org.apache.hadoop.hbase.regionserver.handler

Class OpenRegionHandler

java.lang.Object

org.apache.hadoop.hbase.executor.EventHandler

org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler

All Implemented Interfaces:

Comparable<Runnable>, Runnable

Direct Known Subclasses:

OpenMetaHandler, OpenPriorityRegionHandler

@InterfaceAudience.Private
public class OpenRegionHandler
extends EventHandler

Handles opening of a region on a region server.

This is executed after receiving an OPEN RPC from the master or client.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
(package private) static class	OpenRegionHandler.PostOpenDeployTasksThread Thread to run region post open tasks.

Field Summary

Fields

Modifier and Type	Field and Description
private TableDescriptor	htd
private static org.slf4j.Logger	LOG
private long	masterSystemTime
private RegionInfo	regionInfo
protected RegionServerServices	rsServices

Fields inherited from class org.apache.hadoop.hbase.executor.EventHandler

eventType, seqids, server, waitingTimeForEvents

Constructor Summary

Constructors

Modifier	Constructor and Description
	OpenRegionHandler(Server server, RegionServerServices rsServices, RegionInfo regionInfo, TableDescriptor htd, long masterSystemTime)
protected	OpenRegionHandler(Server server, RegionServerServices rsServices, RegionInfo regionInfo, TableDescriptor htd, long masterSystemTime, EventType eventType)

Method Summary

Modifier and Type	Method and Description
(package private) void	cleanupFailedOpen(HRegion region)
private void	doCleanUpOnFailedOpen(HRegion region)
RegionInfo	getRegionInfo()
private boolean	isRegionStillOpening()
private static boolean	isRegionStillOpening(RegionInfo regionInfo, RegionServerServices rsServices)
(package private) HRegion	openRegion()
void	process() This method is the main processing loop to be implemented by the various subclasses.
(package private) boolean	updateMeta(HRegion r, long masterSystemTime) Update ZK or META.

Methods inherited from class org.apache.hadoop.hbase.executor.EventHandler

compareTo, getEventType, getInformativeName, getPriority, getSeqid, handleException, prepare, run, toString

Methods inherited from class java.lang.Object

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

Field Detail

LOG

private static final org.slf4j.Logger LOG

rsServices

protected final RegionServerServices rsServices

regionInfo

private final RegionInfo regionInfo

htd

private final TableDescriptor htd

masterSystemTime

private final long masterSystemTime

Constructor Detail

OpenRegionHandler

public OpenRegionHandler(Server server,
                         RegionServerServices rsServices,
                         RegionInfo regionInfo,
                         TableDescriptor htd,
                         long masterSystemTime)

OpenRegionHandler

protected OpenRegionHandler(Server server,
                            RegionServerServices rsServices,
                            RegionInfo regionInfo,
                            TableDescriptor htd,
                            long masterSystemTime,
                            EventType eventType)

Method Detail

getRegionInfo

public RegionInfo getRegionInfo()

process

public void process()
             throws IOException

Description copied from class: EventHandler

This method is the main processing loop to be implemented by the various subclasses.

Specified by:

process in class EventHandler

Throws:

IOException

doCleanUpOnFailedOpen

private void doCleanUpOnFailedOpen(HRegion region)
                            throws IOException

Throws:

IOException

updateMeta

boolean updateMeta(HRegion r,
                   long masterSystemTime)

Update ZK or META. This can take a while if for example the hbase:meta is not available -- if server hosting hbase:meta crashed and we are waiting on it to come back -- so run in a thread and keep updating znode state meantime so master doesn't timeout our region-in-transition. Caller must cleanup region if this fails.

openRegion

HRegion openRegion()

Returns:

Instance of HRegion if successful open else null.

cleanupFailedOpen

void cleanupFailedOpen(HRegion region)
                throws IOException

Throws:

IOException

isRegionStillOpening

private static boolean isRegionStillOpening(RegionInfo regionInfo,
                                            RegionServerServices rsServices)

isRegionStillOpening

private boolean isRegionStillOpening()