org.apache.tez.dag.history.recovery

Class RecoveryService

java.lang.Object

org.apache.hadoop.service.AbstractService

org.apache.tez.dag.history.recovery.RecoveryService

All Implemented Interfaces:

Closeable, AutoCloseable, org.apache.hadoop.service.Service

public class RecoveryService
extends org.apache.hadoop.service.AbstractService

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	RecoveryService.RecoveryStream

Nested classes/interfaces inherited from interface org.apache.hadoop.service.Service

org.apache.hadoop.service.Service.STATE

Field Summary

Fields

Modifier and Type	Field and Description
protected AppContext	appContext
Thread	eventHandlingThread
Map<org.apache.tez.dag.records.TezDAGID,RecoveryService.RecoveryStream>	outputStreamMap
static String	RECOVERY_FATAL_OCCURRED_DIR
org.apache.hadoop.fs.FSDataOutputStream	summaryStream
static String	TEZ_TEST_RECOVERY_DRAIN_EVENTS_WHEN_STOPPED whether to handle remaining event in the eventqueue when AM is stopped
static boolean	TEZ_TEST_RECOVERY_DRAIN_EVENTS_WHEN_STOPPED_DEFAULT by default handle remaining event when AM is stopped.

Constructor Summary

Constructors

Constructor and Description
RecoveryService(AppContext appContext)

Method Summary

Modifier and Type	Method and Description
void	await()
void	handle(DAGHistoryEvent event)
protected void	handleRecoveryEvent(DAGHistoryEvent event)
protected void	handleSummaryEvent(org.apache.tez.dag.records.TezDAGID dagID, HistoryEventType eventType, SummaryEvent summaryEvent)
boolean	hasRecoveryFailed()
void	serviceInit(org.apache.hadoop.conf.Configuration conf)
void	serviceStart()
void	serviceStop()
void	setStopped(boolean stopped)

Methods inherited from class org.apache.hadoop.service.AbstractService

close, getBlockers, getConfig, getFailureCause, getFailureState, getLifecycleHistory, getName, getServiceState, getStartTime, init, isInState, noteFailure, putBlocker, registerGlobalListener, registerServiceListener, removeBlocker, setConfig, start, stop, toString, unregisterGlobalListener, unregisterServiceListener, waitForServiceToStop

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

appContext

protected final AppContext appContext

RECOVERY_FATAL_OCCURRED_DIR

public static final String RECOVERY_FATAL_OCCURRED_DIR

See Also:

Constant Field Values

TEZ_TEST_RECOVERY_DRAIN_EVENTS_WHEN_STOPPED

public static final String TEZ_TEST_RECOVERY_DRAIN_EVENTS_WHEN_STOPPED

whether to handle remaining event in the eventqueue when AM is stopped

See Also:

Constant Field Values

TEZ_TEST_RECOVERY_DRAIN_EVENTS_WHEN_STOPPED_DEFAULT

public static final boolean TEZ_TEST_RECOVERY_DRAIN_EVENTS_WHEN_STOPPED_DEFAULT

by default handle remaining event when AM is stopped. This should be helpful for recovery

See Also:

Constant Field Values

eventHandlingThread

public Thread eventHandlingThread

outputStreamMap

public Map<org.apache.tez.dag.records.TezDAGID,RecoveryService.RecoveryStream> outputStreamMap

summaryStream

public org.apache.hadoop.fs.FSDataOutputStream summaryStream

Constructor Detail

RecoveryService

public RecoveryService(AppContext appContext)

Method Detail

serviceInit

public void serviceInit(org.apache.hadoop.conf.Configuration conf)
                 throws Exception

Overrides:

serviceInit in class org.apache.hadoop.service.AbstractService

Throws:

Exception

serviceStart

public void serviceStart()

Overrides:

serviceStart in class org.apache.hadoop.service.AbstractService

serviceStop

public void serviceStop()
                 throws Exception

Overrides:

serviceStop in class org.apache.hadoop.service.AbstractService

Throws:

Exception

handle

public void handle(DAGHistoryEvent event)
            throws IOException

Throws:

IOException

handleSummaryEvent

protected void handleSummaryEvent(org.apache.tez.dag.records.TezDAGID dagID,
                                  HistoryEventType eventType,
                                  SummaryEvent summaryEvent)
                           throws IOException

Throws:

IOException

handleRecoveryEvent

protected void handleRecoveryEvent(DAGHistoryEvent event)
                            throws IOException

Throws:

IOException

hasRecoveryFailed

public boolean hasRecoveryFailed()

await

public void await()

setStopped

public void setStopped(boolean stopped)