org.apache.hadoop.hbase.master

Class DeadServer

java.lang.Object

org.apache.hadoop.hbase.master.DeadServer

@InterfaceAudience.Private
public class DeadServer
extends Object

Class to hold dead servers list and utility querying dead server list. Servers are added when they expire or when we find them in filesystem on startup. When a server crash procedure is queued, it will populate the processing list and then remove the server from processing list when done. Servers are removed from dead server list when a new instance is started over the old on same hostname and port or when new Master comes online tidying up after all initialization. Processing list and deadserver list are not tied together (you don't have to be in deadservers list to be processing and vice versa).

Constructor Summary

Constructors

Constructor and Description
DeadServer()

Method Summary

Modifier and Type	Method and Description
Set<ServerName>	copyServerNames()
void	finish(ServerName sn) Complete processing for this dead server.
Date	getTimeOfDeath(ServerName deadServerName) Get the time when a server died
boolean	isDeadServer(ServerName serverName)
void	processing(ServerName sn) Add sn< to set of processing deadservers.
boolean	removeDeadServer(ServerName deadServerName) Called from rpc by operator cleaning up deadserver list.
int	size()
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

DeadServer

public DeadServer()

Method Detail

isDeadServer

public boolean isDeadServer(ServerName serverName)

Parameters:

serverName - server name.

Returns:

true if this server is on the dead servers list false otherwise

copyServerNames

public Set<ServerName> copyServerNames()

processing

public void processing(ServerName sn)

Add sn< to set of processing deadservers.

See Also:

finish(ServerName)

finish

public void finish(ServerName sn)

Complete processing for this dead server.

Parameters:

sn - ServerName for the dead server.

See Also:

processing(ServerName)

size

public int size()

toString

public String toString()

Overrides:

toString in class Object

getTimeOfDeath

public Date getTimeOfDeath(ServerName deadServerName)

Get the time when a server died

Parameters:

deadServerName - the dead server name

Returns:

the date when the server died

removeDeadServer

public boolean removeDeadServer(ServerName deadServerName)

Called from rpc by operator cleaning up deadserver list.

Parameters:

deadServerName - the dead server name

Returns:

true if this server was removed