HMaster (Apache HBase - Server 3.0.0-alpha-3 API)

java.lang.Object
- java.lang.Thread
- - org.apache.hadoop.hbase.HBaseServerBase<MasterRpcServices>
  - - org.apache.hadoop.hbase.master.HMaster

All Implemented Interfaces:

Runnable, Abortable, ConnectionRegistryEndpoint, ConfigurationObserver, MasterServices, Server, Stoppable

Direct Known Subclasses:

HMasterCommandLine.LocalHMaster
```
@InterfaceAudience.LimitedPrivate(value="Tools")
public class HMaster
extends HBaseServerBase<MasterRpcServices>
implements MasterServices
```
HMaster is the "master server" for HBase. An HBase cluster has one active master. If many masters are started, all compete. Whichever wins goes on to run the cluster. All others park themselves in their constructor until master or cluster shutdown or until the active master loses its lease in zookeeper. Thereafter, all running master jostle to take over master role.
The Master can be asked shutdown the cluster. See shutdown(). In this case it will tell all regionservers to go down and then wait on them all reporting in that they are down. This master will then shut itself down.
You can also shutdown just this master. Call stopMaster().

See Also:

Watcher

Nested Class Summary

Nested Classes
Modifier and Type Class and Description

protected static interface HMaster.TableDescriptorGetter
Implement to return TableDescriptor after pre-checks
- Nested classes/interfaces inherited from class java.lang.Thread
  Thread.State, Thread.UncaughtExceptionHandler

Nested Classes
Modifier and Type	Class and Description
`protected static interface`	`HMaster.TableDescriptorGetter` Implement to return TableDescriptor after pre-checks

Field Summary

Fields
Modifier and Type	Field and Description
`static int`	`DEFAULT_HBASE_MASTER_CLEANER_INTERVAL`
`static int`	`DEFAULT_HBASE_MASTER_WAIT_ON_SERVICE_IN_SECONDS`
`static String`	`HBASE_MASTER_CLEANER_INTERVAL`
`static String`	`HBASE_MASTER_WAIT_ON_SERVICE_IN_SECONDS`
`static String`	`MASTER`
`static String`	`WARMUP_BEFORE_MOVE`

Fields inherited from class org.apache.hadoop.hbase.HBaseServerBase
abortRequested, asyncClusterConnection, choreService, clusterStatusTracker, conf, configurationManager, csm, dataFs, dataRootDir, eventLoopGroupConfig, executorService, infoServer, metaRegionLocationCache, msgInterval, namedQueueRecorder, rpcServices, serverName, sleeper, startcode, stopped, tableDescriptors, userProvider, useThisHostnameInstead, walFs, walRootDir, zooKeeper

Fields inherited from class java.lang.Thread
MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Constructor Summary

Constructors
Constructor and Description

HMaster(org.apache.hadoop.conf.Configuration conf)
Initializes the HMaster.

