org.apache.hadoop.mapreduce.v2.hs

Class JobHistoryServer

java.lang.Object

org.apache.hadoop.service.AbstractService

org.apache.hadoop.service.CompositeService

org.apache.hadoop.mapreduce.v2.hs.JobHistoryServer

All Implemented Interfaces:

Closeable, AutoCloseable, Service

public class JobHistoryServer
extends CompositeService

JobHistoryServer is responsible for servicing all job history related requests from client.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.service.CompositeService

CompositeService.CompositeServiceShutdownHook

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

Service.STATE

Field Summary

Fields

Modifier and Type	Field and Description
static long	historyServerTimeStamp
static int	SHUTDOWN_HOOK_PRIORITY Priority of the JobHistoryServer shutdown hook.

Fields inherited from class org.apache.hadoop.service.CompositeService

STOP_ONLY_STARTED_SERVICES

Constructor Summary

Constructors

Constructor and Description
JobHistoryServer()

Method Summary

Methods

Modifier and Type	Method and Description
protected JHSDelegationTokenSecretManager	createJHSSecretManager(Configuration conf)
protected void	doSecureLogin(Configuration conf)
HistoryClientService	getClientService()
static void	main(String[] args)
protected void	serviceInit(Configuration conf) All initialization code needed by a service.
protected void	serviceStart() Actions called during the INITED to STARTED transition.
protected void	serviceStop() Actions called during the transition to the STOPPED state.

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

addIfService, addService, getServices, removeService

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

SHUTDOWN_HOOK_PRIORITY

public static final int SHUTDOWN_HOOK_PRIORITY

Priority of the JobHistoryServer shutdown hook.

See Also:

Constant Field Values

historyServerTimeStamp

public static final long historyServerTimeStamp

Constructor Detail

JobHistoryServer

public JobHistoryServer()

Method Detail

serviceInit

protected void serviceInit(Configuration conf)
                    throws Exception

Description copied from class: AbstractService

All initialization code needed by a service. This method will only ever be called once during the lifecycle of a specific service instance. Implementations do not need to be synchronized as the logic in AbstractService.init(Configuration) prevents re-entrancy. The base implementation checks to see if the subclass has created a new configuration instance, and if so, updates the base class value

Overrides:

serviceInit in class CompositeService

Parameters:

conf - configuration

Throws:

Exception - on a failure -these will be caught, possibly wrapped, and wil; trigger a service stop

createJHSSecretManager

protected JHSDelegationTokenSecretManager createJHSSecretManager(Configuration conf)

doSecureLogin

protected void doSecureLogin(Configuration conf)
                      throws IOException

Throws:

IOException

serviceStart

protected void serviceStart()
                     throws Exception

Description copied from class: AbstractService

Actions called during the INITED to STARTED transition. This method will only ever be called once during the lifecycle of a specific service instance. Implementations do not need to be synchronized as the logic in AbstractService.start() prevents re-entrancy.

Overrides:

serviceStart in class CompositeService

Throws:

Exception - if needed -these will be caught, wrapped, and trigger a service stop

serviceStop

protected void serviceStop()
                    throws Exception

Description copied from class: AbstractService

Actions called during the transition to the STOPPED state. This method will only ever be called once during the lifecycle of a specific service instance. Implementations do not need to be synchronized as the logic in AbstractService.stop() prevents re-entrancy. Implementations MUST write this to be robust against failures, including checks for null references -and for the first failure to not stop other attempts to shut down parts of the service.

Overrides:

serviceStop in class CompositeService

Throws:

Exception - if needed -these will be caught and logged.

getClientService

@InterfaceAudience.Private
public HistoryClientService getClientService()

main

public static void main(String[] args)