/**
* 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.IOException;
import java.util.List;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.examples.SleepJob;
import org.apache.hadoop.util.LinuxMemoryCalculatorPlugin;
import org.apache.hadoop.util.MemoryCalculatorPlugin;
import org.apache.hadoop.util.ToolRunner;
import org.apache.hadoop.mapreduce.server.jobtracker.TaskTracker;
import junit.framework.TestCase;
/**
* This test class tests the functionality related to configuring, reporting
* and computing memory related parameters in a Map/Reduce cluster.
*
* Each test sets up a {@link MiniMRCluster} with a locally defined
* {@link org.apache.hadoop.mapred.TaskScheduler}. This scheduler validates
* the memory related configuration is correctly computed and reported from
* the tasktracker in
* {@link org.apache.hadoop.mapred.TaskScheduler#assignTasks(TaskTrackerStatus)}.
*/
public class TestTTMemoryReporting extends TestCase {
static final Log LOG = LogFactory.getLog(TestTTMemoryReporting.class);
private MiniMRCluster miniMRCluster;
/**
* Fake scheduler to test the proper reporting of memory values by TT
*/
public static class FakeTaskScheduler extends JobQueueTaskScheduler {
private boolean hasPassed = true;
private String message;
public FakeTaskScheduler() {
super();
}
public boolean hasTestPassed() {
return hasPassed;
}
public String getFailureMessage() {
return message;
}
@Override
public List<Task> assignTasks(TaskTracker taskTracker)
throws IOException {
TaskTrackerStatus status = taskTracker.getStatus();
long totalVirtualMemoryOnTT =
getConf().getLong("totalVmemOnTT", JobConf.DISABLED_MEMORY_LIMIT);
long totalPhysicalMemoryOnTT =
getConf().getLong("totalPmemOnTT", JobConf.DISABLED_MEMORY_LIMIT);
long mapSlotMemorySize =
getConf().getLong("mapSlotMemorySize", JobConf.DISABLED_MEMORY_LIMIT);
long reduceSlotMemorySize =
getConf()
.getLong("reduceSlotMemorySize", JobConf.DISABLED_MEMORY_LIMIT);
long reportedTotalVirtualMemoryOnTT =
status.getResourceStatus().getTotalVirtualMemory();
long reportedTotalPhysicalMemoryOnTT =
status.getResourceStatus().getTotalPhysicalMemory();
long reportedMapSlotMemorySize =
status.getResourceStatus().getMapSlotMemorySizeOnTT();
long reportedReduceSlotMemorySize =
status.getResourceStatus().getReduceSlotMemorySizeOnTT();
message =
"expected memory values : (totalVirtualMemoryOnTT, totalPhysicalMemoryOnTT, "
+ "mapSlotMemSize, reduceSlotMemorySize) = ("
+ totalVirtualMemoryOnTT + ", " + totalPhysicalMemoryOnTT + ","
+ mapSlotMemorySize + "," + reduceSlotMemorySize + ")";
message +=
"\nreported memory values : (totalVirtualMemoryOnTT, totalPhysicalMemoryOnTT, "
+ "reportedMapSlotMemorySize, reportedReduceSlotMemorySize) = ("
+ reportedTotalVirtualMemoryOnTT
+ ", "
+ reportedTotalPhysicalMemoryOnTT
+ ","
+ reportedMapSlotMemorySize
+ ","
+ reportedReduceSlotMemorySize
+ ")";
LOG.info(message);
if (totalVirtualMemoryOnTT != reportedTotalVirtualMemoryOnTT
|| totalPhysicalMemoryOnTT != reportedTotalPhysicalMemoryOnTT
|| mapSlotMemorySize != reportedMapSlotMemorySize
|| reduceSlotMemorySize != reportedReduceSlotMemorySize) {
hasPassed = false;
}
return super.assignTasks(taskTracker);
}
}
/**
* Test that verifies default values are configured and reported correctly.
