MAPREDUCE-2708. Designed and implemented MR Application Master recovery to make MR AMs resume their progress after restart. Contributed by Sharad Agarwal.
svn merge -c r1188043 --ignore-ancestry ../../trunk/ git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.23@1188044 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Vinod Kumar Vavilapalli
parent
8f5c47794f
commit
6069c2a82d
|
|
@ -62,6 +62,9 @@ Release 0.23.0 - Unreleased
|
|||
|
||||
MAPREDUCE-3104. Implemented Application-acls. (vinodkv)
|
||||
|
||||
MAPREDUCE-2708. Designed and implemented MR Application Master recovery to
|
||||
make MR AMs resume their progress after restart. (Sharad Agarwal via vinodkv)
|
||||
|
||||
IMPROVEMENTS
|
||||
|
||||
MAPREDUCE-2187. Reporter sends progress during sort/merge. (Anupam Seth via
|
||||
|
|
|
|||
|
|
@ -29,11 +29,9 @@ import org.apache.hadoop.mapred.TaskLog.LogName;
|
|||
import org.apache.hadoop.mapreduce.ID;
|
||||
import org.apache.hadoop.mapreduce.MRJobConfig;
|
||||
import org.apache.hadoop.mapreduce.v2.util.MRApps;
|
||||
import org.apache.hadoop.yarn.util.Apps;
|
||||
import org.apache.hadoop.yarn.api.ApplicationConstants;
|
||||
import org.apache.hadoop.yarn.api.ApplicationConstants.Environment;
|
||||
import org.apache.hadoop.util.StringUtils;
|
||||
import org.apache.hadoop.yarn.conf.YarnConfiguration;
|
||||
import org.apache.hadoop.yarn.util.Apps;
|
||||
|
||||
public class MapReduceChildJVM {
|
||||
|
||||
|
|
@ -131,6 +129,8 @@ public class MapReduceChildJVM {
|
|||
MRJobConfig.STDERR_LOGFILE_ENV,
|
||||
getTaskLogFile(TaskLog.LogName.STDERR)
|
||||
);
|
||||
environment.put(MRJobConfig.APPLICATION_ATTEMPT_ID_ENV,
|
||||
conf.get(MRJobConfig.APPLICATION_ATTEMPT_ID).toString());
|
||||
}
|
||||
|
||||
private static String getChildJavaOpts(JobConf jobConf, boolean isMapTask) {
|
||||
|
|
|
|||
|
|
@ -239,6 +239,14 @@ class YarnChild {
|
|||
Token<JobTokenIdentifier> jt) throws IOException {
|
||||
final JobConf job = new JobConf(MRJobConfig.JOB_CONF_FILE);
|
||||
job.setCredentials(credentials);
|
||||
|
||||
String appAttemptIdEnv = System
|
||||
.getenv(MRJobConfig.APPLICATION_ATTEMPT_ID_ENV);
|
||||
LOG.debug("APPLICATION_ATTEMPT_ID: " + appAttemptIdEnv);
|
||||
// Set it in conf, so as to be able to be used the the OutputCommitter.
|
||||
job.setInt(MRJobConfig.APPLICATION_ATTEMPT_ID, Integer
|
||||
.parseInt(appAttemptIdEnv));
|
||||
|
||||
// set tcp nodelay
|
||||
job.setBoolean("ipc.client.tcpnodelay", true);
|
||||
job.setClass(MRConfig.TASK_LOCAL_OUTPUT_CLASS,
|
||||
|
|
|
|||
|
|
@ -36,18 +36,25 @@ import org.apache.hadoop.conf.Configuration;
|
|||
import org.apache.hadoop.fs.FileContext;
|
||||
import org.apache.hadoop.fs.FileSystem;
|
||||
import org.apache.hadoop.fs.Path;
|
||||
import org.apache.hadoop.mapred.FileOutputCommitter;
|
||||
import org.apache.hadoop.mapred.JobConf;
|
||||
import org.apache.hadoop.mapred.LocalContainerLauncher;
|
||||
import org.apache.hadoop.mapred.TaskAttemptListenerImpl;
|
||||
import org.apache.hadoop.mapred.TaskUmbilicalProtocol;
|
||||
import org.apache.hadoop.mapreduce.MRJobConfig;
|
||||
import org.apache.hadoop.mapreduce.OutputCommitter;
|
||||
import org.apache.hadoop.mapreduce.OutputFormat;
|
||||
import org.apache.hadoop.mapreduce.TaskAttemptContext;
|
||||
import org.apache.hadoop.mapreduce.TypeConverter;
|
||||
import org.apache.hadoop.mapreduce.jobhistory.AMStartedEvent;
|
||||
import org.apache.hadoop.mapreduce.jobhistory.JobHistoryEvent;
|
||||
import org.apache.hadoop.mapreduce.jobhistory.JobHistoryEventHandler;
|
||||
import org.apache.hadoop.mapreduce.jobhistory.JobHistoryParser.AMInfo;
|
||||
import org.apache.hadoop.mapreduce.jobhistory.AMStartedEvent;
|
||||
import org.apache.hadoop.mapreduce.security.token.JobTokenSecretManager;
|
||||
import org.apache.hadoop.mapreduce.task.TaskAttemptContextImpl;
|
||||
import org.apache.hadoop.mapreduce.v2.api.records.JobId;
|
||||
import org.apache.hadoop.mapreduce.v2.api.records.TaskId;
|
||||
import org.apache.hadoop.mapreduce.v2.api.records.TaskType;
|
||||
import org.apache.hadoop.mapreduce.v2.app.client.ClientService;
|
||||
import org.apache.hadoop.mapreduce.v2.app.client.MRClientService;
|
||||
import org.apache.hadoop.mapreduce.v2.app.job.Job;
|
||||
|
|
@ -76,12 +83,14 @@ import org.apache.hadoop.mapreduce.v2.app.speculate.Speculator;
|
|||
import org.apache.hadoop.mapreduce.v2.app.speculate.SpeculatorEvent;
|
||||
import org.apache.hadoop.mapreduce.v2.app.taskclean.TaskCleaner;
|
||||
import org.apache.hadoop.mapreduce.v2.app.taskclean.TaskCleanerImpl;
|
||||
import org.apache.hadoop.mapreduce.v2.util.MRBuilderUtils;
|
||||
import org.apache.hadoop.metrics2.lib.DefaultMetricsSystem;
|
||||
import org.apache.hadoop.net.NetUtils;
|
||||
import org.apache.hadoop.security.Credentials;
|
||||
import org.apache.hadoop.security.UserGroupInformation;
|
||||
import org.apache.hadoop.security.token.Token;
|
||||
import org.apache.hadoop.security.token.TokenIdentifier;
|
||||
import org.apache.hadoop.util.ReflectionUtils;
|
||||
import org.apache.hadoop.yarn.Clock;
|
||||
import org.apache.hadoop.yarn.SystemClock;
