org.apache.hadoop.hbase.master

Class AlwaysStandByHMaster.AlwaysStandByMasterManager

java.lang.Object

org.apache.hadoop.hbase.zookeeper.ZKListener

org.apache.hadoop.hbase.master.ActiveMasterManager

org.apache.hadoop.hbase.master.AlwaysStandByHMaster.AlwaysStandByMasterManager

Enclosing class:

AlwaysStandByHMaster

private static class AlwaysStandByHMaster.AlwaysStandByMasterManager
extends org.apache.hadoop.hbase.master.ActiveMasterManager

An implementation of ActiveMasterManager that never transitions it's master to active state. It always remains as a stand by master. With the master registry implementation (HBASE-18095) it is expected to have at least one active / standby master always running at any point in time since they serve as the gateway for client connections. With this implementation, tests can simulate the scenario of not having an active master yet the client connections to the cluster succeed.

Field Summary

Fields

Modifier and Type	Field and Description
private static org.slf4j.Logger	LOG

Fields inherited from class org.apache.hadoop.hbase.master.ActiveMasterManager

activeMasterServerName, clusterHasActiveMaster, clusterShutDown, infoPort, master, sn

Fields inherited from class org.apache.hadoop.hbase.zookeeper.ZKListener

watcher

Constructor Summary

Constructors

Constructor and Description
AlwaysStandByMasterManager(org.apache.hadoop.hbase.zookeeper.ZKWatcher watcher, org.apache.hadoop.hbase.ServerName sn, org.apache.hadoop.hbase.Server master)

Method Summary

Modifier and Type	Method and Description
(package private) boolean	blockUntilBecomingActiveMaster(int checkInterval, org.apache.hadoop.hbase.monitoring.MonitoredTask startupStatus) An implementation that never transitions to an active master.

Methods inherited from class org.apache.hadoop.hbase.master.ActiveMasterManager

getActiveMasterInfoPort, getActiveMasterServerName, getBackupMasterInfoPort, getBackupMasters, handle, hasActiveMaster, nodeChildrenChanged, nodeCreated, nodeDeleted, setInfoPort, stop

Methods inherited from class org.apache.hadoop.hbase.zookeeper.ZKListener

getWatcher, nodeDataChanged

Methods inherited from class java.lang.Object

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

Field Detail

LOG

private static final org.slf4j.Logger LOG

Constructor Detail

AlwaysStandByMasterManager

AlwaysStandByMasterManager(org.apache.hadoop.hbase.zookeeper.ZKWatcher watcher,
                           org.apache.hadoop.hbase.ServerName sn,
                           org.apache.hadoop.hbase.Server master)
                    throws InterruptedIOException

Throws:

InterruptedIOException

Method Detail

blockUntilBecomingActiveMaster

boolean blockUntilBecomingActiveMaster(int checkInterval,
                                       org.apache.hadoop.hbase.monitoring.MonitoredTask startupStatus)

An implementation that never transitions to an active master.

Overrides:

blockUntilBecomingActiveMaster in class org.apache.hadoop.hbase.master.ActiveMasterManager