| /** |
| * 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 junit.framework.TestCase; |
| import java.io.IOException; |
| |
| import org.apache.hadoop.mapreduce.server.jobtracker.JTConfig; |
| |
| /** |
| * A JUnit test to test configured task limits. |
| */ |
| public class TestTaskLimits extends TestCase { |
| |
| static void runTest(int maxTasks, int numMaps, int numReds, |
| boolean shouldFail) throws Exception { |
| JobConf conf = new JobConf(); |
| conf.setInt(JTConfig.JT_TASKS_PER_JOB, maxTasks); |
| conf.set(JTConfig.JT_IPC_HANDLER_COUNT, "1"); |
| MiniMRCluster mr = new MiniMRCluster(0, "file:///", 1, null, null, conf); |
| JobTracker jt = mr.getJobTrackerRunner().getJobTracker(); |
| JobConf jc = mr.createJobConf(); |
| jc.setNumMapTasks(numMaps); |
| jc.setNumReduceTasks(numReds); |
| JobInProgress jip = new JobInProgress(new JobID(), jc, jt); |
| boolean failed = false; |
| try { |
| jip.checkTaskLimits(); |
| } catch (IOException e) { |
| failed = true; |
| } |
| assertEquals(shouldFail, failed); |
| mr.shutdown(); |
| } |
| |
| public void testBeyondLimits() throws Exception { |
| // Max tasks is 4, Requested is 8, shouldFail = true |
| runTest(4, 8, 0, true); |
| } |
| |
| public void testTaskWithinLimits() throws Exception { |
| // Max tasks is 4, requested is 4, shouldFail = false |
| runTest(4, 4, 0, false); |
| } |
| |
| |
| public void testTaskWithoutLimits() throws Exception { |
| // No task limit, requested is 16, shouldFail = false |
| runTest(-1, 8, 8, false); |
| } |
| |
| } |