|
||||
import org.apache.hadoop.yarn.YarnException;
|
||||
|
|
@ -93,6 +102,8 @@ import org.apache.hadoop.yarn.conf.YarnConfiguration;
|
|||
import org.apache.hadoop.yarn.event.AsyncDispatcher;
|
||||
import org.apache.hadoop.yarn.event.Dispatcher;
|
||||
import org.apache.hadoop.yarn.event.EventHandler;
|
||||
import org.apache.hadoop.yarn.factories.RecordFactory;
|
||||
import org.apache.hadoop.yarn.factory.providers.RecordFactoryProvider;
|
||||
import org.apache.hadoop.yarn.service.AbstractService;
|
||||
import org.apache.hadoop.yarn.service.CompositeService;
|
||||
import org.apache.hadoop.yarn.service.Service;
|
||||
|
|
@ -121,6 +132,9 @@ public class MRAppMaster extends CompositeService {
|
|||
|
||||
private static final Log LOG = LogFactory.getLog(MRAppMaster.class);
|
||||
|
||||
private final RecordFactory recordFactory =
|
||||
RecordFactoryProvider.getRecordFactory(null);
|
||||
|
||||
private Clock clock;
|
||||
private final long startTime;
|
||||
private final long appSubmitTime;
|
||||
|
|
@ -143,6 +157,9 @@ public class MRAppMaster extends CompositeService {
|
|||
private TaskAttemptListener taskAttemptListener;
|
||||
private JobTokenSecretManager jobTokenSecretManager =
|
||||
new JobTokenSecretManager();
|
||||
private JobId jobId;
|
||||
private boolean newApiCommitter;
|
||||
private OutputCommitter committer;
|
||||
private JobEventDispatcher jobEventDispatcher;
|
||||
private boolean inRecovery = false;
|
||||
|
||||
|
|
@ -182,15 +199,39 @@ public class MRAppMaster extends CompositeService {
|
|||
// for an app later
|
||||
appName = conf.get(MRJobConfig.JOB_NAME, "<missing app name>");
|
||||
|
||||
if (conf.getBoolean(MRJobConfig.MR_AM_JOB_RECOVERY_ENABLE, false)
|
||||
&& appAttemptID.getAttemptId() > 1) {
|
||||
LOG.info("Recovery is enabled. Will try to recover from previous life.");
|
||||
recoveryServ = new RecoveryService(appAttemptID, clock);
|
||||
conf.setInt(MRJobConfig.APPLICATION_ATTEMPT_ID, appAttemptID.getAttemptId());
|
||||
|
||||
newApiCommitter = false;
|
||||
jobId = MRBuilderUtils.newJobId(appAttemptID.getApplicationId(),
|
||||
appAttemptID.getApplicationId().getId());
|
||||
int numReduceTasks = conf.getInt(MRJobConfig.NUM_REDUCES, 0);
|
||||
if ((numReduceTasks > 0 &&
|
||||
conf.getBoolean("mapred.reducer.new-api", false)) ||
|
||||
(numReduceTasks == 0 &&
|
||||
conf.getBoolean("mapred.mapper.new-api", false))) {
|
||||
newApiCommitter = true;
|
||||
LOG.info("Using mapred newApiCommitter.");
|
||||
}
|
||||
|
||||
committer = createOutputCommitter(conf);
|
||||
boolean recoveryEnabled = conf.getBoolean(
|
||||
MRJobConfig.MR_AM_JOB_RECOVERY_ENABLE, true);
|
||||
boolean recoverySupportedByCommitter = committer.isRecoverySupported();
|
||||
if (recoveryEnabled && recoverySupportedByCommitter
|
||||
&& appAttemptID.getAttemptId() > 1) {
|
||||
LOG.info("Recovery is enabled. "
|
||||
+ "Will try to recover from previous life on best effort basis.");
|
||||
recoveryServ = new RecoveryService(appAttemptID, clock,
|
||||
committer);
|
||||
addIfService(recoveryServ);
|
||||
dispatcher = recoveryServ.getDispatcher();
|
||||
clock = recoveryServ.getClock();
|
||||
inRecovery = true;
|
||||
} else {
|
||||
LOG.info("Not starting RecoveryService: recoveryEnabled: "
|
||||
+ recoveryEnabled + " recoverySupportedByCommitter: "
|
||||
+ recoverySupportedByCommitter + " ApplicationAttemptID: "
|
||||
+ appAttemptID.getAttemptId());
|
||||
dispatcher = new AsyncDispatcher();
|
||||
addIfService(dispatcher);
|
||||
}
|
||||
|
|
@ -253,6 +294,35 @@ public class MRAppMaster extends CompositeService {
|
|||
super.init(conf);
|
||||
} // end of init()
|
||||
|
||||
private OutputCommitter createOutputCommitter(Configuration conf) {
|
||||
OutputCommitter committer = null;
|
||||
|
||||
LOG.info("OutputCommitter set in config "
|
||||
+ conf.get("mapred.output.committer.class"));
|
||||
|
||||
if (newApiCommitter) {
|
||||
org.apache.hadoop.mapreduce.v2.api.records.TaskId taskID = MRBuilderUtils
|
||||
.newTaskId(jobId, 0, TaskType.MAP);
|
||||
org.apache.hadoop.mapreduce.v2.api.records.TaskAttemptId attemptID = MRBuilderUtils
|
||||
.newTaskAttemptId(taskID, 0);
|
||||
TaskAttemptContext taskContext = new TaskAttemptContextImpl(conf,
|
||||
TypeConverter.fromYarn(attemptID));
|
||||
OutputFormat outputFormat;
|
||||
try {
|
||||
outputFormat = ReflectionUtils.newInstance(taskContext
|
||||
.getOutputFormatClass(), conf);
|
||||
committer = outputFormat.getOutputCommitter(taskContext);
|
||||
} catch (Exception e) {
|
||||
throw new YarnException(e);
|
||||
}
|
||||
} else {
|
||||
committer = ReflectionUtils.newInstance(conf.getClass(
|
||||
"mapred.output.committer.class", FileOutputCommitter.class,
|
||||
org.apache.hadoop.mapred.OutputCommitter.class), conf);
|
||||
}
|
||||
LOG.info("OutputCommitter is " + committer.getClass().getName());
|
||||
return committer;
|
||||
}
|
||||
|
||||
protected boolean keepJobFiles(JobConf conf) {
|
||||
return (conf.getKeepTaskFilesPattern() != null || conf
|
||||
|
|
@ -348,10 +418,10 @@ public class MRAppMaster extends CompositeService {
