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MAPREDUCE-5812. Make job context available to OutputCommitter.isRecoverySupported(). Contributed by Mohammad Kamrul Islam 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1590668 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Jason Darrell Lowe 2014-04-28 15:18:02 +00:00
parent 02d0f0ba54
commit bb7ce82816
10 changed files with 359 additions and 9 deletions
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3
hadoop-mapreduce-project/CHANGES.txt
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@ -172,6 +172,9 @@ Release 2.5.0 - UNRELEASED
MAPREDUCE-5639. Port DistCp2 document to trunk (Akira AJISAKA via jeagles)
MAPREDUCE-5812. Make job context available to
OutputCommitter.isRecoverySupported() (Mohammad Kamrul Islam via jlowe)
OPTIMIZATIONS
BUG FIXES

2
hadoop-mapreduce-project/dev-support/findbugs-exclude.xml
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@ -158,6 +158,7 @@
<Or>
<Method name="commitJob" />
<Method name="recoverTask" />
<Method name="isRecoverySupported" />
</Or>
<Bug pattern="NM_WRONG_PACKAGE" />
</Match>
@ -168,6 +169,7 @@
<Method name="commitJob" />
<Method name="cleanupJob" />
<Method name="recoverTask" />
<Method name="isRecoverySupported" />
</Or>
<Bug pattern="NM_WRONG_PACKAGE_INTENTIONAL" />
</Match>

25
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/main/java/org/apache/hadoop/mapreduce/v2/app/MRAppMaster.java
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@ -48,6 +48,7 @@
import org.apache.hadoop.mapred.TaskAttemptListenerImpl;
import org.apache.hadoop.mapred.TaskLog;
import org.apache.hadoop.mapred.TaskUmbilicalProtocol;
import org.apache.hadoop.mapreduce.JobContext;
import org.apache.hadoop.mapreduce.MRJobConfig;
import org.apache.hadoop.mapreduce.OutputCommitter;
import org.apache.hadoop.mapreduce.OutputFormat;
@ -67,6 +68,7 @@
import org.apache.hadoop.mapreduce.jobhistory.JobHistoryParser.TaskInfo;
import org.apache.hadoop.mapreduce.security.TokenCache;
import org.apache.hadoop.mapreduce.security.token.JobTokenSecretManager;
import org.apache.hadoop.mapreduce.task.JobContextImpl;
import org.apache.hadoop.mapreduce.task.TaskAttemptContextImpl;
import org.apache.hadoop.mapreduce.v2.api.records.AMInfo;
import org.apache.hadoop.mapreduce.v2.api.records.JobId;
@ -1107,7 +1109,24 @@ public void stop() {
TaskLog.syncLogsShutdown(logSyncer);
}
private void processRecovery() {
private boolean isRecoverySupported(OutputCommitter committer2)
throws IOException {
boolean isSupported = false;
JobContext _jobContext;
if (committer != null) {
if (newApiCommitter) {
_jobContext = new JobContextImpl(
getConfig(), TypeConverter.fromYarn(getJobId()));
} else {
_jobContext = new org.apache.hadoop.mapred.JobContextImpl(
new JobConf(getConfig()), TypeConverter.fromYarn(getJobId()));
}
isSupported = committer.isRecoverySupported(_jobContext);
}
return isSupported;
}
private void processRecovery() throws IOException{
if (appAttemptID.getAttemptId() == 1) {
return; // no need to recover on the first attempt
}
@ -1115,8 +1134,8 @@ private void processRecovery() {
boolean recoveryEnabled = getConfig().getBoolean(
MRJobConfig.MR_AM_JOB_RECOVERY_ENABLE,
MRJobConfig.MR_AM_JOB_RECOVERY_ENABLE_DEFAULT);
boolean recoverySupportedByCommitter =
committer != null && committer.isRecoverySupported();
boolean recoverySupportedByCommitter = isRecoverySupported(committer);
// If a shuffle secret was not provided by the job client then this app
// attempt will generate one. However that disables recovery if there

8
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/test/java/org/apache/hadoop/mapreduce/v2/app/MRApp.java
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@ -627,10 +627,18 @@ public void abortJob(JobContext jobContext, State state)
throws IOException {
committer.abortJob(jobContext, state);
}
@Override
public boolean isRecoverySupported(JobContext jobContext) throws IOException{
return committer.isRecoverySupported(jobContext);
}
@SuppressWarnings("deprecation")
@Override
public boolean isRecoverySupported() {
return committer.isRecoverySupported();
}
@Override
public void setupTask(TaskAttemptContext taskContext)
throws IOException {