Constructors
Constructor and Description
`HMaster(org.apache.hadoop.conf.Configuration conf)` Initializes the HMaster.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`void`	`abort(String reason, Throwable cause)`
`boolean`	`abortProcedure(long procId, boolean mayInterruptIfRunning)` Abort a procedure.
`long`	`addColumn(TableName tableName, ColumnFamilyDescriptor column, long nonceGroup, long nonce)` Add a new column to an existing table
`long`	`addReplicationPeer(String peerId, ReplicationPeerConfig peerConfig, boolean enabled)` Add a new replication peer for replicating data to slave cluster
`BalanceResponse`	`balance()`
`BalanceResponse`	`balance(BalanceRequest request)`
`BalanceResponse`	`balanceOrUpdateMetrics()` Trigger a normal balance, see `balance()` .
`boolean`	`balanceSwitch(boolean b)`
`protected boolean`	`cacheTableDescriptor()`
`protected boolean`	`canCreateBaseZNode()`
`protected boolean`	`canUpdateTableDescriptor()`
`void`	`checkIfShouldMoveSystemRegionAsync()` Called when a new RegionServer is added to the cluster.
`protected void`	`checkServiceStarted()`
`void`	`checkTableModifiable(TableName tableName)` Check table is modifiable; i.e.
`protected boolean`	`clusterMode()`
`protected void`	`configureInfoServer(InfoServer infoServer)`
`static HMaster`	`constructMaster(Class<? extends HMaster> masterClass, org.apache.hadoop.conf.Configuration conf)` Utility for constructing an instance of the passed HMaster class.
`protected ActiveMasterManager`	`createActiveMasterManager(ZKWatcher zk, ServerName sn, Server server)` Protected to have custom implementations in tests override the default ActiveMaster implementation.
`protected AssignmentManager`	`createAssignmentManager(MasterServices master, MasterRegion masterRegion)`
`protected NamedQueueRecorder`	`createNamedQueueRecord()`
`protected MasterRpcServices`	`createRpcServices()`
`protected ServerManager`	`createServerManager(MasterServices master, RegionServerList storage)` Create a `ServerManager` instance.
`long`	`createSystemTable(TableDescriptor tableDescriptor)` Create a system table using the given table definition.
`long`	`createTable(TableDescriptor tableDescriptor, byte[][] splitKeys, long nonceGroup, long nonce)` Create a table using the given table definition.
`void`	`decommissionRegionServers(List<ServerName> servers, boolean offload)` Mark region server(s) as decommissioned (previously called 'draining') to prevent additional regions from getting assigned to them.
`static void`	`decorateMasterConfiguration(org.apache.hadoop.conf.Configuration conf)` This method modifies the master's configuration in order to inject replication-related features
`long`	`deleteColumn(TableName tableName, byte[] columnName, long nonceGroup, long nonce)` Delete a column from an existing table
`long`	`deleteTable(TableName tableName, long nonceGroup, long nonce)` Delete a table
`long`	`disableReplicationPeer(String peerId)` Stop the replication stream to the specified peer
`long`	`disableTable(TableName tableName, long nonceGroup, long nonce)` Disable an existing table
`long`	`enableReplicationPeer(String peerId)` Restart the replication stream to the specified peer
`long`	`enableTable(TableName tableName, long nonceGroup, long nonce)` Enable an existing table
`List<RegionPlan>`	`executeRegionPlansWithThrottling(List<RegionPlan> plans)` Execute region plans with throttling
`void`	`flushMasterStore()` Flush master local region
`Optional<ServerName>`	`getActiveMaster()` Get active master address.
`int`	`getActiveMasterInfoPort()`
`ActiveMasterManager`	`getActiveMasterManager()`
`AssignmentManager`	`getAssignmentManager()`
`double`	`getAverageLoad()` Compute the average load across all region servers.
`int`	`getBackupMasterInfoPort(ServerName sn)`
`List<ServerName>`	`getBackupMasters()` Get backup masters address.
`Iterator<ServerName>`	`getBootstrapNodes()` Get a iterator of the available bootstrap nodes.
`CatalogJanitor`	`getCatalogJanitor()`
`String`	`getClientIdAuditPrefix()`
`String`	`getClusterId()` Get cluster id.
`ClusterMetrics`	`getClusterMetrics()`
`ClusterMetrics`	`getClusterMetrics(EnumSet<ClusterMetrics.Option> options)`
`ClusterMetrics`	`getClusterMetricsWithoutCoprocessor()`
`ClusterMetrics`	`getClusterMetricsWithoutCoprocessor(EnumSet<ClusterMetrics.Option> options)`
`ClusterSchema`	`getClusterSchema()`
`CompactionState`	`getCompactionState(TableName tableName)` Get the compaction state of the table
`ConfigurationManager`	`getConfigurationManager()`
`protected Class<? extends javax.servlet.http.HttpServlet>`	`getDumpServlet()`
`FavoredNodesManager`	`getFavoredNodesManager()`
`HbckChore`	`getHbckChore()`
`HFileCleaner`	`getHFileCleaner()`
`List<HFileCleaner>`	`getHFileCleaners()`
`ProcedureEvent<?>`	`getInitializedEvent()`
`long`	`getLastMajorCompactionTimestamp(TableName table)`
`long`	`getLastMajorCompactionTimestampForRegion(byte[] regionName)` n * @return the timestamp of the last successful major compaction for the passed region or 0 if no HFile resulting from a major compaction exists n
`Collection<ServerName>`	`getLiveRegionServers()`
`RSGroupBasedLoadBalancer`	`getLoadBalancer()`
`String`	`getLoadBalancerClassName()` Fetch the configured `LoadBalancer` class name.
`static String`	`getLoadedCoprocessors()` The set of loaded coprocessors is stored in a static set.
`LockManager`	`getLockManager()`
`List<LockedResource>`	`getLocks()` Get locks
`LogCleaner`	`getLogCleaner()`
`long`	`getMasterActiveTime()`
`MasterCoprocessorHost`	`getMasterCoprocessorHost()`
`String[]`	`getMasterCoprocessors()`
`MasterFileSystem`	`getMasterFileSystem()`
`long`	`getMasterFinishedInitializationTime()`
`MetricsMaster`	`getMasterMetrics()`
`ProcedureExecutor<MasterProcedureEnv>`	`getMasterProcedureExecutor()`
`MasterProcedureManagerHost`	`getMasterProcedureManagerHost()`
`MasterQuotaManager`	`getMasterQuotaManager()`
`MasterRegion`	`getMasterRegion()`
`MasterRpcServices`	`getMasterRpcServices()`
`long`	`getMasterStartTime()`
`MasterWalManager`	`getMasterWalManager()`
`List<HRegionLocation>`	`getMetaLocations()` Get the location of meta regions.
`MetaLocationSyncer`	`getMetaLocationSyncer()` Get the meta location syncer.
`org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.GetRegionInfoResponse.CompactionState`	`getMobCompactionState(TableName tableName)` Gets the mob file compaction state for a specific table.
`int`	`getNumWALFiles()`
`List<Procedure<?>>`	`getProcedures()` Get procedures
