Package org.apache.hadoop.hbase.master

Interface Summary

Interface	Description
ClusterSchema	View and edit the current cluster schema.
ClusterSchemaService	Mixes in ClusterSchema and Service
ClusterStatusPublisher.Publisher
HMaster.TableDescriptorGetter	Implement to return TableDescriptor after pre-checks
LoadBalancer	Makes decisions about the placement and movement of Regions across RegionServers.
MasterServices	A curated subset of services provided by HMaster.
MetricsAssignmentManagerSource
MetricsMasterFileSystemSource
MetricsMasterProcSource	Interface that classes that expose metrics about the master will implement.
MetricsMasterProcSourceFactory	Interface of a factory to create MetricsMasterSource when given a MetricsMasterWrapper
MetricsMasterQuotaSource	A collection of exposed metrics for space quotas from the HBase Master.
MetricsMasterQuotaSourceFactory	Interface of a factory to create MetricsMasterQuotaSource when given a MetricsMasterWrapper.
MetricsMasterSource	Interface that classes that expose metrics about the master will implement.
MetricsMasterSourceFactory	Interface of a factory to create MetricsMasterSource when given a MetricsMasterWrapper
MetricsMasterWrapper	This is the interface that will expose information to hadoop1/hadoop2 implementations of the MetricsMasterSource.
MetricsSnapshotSource
ServerListener	Get notification of server registration events.
SnapshotSentinel	Watch the current snapshot under process

Class Summary

Class	Description
ActiveMasterManager	Handles everything on master-side related to master election.
AssignmentVerificationReport	Helper class that is used by RegionPlacementMaintainer to print information for favored nodes
CatalogJanitor	A janitor for the catalog tables.
CatalogJanitor.Report	Report made by ReportMakingVisitor
CatalogJanitor.ReportMakingVisitor	Visitor we use in here in CatalogJanitor to go against hbase:meta table.
CatalogJanitor.SplitParentFirstComparator	Compare HRegionInfos in a way that has split parents sort BEFORE their daughters.
ClusterSchemaServiceImpl
ClusterStatusPublisher	Class to publish the cluster status to the client.
ClusterStatusPublisher.MulticastPublisher
ClusterStatusPublisher.MulticastPublisher.ClusterMetricsEncoder
ClusterStatusPublisher.MulticastPublisher.HBaseDatagramChannelFactory<T extends org.apache.hbase.thirdparty.io.netty.channel.Channel>
DeadServer	Class to hold dead servers list and utility querying dead server list.
DrainingServerTracker	Tracks the list of draining region servers via ZK.
ExpiredMobFileCleanerChore	The Class ExpiredMobFileCleanerChore for running cleaner regularly to remove the expired mob files.
HbckChore	Used to do the hbck checking job at master side.
HMaster	HMaster is the "master server" for HBase.
HMaster.InitializationMonitor	Protection against zombie master.
HMaster.RedirectServlet
HMasterCommandLine
HMasterCommandLine.LocalHMaster
MasterAnnotationReadingPriorityFunction	Priority function specifically for the master.
MasterCoprocessorHost	Provides the coprocessor framework and environment for master oriented operations.
MasterCoprocessorHost.MasterEnvironment	Coprocessor environment extension providing access to master related services.
MasterCoprocessorHost.MasterEnvironmentForCoreCoprocessors	Special version of MasterEnvironment that exposes MasterServices for Core Coprocessors only.
MasterDumpServlet
MasterFileSystem	This class abstracts a bunch of operations the HMaster needs to interact with the underlying file system like creating the initial layout, checking file system status, etc.
MasterMetaBootstrap	Used by the HMaster on startup to split meta logs and assign the meta table.
MasterMobCompactionThread	The mob compaction thread used in MasterRpcServices
MasterRpcServices	Implements the master RPC services.
MasterStatusServlet	The servlet responsible for rendering the index page of the master.
MasterWalManager	This class abstracts a bunch of operations the HMaster needs when splitting log files e.g.
MetaFixer	Server-side fixing of bad or inconsistent state in hbase:meta.
MetricsAssignmentManager
MetricsAssignmentManagerSourceImpl
MetricsMaster	This class is for maintaining the various master statistics and publishing them through the metrics interfaces.
MetricsMasterFileSystem
MetricsMasterFilesystemSourceImpl
MetricsMasterProcSourceFactoryImpl	Factory to create MetricsMasterProcSource when given a MetricsMasterWrapper
MetricsMasterProcSourceImpl	Hadoop2 implementation of MetricsMasterSource.
MetricsMasterQuotaSourceFactoryImpl	Factory to create MetricsMasterQuotaSource instances when given a MetricsMasterWrapper.
MetricsMasterQuotaSourceImpl	Implementation of MetricsMasterQuotaSource which writes the values passed in via the interface to the metrics backend.
MetricsMasterSourceFactoryImpl	Factory to create MetricsMasterSource when given a MetricsMasterWrapper
MetricsMasterSourceImpl	Hadoop2 implementation of MetricsMasterSource.
MetricsMasterWrapperImpl	Impl for exposing HMaster Information through JMX
MetricsSnapshot
MetricsSnapshotSourceImpl
MirroringTableStateManager	Deprecated Since 2.0.0.
MobCompactionChore	The Class MobCompactChore for running compaction regularly to merge small mob files.
RackManager	Wrapper over the rack resolution utility in Hadoop.
RegionPlacementMaintainer	A tool that is used for manipulating and viewing favored nodes information for regions.
RegionPlacementMaintainer.RandomizedMatrix	Some algorithms for solving the assignment problem may traverse workers or jobs in linear order which may result in skewing the assignments of the first jobs in the matrix toward the last workers in the matrix if the costs are uniform.
RegionPlan	Stores the plan for the move of an individual region.
RegionPlan.RegionPlanComparator
RegionServerTracker	Tracks the online region servers via ZK.
RegionState	State of a Region while undergoing transitions.
ServerManager	The ServerManager class manages info about region servers.
SnapshotOfRegionAssignmentFromMeta	Used internally for reading meta and constructing datastructures that are then queried, for things like regions to regionservers, table to regions, etc.
SplitLogManager	Distributes the task of log splitting to the available region servers.
SplitLogManager.Task	in memory state of an active task.
SplitLogManager.TaskBatch	Keeps track of the batch of tasks submitted together by a caller in splitLogDistributed().
SplitOrMergeTracker	Tracks the switch of split and merge states in ZK
SplitOrMergeTracker.SwitchStateTracker
SplitWALManager	Create SplitWALProcedure for each WAL which need to split.
SplitWALManager.SplitWorkerAssigner	help assign and release a worker for each WAL splitting task For each worker, concurrent running splitting task should be no more than maxSplitTasks If a task failed to acquire a worker, it will suspend and wait for workers available
TableNamespaceManager	This is a helper class used internally to manage the namespace metadata that is stored in TableName.NAMESPACE_TABLE_NAME.
TableStateManager	This is a helper class used to manage table states.

Enum Summary

Enum	Description
MasterRpcServices.BalanceSwitchMode
MetricsMasterSourceFactoryImpl.FactoryStorage
RegionState.State
ServerManager.ServerLiveState
SplitLogManager.ResubmitDirective
SplitLogManager.TerminationStatus

Exception Summary

Exception	Description
ClusterSchemaException
HMaster.MasterStoppedException
NoSuchProcedureException
TableStateManager.TableStateNotFoundException