260
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/test/java/org/apache/hadoop/mapreduce/v2/app/TestRecovery.java
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@ -425,6 +425,266 @@ public void testCrashOfMapsOnlyJob() throws Exception {
app.verifyCompleted();
}
/**
* The class provides a custom implementation of output committer setupTask
* and isRecoverySupported methods, which determines if recovery supported
* based on config property.
*/
public static class TestFileOutputCommitter extends
org.apache.hadoop.mapred.FileOutputCommitter {
@Override
public boolean isRecoverySupported(
org.apache.hadoop.mapred.JobContext jobContext) {
boolean isRecoverySupported = false;
if (jobContext != null && jobContext.getConfiguration() != null) {
isRecoverySupported = jobContext.getConfiguration().getBoolean(
"want.am.recovery", false);
}
return isRecoverySupported;
}
}
/**
* This test case primarily verifies if the recovery is controlled through config
* property. In this case, recover is turned ON. AM with 3 maps and 0 reduce.
* AM crashes after the first two tasks finishes and recovers completely and
* succeeds in the second generation.
*
* @throws Exception
*/
@Test
public void testRecoverySuccessUsingCustomOutputCommitter() throws Exception {
int runCount = 0;
MRApp app = new MRAppWithHistory(3, 0, false, this.getClass().getName(),
true, ++runCount);
Configuration conf = new Configuration();
conf.setClass("mapred.output.committer.class",
TestFileOutputCommitter.class,
org.apache.hadoop.mapred.OutputCommitter.class);
conf.set(FileOutputFormat.OUTDIR, outputDir.toString());
conf.setBoolean("want.am.recovery", true);
Job job = app.submit(conf);
app.waitForState(job, JobState.RUNNING);
// all maps would be running
Assert.assertEquals("No of tasks not correct", 3, job.getTasks().size());
Iterator<Task> it = job.getTasks().values().iterator();
Task mapTask1 = it.next();
Task mapTask2 = it.next();
Task mapTask3 = it.next();
// all maps must be running
app.waitForState(mapTask1, TaskState.RUNNING);
app.waitForState(mapTask2, TaskState.RUNNING);
app.waitForState(mapTask3, TaskState.RUNNING);
TaskAttempt task1Attempt = mapTask1.getAttempts().values().iterator()
.next();
TaskAttempt task2Attempt = mapTask2.getAttempts().values().iterator()
.next();
TaskAttempt task3Attempt = mapTask3.getAttempts().values().iterator()
.next();
// before sending the TA_DONE, event make sure attempt has come to
// RUNNING state
app.waitForState(task1Attempt, TaskAttemptState.RUNNING);
app.waitForState(task2Attempt, TaskAttemptState.RUNNING);
app.waitForState(task3Attempt, TaskAttemptState.RUNNING);
// send the done signal to the 1st two maps
app.getContext()
.getEventHandler()
.handle(
new TaskAttemptEvent(task1Attempt.getID(),
TaskAttemptEventType.TA_DONE));
app.getContext()
.getEventHandler()
.handle(
new TaskAttemptEvent(task2Attempt.getID(),
TaskAttemptEventType.TA_DONE));
// wait for first two map task to complete
app.waitForState(mapTask1, TaskState.SUCCEEDED);
app.waitForState(mapTask2, TaskState.SUCCEEDED);
// stop the app
app.stop();
// rerun
// in rerun the 1st two map will be recovered from previous run
app = new MRAppWithHistory(2, 1, false, this.getClass().getName(), false,
++runCount);
conf = new Configuration();
conf.setClass("mapred.output.committer.class",
TestFileOutputCommitter.class,
org.apache.hadoop.mapred.OutputCommitter.class);
conf.setBoolean("want.am.recovery", true);
conf.set(FileOutputFormat.OUTDIR, outputDir.toString());
// Set num-reduces explicitly in conf as recovery logic depends on it.
conf.setInt(MRJobConfig.NUM_REDUCES, 0);
conf.setBoolean(MRJobConfig.JOB_UBERTASK_ENABLE, false);
job = app.submit(conf);
app.waitForState(job, JobState.RUNNING);
Assert.assertEquals("No of tasks not correct", 3, job.getTasks().size());
it = job.getTasks().values().iterator();
mapTask1 = it.next();
mapTask2 = it.next();
mapTask3 = it.next();
// first two maps will be recovered, no need to send done
app.waitForState(mapTask1, TaskState.SUCCEEDED);
app.waitForState(mapTask2, TaskState.SUCCEEDED);
app.waitForState(mapTask3, TaskState.RUNNING);
task3Attempt = mapTask3.getAttempts().values().iterator().next();
// before sending the TA_DONE, event make sure attempt has come to
// RUNNING state
app.waitForState(task3Attempt, TaskAttemptState.RUNNING);
// send the done signal to the 3rd map task
app.getContext()
.getEventHandler()
.handle(