`ProcedureStore`	`getProcedureStore()`
`protected String`	`getProcessName()`
`QuotaObserverChore`	`getQuotaObserverChore()`
`RegionNormalizerManager`	`getRegionNormalizerManager()`
`MemoryBoundedLogMessageBuffer`	`getRegionServerFatalLogBuffer()`
`int`	`getRegionServerInfoPort(ServerName sn)`
`String`	`getRegionServerVersion(ServerName sn)`
`HashMap<String,List<Pair<ServerName,ReplicationLoadSource>>>`	`getReplicationLoad(ServerName[] serverNames)`
`ReplicationPeerConfig`	`getReplicationPeerConfig(String peerId)` Returns the configured ReplicationPeerConfig for the specified peer
`ReplicationPeerManager`	`getReplicationPeerManager()` Returns the `ReplicationPeerManager`.
`RSGroupInfoManager`	`getRSGroupInfoManager()`
`ServerManager`	`getServerManager()`
`ServerName`	`getServerName()`
`SnapshotManager`	`getSnapshotManager()`
`SnapshotQuotaObserverChore`	`getSnapshotQuotaObserverChore()`
`SpaceQuotaSnapshotNotifier`	`getSpaceQuotaSnapshotNotifier()`
`SplitOrMergeTracker`	`getSplitOrMergeTracker()`
`SplitWALManager`	`getSplitWALManager()`
`SyncReplicationReplayWALManager`	`getSyncReplicationReplayWALManager()` Returns the `SyncReplicationReplayWALManager`.
`TableStateManager`	`getTableStateManager()`
`protected String`	`getUseThisHostnameInstead(org.apache.hadoop.conf.Configuration conf)`
`protected void`	`initClusterSchemaService()`
`boolean`	`isActiveMaster()` Report whether this master is currently the active master or not.
`boolean`	`isBalancerOn()` Queries the state of the `LoadBalancerTracker`.
`boolean`	`isCatalogJanitorEnabled()`
`boolean`	`isInitialized()` Report whether this master has completed with its initialization and is ready.
`boolean`	`isInMaintenanceMode()` Report whether this master is in maintenance mode.
`boolean`	`isNormalizerOn()` Queries the state of the `RegionNormalizerTracker`.
`boolean`	`isOnline()` Report whether this master is started This method is used for testing.
`boolean`	`isSplitOrMergeEnabled(MasterSwitchType switchType)` Queries the state of the `SplitOrMergeTracker`.
`List<ServerName>`	`listDecommissionedRegionServers()` List region servers marked as decommissioned (previously called 'draining') to not get regions assigned to them.
`List<String>`	`listNamespaces()` List namespace names
`List<ReplicationPeerDescription>`	`listReplicationPeers(String regex)` Return a list of replication peers.
`List<TableDescriptor>`	`listTableDescriptors(String namespace, String regex, List<TableName> tableNameList, boolean includeSysTables)` Returns the list of table descriptors that match the specified request
`List<TableDescriptor>`	`listTableDescriptorsByNamespace(String name)` Get list of table descriptors by namespace
`List<TableName>`	`listTableNames(String namespace, String regex, boolean includeSysTables)` Returns the list of table names that match the specified request
`List<TableName>`	`listTableNamesByNamespace(String name)` Get list of table names by namespace
`protected void`	`login(UserProvider user, String host)` For compatibility, if failed with regionserver credentials, try the master one
`static void`	`main(String[] args)`
`long`	`mergeRegions(RegionInfo[] regionsToMerge, boolean forcible, long ng, long nonce)` Merge regions in a table.
`long`	`modifyColumn(TableName tableName, ColumnFamilyDescriptor descriptor, long nonceGroup, long nonce)` Modify the column descriptor of an existing column in an existing table
`long`	`modifyColumnStoreFileTracker(TableName tableName, byte[] family, String dstSFT, long nonceGroup, long nonce)` Modify the store file tracker of an existing column in an existing table
`long`	`modifyTable(TableName tableName, TableDescriptor newDescriptor, long nonceGroup, long nonce)` Modify the descriptor of an existing table
`long`	`modifyTableStoreFileTracker(TableName tableName, String dstSFT, long nonceGroup, long nonce)` Modify the store file tracker of an existing table
`void`	`move(byte[] encodedRegionName, byte[] destServerName)`
`boolean`	`normalizeRegions(NormalizeTableFilterParams ntfp, boolean isHighPriority)` Perform normalization of cluster.
`void`	`onConfigurationChange(org.apache.hadoop.conf.Configuration newConf)`
`void`	`recommissionRegionServer(ServerName server, List<byte[]> encodedRegionNames)` Remove decommission marker (previously called 'draining') from a region server to allow regions assignments.
`boolean`	`registerService(org.apache.hbase.thirdparty.com.google.protobuf.Service instance)` Registers a new protocol buffer `Service` subclass as a master coprocessor endpoint.
`void`	`remoteProcedureCompleted(long procId)`
`void`	`remoteProcedureFailed(long procId, RemoteProcedureException error)`
`long`	`removeReplicationPeer(String peerId)` Removes a peer and stops the replication
`void`	`reportMobCompactionEnd(TableName tableName)`
`void`	`reportMobCompactionStart(TableName tableName)`
`long`	`restoreSnapshot(org.apache.hadoop.hbase.shaded.protobuf.generated.SnapshotProtos.SnapshotDescription snapshotDesc, long nonceGroup, long nonce, boolean restoreAcl, String customSFT)`
`void`	`run()`
`void`	`runReplicationBarrierCleaner()` Run the ReplicationBarrierChore.
`void`	`setCatalogJanitorEnabled(boolean b)` Switch for the background CatalogJanitor thread.
`void`	`setInitialized(boolean isInitialized)`
`void`	`shutdown()` Shutdown the cluster.
`boolean`	`skipRegionManagementAction(String action)` Checks master state before initiating action over region topology.
`long`	`splitRegion(RegionInfo regionInfo, byte[] splitRow, long nonceGroup, long nonce)` Split a region.
`protected void`	`startProcedureExecutor()`
`void`	`stop(String msg)`
`protected void`	`stopChores()`
`void`	`stopMaster()`
`protected void`	`stopServiceThreads()`
`long`	`transitReplicationPeerSyncReplicationState(String peerId, SyncReplicationState state)` Set current cluster state for a synchronous replication peer.
`long`	`truncateTable(TableName tableName, boolean preserveSplits, long nonceGroup, long nonce)` Truncate a table
`void`	`updateConfigurationForQuotasObserver(org.apache.hadoop.conf.Configuration conf)` Adds the `MasterQuotasObserver` to the list of configured Master observers to automatically remove quotas for a table when that table is deleted.
`long`	`updateReplicationPeerConfig(String peerId, ReplicationPeerConfig peerConfig)` Update the peerConfig for the specified peer
`boolean`	`waitForMetaOnline()` Check hbase:meta is up and ready for reading.

