/**
* 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 static org.junit.Assert.assertEquals;
import java.io.File;
import java.io.IOException;
import org.apache.hadoop.examples.SleepJob;
import org.junit.Test;
public class TestTaskTrackerInstrumentation {
@Test
public void testStartup() throws IOException {
MiniMRCluster mr = null;
try {
JobConf jtConf = new JobConf();
// Set a bad class.
jtConf.set("mapred.tasktracker.instrumentation",
"org.nowhere.FUBAR");
mr = new MiniMRCluster(1, "file:///", 1, null, null, jtConf);
// Assert that the TT fell back to default class.
TaskTracker tt = mr.getTaskTrackerRunner(0).getTaskTracker();
assertEquals(TaskTrackerInstrumentation.create(tt).getClass(),
mr.getTaskTrackerRunner(0).getTaskTracker()
.getTaskTrackerInstrumentation().getClass());
} finally {
mr.shutdown();
}
}
@Test
public void testSlots() throws IOException {
MiniMRCluster mr = null;
try {
JobConf jtConf = new JobConf();
jtConf.set("mapred.tasktracker.instrumentation",
MyTaskTrackerMetricsInst.class.getName());
mr = new MiniMRCluster(1, "file:///", 1, null, null, jtConf);
MyTaskTrackerMetricsInst instr = (MyTaskTrackerMetricsInst)
mr.getTaskTrackerRunner(0).getTaskTracker()
.getTaskTrackerInstrumentation();
JobConf conf = mr.createJobConf();
SleepJob job = new SleepJob();
job.setConf(conf);
int numMapTasks = 3;
int numReduceTasks = 2;
job.run(numMapTasks, numReduceTasks, 1, 1, 1, 1);
synchronized (instr) {
// 5 regular tasks + 2 setup/cleanup tasks.
assertEquals(7, instr.complete);
assertEquals(7, instr.end);
assertEquals(7, instr.launch);
}
} finally {
if (mr != null) {
mr.shutdown();
}
}
}
static class MyTaskTrackerMetricsInst extends TaskTrackerInstrumentation {
public int complete = 0;
public int launch = 0;
public int end = 0;
public MyTaskTrackerMetricsInst(TaskTracker tracker) {
super(tracker);
}
@Override
public void completeTask(TaskAttemptID t) {
this.complete++;
}
@Override
public void reportTaskLaunch(TaskAttemptID t, File stdout, File stderr) {
this.launch++;
}
@Override
public void reportTaskEnd(TaskAttemptID t) {
this.end++;
}
}
}