Package org.apache.hadoop.yarn.server.applicationhistoryservice

Class HSVolumeManager

java.lang.Object

org.apache.hadoop.service.AbstractService

org.apache.hadoop.yarn.server.api.ConfigurableAuxiliaryService

org.apache.hadoop.yarn.server.volume.VolumeManager

org.apache.hadoop.yarn.server.applicationhistoryservice.HSVolumeManager

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable, org.apache.hadoop.service.Service

public class HSVolumeManager
extends org.apache.hadoop.yarn.server.volume.VolumeManager

Nested Class Summary

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

org.apache.hadoop.service.Service.STATE

Field Summary

Fields

Modifier and Type	Field	Description
static java.lang.String	HS_WORK_DIR

Fields inherited from class org.apache.hadoop.yarn.server.volume.VolumeManager

fs, HS_VOLUME_NAME, LOG, mountPath, newVolumePathSupportEnabled, RM_VOLUME_NAME, VOLUME_MOUNTED, VOLUME_NAME, VOLUME_PATH, volumeLogfilePath, volumeMode, yarnDir

Constructor Summary

Constructors

Constructor	Description
HSVolumeManager()

Method Summary

Modifier and Type	Method	Description
void	createVolumes(org.apache.hadoop.conf.Configuration conf)
void	serviceInit(org.apache.hadoop.conf.Configuration conf)	The volume creation is done as part of serviceInit instead of serviceStart because in the case of JobHistoryServer, there are services which try to create directories inside this volume in serviceInit.

Methods inherited from class org.apache.hadoop.yarn.server.volume.VolumeManager

copyOwnerAndPermission, copyPermissionsIfNeeded, createDir, createVolume, getVolumeInfo, isVolumeMounted, lockVolume, mountVolume, unlockVolume, unmountVolume, verifyYarnDirPermissions, waitForLockRelease, waitForYarnPathCreated

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, serviceStart, serviceStop, 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

HS_WORK_DIR

public static final java.lang.String HS_WORK_DIR

See Also:

Constant Field Values

Constructor Detail

HSVolumeManager

public HSVolumeManager()

Method Detail

serviceInit

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

The volume creation is done as part of serviceInit instead of serviceStart because in the case of JobHistoryServer, there are services which try to create directories inside this volume in serviceInit. Since serviceInit is called sequentially for all services before serviceStart, we need this behavior.

Overrides:

serviceInit in class org.apache.hadoop.yarn.server.volume.VolumeManager

Throws:

java.lang.Exception

createVolumes

public void createVolumes(org.apache.hadoop.conf.Configuration conf)
                   throws java.lang.Exception

Specified by:

createVolumes in class org.apache.hadoop.yarn.server.volume.VolumeManager

Throws:

java.lang.Exception