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MAPREDUCE-6740. Enforce mapreduce.task.timeout to be at least mapreduce.task.progress-report.interval. (Haibo Chen via kasha)

This commit is contained in:
Karthik Kambatla 2016-10-05 23:12:45 -07:00
parent a2cdd2215e
commit c955a59d63
5 changed files with 113 additions and 11 deletions
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24
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/main/java/org/apache/hadoop/mapreduce/v2/app/TaskHeartbeatHandler.java
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@ -23,10 +23,12 @@ import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import com.google.common.annotations.VisibleForTesting;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.mapreduce.MRJobConfig;
import org.apache.hadoop.mapreduce.util.MRJobConfUtil;
import org.apache.hadoop.mapreduce.v2.api.records.TaskAttemptId;
import org.apache.hadoop.mapreduce.v2.app.job.event.TaskAttemptDiagnosticsUpdateEvent;
import org.apache.hadoop.mapreduce.v2.app.job.event.TaskAttemptEvent;
@ -67,7 +69,7 @@ public class TaskHeartbeatHandler extends AbstractService {
//received from a task.
private Thread lostTaskCheckerThread;
private volatile boolean stopped;
private int taskTimeOut = 5 * 60 * 1000;// 5 mins
private long taskTimeOut;
private int taskTimeOutCheckInterval = 30 * 1000; // 30 seconds.
private final EventHandler eventHandler;
@ -87,7 +89,19 @@ public class TaskHeartbeatHandler extends AbstractService {
@Override
protected void serviceInit(Configuration conf) throws Exception {
super.serviceInit(conf);
taskTimeOut = conf.getInt(MRJobConfig.TASK_TIMEOUT, 5 * 60 * 1000);
taskTimeOut = conf.getLong(
MRJobConfig.TASK_TIMEOUT, MRJobConfig.DEFAULT_TASK_TIMEOUT_MILLIS);
// enforce task timeout is at least twice as long as task report interval
long taskProgressReportIntervalMillis = MRJobConfUtil.
getTaskProgressReportInterval(conf);
long minimumTaskTimeoutAllowed = taskProgressReportIntervalMillis * 2;
if(taskTimeOut < minimumTaskTimeoutAllowed) {
taskTimeOut = minimumTaskTimeoutAllowed;
LOG.info("Task timeout must be as least twice as long as the task " +
"status report interval. Setting task timeout to " + taskTimeOut);
}
taskTimeOutCheckInterval =
conf.getInt(MRJobConfig.TASK_TIMEOUT_CHECK_INTERVAL_MS, 30 * 1000);
}
@ -140,7 +154,7 @@ public class TaskHeartbeatHandler extends AbstractService {
while (iterator.hasNext()) {
Map.Entry<TaskAttemptId, ReportTime> entry = iterator.next();
boolean taskTimedOut = (taskTimeOut > 0) &&
boolean taskTimedOut = (taskTimeOut > 0) &&
(currentTime > (entry.getValue().getLastProgress() + taskTimeOut));
if(taskTimedOut) {
@ -163,4 +177,8 @@ public class TaskHeartbeatHandler extends AbstractService {
}
}
@VisibleForTesting
public long getTaskTimeOut() {
return taskTimeOut;
}
}

67
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/test/java/org/apache/hadoop/mapreduce/v2/app/TestTaskHeartbeatHandler.java
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@ -35,6 +35,7 @@ import org.apache.hadoop.yarn.event.Event;
import org.apache.hadoop.yarn.event.EventHandler;
import org.apache.hadoop.yarn.util.Clock;
import org.apache.hadoop.yarn.util.SystemClock;
import org.junit.Assert;
import org.junit.Test;
@ -50,6 +51,9 @@ public class TestTaskHeartbeatHandler {
Configuration conf = new Configuration();
conf.setInt(MRJobConfig.TASK_TIMEOUT, 10); //10 ms
// set TASK_PROGRESS_REPORT_INTERVAL to a value smaller than TASK_TIMEOUT
// so that TASK_TIMEOUT is not overridden
conf.setLong(MRJobConfig.TASK_PROGRESS_REPORT_INTERVAL, 5);
conf.setInt(MRJobConfig.TASK_TIMEOUT_CHECK_INTERVAL_MS, 10); //10 ms
hb.init(conf);
@ -68,4 +72,67 @@ public class TestTaskHeartbeatHandler {
}
}
/**
* Test if the final heartbeat timeout is set correctly when task progress
* report interval is set bigger than the task timeout in the configuration.
*/
@Test
public void testTaskTimeoutConfigSmallerThanTaskProgressReportInterval() {
testTaskTimeoutWrtProgressReportInterval(1000L, 5000L);
}
/**
* Test if the final heartbeat timeout is set correctly when task progress
* report interval is set smaller than the task timeout in the configuration.
*/
@Test
public void testTaskTimeoutConfigBiggerThanTaskProgressReportInterval() {
testTaskTimeoutWrtProgressReportInterval(5000L, 1000L);
}
/**
* Test if the final heartbeat timeout is set correctly when task progress
* report interval is not set in the configuration.
*/
@Test
public void testTaskTimeoutConfigWithoutTaskProgressReportInterval() {
final long taskTimeoutConfiged = 2000L;
final Configuration conf = new Configuration();
conf.setLong(MRJobConfig.TASK_TIMEOUT, taskTimeoutConfiged);
final long expectedTimeout = taskTimeoutConfiged;
verifyTaskTimeoutConfig(conf, expectedTimeout);
}
/**
* Test if task timeout is set properly in response to the configuration of
* the task progress report interval.
*/
private static void testTaskTimeoutWrtProgressReportInterval(
long timeoutConfig, long taskreportInterval) {
final Configuration conf = new Configuration();
conf.setLong(MRJobConfig.TASK_TIMEOUT, timeoutConfig);
conf.setLong(MRJobConfig.TASK_PROGRESS_REPORT_INTERVAL, taskreportInterval);
// expected task timeout is at least twice as long as task report interval
final long expectedTimeout = Math.max(timeoutConfig, taskreportInterval*2);
verifyTaskTimeoutConfig(conf, expectedTimeout);
}
/**
* Verify task timeout is set as expected in TaskHeartBeatHandler with given
* configuration.
* @param conf the configuration
* @param expectedTimeout expected timeout value
*/
private static void verifyTaskTimeoutConfig(final Configuration conf,
final long expectedTimeout) {
final TaskHeartbeatHandler hb =
new TaskHeartbeatHandler(null, new SystemClock(), 1);
hb.init(conf);
Assert.assertTrue("The value of the task timeout is incorrect.",
hb.getTaskTimeOut() == expectedTimeout);
}
}