Methods inherited from class java.lang.Thread
activeCount, checkAccess, clone, countStackFrames, currentThread, destroy, dumpStack, enumerate, getAllStackTraces, getContextClassLoader, getDefaultUncaughtExceptionHandler, getId, getName, getPriority, getStackTrace, getState, getThreadGroup, getUncaughtExceptionHandler, holdsLock, interrupt, interrupted, isAlive, isDaemon, isInterrupted, join, join, join, resume, setContextClassLoader, setDaemon, setDefaultUncaughtExceptionHandler, setName, setPriority, setUncaughtExceptionHandler, sleep, sleep, start, stop, stop, suspend, yield

Methods inherited from class java.lang.Object
equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.hadoop.hbase.master.MasterServices
getAccessChecker, getExecutorService, getTableDescriptors, getZKPermissionWatcher, isClusterUp

Methods inherited from interface org.apache.hadoop.hbase.Server
createConnection, getAsyncClusterConnection, getAsyncConnection, getChoreService, getConfiguration, getConnection, getCoordinatedStateManager, getFileSystem, getZooKeeper, isStopping

Methods inherited from interface org.apache.hadoop.hbase.Abortable
abort, isAborted

Methods inherited from interface org.apache.hadoop.hbase.Stoppable
isStopped

- Field Detail
  - MASTER
```
public static final String MASTER
```
    See Also:
    
    Constant Field Values
  - HBASE_MASTER_WAIT_ON_SERVICE_IN_SECONDS
```
public static final String HBASE_MASTER_WAIT_ON_SERVICE_IN_SECONDS
```
    See Also:
    
    Constant Field Values
  - DEFAULT_HBASE_MASTER_WAIT_ON_SERVICE_IN_SECONDS
```
public static final int DEFAULT_HBASE_MASTER_WAIT_ON_SERVICE_IN_SECONDS
```
    See Also:
    
    Constant Field Values
  - HBASE_MASTER_CLEANER_INTERVAL
```
public static final String HBASE_MASTER_CLEANER_INTERVAL
```
    See Also:
    
    Constant Field Values
  - DEFAULT_HBASE_MASTER_CLEANER_INTERVAL
```
public static final int DEFAULT_HBASE_MASTER_CLEANER_INTERVAL
```
    See Also:
    
    Constant Field Values
  - WARMUP_BEFORE_MOVE
```
public static final String WARMUP_BEFORE_MOVE
```
    See Also:
    
    Constant Field Values
- Constructor Detail
  - HMaster
```
public HMaster(org.apache.hadoop.conf.Configuration conf)
        throws IOException
```
    Initializes the HMaster. The steps are as follows:
    1. Initialize the local HRegionServer
    2. Start the ActiveMasterManager.
    Remaining steps of initialization occur in finishActiveMasterInitialization(MonitoredTask) after the master becomes the active one.
    Throws:
    
    IOException
- Method Detail
  - createActiveMasterManager
```
protected ActiveMasterManager createActiveMasterManager(ZKWatcher zk,
                                                        ServerName sn,
                                                        Server server)
                                                 throws InterruptedIOException
```
    Protected to have custom implementations in tests override the default ActiveMaster implementation.
    
    Throws:
    
    InterruptedIOException
  - getUseThisHostnameInstead
```
protected String getUseThisHostnameInstead(org.apache.hadoop.conf.Configuration conf)
```
    Specified by:
    
    getUseThisHostnameInstead in class HBaseServerBase<MasterRpcServices>
  - run
```
public void run()
```
    Specified by:
    
    run in interface Runnable
    
    Overrides:
    
    run in class Thread
  - login
```
protected void login(UserProvider user,
                     String host)
              throws IOException
```
    For compatibility, if failed with regionserver credentials, try the master one
    
    Specified by:
    
    login in class HBaseServerBase<MasterRpcServices>
    
    Throws:
    
    IOException
  - getMasterRpcServices
```
public MasterRpcServices getMasterRpcServices()
```
  - balanceSwitch
```
public boolean balanceSwitch(boolean b)
                      throws IOException
```
    Throws:
    
    IOException
  - getProcessName
```
protected String getProcessName()
```
    Specified by:
    
    getProcessName in class HBaseServerBase<MasterRpcServices>
  - canCreateBaseZNode
```
protected boolean canCreateBaseZNode()
```
    Specified by:
    
    canCreateBaseZNode in class HBaseServerBase<MasterRpcServices>
  - canUpdateTableDescriptor
```
protected boolean canUpdateTableDescriptor()
```
    Specified by:
    
    canUpdateTableDescriptor in class HBaseServerBase<MasterRpcServices>
  - cacheTableDescriptor
```
protected boolean cacheTableDescriptor()
```
    Specified by:
    
    cacheTableDescriptor in class HBaseServerBase<MasterRpcServices>
  - createRpcServices
```
protected MasterRpcServices createRpcServices()
                                       throws IOException
```
    Specified by:
    
    createRpcServices in class HBaseServerBase<MasterRpcServices>
    
    Throws:
    
