| /** |
| * 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.net.URI; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.mapreduce.Cluster; |
| import org.apache.hadoop.mapreduce.ClusterMetrics; |
| import org.apache.hadoop.mapreduce.Job; |
| import org.apache.hadoop.mapreduce.JobContext; |
| import org.apache.hadoop.mapreduce.MapReduceTestUtil; |
| import org.junit.After; |
| import org.junit.Assert; |
| import org.junit.Before; |
| import org.junit.Test; |
| |
| /** |
| * Regression test for MAPREDUCE-913 |
| */ |
| public class TestTaskTrackerSlotManagement { |
| |
| private static final Path TEST_DIR = new Path(System.getProperty( |
| "test.build.data", "/tmp"), "tt_slots"); |
| private static final String CACHE_FILE_PATH = new Path(TEST_DIR, "test.txt") |
| .toString(); |
| |
| /** |
| * Test-setup. Create the cache-file. |
| * |
| * @throws Exception |
| */ |
| @Before |
| public void setUp() throws Exception { |
| new File(TEST_DIR.toString()).mkdirs(); |
| File myFile = new File(CACHE_FILE_PATH); |
| myFile.createNewFile(); |
| } |
| |
| /** |
| * Test-cleanup. Remove the cache-file. |
| * |
| * @throws Exception |
| */ |
| @After |
| public void tearDown() throws Exception { |
| File myFile = new File(CACHE_FILE_PATH); |
| myFile.delete(); |
| new File(TEST_DIR.toString()).delete(); |
| } |
| |
| /** |
| * Test case to test addition of free slot when the job fails localization due |
| * to cache file being modified after the job has started running. |
| * |
| * @throws Exception |
| */ |
| @Test |
| public void testFreeingOfTaskSlots() throws Exception { |
| // Start a cluster with no task tracker. |
| MiniMRCluster mrCluster = new MiniMRCluster(0, "file:///", 1); |
| Configuration conf = mrCluster.createJobConf(); |
| Cluster cluster = new Cluster(conf); |
| // set the debug script so that TT tries to launch the debug |
| // script for failed tasks. |
| conf.set(JobContext.MAP_DEBUG_SCRIPT, "/bin/echo"); |
| conf.set(JobContext.REDUCE_DEBUG_SCRIPT, "/bin/echo"); |
| Job j = MapReduceTestUtil.createJob(conf, new Path(TEST_DIR, "in"), |
| new Path(TEST_DIR, "out"), 0, 0); |
| // Add the local filed created to the cache files of the job |
| j.addCacheFile(new URI(CACHE_FILE_PATH)); |
| j.setMaxMapAttempts(1); |
| j.setMaxReduceAttempts(1); |
| // Submit the job and return immediately. |
| // Job submit now takes care setting the last |
| // modified time of the cache file. |
| j.submit(); |
| // Look up the file and modify the modification time. |
| File myFile = new File(CACHE_FILE_PATH); |
| myFile.setLastModified(0L); |
| // Start up the task tracker after the time has been changed. |
| mrCluster.startTaskTracker(null, null, 0, 1); |
| // Now wait for the job to fail. |
| j.waitForCompletion(false); |
| Assert.assertFalse("Job successfully completed.", j.isSuccessful()); |
| |
| ClusterMetrics metrics = cluster.getClusterStatus(); |
| // validate number of slots in JobTracker |
| Assert.assertEquals(0, metrics.getOccupiedMapSlots()); |
| Assert.assertEquals(0, metrics.getOccupiedReduceSlots()); |
| |
| // validate number of slots in TaskTracker |
| TaskTracker tt = mrCluster.getTaskTrackerRunner(0).getTaskTracker(); |
| Assert.assertEquals(metrics.getMapSlotCapacity(), tt.getFreeSlots(true)); |
| Assert.assertEquals(metrics.getReduceSlotCapacity(), tt.getFreeSlots(false)); |
| |
| } |
| } |