com.mapr.hadoop.yarn.resourcemanager

Class RMVolumeManager

java.lang.Object

org.apache.hadoop.service.AbstractService

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

com.mapr.hadoop.yarn.resourcemanager.RMVolumeManager

All Implemented Interfaces:

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

public class RMVolumeManager
extends org.apache.hadoop.yarn.server.api.ConfigurableAuxiliaryService

Manage resource manager volume and directory creation on MapRFS.

Nested Class Summary

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

org.apache.hadoop.service.Service.STATE

Method Summary

Modifier and Type	Method and Description
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.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

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.service.AbstractService

Throws:

java.lang.Exception