src/test/mapred/org/apache/hadoop/mapred/TestJobRetire.java

/**
 * 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.File;
import java.io.IOException;

import junit.framework.TestCase;

import org.apache.hadoop.fs.Path;
import org.apache.hadoop.mapreduce.server.jobtracker.JTConfig;

/**
 * Test if the job retire works fine. 
 */
public class TestJobRetire extends TestCase {
  static final Path testDir = 
    new Path(System.getProperty("test.build.data","/tmp"), 
             "job-expiry-testing");

  public void testJobRetire() throws Exception {
    MiniMRCluster mr = null;
    try {
      JobConf conf = new JobConf();

      conf.setBoolean(JTConfig.JT_RETIREJOBS, true);
      conf.setLong(JTConfig.JT_RETIREJOB_CACHE_SIZE, 1);
      mr = new MiniMRCluster(0, 0, 1, "file:///", 1, null, null, null, conf, 0);
      JobConf jobConf = mr.createJobConf();
      JobTracker jobtracker = mr.getJobTrackerRunner().getJobTracker();
      
      Path inDir = new Path(testDir, "input1");
      Path outDir = new Path(testDir, "output1");

      JobID id1 = validateJobRetire(jobConf, inDir, outDir, jobtracker);

      outDir = new Path(testDir, "output2");
      JobID id2 = validateJobRetire(jobConf, inDir, outDir, jobtracker);

      assertNull("Job not removed from cache", jobtracker.getJobStatus(id1));

      assertEquals("Total job in cache not correct", 
          1, jobtracker.getAllJobs().length);
    } finally {
      if (mr != null) { mr.shutdown();}
    }
  }

  private JobID validateJobRetire(JobConf jobConf, Path inDir, Path outDir, 
      JobTracker jobtracker) throws IOException {

    RunningJob rj = UtilsForTests.runJob(jobConf, inDir, outDir, 0, 0);
    rj.waitForCompletion();
    assertTrue(rj.isSuccessful());
    JobID id = rj.getID();

    JobInProgress job = jobtracker.getJob(id);
    //wait for job to get retired
    for (int i = 0; i < 10 && job != null; i++) {
      UtilsForTests.waitFor(1000);
      job = jobtracker.getJob(id);
    }
    assertNull("Job did not retire", job);
    assertTrue("History url not set", rj.getHistoryUrl() != null && 
    rj.getHistoryUrl().length() > 0);
    assertNotNull("Job is not in cache", jobtracker.getJobStatus(id));
    
    // get the job conf filename
    String name = jobtracker.getLocalJobFilePath(id);
    File file = new File(name);
 
    assertFalse("JobConf file not deleted", file.exists());
    return id;
  }

}