    IOException
  - configureInfoServer
```
protected void configureInfoServer(InfoServer infoServer)
```
    Specified by:
    
    configureInfoServer in class HBaseServerBase<MasterRpcServices>
  - getDumpServlet
```
protected Class<? extends javax.servlet.http.HttpServlet> getDumpServlet()
```
    Specified by:
    
    getDumpServlet in class HBaseServerBase<MasterRpcServices>
  - getMasterMetrics
```
public MetricsMaster getMasterMetrics()
```
    Specified by:
    
    getMasterMetrics in interface MasterServices
    
    Returns:
    
    Master's instance of MetricsMaster
  - createAssignmentManager
```
@InterfaceAudience.Private
protected AssignmentManager createAssignmentManager(MasterServices master,
                                                                               MasterRegion masterRegion)
```
  - waitForMetaOnline
```
@InterfaceAudience.Private
public boolean waitForMetaOnline()
```
    Check hbase:meta is up and ready for reading. For use during Master startup only.
    
    Returns:
    
    True if meta is UP and online and startup can progress. Otherwise, meta is not online and we will hold here until operator intervention.
  - updateConfigurationForQuotasObserver
```
@InterfaceAudience.Private
public void updateConfigurationForQuotasObserver(org.apache.hadoop.conf.Configuration conf)
```
    Adds the MasterQuotasObserver to the list of configured Master observers to automatically remove quotas for a table when that table is deleted.
  - createServerManager
```
@InterfaceAudience.Private
protected ServerManager createServerManager(MasterServices master,
                                                                       RegionServerList storage)
                                                                throws IOException
```
    Create a ServerManager instance.
    
    Will be overridden in tests.
    
    Throws:
    
    IOException
  - initClusterSchemaService
```
@InterfaceAudience.Private
protected void initClusterSchemaService()
                                                            throws IOException,
                                                                   InterruptedException
```
    Throws:
    
    IOException
    
    InterruptedException
  - isCatalogJanitorEnabled
```
public boolean isCatalogJanitorEnabled()
```
  - getServerManager
```
public ServerManager getServerManager()
```
    Specified by:
    
    getServerManager in interface MasterServices
    
    Returns:
    
    Master's ServerManager instance.
  - getMasterFileSystem
```
public MasterFileSystem getMasterFileSystem()
```
    Specified by:
    
    getMasterFileSystem in interface MasterServices
    
    Returns:
    
    Master's filesystem MasterFileSystem utility class.
  - getMasterWalManager
```
public MasterWalManager getMasterWalManager()
```
    Specified by:
    
    getMasterWalManager in interface MasterServices
    
    Returns:
    
    Master's WALs MasterWalManager utility class.
  - getSplitWALManager
```
public SplitWALManager getSplitWALManager()
```
    Specified by:
    
    getSplitWALManager in interface MasterServices
    
    Returns:
    
    return null if current is zk-based WAL splitting
  - getTableStateManager
```
public TableStateManager getTableStateManager()
```
    Specified by:
    
    getTableStateManager in interface MasterServices
    
    Returns:
    
    Master's instance of TableStateManager
  - stopServiceThreads
```
protected void stopServiceThreads()
```
  - startProcedureExecutor
```
protected void startProcedureExecutor()
                               throws IOException
```
    Throws:
    
    IOException
  - stopChores
```
protected void stopChores()
```
    Specified by:
    
    stopChores in class HBaseServerBase<MasterRpcServices>
  - balance
```
public BalanceResponse balance()
                        throws IOException
```
    Throws:
    
    IOException
  - balanceOrUpdateMetrics
```
public BalanceResponse balanceOrUpdateMetrics()
                                       throws IOException
```
    Trigger a normal balance, see balance() . If the balance is not executed this time, the metrics related to the balance will be updated. When balance is running, related metrics will be updated at the same time. But if some checking logic failed and cause the balancer exit early, we lost the chance to update balancer metrics. This will lead to user missing the latest balancer info.
    
    Throws:
    
    IOException
  - skipRegionManagementAction
```
public boolean skipRegionManagementAction(String action)
```
    Checks master state before initiating action over region topology.
    
    Specified by:
    
    skipRegionManagementAction in interface MasterServices
    
    Parameters:
    
    action - the name of the action under consideration, for logging.
    
    Returns:
    
    true when the caller should exit early, false otherwise.
  - balance
```
public BalanceResponse balance(BalanceRequest request)
                        throws IOException
```
    Throws:
    
    IOException
  - executeRegionPlansWithThrottling
```
public List<RegionPlan> executeRegionPlansWithThrottling(List<RegionPlan> plans)
```
    Execute region plans with throttling
    
    Specified by:
    
    executeRegionPlansWithThrottling in interface MasterServices
    
    Parameters:
    
    plans - to execute
    
    Returns:
    
    succeeded plans
  - getRegionNormalizerManager
```
public RegionNormalizerManager getRegionNormalizerManager()
```
    Specified by:
    
    getRegionNormalizerManager in interface MasterServices
    
    Returns:
    
    Master's instance of RegionNormalizerManager
  - normalizeRegions
```
public boolean normalizeRegions(NormalizeTableFilterParams ntfp,
                                boolean isHighPriority)
                         throws IOException
```
    Description copied from interface: MasterServices
    
    Perform normalization of cluster.
    