|
|||
protected Job createJob(Configuration conf) {
|
||||
|
||||
// create single job
|
||||
Job newJob = new JobImpl(appAttemptID, conf, dispatcher.getEventHandler(),
|
||||
taskAttemptListener, jobTokenSecretManager, fsTokens, clock,
|
||||
completedTasksFromPreviousRun, metrics, currentUser.getUserName(),
|
||||
appSubmitTime, amInfos);
|
||||
Job newJob = new JobImpl(jobId, appAttemptID, conf, dispatcher
|
||||
.getEventHandler(), taskAttemptListener, jobTokenSecretManager,
|
||||
fsTokens, clock, completedTasksFromPreviousRun, metrics, committer,
|
||||
newApiCommitter, currentUser.getUserName(), appSubmitTime, amInfos);
|
||||
((RunningAppContext) context).jobs.put(newJob.getID(), newJob);
|
||||
|
||||
dispatcher.register(JobFinishEvent.Type.class,
|
||||
|
|
@ -471,6 +541,22 @@ public class MRAppMaster extends CompositeService {
|
|||
return appAttemptID.getApplicationId();
|
||||
}
|
||||
|
||||
public ApplicationAttemptId getAttemptID() {
|
||||
return appAttemptID;
|
||||
}
|
||||
|
||||
public JobId getJobId() {
|
||||
return jobId;
|
||||
}
|
||||
|
||||
public OutputCommitter getCommitter() {
|
||||
return committer;
|
||||
}
|
||||
|
||||
public boolean isNewApiCommitter() {
|
||||
return newApiCommitter;
|
||||
}
|
||||
|
||||
public int getStartCount() {
|
||||
return appAttemptID.getAttemptId();
|
||||
}
|
||||
|
|
|
|||
|
|
@ -39,15 +39,12 @@ import org.apache.hadoop.conf.Configuration;
|
|||
import org.apache.hadoop.fs.FileSystem;
|
||||
import org.apache.hadoop.fs.Path;
|
||||
import org.apache.hadoop.io.Text;
|
||||
import org.apache.hadoop.mapred.FileOutputCommitter;
|
||||
import org.apache.hadoop.mapred.JobACLsManager;
|
||||
import org.apache.hadoop.mapred.JobConf;
|
||||
import org.apache.hadoop.mapreduce.JobACL;
|
||||
import org.apache.hadoop.mapreduce.JobContext;
|
||||
import org.apache.hadoop.mapreduce.MRJobConfig;
|
||||
import org.apache.hadoop.mapreduce.OutputCommitter;
|
||||
import org.apache.hadoop.mapreduce.OutputFormat;
|
||||
import org.apache.hadoop.mapreduce.TaskAttemptContext;
|
||||
import org.apache.hadoop.mapreduce.TypeConverter;
|
||||
import org.apache.hadoop.mapreduce.jobhistory.JobFinishedEvent;
|
||||
import org.apache.hadoop.mapreduce.jobhistory.JobHistoryEvent;
|
||||
|
|
@ -64,7 +61,6 @@ import org.apache.hadoop.mapreduce.security.token.JobTokenSecretManager;
|
|||
import org.apache.hadoop.mapreduce.split.JobSplit.TaskSplitMetaInfo;
|
||||
import org.apache.hadoop.mapreduce.split.SplitMetaInfoReader;
|
||||
import org.apache.hadoop.mapreduce.task.JobContextImpl;
|
||||
import org.apache.hadoop.mapreduce.task.TaskAttemptContextImpl;
|
||||
import org.apache.hadoop.mapreduce.v2.api.records.Counter;
|
||||
import org.apache.hadoop.mapreduce.v2.api.records.CounterGroup;
|
||||
import org.apache.hadoop.mapreduce.v2.api.records.Counters;
|
||||
|
|
@ -98,14 +94,11 @@ import org.apache.hadoop.security.Credentials;
|
|||
import org.apache.hadoop.security.UserGroupInformation;
|
||||
import org.apache.hadoop.security.authorize.AccessControlList;
|
||||
import org.apache.hadoop.security.token.Token;
|
||||
import org.apache.hadoop.util.ReflectionUtils;
|
||||
import org.apache.hadoop.util.StringUtils;
|
||||
import org.apache.hadoop.yarn.Clock;
|
||||
import org.apache.hadoop.yarn.YarnException;
|
||||
import org.apache.hadoop.yarn.api.records.ApplicationAttemptId;
|
||||
import org.apache.hadoop.yarn.api.records.ApplicationId;
|
||||
import org.apache.hadoop.yarn.event.EventHandler;
|
||||
import org.apache.hadoop.yarn.factories.RecordFactory;
|
||||
import org.apache.hadoop.yarn.factory.providers.RecordFactoryProvider;
|
||||
import org.apache.hadoop.yarn.state.InvalidStateTransitonException;
|
||||
import org.apache.hadoop.yarn.state.MultipleArcTransition;
|
||||
|
|
@ -127,14 +120,12 @@ public class JobImpl implements org.apache.hadoop.mapreduce.v2.app.job.Job,
|
|||
// Maximum no. of fetch-failure notifications after which map task is failed
|
||||
private static final int MAX_FETCH_FAILURES_NOTIFICATIONS = 3;
|
||||
|
||||
private final RecordFactory recordFactory =
|
||||
RecordFactoryProvider.getRecordFactory(null);
|
||||
|
||||
//final fields
|
||||
private final ApplicationAttemptId applicationAttemptId;
|
||||
private final Clock clock;
|
||||
private final JobACLsManager aclsManager;
|
||||
private final String username;
|
||||
private final OutputCommitter committer;
|
||||
private final Map<JobACL, AccessControlList> jobACLs;
|
||||
private final Set<TaskId> completedTasksFromPreviousRun;
|
||||
private final List<AMInfo> amInfos;
|
||||
|
|
@ -142,6 +133,7 @@ public class JobImpl implements org.apache.hadoop.mapreduce.v2.app.job.Job,
|
|||
private final Lock writeLock;
|
||||
private final JobId jobId;
|
||||
private final String jobName;
|
||||
private final boolean newApiCommitter;
|
||||
private final org.apache.hadoop.mapreduce.JobID oldJobId;
|
||||
private final TaskAttemptListener taskAttemptListener;
|
||||
private final Object tasksSyncHandle = new Object();
|
||||
|
|
@ -167,7 +159,6 @@ public class JobImpl implements org.apache.hadoop.mapreduce.v2.app.job.Job,