new TaskAttemptEvent(mapTask3.getAttempts().values().iterator()
.next().getID(), TaskAttemptEventType.TA_DONE));
// wait to get it completed
app.waitForState(mapTask3, TaskState.SUCCEEDED);
app.waitForState(job, JobState.SUCCEEDED);
app.verifyCompleted();
}
/**
* This test case primarily verifies if the recovery is controlled through config
* property. In this case, recover is turned OFF. AM with 3 maps and 0 reduce.
* AM crashes after the first two tasks finishes and recovery fails and have
* to rerun fully in the second generation and succeeds.
*
* @throws Exception
*/
@Test
public void testRecoveryFailsUsingCustomOutputCommitter() throws Exception {
int runCount = 0;
MRApp app =
new MRAppWithHistory(3, 0, false, this.getClass().getName(), true,
++runCount);
Configuration conf = new Configuration();
conf.setClass("mapred.output.committer.class", TestFileOutputCommitter.class,
org.apache.hadoop.mapred.OutputCommitter.class);
conf.set(FileOutputFormat.OUTDIR, outputDir.toString());
conf.setBoolean("want.am.recovery", false);
Job job = app.submit(conf);
app.waitForState(job, JobState.RUNNING);
// all maps would be running
Assert.assertEquals("No of tasks not correct", 3, job.getTasks().size());
Iterator<Task> it = job.getTasks().values().iterator();
Task mapTask1 = it.next();
Task mapTask2 = it.next();
Task mapTask3 = it.next();
// all maps must be running
app.waitForState(mapTask1, TaskState.RUNNING);
app.waitForState(mapTask2, TaskState.RUNNING);
app.waitForState(mapTask3, TaskState.RUNNING);
TaskAttempt task1Attempt =
mapTask1.getAttempts().values().iterator().next();
TaskAttempt task2Attempt =
mapTask2.getAttempts().values().iterator().next();
TaskAttempt task3Attempt =
mapTask3.getAttempts().values().iterator().next();
// before sending the TA_DONE, event make sure attempt has come to
// RUNNING state
app.waitForState(task1Attempt, TaskAttemptState.RUNNING);
app.waitForState(task2Attempt, TaskAttemptState.RUNNING);
app.waitForState(task3Attempt, TaskAttemptState.RUNNING);
// send the done signal to the 1st two maps
app
.getContext()
.getEventHandler()
.handle(
new TaskAttemptEvent(task1Attempt.getID(), TaskAttemptEventType.TA_DONE));
app
.getContext()
.getEventHandler()
.handle(
new TaskAttemptEvent(task2Attempt.getID(), TaskAttemptEventType.TA_DONE));
// wait for first two map task to complete
app.waitForState(mapTask1, TaskState.SUCCEEDED);
app.waitForState(mapTask2, TaskState.SUCCEEDED);
// stop the app
app.stop();
// rerun
// in rerun the 1st two map will be recovered from previous run
app =
new MRAppWithHistory(2, 1, false, this.getClass().getName(), false,
++runCount);
conf = new Configuration();
conf.setClass("mapred.output.committer.class", TestFileOutputCommitter.class,
org.apache.hadoop.mapred.OutputCommitter.class);
conf.setBoolean("want.am.recovery", false);
conf.set(FileOutputFormat.OUTDIR, outputDir.toString());
// Set num-reduces explicitly in conf as recovery logic depends on it.
conf.setInt(MRJobConfig.NUM_REDUCES, 0);
conf.setBoolean(MRJobConfig.JOB_UBERTASK_ENABLE, false);
job = app.submit(conf);
app.waitForState(job, JobState.RUNNING);
Assert.assertEquals("No of tasks not correct", 3, job.getTasks().size());
it = job.getTasks().values().iterator();
mapTask1 = it.next();
mapTask2 = it.next();
mapTask3 = it.next();
// first two maps will NOT be recovered, need to send done from them
app.waitForState(mapTask1, TaskState.RUNNING);
app.waitForState(mapTask2, TaskState.RUNNING);
app.waitForState(mapTask3, TaskState.RUNNING);
task3Attempt = mapTask3.getAttempts().values().iterator().next();
// before sending the TA_DONE, event make sure attempt has come to
// RUNNING state
app.waitForState(task3Attempt, TaskAttemptState.RUNNING);
// send the done signal to all 3 tasks map task
app
.getContext()
.getEventHandler()
.handle(
new TaskAttemptEvent(mapTask1.getAttempts().values().iterator().next()
.getID(), TaskAttemptEventType.TA_DONE));
app
.getContext()
.getEventHandler()
.handle(
new TaskAttemptEvent(mapTask2.getAttempts().values().iterator().next()
.getID(), TaskAttemptEventType.TA_DONE));
app
.getContext()
.getEventHandler()
.handle(
new TaskAttemptEvent(mapTask3.getAttempts().values().iterator().next()
.getID(), TaskAttemptEventType.TA_DONE));
// wait to get it completed
app.waitForState(mapTask3, TaskState.SUCCEEDED);
app.waitForState(job, JobState.SUCCEEDED);
app.verifyCompleted();
}
@Test
public void testMultipleCrashes() throws Exception {