*
* @throws Exception
*/
public void testDefaultMemoryValues()
throws Exception {
JobConf conf = new JobConf();
try {
// Memory values are disabled by default.
conf.setClass(
org.apache.hadoop.mapred.TaskTracker.MAPRED_TASKTRACKER_MEMORY_CALCULATOR_PLUGIN_PROPERTY,
DummyMemoryCalculatorPlugin.class, MemoryCalculatorPlugin.class);
setUpCluster(conf);
runSleepJob(miniMRCluster.createJobConf());
verifyTestResults();
} finally {
tearDownCluster();
}
}
/**
* Test that verifies that configured values are reported correctly.
*
* @throws Exception
*/
public void testConfiguredMemoryValues()
throws Exception {
JobConf conf = new JobConf();
conf.setLong("totalVmemOnTT", 4 * 1024 * 1024 * 1024L);
conf.setLong("totalPmemOnTT", 2 * 1024 * 1024 * 1024L);
conf.setLong("mapSlotMemorySize", 1 * 512L);
conf.setLong("reduceSlotMemorySize", 1 * 1024L);
conf.setClass(
org.apache.hadoop.mapred.TaskTracker.MAPRED_TASKTRACKER_MEMORY_CALCULATOR_PLUGIN_PROPERTY,
DummyMemoryCalculatorPlugin.class, MemoryCalculatorPlugin.class);
conf.setLong(DummyMemoryCalculatorPlugin.MAXVMEM_TESTING_PROPERTY,
4 * 1024 * 1024 * 1024L);
conf.setLong(DummyMemoryCalculatorPlugin.MAXPMEM_TESTING_PROPERTY,
2 * 1024 * 1024 * 1024L);
conf.setLong(JobTracker.MAPRED_CLUSTER_MAP_MEMORY_MB_PROPERTY,
512L);
conf.setLong(
JobTracker.MAPRED_CLUSTER_REDUCE_MEMORY_MB_PROPERTY, 1024L);
try {
setUpCluster(conf);
JobConf jobConf = miniMRCluster.createJobConf();
jobConf.setMemoryForMapTask(1 * 1024L);
jobConf.setMemoryForReduceTask(2 * 1024L);
runSleepJob(jobConf);
verifyTestResults();
} finally {
tearDownCluster();
}
}
/**
* Test that verifies that total memory values are calculated and reported
* correctly.
*
* @throws Exception
*/
public void testMemoryValuesOnLinux()
throws Exception {
if (!System.getProperty("os.name").startsWith("Linux")) {
return;
}
JobConf conf = new JobConf();
LinuxMemoryCalculatorPlugin plugin = new LinuxMemoryCalculatorPlugin();
conf.setLong("totalVmemOnTT", plugin.getVirtualMemorySize());
conf.setLong("totalPmemOnTT", plugin.getPhysicalMemorySize());
try {
setUpCluster(conf);
runSleepJob(miniMRCluster.createJobConf());
verifyTestResults();
} finally {
tearDownCluster();
}
}
private void setUpCluster(JobConf conf)
throws Exception {
conf.setClass("mapred.jobtracker.taskScheduler",
TestTTMemoryReporting.FakeTaskScheduler.class, TaskScheduler.class);
conf.set("mapred.job.tracker.handler.count", "1");
miniMRCluster = new MiniMRCluster(1, "file:///", 3, null, null, conf);
}
private void runSleepJob(JobConf conf) throws Exception {
String[] args = { "-m", "1", "-r", "1",
"-mt", "10", "-rt", "10" };
ToolRunner.run(conf, new SleepJob(), args);
}
private void verifyTestResults() {
FakeTaskScheduler scheduler =
(FakeTaskScheduler)miniMRCluster.getJobTrackerRunner().
getJobTracker().getTaskScheduler();
assertTrue(scheduler.getFailureMessage(), scheduler.hasTestPassed());
}
private void tearDownCluster() {
if (miniMRCluster != null) {
miniMRCluster.shutdown();
}
}
}