|
|||
private Path remoteJobSubmitDir;
|
||||
public Path remoteJobConfFile;
|
||||
private JobContext jobContext;
|
||||
private OutputCommitter committer;
|
||||
private int allowedMapFailuresPercent = 0;
|
||||
private int allowedReduceFailuresPercent = 0;
|
||||
private List<TaskAttemptCompletionEvent> taskAttemptCompletionEvents;
|
||||
|
|
@ -367,14 +358,16 @@ public class JobImpl implements org.apache.hadoop.mapreduce.v2.app.job.Job,
|
|||
private Token<JobTokenIdentifier> jobToken;
|
||||
private JobTokenSecretManager jobTokenSecretManager;
|
||||
|
||||
public JobImpl(ApplicationAttemptId applicationAttemptId, Configuration conf,
|
||||
EventHandler eventHandler, TaskAttemptListener taskAttemptListener,
|
||||
public JobImpl(JobId jobId, ApplicationAttemptId applicationAttemptId,
|
||||
Configuration conf, EventHandler eventHandler,
|
||||
TaskAttemptListener taskAttemptListener,
|
||||
JobTokenSecretManager jobTokenSecretManager,
|
||||
Credentials fsTokenCredentials, Clock clock,
|
||||
Set<TaskId> completedTasksFromPreviousRun, MRAppMetrics metrics,
|
||||
String userName, long appSubmitTime, List<AMInfo> amInfos) {
|
||||
OutputCommitter committer, boolean newApiCommitter, String userName,
|
||||
long appSubmitTime, List<AMInfo> amInfos) {
|
||||
this.applicationAttemptId = applicationAttemptId;
|
||||
this.jobId = recordFactory.newRecordInstance(JobId.class);
|
||||
this.jobId = jobId;
|
||||
this.jobName = conf.get(JobContext.JOB_NAME, "<missing job name>");
|
||||
this.conf = conf;
|
||||
this.metrics = metrics;
|
||||
|
|
@ -383,14 +376,8 @@ public class JobImpl implements org.apache.hadoop.mapreduce.v2.app.job.Job,
|
|||
this.amInfos = amInfos;
|
||||
this.userName = userName;
|
||||
this.appSubmitTime = appSubmitTime;
|
||||
ApplicationId applicationId = applicationAttemptId.getApplicationId();
|
||||
jobId.setAppId(applicationId);
|
||||
jobId.setId(applicationId.getId());
|
||||
oldJobId = TypeConverter.fromYarn(jobId);
|
||||
LOG.info("Job created" +
|
||||
" appId=" + applicationId +
|
||||
" jobId=" + jobId +
|
||||
" oldJobId=" + oldJobId);
|
||||
this.oldJobId = TypeConverter.fromYarn(jobId);
|
||||
this.newApiCommitter = newApiCommitter;
|
||||
|
||||
this.taskAttemptListener = taskAttemptListener;
|
||||
this.eventHandler = eventHandler;
|
||||
|
|
@ -400,6 +387,7 @@ public class JobImpl implements org.apache.hadoop.mapreduce.v2.app.job.Job,
|
|||
|
||||
this.fsTokens = fsTokenCredentials;
|
||||
this.jobTokenSecretManager = jobTokenSecretManager;
|
||||
this.committer = committer;
|
||||
|
||||
this.aclsManager = new JobACLsManager(conf);
|
||||
this.username = System.getProperty("user.name");
|
||||
|
|
@ -854,47 +842,13 @@ public class JobImpl implements org.apache.hadoop.mapreduce.v2.app.job.Job,
|
|||
|
||||
checkTaskLimits();
|
||||
|
||||
|
||||
boolean newApiCommitter = false;
|
||||
if ((job.numReduceTasks > 0 &&
|
||||
job.conf.getBoolean("mapred.reducer.new-api", false)) ||
|
||||
(job.numReduceTasks == 0 &&
|
||||
job.conf.getBoolean("mapred.mapper.new-api", false))) {
|
||||
newApiCommitter = true;
|
||||
LOG.info("Using mapred newApiCommitter.");
|
||||
}
|
||||
|
||||
LOG.info("OutputCommitter set in config " + job.conf.get(
|
||||
"mapred.output.committer.class"));
|
||||
|
||||
if (newApiCommitter) {
|
||||
if (job.newApiCommitter) {
|
||||
job.jobContext = new JobContextImpl(job.conf,
|
||||
job.oldJobId);
|
||||
org.apache.hadoop.mapreduce.v2.api.records.TaskAttemptId attemptID
|
||||
= RecordFactoryProvider.getRecordFactory(null)
|
||||
.newRecordInstance(
|
||||
org.apache.hadoop.mapreduce.v2.api.records.TaskAttemptId.class);
|
||||
attemptID.setTaskId(RecordFactoryProvider.getRecordFactory(null)
|
||||
.newRecordInstance(TaskId.class));
|
||||
attemptID.getTaskId().setJobId(job.jobId);
|
||||
attemptID.getTaskId().setTaskType(TaskType.MAP);
|
||||
TaskAttemptContext taskContext = new TaskAttemptContextImpl(job.conf,
|
||||
TypeConverter.fromYarn(attemptID));
|
||||
try {
|
||||
OutputFormat outputFormat = ReflectionUtils.newInstance(
|
||||
taskContext.getOutputFormatClass(), job.conf);
|
||||
job.committer = outputFormat.getOutputCommitter(taskContext);
|
||||
} catch(Exception e) {
|
||||
throw new IOException("Failed to assign outputcommitter", e);
|
||||
}
|
||||
} else {
|
||||
job.jobContext = new org.apache.hadoop.mapred.JobContextImpl(
|
||||
new JobConf(job.conf), job.oldJobId);
|
||||
job.committer = ReflectionUtils.newInstance(
|
||||
job.conf.getClass("mapred.output.committer.class", FileOutputCommitter.class,
|
||||
org.apache.hadoop.mapred.OutputCommitter.class), job.conf);
|
||||
}
|
||||
LOG.info("OutputCommitter is " + job.committer.getClass().getName());
|
||||
|
||||
long inputLength = 0;
|
||||
for (int i = 0; i < job.numMapTasks; ++i) {
|
||||
|
|
|
|||
|
|
@ -32,17 +32,23 @@ import org.apache.hadoop.conf.Configuration;
|
|||
import org.apache.hadoop.fs.FSDataInputStream;
|
||||
import org.apache.hadoop.fs.FileContext;
|
||||
import org.apache.hadoop.fs.Path;
|
||||
import org.apache.hadoop.mapreduce.OutputCommitter;
|
||||
