs", true); |
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40 | // mapred ugi |
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41 | private static final UnixUserGroupInformation MR_UGI = |
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42 | TestMiniMRWithDFSWithDistinctUsers.createUGI("mr", false); |
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43 | private static final FsPermission SYSTEM_DIR_PERMISSION = |
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44 | FsPermission.createImmutable((short) 0733); // rwx-wx-wx |
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45 | |
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46 | public void testGarbledMapredSystemDir() throws Exception { |
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47 | MiniDFSCluster dfs = null; |
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48 | MiniMRCluster mr = null; |
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49 | try { |
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50 | // start dfs |
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51 | Configuration conf = new Configuration(); |
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52 | conf.set("dfs.permissions.supergroup", "supergroup"); |
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53 | UnixUserGroupInformation.saveToConf(conf, |
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54 | UnixUserGroupInformation.UGI_PROPERTY_NAME, DFS_UGI); |
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55 | dfs = new MiniDFSCluster(conf, 1, true, null); |
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56 | FileSystem fs = dfs.getFileSystem(); |
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57 | |
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58 | // create mapred.system.dir |
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59 | Path mapredSysDir = new Path("/mapred"); |
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60 | fs.mkdirs(mapredSysDir); |
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61 | fs.setPermission(mapredSysDir, new FsPermission(SYSTEM_DIR_PERMISSION)); |
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62 | fs.setOwner(mapredSysDir, "mr", "mrgroup"); |
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63 | |
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64 | // start mr (i.e jobtracker) |
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65 | Configuration mrConf = new Configuration(); |
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66 | UnixUserGroupInformation.saveToConf(mrConf, |
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67 | UnixUserGroupInformation.UGI_PROPERTY_NAME, MR_UGI); |
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68 | mr = new MiniMRCluster(0, 0, 0, dfs.getFileSystem().getUri().toString(), |
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69 | 1, null, null, MR_UGI, new JobConf(mrConf)); |
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70 | JobTracker jobtracker = mr.getJobTrackerRunner().getJobTracker(); |
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71 | |
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72 | // add garbage to mapred.system.dir |
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73 | Path garbage = new Path(jobtracker.getSystemDir(), "garbage"); |
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74 | fs.mkdirs(garbage); |
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75 | fs.setPermission(garbage, new FsPermission(SYSTEM_DIR_PERMISSION)); |
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76 | fs.setOwner(garbage, "test", "test-group"); |
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77 | |
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78 | // stop the jobtracker |
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79 | mr.stopJobTracker(); |
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80 | mr.getJobTrackerConf().setBoolean("mapred.jobtracker.restart.recover", |
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81 | false); |
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82 | // start jobtracker but dont wait for it to be up |
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83 | mr.startJobTracker(false); |
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84 | |
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85 | // check 5 times .. each time wait for 2 secs to check if the jobtracker |
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86 | // has crashed or not. |
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87 | for (int i = 0; i < 5; ++i) { |
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88 | LOG.info("Check #" + i); |
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89 | if (!mr.getJobTrackerRunner().isActive()) { |
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90 | return; |
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91 | } |
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92 | UtilsForTests.waitFor(2000); |
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93 | } |
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94 | |
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95 | assertFalse("JobTracker did not bail out (waited for 10 secs)", |
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96 | mr.getJobTrackerRunner().isActive()); |
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97 | } finally { |
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98 | if (dfs != null) { dfs.shutdown(); } |
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99 | if (mr != null) { mr.shutdown();} |
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100 | } |
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101 | } |
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102 | } |
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