Package org.apache.hadoop.hbase.master

Class MasterRegionServerList

java.lang.Object

org.apache.hadoop.hbase.master.MasterRegionServerList

All Implemented Interfaces:

RegionServerList

@Private
public class MasterRegionServerList
extends Object
implements RegionServerList

MasterRegion based RegionServerList.

This is useful when we want to restart a cluster with only the data on file system, as when restarting, we need to get the previous live region servers for scheduling SCP. Before we have this class, we need to scan the WAL directory on WAL file system to find out the previous live region servers, which means we can not restart a cluster without the previous WAL file system, even if we have flushed all the data.

Please see HBASE-26245 for more details.

Field Summary

Fields

Modifier and Type	Field	Description
private final Abortable	abortable
private static final org.slf4j.Logger	LOG
private final MasterRegion	region

Constructor Summary

Constructors

Constructor	Description
MasterRegionServerList(MasterRegion region, Abortable abortable)

Method Summary

Modifier and Type	Method	Description
void	expired(ServerName sn)	Called when a region server is dead.
Set<ServerName>	getAll()	Get all live region servers.
void	started(ServerName sn)	Called when a region server join the cluster.

Methods inherited from class java.lang.Object

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

Field Details

LOG

private static final org.slf4j.Logger LOG

region

private final MasterRegion region

abortable

private final Abortable abortable

Constructor Details

MasterRegionServerList

public MasterRegionServerList(MasterRegion region,
 Abortable abortable)

Method Details

started

public void started(ServerName sn)

Description copied from interface: RegionServerList

Called when a region server join the cluster.

Specified by:

started in interface RegionServerList

expired

public void expired(ServerName sn)

Description copied from interface: RegionServerList

Called when a region server is dead.

Specified by:

expired in interface RegionServerList

getAll

public Set<ServerName> getAll()
                       throws IOException

Description copied from interface: RegionServerList

Get all live region servers.

Specified by:

getAll in interface RegionServerList

Throws:

IOException