    Specified by:
    
    normalizeRegions in interface MasterServices
    
    Parameters:
    
    ntfp - Selection criteria for identifying which tables to normalize.
    
    isHighPriority - true when these requested tables should skip to the front of the queue.
    
    Returns:
    
    true when the request was submitted, false otherwise.
    
    Throws:
    
    IOException
  - getClientIdAuditPrefix
```
public String getClientIdAuditPrefix()
```
    Specified by:
    
    getClientIdAuditPrefix in interface MasterServices
    
    Returns:
    
    Client info for use as prefix on an audit log string; who did an action
  - setCatalogJanitorEnabled
```
public void setCatalogJanitorEnabled(boolean b)
```
    Switch for the background CatalogJanitor thread. Used for testing. The thread will continue to run. It will just be a noop if disabled.
    
    Parameters:
    
    b - If false, the catalog janitor won't do anything.
  - mergeRegions
```
public long mergeRegions(RegionInfo[] regionsToMerge,
                         boolean forcible,
                         long ng,
                         long nonce)
                  throws IOException
```
    Description copied from interface: MasterServices
    
    Merge regions in a table.
    
    Specified by:
    
    mergeRegions in interface MasterServices
    
    Parameters:
    
    regionsToMerge - daughter regions to merge
    
    forcible - whether to force to merge even two regions are not adjacent
    
    ng - used to detect duplicate
    
    nonce - used to detect duplicate
    
    Returns:
    
    procedure Id n
    
    Throws:
    
    IOException
  - splitRegion
```
public long splitRegion(RegionInfo regionInfo,
                        byte[] splitRow,
                        long nonceGroup,
                        long nonce)
                 throws IOException
```
    Description copied from interface: MasterServices
    
    Split a region.
    
    Specified by:
    
    splitRegion in interface MasterServices
    
    Parameters:
    
    regionInfo - region to split
    
    splitRow - split point
    
    nonceGroup - used to detect duplicate
    
    nonce - used to detect duplicate
    
    Returns:
    
    procedure Id n
    
    Throws:
    
    IOException
  - move
```
@InterfaceAudience.Private
public void move(byte[] encodedRegionName,
                                            byte[] destServerName)
                                     throws IOException
```
    Throws:
    
    IOException
  - createTable
```
public long createTable(TableDescriptor tableDescriptor,
                        byte[][] splitKeys,
                        long nonceGroup,
                        long nonce)
                 throws IOException
```
    Description copied from interface: MasterServices
    
    Create a table using the given table definition.
    
    Specified by:
    
    createTable in interface MasterServices
    
    Parameters:
    
    tableDescriptor - The table definition
    
    splitKeys - Starting row keys for the initial table regions. If null nn * a single region is created.
    
    Throws:
    
    IOException
  - createSystemTable
```
public long createSystemTable(TableDescriptor tableDescriptor)
                       throws IOException
```
    Description copied from interface: MasterServices
    
    Create a system table using the given table definition.
    
    Specified by:
    
    createSystemTable in interface MasterServices
    
    Parameters:
    
    tableDescriptor - The system table definition a single region is created.
    
    Throws:
    
    IOException
  - deleteTable
```
public long deleteTable(TableName tableName,
                        long nonceGroup,
                        long nonce)
                 throws IOException
```
    Description copied from interface: MasterServices
    
    Delete a table
    
    Specified by:
    
    deleteTable in interface MasterServices
    
    Parameters:
    
    tableName - The table name nnn
    
    Throws:
    
    IOException
  - truncateTable
```
public long truncateTable(TableName tableName,
                          boolean preserveSplits,
                          long nonceGroup,
                          long nonce)
                   throws IOException
```
    Description copied from interface: MasterServices
    
    Truncate a table
    
    Specified by:
    
    truncateTable in interface MasterServices
    
    Parameters:
    
    tableName - The table name
    
    preserveSplits - True if the splits should be preserved nnn
    
    Throws:
    
    IOException
  - addColumn
```
public long addColumn(TableName tableName,
                      ColumnFamilyDescriptor column,
                      long nonceGroup,
                      long nonce)
               throws IOException
```
    Description copied from interface: MasterServices
    
    Add a new column to an existing table
    
    Specified by:
    
    addColumn in interface MasterServices
    
    Parameters:
    
    tableName - The table name
    
    column - The column definition nnn
    
    Throws:
    
    IOException
  - modifyColumn
```
public long modifyColumn(TableName tableName,
                         ColumnFamilyDescriptor descriptor,
                         long nonceGroup,
                         long nonce)
                  throws IOException
```
    Description copied from interface: MasterServices
    
    Modify the column descriptor of an existing column in an existing table
    
    Specified by:
    
    modifyColumn in interface MasterServices
    
    Parameters:
    
    tableName - The table name
    
    descriptor - The updated column definition nnn
    
    Throws:
    
    IOException
  - modifyColumnStoreFileTracker
```
public long modifyColumnStoreFileTracker(TableName tableName,
                                         byte[] family,
                                         String dstSFT,
                                         long nonceGroup,
                                         long nonce)
                                  throws IOException
```
    Description copied from interface: MasterServices
    