6
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapred/FileOutputCommitter.java
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@ -184,10 +184,16 @@ public boolean needsTaskCommit(TaskAttemptContext context)
}
@Override
@Deprecated
public boolean isRecoverySupported() {
return true;
}
@Override
public boolean isRecoverySupported(JobContext context) throws IOException {
return getWrapped(context).isRecoverySupported(context);
}
@Override
public void recoverTask(TaskAttemptContext context)
throws IOException {

35
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapred/OutputCommitter.java
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@ -176,14 +176,34 @@ public abstract void abortTask(TaskAttemptContext taskContext)
/**
* This method implements the new interface by calling the old method. Note
* that the input types are different between the new and old apis and this
* is a bridge between the two.
* that the input types are different between the new and old apis and this is
* a bridge between the two.
*
* @deprecated Use {@link #isRecoverySupported(JobContext)} instead.
*/
@Deprecated
@Override
public boolean isRecoverySupported() {
return false;
}
/**
* Is task output recovery supported for restarting jobs?
*
* If task output recovery is supported, job restart can be done more
* efficiently.
*
* @param jobContext
* Context of the job whose output is being written.
* @return <code>true</code> if task output recovery is supported,
* <code>false</code> otherwise
* @throws IOException
* @see #recoverTask(TaskAttemptContext)
*/
public boolean isRecoverySupported(JobContext jobContext) throws IOException {
return isRecoverySupported();
}
/**
* Recover the task output.
*
@ -315,4 +335,15 @@ void recoverTask(org.apache.hadoop.mapreduce.TaskAttemptContext taskContext
recoverTask((TaskAttemptContext) taskContext);
}
/**
* This method implements the new interface by calling the old method. Note
* that the input types are different between the new and old apis and this is
* a bridge between the two.
*/
@Override
public final boolean isRecoverySupported(
org.apache.hadoop.mapreduce.JobContext context) throws IOException {
return isRecoverySupported((JobContext) context);
}
}

19
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/OutputCommitter.java
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@ -182,11 +182,30 @@ public abstract void abortTask(TaskAttemptContext taskContext)
* @return <code>true</code> if task output recovery is supported,
* <code>false</code> otherwise
* @see #recoverTask(TaskAttemptContext)
* @deprecated Use {@link #isRecoverySupported(JobContext)} instead.
*/
@Deprecated
public boolean isRecoverySupported() {
return false;
}
/**
* Is task output recovery supported for restarting jobs?
*
* If task output recovery is supported, job restart can be done more
* efficiently.
*
* @param jobContext
* Context of the job whose output is being written.
* @return <code>true</code> if task output recovery is supported,
* <code>false</code> otherwise
* @throws IOException
* @see #recoverTask(TaskAttemptContext)
*/
public boolean isRecoverySupported(JobContext jobContext) throws IOException {
return isRecoverySupported();
}
/**
* Recover the task output.
*

1
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/lib/output/FileOutputCommitter.java
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@ -495,6 +495,7 @@ public boolean needsTaskCommit(TaskAttemptContext context, Path taskAttemptPath
}
@Override
@Deprecated
public boolean isRecoverySupported() {
return true;
}

1
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/lib/output/NullOutputFormat.java
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@ -60,6 +60,7 @@ public void setupJob(JobContext jobContext) { }
public void setupTask(TaskAttemptContext taskContext) { }
@Override
@Deprecated
public boolean isRecoverySupported() {
return true;
}