import org.apache.hadoop.mapreduce.TaskAttemptContext;
|
||||
import org.apache.hadoop.mapreduce.TypeConverter;
|
||||
import org.apache.hadoop.mapreduce.jobhistory.JobHistoryParser;
|
||||
import org.apache.hadoop.mapreduce.jobhistory.JobHistoryParser.JobInfo;
|
||||
import org.apache.hadoop.mapreduce.jobhistory.JobHistoryParser.AMInfo;
|
||||
import org.apache.hadoop.mapreduce.jobhistory.JobHistoryParser.JobInfo;
|
||||
import org.apache.hadoop.mapreduce.jobhistory.JobHistoryParser.TaskAttemptInfo;
|
||||
import org.apache.hadoop.mapreduce.jobhistory.JobHistoryParser.TaskInfo;
|
||||
import org.apache.hadoop.mapreduce.task.TaskAttemptContextImpl;
|
||||
import org.apache.hadoop.mapreduce.v2.api.records.Phase;
|
||||
import org.apache.hadoop.mapreduce.v2.api.records.TaskAttemptId;
|
||||
import org.apache.hadoop.mapreduce.v2.api.records.TaskAttemptState;
|
||||
import org.apache.hadoop.mapreduce.v2.api.records.TaskId;
|
||||
import org.apache.hadoop.mapreduce.v2.api.records.TaskState;
|
||||
import org.apache.hadoop.mapreduce.v2.app.job.event.JobDiagnosticsUpdateEvent;
|
||||
import org.apache.hadoop.mapreduce.v2.app.job.event.JobEvent;
|
||||
import org.apache.hadoop.mapreduce.v2.app.job.event.JobEventType;
|
||||
import org.apache.hadoop.mapreduce.v2.app.job.event.TaskAttemptContainerAssignedEvent;
|
||||
import org.apache.hadoop.mapreduce.v2.app.job.event.TaskAttemptContainerLaunchedEvent;
|
||||
import org.apache.hadoop.mapreduce.v2.app.job.event.TaskAttemptEvent;
|
||||
|
|
@ -53,6 +59,7 @@ import org.apache.hadoop.mapreduce.v2.app.job.event.TaskEvent;
|
|||
import org.apache.hadoop.mapreduce.v2.app.job.event.TaskEventType;
|
||||
import org.apache.hadoop.mapreduce.v2.app.job.event.TaskTAttemptEvent;
|
||||
import org.apache.hadoop.mapreduce.v2.app.launcher.ContainerLauncher;
|
||||
import org.apache.hadoop.mapreduce.v2.app.launcher.ContainerLauncherEvent;
|
||||
import org.apache.hadoop.mapreduce.v2.app.launcher.ContainerRemoteLaunchEvent;
|
||||
import org.apache.hadoop.mapreduce.v2.app.rm.ContainerAllocator;
|
||||
import org.apache.hadoop.mapreduce.v2.app.rm.ContainerAllocatorEvent;
|
||||
|
|
@ -84,9 +91,6 @@ import org.apache.hadoop.yarn.service.Service;
|
|||
|
||||
//TODO:
|
||||
//task cleanup for all non completed tasks
|
||||
//change job output committer to have
|
||||
// - atomic job output promotion
|
||||
// - recover output of completed tasks
|
||||
|
||||
public class RecoveryService extends CompositeService implements Recovery {
|
||||
|
||||
|
|
@ -95,6 +99,7 @@ public class RecoveryService extends CompositeService implements Recovery {
|
|||
private static final Log LOG = LogFactory.getLog(RecoveryService.class);
|
||||
|
||||
private final ApplicationAttemptId applicationAttemptId;
|
||||
private final OutputCommitter committer;
|
||||
private final Dispatcher dispatcher;
|
||||
private final ControlledClock clock;
|
||||
|
||||
|
|
@ -108,9 +113,10 @@ public class RecoveryService extends CompositeService implements Recovery {
|
|||
private volatile boolean recoveryMode = false;
|
||||
|
||||
public RecoveryService(ApplicationAttemptId applicationAttemptId,
|
||||
Clock clock) {
|
||||
Clock clock, OutputCommitter committer) {
|
||||
super("RecoveringDispatcher");
|
||||
this.applicationAttemptId = applicationAttemptId;
|
||||
this.committer = committer;
|
||||
this.dispatcher = new RecoveryDispatcher();
|
||||
this.clock = new ControlledClock(clock);
|
||||
addService((Service) dispatcher);
|
||||
|
|
@ -122,17 +128,17 @@ public class RecoveryService extends CompositeService implements Recovery {
|
|||
// parse the history file
|
||||
try {
|
||||
parse();
|
||||
if (completedTasks.size() > 0) {
|
||||
recoveryMode = true;
|
||||
LOG.info("SETTING THE RECOVERY MODE TO TRUE. NO OF COMPLETED TASKS " +
|
||||
"TO RECOVER " + completedTasks.size());
|
||||
LOG.info("Job launch time " + jobInfo.getLaunchTime());
|
||||
clock.setTime(jobInfo.getLaunchTime());
|
||||
}
|
||||
} catch (IOException e) {
|
||||
} catch (Exception e) {
|
||||
LOG.warn(e);
|
||||
LOG.warn("Could not parse the old history file. Aborting recovery. "
|
||||
+ "Starting afresh.");
|
||||
+ "Starting afresh.", e);
|
||||
}
|
||||
if (completedTasks.size() > 0) {
|
||||
recoveryMode = true;
|
||||
LOG.info("SETTING THE RECOVERY MODE TO TRUE. NO OF COMPLETED TASKS "
|
||||
+ "TO RECOVER " + completedTasks.size());
|
||||
LOG.info("Job launch time " + jobInfo.getLaunchTime());
|
||||
clock.setTime(jobInfo.getLaunchTime());
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -315,6 +321,20 @@ public class RecoveryService extends CompositeService implements Recovery {
|
|||
TaskAttemptState state = TaskAttemptState.valueOf(attInfo.getTaskStatus());
|
||||
switch (state) {
|
||||
case SUCCEEDED:
|
||||
//recover the task output
|
||||
TaskAttemptContext taskContext = new TaskAttemptContextImpl(getConfig(),
|
||||
attInfo.getAttemptId());
|
||||
try {
|
||||
committer.recoverTask(taskContext);
|
||||
} catch (IOException e) {
|
||||
actualHandler.handle(new JobDiagnosticsUpdateEvent(
|
||||
aId.getTaskId().getJobId(), "Error in recovering task output " +
|
||||
