org.apache.hadoop.hdfs.server.blockmanagement

Class DatanodeAdminDefaultMonitor

java.lang.Object

org.apache.hadoop.hdfs.server.blockmanagement.DatanodeAdminMonitorBase

org.apache.hadoop.hdfs.server.blockmanagement.DatanodeAdminDefaultMonitor

All Implemented Interfaces:

Runnable, org.apache.hadoop.conf.Configurable, DatanodeAdminMonitorInterface

public class DatanodeAdminDefaultMonitor
extends DatanodeAdminMonitorBase
implements DatanodeAdminMonitorInterface

Checks to see if datanodes have finished DECOMMISSION_INPROGRESS or ENTERING_MAINTENANCE state.

Since this is done while holding the namesystem lock, the amount of work per monitor tick is limited.

Field Summary

Fields inherited from class org.apache.hadoop.hdfs.server.blockmanagement.DatanodeAdminMonitorBase

blockManager, conf, dnAdmin, maxConcurrentTrackedNodes, namesystem, pendingNodes

Method Summary

Modifier and Type	Method and Description
int	getNumNodesChecked()
int	getTrackedNodeCount()
protected void	processConf() Abstract method which must be implemented by the sub-classes to process set various instance variables from the Configuration passed at object creation time.
void	run()
void	stopTrackingNode(org.apache.hadoop.hdfs.server.blockmanagement.DatanodeDescriptor dn)

Methods inherited from class org.apache.hadoop.hdfs.server.blockmanagement.DatanodeAdminMonitorBase

getConf, getPendingNodeCount, getPendingNodes, setBlockManager, setConf, setDatanodeAdminManager, setNameSystem, startTrackingNode

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.hadoop.hdfs.server.blockmanagement.DatanodeAdminMonitorInterface

getPendingNodeCount, getPendingNodes, setBlockManager, setDatanodeAdminManager, setNameSystem, startTrackingNode

Method Detail

processConf

protected void processConf()

Description copied from class: DatanodeAdminMonitorBase

Abstract method which must be implemented by the sub-classes to process set various instance variables from the Configuration passed at object creation time.

Specified by:

processConf in class DatanodeAdminMonitorBase

stopTrackingNode

public void stopTrackingNode(org.apache.hadoop.hdfs.server.blockmanagement.DatanodeDescriptor dn)

Specified by:

stopTrackingNode in interface DatanodeAdminMonitorInterface

getTrackedNodeCount

public int getTrackedNodeCount()

Specified by:

getTrackedNodeCount in interface DatanodeAdminMonitorInterface

getNumNodesChecked

public int getNumNodesChecked()

Specified by:

getNumNodesChecked in interface DatanodeAdminMonitorInterface

run

public void run()

Specified by:

run in interface Runnable