org.apache.hadoop.hbase.master

Class RegionsRecoveryChore

java.lang.Object

org.apache.hadoop.hbase.ScheduledChore

org.apache.hadoop.hbase.master.RegionsRecoveryChore

All Implemented Interfaces:

Runnable

@InterfaceAudience.Private
public class RegionsRecoveryChore
extends ScheduledChore

This chore, every time it runs, will try to recover regions with high store ref count by reopening them

Field Summary

Fields

Modifier and Type	Field and Description
private static String	ERROR_REOPEN_REIONS_MSG
private HMaster	hMaster
private static org.slf4j.Logger	LOG
private static PerClientRandomNonceGenerator	NONCE_GENERATOR
private static String	REGIONS_RECOVERY_CHORE_NAME
private int	storeFileRefCountThreshold

Constructor Summary

Constructors

Constructor and Description
RegionsRecoveryChore(Stoppable stopper, org.apache.hadoop.conf.Configuration configuration, HMaster hMaster) Construct RegionsRecoveryChore with provided params

Method Summary

Modifier and Type	Method and Description
protected void	chore() The task to execute on each scheduled execution of the Chore
private Map<TableName,List<byte[]>>	getTableToRegionsByRefCount(Map<ServerName,ServerMetrics> serverMetricsMap)
private void	prepareTableToReopenRegionsMap(Map<TableName,List<byte[]>> tableToReopenRegionsMap, byte[] regionName, int regionStoreRefCount)

Methods inherited from class org.apache.hadoop.hbase.ScheduledChore

cancel, cancel, choreForTesting, cleanup, getInitialDelay, getName, getPeriod, getStopper, getTimeUnit, initialChore, isInitialChoreComplete, isScheduled, run, shutdown, shutdown, toString, triggerNow

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

REGIONS_RECOVERY_CHORE_NAME

private static final String REGIONS_RECOVERY_CHORE_NAME

See Also:

Constant Field Values

ERROR_REOPEN_REIONS_MSG

private static final String ERROR_REOPEN_REIONS_MSG

See Also:

Constant Field Values

hMaster

private final HMaster hMaster

storeFileRefCountThreshold

private final int storeFileRefCountThreshold

NONCE_GENERATOR

private static final PerClientRandomNonceGenerator NONCE_GENERATOR

Constructor Detail

RegionsRecoveryChore

RegionsRecoveryChore(Stoppable stopper,
                     org.apache.hadoop.conf.Configuration configuration,
                     HMaster hMaster)

Construct RegionsRecoveryChore with provided params

Parameters:

stopper - When Stoppable.isStopped() is true, this chore will cancel and cleanup

configuration - The configuration params to be used

hMaster - HMaster instance to initiate RegionTableRegions

Method Detail

chore

protected void chore()

Description copied from class: ScheduledChore

The task to execute on each scheduled execution of the Chore

Specified by:

chore in class ScheduledChore

getTableToRegionsByRefCount

private Map<TableName,List<byte[]>> getTableToRegionsByRefCount(Map<ServerName,ServerMetrics> serverMetricsMap)

prepareTableToReopenRegionsMap

private void prepareTableToReopenRegionsMap(Map<TableName,List<byte[]>> tableToReopenRegionsMap,
                                            byte[] regionName,
                                            int regionStoreRefCount)