e.getMessage()));
|
||||
actualHandler.handle(new JobEvent(aId.getTaskId().getJobId(),
|
||||
JobEventType.INTERNAL_ERROR));
|
||||
}
|
||||
LOG.info("Recovered output from task attempt " + attInfo.getAttemptId());
|
||||
|
||||
// send the done event
|
||||
LOG.info("Sending done event to " + aId);
|
||||
actualHandler.handle(new TaskAttemptEvent(aId,
|
||||
|
|
@ -334,6 +354,16 @@ public class RecoveryService extends CompositeService implements Recovery {
|
|||
return;
|
||||
}
|
||||
|
||||
else if (event.getType() ==
|
||||
ContainerLauncher.EventType.CONTAINER_REMOTE_CLEANUP) {
|
||||
TaskAttemptId aId = ((ContainerLauncherEvent) event)
|
||||
.getTaskAttemptID();
|
||||
actualHandler.handle(
|
||||
new TaskAttemptEvent(aId,
|
||||
TaskAttemptEventType.TA_CONTAINER_CLEANED));
|
||||
return;
|
||||
}
|
||||
|
||||
// delegate to the actual handler
|
||||
actualHandler.handle(event);
|
||||
}
|
||||
|
|
|
|||
|
|
@ -32,6 +32,7 @@ import org.apache.hadoop.fs.FileContext;
|
|||
import org.apache.hadoop.fs.Path;
|
||||
import org.apache.hadoop.mapred.WrappedJvmID;
|
||||
import org.apache.hadoop.mapreduce.MRJobConfig;
|
||||
import org.apache.hadoop.mapreduce.OutputCommitter;
|
||||
import org.apache.hadoop.mapreduce.jobhistory.JobHistoryEvent;
|
||||
import org.apache.hadoop.mapreduce.security.token.JobTokenSecretManager;
|
||||
import org.apache.hadoop.mapreduce.split.JobSplit.TaskSplitMetaInfo;
|
||||
|
|
@ -264,9 +265,11 @@ public class MRApp extends MRAppMaster {
|
|||
} catch (IOException e) {
|
||||
throw new YarnException(e);
|
||||
}
|
||||
Job newJob = new TestJob(conf, getAppID(), getDispatcher().getEventHandler(),
|
||||
getTaskAttemptListener(), getContext().getClock(),
|
||||
currentUser.getUserName());
|
||||
Job newJob = new TestJob(getJobId(), getAttemptID(), conf,
|
||||
getDispatcher().getEventHandler(),
|
||||
getTaskAttemptListener(), getContext().getClock(),
|
||||
getCommitter(), isNewApiCommitter(),
|
||||
currentUser.getUserName());
|
||||
((AppContext) getContext()).getAllJobs().put(newJob.getID(), newJob);
|
||||
|
||||
getDispatcher().register(JobFinishEvent.Type.class,
|
||||
|
|
@ -413,13 +416,15 @@ public class MRApp extends MRAppMaster {
|
|||
return localStateMachine;
|
||||
}
|
||||
|
||||
public TestJob(Configuration conf, ApplicationId applicationId,
|
||||
EventHandler eventHandler, TaskAttemptListener taskAttemptListener,
|
||||
Clock clock, String user) {
|
||||
super(getApplicationAttemptId(applicationId, getStartCount()), conf,
|
||||
eventHandler, taskAttemptListener, new JobTokenSecretManager(),
|
||||
new Credentials(), clock, getCompletedTaskFromPreviousRun(), metrics,
|
||||
user, System.currentTimeMillis(), getAllAMInfos());
|
||||
public TestJob(JobId jobId, ApplicationAttemptId applicationAttemptId,
|
||||
Configuration conf, EventHandler eventHandler,
|
||||
TaskAttemptListener taskAttemptListener, Clock clock,
|
||||
OutputCommitter committer, boolean newApiCommitter, String user) {
|
||||
super(jobId, getApplicationAttemptId(applicationId, getStartCount()),
|
||||
conf, eventHandler, taskAttemptListener,
|
||||
new JobTokenSecretManager(), new Credentials(), clock,
|
||||
getCompletedTaskFromPreviousRun(), metrics, committer,
|
||||
newApiCommitter, user, System.currentTimeMillis(), getAllAMInfos());
|
||||
|
||||
// This "this leak" is okay because the retained pointer is in an
|
||||
// instance variable.
|
||||
|
|
|
|||
|
|
@ -342,10 +342,10 @@ public class TestRMContainerAllocator {
|
|||
|
||||
public FakeJob(ApplicationAttemptId appAttemptID, Configuration conf,
|
||||
int numMaps, int numReduces) {
|
||||
super(appAttemptID, conf, null, null, null, null, null, null, null, null,
|
||||
System.currentTimeMillis(), null);
|
||||
this.jobId = MRBuilderUtils
|
||||
.newJobId(appAttemptID.getApplicationId(), 0);
|
||||
super(MRBuilderUtils.newJobId(appAttemptID.getApplicationId(), 0),
|
||||
appAttemptID, conf, null, null, null, null, null, null, null, null,
|
||||
true, null, System.currentTimeMillis(), null);
|
||||
this.jobId = getID();
|
||||
this.numMaps = numMaps;
|
||||
this.numReduces = numReduces;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -18,6 +18,9 @@
|
|||
|
||||
package org.apache.hadoop.mapreduce.v2.app;
|
||||
|
||||
import java.io.File;
|
||||
import java.io.FileInputStream;
|
||||
import java.io.IOException;
|
||||
import java.util.Iterator;
|
||||
|
||||
import junit.framework.Assert;
|
||||
|
|
@ -25,10 +28,21 @@ import junit.framework.Assert;
|
|||
import org.apache.commons.logging.Log;
|
||||
import org.apache.commons.logging.LogFactory;
|
||||
import org.apache.hadoop.conf.Configuration;
|
||||
import org.apache.hadoop.fs.Path;
|
||||
import org.apache.hadoop.io.NullWritable;
|
||||
import org.apache.hadoop.io.Text;
|
||||
import org.apache.hadoop.mapreduce.MRJobConfig;
|
||||
import org.apache.hadoop.mapreduce.OutputCommitter;
|
||||
import org.apache.hadoop.mapreduce.OutputFormat;
|
||||
import org.apache.hadoop.mapreduce.RecordWriter;
|
||||
import org.apache.hadoop.mapreduce.TaskAttemptContext;
|
||||
import org.apache.hadoop.mapreduce.TypeConverter;
