Package org.apache.hadoop.hdfs.tools

Class NNHAServiceTarget

java.lang.Object

org.apache.hadoop.ha.HAServiceTarget

org.apache.hadoop.hdfs.tools.NNHAServiceTarget

@Private
public class NNHAServiceTarget
extends org.apache.hadoop.ha.HAServiceTarget

One of the NN NameNodes acting as the target of an administrative command (e.g. failover).

Constructor Summary

Constructors

Constructor	Description
NNHAServiceTarget(org.apache.hadoop.conf.Configuration conf, String nsId, String nnId)	Create a NNHAServiceTarget for a namenode.
NNHAServiceTarget(org.apache.hadoop.conf.Configuration conf, String nsId, String nnId, String addr, String lifelineAddr)	Create a NNHAServiceTarget for a namenode.

Method Summary

Modifier and Type	Method	Description
protected void	addFencingParameters(Map<String,String> ret)
void	checkFencingConfigured()
InetSocketAddress	getAddress()
org.apache.hadoop.ha.NodeFencer	getFencer()
InetSocketAddress	getHealthMonitorAddress()
String	getNameNodeId()
String	getNameServiceId()
InetSocketAddress	getZKFCAddress()
boolean	isAutoFailoverEnabled()
boolean	supportObserver()
String	toString()

Methods inherited from class org.apache.hadoop.ha.HAServiceTarget

getFencingParameters, getHealthMonitorProxy, getHealthMonitorProxy, getProxy, getTransitionTargetHAStatus, getZKFCProxy, setTransitionTargetHAStatus

Methods inherited from class java.lang.Object

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

Constructor Details

NNHAServiceTarget

public NNHAServiceTarget(org.apache.hadoop.conf.Configuration conf,
 String nsId,
 String nnId)

Create a NNHAServiceTarget for a namenode. Look up addresses from configuration.

Parameters:

conf - HDFS configuration.

nsId - nsId of this nn.

nnId - nnId of this nn.

NNHAServiceTarget

public NNHAServiceTarget(org.apache.hadoop.conf.Configuration conf,
 String nsId,
 String nnId,
 String addr,
 String lifelineAddr)

Create a NNHAServiceTarget for a namenode. Addresses are provided so we don't need to lookup the config.

Parameters:

conf - HDFS configuration.

nsId - nsId of this nn.

nnId - nnId of this nn.

addr - Provided service address.

lifelineAddr - Provided lifeline address.

Method Details

getAddress

public InetSocketAddress getAddress()

Specified by:

getAddress in class org.apache.hadoop.ha.HAServiceTarget

Returns:

the NN's IPC address.

getHealthMonitorAddress

public InetSocketAddress getHealthMonitorAddress()

Overrides:

getHealthMonitorAddress in class org.apache.hadoop.ha.HAServiceTarget

getZKFCAddress

public InetSocketAddress getZKFCAddress()

Specified by:

getZKFCAddress in class org.apache.hadoop.ha.HAServiceTarget

checkFencingConfigured

public void checkFencingConfigured()
                            throws org.apache.hadoop.ha.BadFencingConfigurationException

Specified by:

checkFencingConfigured in class org.apache.hadoop.ha.HAServiceTarget

Throws:

org.apache.hadoop.ha.BadFencingConfigurationException

getFencer

public org.apache.hadoop.ha.NodeFencer getFencer()

Specified by:

getFencer in class org.apache.hadoop.ha.HAServiceTarget

toString

public String toString()

Overrides:

toString in class Object

getNameServiceId

public String getNameServiceId()

getNameNodeId

public String getNameNodeId()

addFencingParameters

protected void addFencingParameters(Map<String,String> ret)

Overrides:

addFencingParameters in class org.apache.hadoop.ha.HAServiceTarget

isAutoFailoverEnabled

public boolean isAutoFailoverEnabled()

Overrides:

isAutoFailoverEnabled in class org.apache.hadoop.ha.HAServiceTarget

supportObserver

public boolean supportObserver()

Overrides:

supportObserver in class org.apache.hadoop.ha.HAServiceTarget