TestKillCompletedJob.java
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- /**
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements. See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership. The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License. You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
- package org.apache.hadoop.mapred;
- import java.io.*;
- import java.net.*;
- import junit.framework.TestCase;
- import org.apache.hadoop.conf.Configuration;
- import org.apache.hadoop.hdfs.MiniDFSCluster;
- import org.apache.hadoop.fs.FileSystem;
- import org.apache.hadoop.fs.Path;
- import org.apache.hadoop.io.IntWritable;
- import org.apache.hadoop.io.Text;
- /**
- * A JUnit test to test that killing completed jobs does not move them
- * to the failed sate - See JIRA HADOOP-2132
- */
- public class TestKillCompletedJob extends TestCase {
-
-
- static Boolean launchWordCount(String fileSys,
- String jobTracker,
- JobConf conf,
- String input,
- int numMaps,
- int numReduces) throws IOException {
- final Path inDir = new Path("/testing/wc/input");
- final Path outDir = new Path("/testing/wc/output");
- FileSystem fs = FileSystem.get(URI.create(fileSys), conf);
- fs.delete(outDir, true);
- if (!fs.mkdirs(inDir)) {
- throw new IOException("Mkdirs failed to create " + inDir.toString());
- }
- {
- DataOutputStream file = fs.create(new Path(inDir, "part-0"));
- file.writeBytes(input);
- file.close();
- }
- FileSystem.setDefaultUri(conf, fileSys);
- conf.set("mapred.job.tracker", jobTracker);
- conf.setJobName("wordcount");
- conf.setInputFormat(TextInputFormat.class);
-
- // the keys are words (strings)
- conf.setOutputKeyClass(Text.class);
- // the values are counts (ints)
- conf.setOutputValueClass(IntWritable.class);
-
- conf.setMapperClass(WordCount.MapClass.class);
- conf.setCombinerClass(WordCount.Reduce.class);
- conf.setReducerClass(WordCount.Reduce.class);
-
- FileInputFormat.setInputPaths(conf, inDir);
- FileOutputFormat.setOutputPath(conf, outDir);
- conf.setNumMapTasks(numMaps);
- conf.setNumReduceTasks(numReduces);
- RunningJob rj = JobClient.runJob(conf);
- JobID jobId = rj.getID();
-
- // Kill the job after it is successful
- if (rj.isSuccessful())
- {
- System.out.println("Job Id:" + jobId +
- " completed successfully. Killing it now");
- rj.killJob();
- }
-
-
- return rj.isSuccessful();
-
- }
-
- public void testKillCompJob() throws IOException {
- String namenode = null;
- MiniDFSCluster dfs = null;
- MiniMRCluster mr = null;
- FileSystem fileSys = null;
- try {
- final int taskTrackers = 1;
- Configuration conf = new Configuration();
- dfs = new MiniDFSCluster(conf, 1, true, null);
- fileSys = dfs.getFileSystem();
- namenode = fileSys.getUri().toString();
- mr = new MiniMRCluster(taskTrackers, namenode, 3);
- JobConf jobConf = new JobConf();
-
- Boolean result;
- final String jobTrackerName = "localhost:" + mr.getJobTrackerPort();
- result = launchWordCount(namenode, jobTrackerName, jobConf,
- "Small textn",
- 1, 0);
- assertTrue(result);
-
- } finally {
- if (dfs != null) { dfs.shutdown(); }
- if (mr != null) { mr.shutdown();
- }
- }
- }
-
- }