|
||||
import org.apache.hadoop.mapreduce.jobhistory.JobHistoryEvent;
|
||||
import org.apache.hadoop.mapreduce.jobhistory.JobHistoryEventHandler;
|
||||
import org.apache.hadoop.mapreduce.jobhistory.JobHistoryParser.AMInfo;
|
||||
import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;
|
||||
import org.apache.hadoop.mapreduce.lib.output.TextOutputFormat;
|
||||
import org.apache.hadoop.mapreduce.task.TaskAttemptContextImpl;
|
||||
import org.apache.hadoop.mapreduce.v2.api.records.JobState;
|
||||
import org.apache.hadoop.mapreduce.v2.api.records.TaskAttemptState;
|
||||
import org.apache.hadoop.mapreduce.v2.api.records.TaskState;
|
||||
|
|
@ -37,20 +51,34 @@ import org.apache.hadoop.mapreduce.v2.app.job.Task;
|
|||
import org.apache.hadoop.mapreduce.v2.app.job.TaskAttempt;
|
||||
import org.apache.hadoop.mapreduce.v2.app.job.event.TaskAttemptEvent;
|
||||
import org.apache.hadoop.mapreduce.v2.app.job.event.TaskAttemptEventType;
|
||||
import org.apache.hadoop.util.ReflectionUtils;
|
||||
import org.apache.hadoop.yarn.event.EventHandler;
|
||||
import org.junit.Test;
|
||||
|
||||
public class TestRecovery {
|
||||
|
||||
private static final Log LOG = LogFactory.getLog(TestRecovery.class);
|
||||
private static Path outputDir = new Path(new File("target",
|
||||
TestRecovery.class.getName()).getAbsolutePath() +
|
||||
Path.SEPARATOR + "out");
|
||||
private static String partFile = "part-r-00000";
|
||||
private Text key1 = new Text("key1");
|
||||
private Text key2 = new Text("key2");
|
||||
private Text val1 = new Text("val1");
|
||||
private Text val2 = new Text("val2");
|
||||
|
||||
|
||||
@Test
|
||||
public void testCrashed() throws Exception {
|
||||
|
||||
int runCount = 0;
|
||||
long am1StartTimeEst = System.currentTimeMillis();
|
||||
MRApp app = new MRAppWithHistory(2, 1, false, this.getClass().getName(), true, ++runCount);
|
||||
Configuration conf = new Configuration();
|
||||
conf.setBoolean("mapred.mapper.new-api", true);
|
||||
conf.setBoolean("mapred.reducer.new-api", true);
|
||||
conf.setBoolean(MRJobConfig.JOB_UBERTASK_ENABLE, false);
|
||||
conf.set(FileOutputFormat.OUTDIR, outputDir.toString());
|
||||
Job job = app.submit(conf);
|
||||
app.waitForState(job, JobState.RUNNING);
|
||||
long jobStartTime = job.getReport().getStartTime();
|
||||
|
|
@ -135,6 +163,9 @@ public class TestRecovery {
|
|||
app = new MRAppWithHistory(2, 1, false, this.getClass().getName(), false, ++runCount);
|
||||
conf = new Configuration();
|
||||
conf.setBoolean(MRJobConfig.MR_AM_JOB_RECOVERY_ENABLE, true);
|
||||
conf.setBoolean("mapred.mapper.new-api", true);
|
||||
conf.setBoolean("mapred.reducer.new-api", true);
|
||||
conf.set(FileOutputFormat.OUTDIR, outputDir.toString());
|
||||
conf.setBoolean(MRJobConfig.JOB_UBERTASK_ENABLE, false);
|
||||
job = app.submit(conf);
|
||||
app.waitForState(job, JobState.RUNNING);
|
||||
|
|
@ -202,6 +233,164 @@ public class TestRecovery {
|
|||
// available in the failed attempt should be available here
|
||||
}
|
||||
|
||||
@Test
|
||||
public void testOutputRecovery() throws Exception {
|
||||
int runCount = 0;
|
||||
MRApp app = new MRAppWithHistory(1, 2, false, this.getClass().getName(),
|
||||
true, ++runCount);
|
||||
Configuration conf = new Configuration();
|
||||
conf.setBoolean("mapred.mapper.new-api", true);
|
||||
conf.setBoolean("mapred.reducer.new-api", true);
|
||||
conf.setBoolean(MRJobConfig.JOB_UBERTASK_ENABLE, false);
|
||||
conf.set(FileOutputFormat.OUTDIR, outputDir.toString());
|
||||
Job job = app.submit(conf);
|
||||
app.waitForState(job, JobState.RUNNING);
|
||||
Assert.assertEquals("No of tasks not correct",
|
||||
3, job.getTasks().size());
|
||||
Iterator<Task> it = job.getTasks().values().iterator();
|
||||
Task mapTask1 = it.next();
|
||||
Task reduceTask1 = it.next();
|
||||
|
||||
// all maps must be running
|
||||
app.waitForState(mapTask1, TaskState.RUNNING);
|
||||
|
||||
TaskAttempt task1Attempt1 = mapTask1.getAttempts().values().iterator()
|
||||
.next();
|
||||
|
||||
//before sending the TA_DONE, event make sure attempt has come to
|
||||
//RUNNING state
|
||||
app.waitForState(task1Attempt1, TaskAttemptState.RUNNING);
|
||||
|
||||
//send the done signal to the map
|
||||
app.getContext().getEventHandler().handle(
|
||||
new TaskAttemptEvent(
|
||||
task1Attempt1.getID(),
|
||||
TaskAttemptEventType.TA_DONE));
|
||||
|
||||
//wait for map task to complete
|
||||
app.waitForState(mapTask1, TaskState.SUCCEEDED);
|
||||
|
||||
app.waitForState(reduceTask1, TaskState.RUNNING);
|
||||
TaskAttempt reduce1Attempt1 = reduceTask1.getAttempts().values().iterator().next();
|
||||
|
||||
// write output corresponding to reduce1
|
||||
writeOutput(reduce1Attempt1, conf);
|
||||
|
||||
//send the done signal to the 1st reduce
|
||||
app.getContext().getEventHandler().handle(
|
||||
new TaskAttemptEvent(
|
||||
reduce1Attempt1.getID(),
|
||||
TaskAttemptEventType.TA_DONE));
|
||||
|
||||
//wait for first reduce task to complete
|
||||
app.waitForState(reduceTask1, TaskState.SUCCEEDED);
|
||||
|
||||
//stop the app before the job completes.