8
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapred/Task.java
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@ -62,6 +62,7 @@ import org.apache.hadoop.mapreduce.MRConfig;
import org.apache.hadoop.mapreduce.MRJobConfig;
import org.apache.hadoop.mapreduce.lib.reduce.WrappedReducer;
import org.apache.hadoop.mapreduce.task.ReduceContextImpl;
import org.apache.hadoop.mapreduce.util.MRJobConfUtil;
import org.apache.hadoop.yarn.util.ResourceCalculatorProcessTree;
import org.apache.hadoop.net.NetUtils;
import org.apache.hadoop.util.ExitUtil;
@ -780,9 +781,10 @@ abstract public class Task implements Writable, Configurable {
int remainingRetries = MAX_RETRIES;
// get current flag value and reset it as well
boolean sendProgress = resetProgressFlag();
long taskProgressInterval =
conf.getLong(MRJobConfig.TASK_PROGRESS_REPORT_INTERVAL,
MRJobConfig.DEFAULT_TASK_PROGRESS_REPORT_INTERVAL);
long taskProgressInterval = MRJobConfUtil.
getTaskProgressReportInterval(conf);
while (!taskDone.get()) {
synchronized (lock) {
done = false;

9
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/MRJobConfig.java
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@ -54,11 +54,6 @@ public interface MRJobConfig {
// negative values disable the limit
public static final long DEFAULT_TASK_LOCAL_WRITE_LIMIT_BYTES = -1;
public static final String TASK_PROGRESS_REPORT_INTERVAL =
"mapreduce.task.progress-report.interval";
/** The number of milliseconds between progress reports. */
public static final int DEFAULT_TASK_PROGRESS_REPORT_INTERVAL = 3000;
public static final String JAR = "mapreduce.job.jar";
public static final String ID = "mapreduce.job.id";
@ -255,6 +250,10 @@ public interface MRJobConfig {
public static final String TASK_REDUCE_PROFILE_PARAMS = "mapreduce.task.profile.reduce.params";
public static final String TASK_TIMEOUT = "mapreduce.task.timeout";
long DEFAULT_TASK_TIMEOUT_MILLIS = 5 * 60 * 1000L;
String TASK_PROGRESS_REPORT_INTERVAL =
"mapreduce.task.progress-report.interval";
public static final String TASK_TIMEOUT_CHECK_INTERVAL_MS = "mapreduce.task.timeout.check-interval-ms";

16
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/util/MRJobConfUtil.java
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@ -42,4 +42,20 @@ public final class MRJobConfUtil {
*/
private MRJobConfUtil() {
}
/**
* Get the progress heartbeat interval configuration for mapreduce tasks.
* By default, the value of progress heartbeat interval is a proportion of
* that of task timeout.
* @param conf the job configuration to read from
* @return the value of task progress report interval
*/
public static long getTaskProgressReportInterval(final Configuration conf) {
long taskHeartbeatTimeOut = conf.getLong(
MRJobConfig.TASK_TIMEOUT, MRJobConfig.DEFAULT_TASK_TIMEOUT_MILLIS);
return conf.getLong(MRJobConfig.TASK_PROGRESS_REPORT_INTERVAL,
(long) (TASK_REPORT_INTERVAL_TO_TIMEOUT_RATIO * taskHeartbeatTimeOut));
}
public static final float TASK_REPORT_INTERVAL_TO_TIMEOUT_RATIO = 0.01f;
}