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 java.io.IOException; |
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21 | |
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22 | import org.apache.hadoop.conf.Configuration; |
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23 | import org.apache.hadoop.examples.SleepJob.SleepInputFormat; |
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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.MiniDFSCluster; |
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27 | import org.apache.hadoop.io.IntWritable; |
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28 | import org.apache.hadoop.io.NullWritable; |
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29 | import org.apache.hadoop.mapred.lib.NullOutputFormat; |
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30 | |
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31 | import junit.framework.TestCase; |
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32 | |
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33 | public class TestTrackerBlacklistAcrossJobs extends TestCase { |
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34 | private static final String hosts[] = new String[] { |
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35 | "host1.rack.com", "host2.rack.com", "host3.rack.com" |
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36 | }; |
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37 | final Path inDir = new Path("/testing"); |
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38 | final Path outDir = new Path("/output"); |
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39 | |
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40 | public static class SleepJobFailOnHost extends MapReduceBase |
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41 | implements Mapper<IntWritable, IntWritable, IntWritable, NullWritable> { |
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42 | String hostname = ""; |
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43 | |
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44 | public void configure(JobConf job) { |
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45 | this.hostname = job.get("slave.host.name"); |
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46 | } |
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47 | |
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48 | public void map(IntWritable key, IntWritable value, |
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49 | OutputCollector<IntWritable, NullWritable> output, |
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50 | Reporter reporter) |
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51 | throws IOException { |
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52 | if (this.hostname.equals(hosts[0])) { |
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53 | // fail here |
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54 | throw new IOException("failing on host: " + hosts[0]); |
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55 | } |
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56 | } |
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57 | } |
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58 | |
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59 | public void testBlacklistAcrossJobs() throws IOException { |
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60 | MiniDFSCluster dfs = null; |
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61 | MiniMRCluster mr = null; |
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62 | FileSystem fileSys = null; |
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63 | Configuration conf = new Configuration(); |
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64 | // setup dfs and input |
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65 | dfs = new MiniDFSCluster(conf, 1, true, null, hosts); |
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66 | fileSys = dfs.getFileSystem(); |
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67 | if (!fileSys.mkdirs(inDir)) { |
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68 | throw new IOException("Mkdirs failed to create " + inDir.toString()); |
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69 | } |
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70 | UtilsForTests.writeFile(dfs.getNameNode(), conf, |
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71 | new Path(inDir + "/file"), (short) 1); |
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72 | // start mr cluster |
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73 | JobConf jtConf = new JobConf(); |
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74 | jtConf.setInt("mapred.max.tracker.blacklists", 1); |
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75 | mr = new MiniMRCluster(3, fileSys.getUri().toString(), |
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76 | 1, null, hosts, jtConf); |
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77 | |
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78 | // setup job configuration |
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79 | JobConf mrConf = mr.createJobConf(); |
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80 | JobConf job = new JobConf(mrConf); |
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81 | job.setInt("mapred.max.tracker.failures", 1); |
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82 | job.setNumMapTasks(30); |
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83 | job.setNumReduceTasks(0); |
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84 | job.setMapperClass(SleepJobFailOnHost.class); |
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85 | job.setMapOutputKeyClass(IntWritable.class); |
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86 | job.setMapOutputValueClass(NullWritable.class); |
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87 | job.setOutputFormat(NullOutputFormat.class); |
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88 | job.setInputFormat(SleepInputFormat.class); |
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89 | FileInputFormat.setInputPaths(job, inDir); |
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90 | FileOutputFormat.setOutputPath(job, outDir); |
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91 | |
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92 | // run the job |
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93 | JobClient jc = new JobClient(mrConf); |
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94 | RunningJob running = JobClient.runJob(job); |
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95 | assertEquals("Job failed", JobStatus.SUCCEEDED, running.getJobState()); |
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96 | assertEquals("Didn't blacklist the host", 1, |
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97 | jc.getClusterStatus().getBlacklistedTrackers()); |
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98 | assertEquals("Fault count should be 1", 1, mr.getFaultCount(hosts[0])); |
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99 | |
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100 | // run the same job once again |
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101 | // there should be no change in blacklist count |
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102 | running = JobClient.runJob(job); |
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103 | assertEquals("Job failed", JobStatus.SUCCEEDED, running.getJobState()); |
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104 | assertEquals("Didn't blacklist the host", 1, |
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105 | jc.getClusterStatus().getBlacklistedTrackers()); |
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106 | assertEquals("Fault count should be 1", 1, mr.getFaultCount(hosts[0])); |
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107 | } |
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108 | } |
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