|
||||
app.stop();
|
||||
|
||||
//rerun
|
||||
//in rerun the map will be recovered from previous run
|
||||
app = new MRAppWithHistory(1, 2, false, this.getClass().getName(), false, ++runCount);
|
||||
conf = new Configuration();
|
||||
conf.setBoolean(MRJobConfig.MR_AM_JOB_RECOVERY_ENABLE, true);
|
||||
conf.setBoolean("mapred.mapper.new-api", true);
|
||||
conf.setBoolean("mapred.reducer.new-api", true);
|
||||
conf.set(FileOutputFormat.OUTDIR, outputDir.toString());
|
||||
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();
|
||||
reduceTask1 = it.next();
|
||||
Task reduceTask2 = it.next();
|
||||
|
||||
// map will be recovered, no need to send done
|
||||
app.waitForState(mapTask1, TaskState.SUCCEEDED);
|
||||
|
||||
// first reduce will be recovered, no need to send done
|
||||
app.waitForState(reduceTask1, TaskState.SUCCEEDED);
|
||||
|
||||
app.waitForState(reduceTask2, TaskState.RUNNING);
|
||||
|
||||
TaskAttempt reduce2Attempt = reduceTask2.getAttempts().values()
|
||||
.iterator().next();
|
||||
//before sending the TA_DONE, event make sure attempt has come to
|
||||
//RUNNING state
|
||||
app.waitForState(reduce2Attempt, TaskAttemptState.RUNNING);
|
||||
|
||||
//send the done signal to the 2nd reduce task
|
||||
app.getContext().getEventHandler().handle(
|
||||
new TaskAttemptEvent(
|
||||
reduce2Attempt.getID(),
|
||||
TaskAttemptEventType.TA_DONE));
|
||||
|
||||
//wait to get it completed
|
||||
app.waitForState(reduceTask2, TaskState.SUCCEEDED);
|
||||
|
||||
app.waitForState(job, JobState.SUCCEEDED);
|
||||
app.verifyCompleted();
|
||||
validateOutput();
|
||||
}
|
||||
|
||||
private void writeOutput(TaskAttempt attempt, Configuration conf)
|
||||
throws Exception {
|
||||
TaskAttemptContext tContext = new TaskAttemptContextImpl(conf,
|
||||
TypeConverter.fromYarn(attempt.getID()));
|
||||
|
||||
TextOutputFormat<?, ?> theOutputFormat = new TextOutputFormat();
|
||||
RecordWriter theRecordWriter = theOutputFormat
|
||||
.getRecordWriter(tContext);
|
||||
|
||||
NullWritable nullWritable = NullWritable.get();
|
||||
try {
|
||||
theRecordWriter.write(key1, val1);
|
||||
theRecordWriter.write(null, nullWritable);
|
||||
theRecordWriter.write(null, val1);
|
||||
theRecordWriter.write(nullWritable, val2);
|
||||
theRecordWriter.write(key2, nullWritable);
|
||||
theRecordWriter.write(key1, null);
|
||||
theRecordWriter.write(null, null);
|
||||
theRecordWriter.write(key2, val2);
|
||||
} finally {
|
||||
theRecordWriter.close(tContext);
|
||||
}
|
||||
|
||||
OutputFormat outputFormat = ReflectionUtils.newInstance(
|
||||
tContext.getOutputFormatClass(), conf);
|
||||
OutputCommitter committer = outputFormat.getOutputCommitter(tContext);
|
||||
committer.commitTask(tContext);
|
||||
}
|
||||
|
||||
private void validateOutput() throws IOException {
|
||||
File expectedFile = new File(new Path(outputDir, partFile).toString());
|
||||
StringBuffer expectedOutput = new StringBuffer();
|
||||
expectedOutput.append(key1).append('\t').append(val1).append("\n");
|
||||
expectedOutput.append(val1).append("\n");
|
||||
expectedOutput.append(val2).append("\n");
|
||||
expectedOutput.append(key2).append("\n");
|
||||
expectedOutput.append(key1).append("\n");
|
||||
expectedOutput.append(key2).append('\t').append(val2).append("\n");
|
||||
String output = slurp(expectedFile);
|
||||
Assert.assertEquals(output, expectedOutput.toString());
|
||||
}
|
||||
|
||||
public static String slurp(File f) throws IOException {
|
||||
int len = (int) f.length();
|
||||
byte[] buf = new byte[len];
|
||||
FileInputStream in = new FileInputStream(f);
|
||||
String contents = null;
|
||||
try {
|
||||
in.read(buf, 0, len);
|
||||
contents = new String(buf, "UTF-8");
|
||||
} finally {
|
||||
in.close();
|
||||
}
|
||||
return contents;
|
||||
}
|
||||
|
||||
|
||||
class MRAppWithHistory extends MRApp {
|
||||
public MRAppWithHistory(int maps, int reduces, boolean autoComplete,
|
||||
String testName, boolean cleanOnStart, int startCount) {
|
||||
|
|
|
|||
|
|
@ -449,6 +449,8 @@ public interface MRJobConfig {
|
|||
public static final String STDOUT_LOGFILE_ENV = "STDOUT_LOGFILE_ENV";
|
||||
public static final String STDERR_LOGFILE_ENV = "STDERR_LOGFILE_ENV";
|
||||
|
||||
public static final String APPLICATION_ATTEMPT_ID_ENV = "APPLICATION_ATTEMPT_ID_ENV";
|
||||
|
||||
// This should be the directory where splits file gets localized on the node
|
||||
// running ApplicationMaster.
|
||||
public static final String JOB_SUBMIT_DIR = "jobSubmitDir";
|
||||
|
|
|
|||
|
|
@ -25,7 +25,6 @@ import org.apache.avro.Schema;
|
|||
import org.apache.avro.io.DatumWriter;
|
||||
import org.apache.avro.io.Encoder;
|
||||
import org.apache.avro.io.EncoderFactory;
|
||||
import org.apache.avro.io.JsonEncoder;
|
||||
import org.apache.avro.specific.SpecificDatumWriter;
|
||||
import org.apache.avro.util.Utf8;
|
||||
import org.apache.commons.logging.Log;
|
||||
|
|
@ -72,6 +71,7 @@ class EventWriter {
|
|||
void flush() throws IOException {
|
||||
encoder.flush();
|
||||
out.flush();
|
||||
out.hflush();
|
||||
}
|
||||
|
||||
void close() throws IOException {
|
||||
|
|
|
|||
|
|
@ -18,6 +18,8 @@
|
|||
|
||||
package org.apache.hadoop.mapreduce.lib.output;
|
||||
|
||||
import java.io.IOException;
|
||||
|
||||
import org.apache.hadoop.classification.InterfaceAudience;
|
||||
import org.apache.hadoop.classification.InterfaceStability;
|
||||
import org.apache.hadoop.mapreduce.JobContext;
|
||||
|
|
@ -56,6 +58,17 @@ public class NullOutputFormat<K, V> extends OutputFormat<K, V> {
|
|||
}
|
||||
public void setupJob(JobContext jobContext) { }
|
||||
public void setupTask(TaskAttemptContext taskContext) { }
|
||||
|
||||
@Override
|
||||
public boolean isRecoverySupported() {
|
||||
return true;
|
||||
}
|
||||
|
||||
@Override
|
||||
public void recoverTask(TaskAttemptContext taskContext)
|
||||
throws IOException {
|
||||
// Nothing to do for recovering the task.
|
||||
}
|
||||
};
|
||||
}
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue