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.
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
CachedClusterId	Caches the cluster ID of the cluster.
ClusterStatusPublisher	Class to publish the cluster status to the client.
ClusterStatusPublisher.MulticastPublisher
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.
HMasterCommandLine
HMasterCommandLine.LocalHMaster
MasterAnnotationReadingPriorityFunction	Priority function specifically for the master.
MasterCoprocessorHost	Provides the coprocessor framework and environment for master oriented operations.
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.
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.
MetaRegionLocationCache	A cache of meta region location metadata.
MetricsAssignmentManager
MetricsMaster	This class is for maintaining the various master statistics and publishing them through the metrics interfaces.
MetricsMasterFileSystem
MetricsMasterWrapperImpl	Impl for exposing HMaster Information through JMX
MetricsSnapshot
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.
RegionsRecoveryChore	This chore, every time it runs, will try to recover regions with high store ref count by reopening them
RegionsRecoveryConfigManager	Config manager for RegionsRecovery Chore - Dynamically reload config and update chore accordingly
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	Deprecated since 2.4.0 and in 3.0.0, to be removed in 4.0.0, replaced by procedure-based distributed WAL splitter, see SplitWALManager.
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
SplitWALManager	Create SplitWALProcedure for each WAL which need to split.
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
ServerManager.ServerLiveState
SplitLogManager.ResubmitDirective
SplitLogManager.TerminationStatus

Exception Summary

Exception	Description
NoSuchProcedureException