    Modify the store file tracker of an existing column in an existing table
    
    Specified by:
    
    modifyColumnStoreFileTracker in interface MasterServices
    
    Throws:
    
    IOException
  - deleteColumn
```
public long deleteColumn(TableName tableName,
                         byte[] columnName,
                         long nonceGroup,
                         long nonce)
                  throws IOException
```
    Description copied from interface: MasterServices
    
    Delete a column from an existing table
    
    Specified by:
    
    deleteColumn in interface MasterServices
    
    Parameters:
    
    tableName - The table name
    
    columnName - The column name nnn
    
    Throws:
    
    IOException
  - enableTable
```
public long enableTable(TableName tableName,
                        long nonceGroup,
                        long nonce)
                 throws IOException
```
    Description copied from interface: MasterServices
    
    Enable an existing table
    
    Specified by:
    
    enableTable in interface MasterServices
    
    Parameters:
    
    tableName - The table name nnn
    
    Throws:
    
    IOException
  - disableTable
```
public long disableTable(TableName tableName,
                         long nonceGroup,
                         long nonce)
                  throws IOException
```
    Description copied from interface: MasterServices
    
    Disable an existing table
    
    Specified by:
    
    disableTable in interface MasterServices
    
    Parameters:
    
    tableName - The table name nnn
    
    Throws:
    
    IOException
  - modifyTable
```
public long modifyTable(TableName tableName,
                        TableDescriptor newDescriptor,
                        long nonceGroup,
                        long nonce)
                 throws IOException
```
    Description copied from interface: MasterServices
    
    Modify the descriptor of an existing table
    
    Specified by:
    
    modifyTable in interface MasterServices
    
    Parameters:
    
    tableName - The table name
    
    newDescriptor - The updated table descriptor nnn
    
    Throws:
    
    IOException
  - modifyTableStoreFileTracker
```
public long modifyTableStoreFileTracker(TableName tableName,
                                        String dstSFT,
                                        long nonceGroup,
                                        long nonce)
                                 throws IOException
```
    Description copied from interface: MasterServices
    
    Modify the store file tracker of an existing table
    
    Specified by:
    
    modifyTableStoreFileTracker in interface MasterServices
    
    Throws:
    
    IOException
  - restoreSnapshot
```
public long restoreSnapshot(org.apache.hadoop.hbase.shaded.protobuf.generated.SnapshotProtos.SnapshotDescription snapshotDesc,
                            long nonceGroup,
                            long nonce,
                            boolean restoreAcl,
                            String customSFT)
                     throws IOException
```
    Throws:
    
    IOException
  - checkTableModifiable
```
public void checkTableModifiable(TableName tableName)
                          throws IOException,
                                 TableNotFoundException,
                                 TableNotDisabledException
```
    Description copied from interface: MasterServices
    
    Check table is modifiable; i.e. exists and is offline.
    
    Specified by:
    
    checkTableModifiable in interface MasterServices
    
    Parameters:
    
    tableName - Name of table to check. nnn
    
    Throws:
    
    IOException
    
    TableNotFoundException
    
    TableNotDisabledException
  - getClusterMetricsWithoutCoprocessor
```
public ClusterMetrics getClusterMetricsWithoutCoprocessor()
                                                   throws InterruptedIOException
```
    Throws:
    
    InterruptedIOException
  - getClusterMetricsWithoutCoprocessor
```
public ClusterMetrics getClusterMetricsWithoutCoprocessor(EnumSet<ClusterMetrics.Option> options)
                                                   throws InterruptedIOException
```
    Throws:
    
    InterruptedIOException
  - getClusterMetrics
```
public ClusterMetrics getClusterMetrics()
                                 throws IOException
```
    Returns:
    
    cluster status
    
    Throws:
    
    IOException
  - getClusterMetrics
```
public ClusterMetrics getClusterMetrics(EnumSet<ClusterMetrics.Option> options)
                                 throws IOException
```
    Throws:
    
    IOException
  - getActiveMasterInfoPort
```
public int getActiveMasterInfoPort()
```
    Returns:
    
    info port of active master or 0 if any exception occurs.
  - getBackupMasterInfoPort
```
public int getBackupMasterInfoPort(ServerName sn)
```
    Parameters:
    
    sn - is ServerName of the backup master
    
    Returns:
    
    info port of backup master or 0 if any exception occurs.
  - getLoadedCoprocessors
```
public static String getLoadedCoprocessors()
```
    The set of loaded coprocessors is stored in a static set. Since it's statically allocated, it does not require that HMaster's cpHost be initialized prior to accessing it.
    
    Returns:
    
    a String representation of the set of names of the loaded coprocessors.
  - getMasterStartTime
```
public long getMasterStartTime()
```
    Returns:
    
    timestamp in millis when HMaster was started.
  - getMasterActiveTime
```
public long getMasterActiveTime()
```
    Returns:
    
    timestamp in millis when HMaster became the active master.
  - getMasterFinishedInitializationTime
```
public long getMasterFinishedInitializationTime()
```
    Returns:
    
    timestamp in millis when HMaster finished becoming the active master
  - getNumWALFiles
```
public int getNumWALFiles()
```
  - getProcedureStore
```
public ProcedureStore getProcedureStore()
```
  - getRegionServerInfoPort
```
public int getRegionServerInfoPort(ServerName sn)
```
  - getRegionServerVersion
```
public String getRegionServerVersion(ServerName sn)
```
    Specified by:
    
    getRegionServerVersion in interface MasterServices
  - checkIfShouldMoveSystemRegionAsync
```
public void checkIfShouldMoveSystemRegionAsync()
```
    Description copied from interface: MasterServices
    
    Called when a new RegionServer is added to the cluster. Checks if new server has a newer version than any existing server and will move system tables there if so.
    
    Specified by:
    
    checkIfShouldMoveSystemRegionAsync in interface MasterServices
  - getMasterCoprocessors
```
public String[] getMasterCoprocessors()
```
    Returns:
    
    array of coprocessor SimpleNames.
  - abort
```
public void abort(String reason,
                  Throwable cause)
```
    Specified by:
    
    abort in interface Abortable
  - getMasterCoprocessorHost
```
public MasterCoprocessorHost getMasterCoprocessorHost()
```
    Specified by:
    
    getMasterCoprocessorHost in interface MasterServices
    
    Returns:
    
    Master's instance of MasterCoprocessorHost
  - getMasterQuotaManager
```
public MasterQuotaManager getMasterQuotaManager()
```
    Specified by:
    
    getMasterQuotaManager in interface MasterServices
    
    Returns:
    
    Master's instance of MasterQuotaManager
  - getMasterProcedureExecutor
```
public ProcedureExecutor<MasterProcedureEnv> getMasterProcedureExecutor()
```
    Specified by:
    
    getMasterProcedureExecutor in interface MasterServices
    
    Returns:
    
    Master's instance of ProcedureExecutor
  - getServerName
```
public ServerName getServerName()
```
    Specified by:
    
    getServerName in interface Server
    
    Overrides:
    
    getServerName in class HBaseServerBase<MasterRpcServices>
    
    Returns:
    
    The unique server name for this server.
  - getAssignmentManager
```
public AssignmentManager getAssignmentManager()
```
    Specified by:
    
    getAssignmentManager in interface MasterServices
    
    Returns:
    
    Master's instance of the AssignmentManager
  - getCatalogJanitor
```
public CatalogJanitor getCatalogJanitor()
```
    Specified by:
    
    getCatalogJanitor in interface MasterServices
    
    Returns:
    
    Master's instance of CatalogJanitor
  - getRegionServerFatalLogBuffer
```
public MemoryBoundedLogMessageBuffer getRegionServerFatalLogBuffer()
```
  - shutdown
```
public void shutdown()
              throws IOException
```
    Shutdown the cluster. Master runs a coordinated stop of all RegionServers and then itself.
    
    Throws:
    
    IOException
  - stopMaster
```
public void stopMaster()
                throws IOException
```
    Throws:
    
    IOException
  - stop
```
public void stop(String msg)
```
    Specified by:
    
    stop in interface Stoppable
  - checkServiceStarted
```
protected void checkServiceStarted()
                            throws ServerNotRunningYetException
```
    Throws:
    
    ServerNotRunningYetException
  - isActiveMaster
```
public boolean isActiveMaster()
```
    Report whether this master is currently the active master or not. If not active master, we are parked on ZK waiting to become active. This method is used for testing.
    
    Specified by:
    
    isActiveMaster in interface MasterServices
    
    Returns:
    
    true if active master, false if not.
  - isInitialized
```
public boolean isInitialized()
```
    Report whether this master has completed with its initialization and is ready. If ready, the master is also the active master. A standby master is never ready. This method is used for testing.
    
    Specified by:
    
    isInitialized in interface MasterServices
    
    Returns:
    
    true if master is ready to go, false if not.
  - isOnline
```
public boolean isOnline()
```
    Report whether this master is started This method is used for testing.
    
    Returns:
    
    true if master is ready to go, false if not.
  - isInMaintenanceMode
```
public boolean isInMaintenanceMode()
```
    Report whether this master is in maintenance mode.
    
    Specified by:
    
    isInMaintenanceMode in interface MasterServices
    
    Returns:
    
    true if master is in maintenanceMode
  - setInitialized
```
public void setInitialized(boolean isInitialized)
```
  - getInitializedEvent
```
public ProcedureEvent<?> getInitializedEvent()
```
    Specified by:
    
    getInitializedEvent in interface MasterServices
    
    Returns:
    
    Tripped when Master has finished initialization.
  - getAverageLoad
```
public double getAverageLoad()
```
    Compute the average load across all region servers. Currently, this uses a very naive computation - just uses the number of regions being served, ignoring stats about number of requests.
    
    Returns:
    
    the average load
  - registerService
```
public boolean registerService(org.apache.hbase.thirdparty.com.google.protobuf.Service instance)
```
    Description copied from interface: MasterServices
    
    Registers a new protocol buffer Service subclass as a master coprocessor endpoint.
    Only a single instance may be registered for a given Service subclass (the instances are keyed on Descriptors.ServiceDescriptor.getFullName(). After the first registration, subsequent calls with the same service name will fail with a return value of false.
    
    Specified by:
    
    registerService in interface MasterServices
    
    Parameters:
    
    instance - the Service subclass instance to expose as a coprocessor endpoint
    
    Returns:
    
    true if the registration was successful, false otherwise
  - constructMaster
```
public static HMaster constructMaster(Class<? extends HMaster> masterClass,
                                      org.apache.hadoop.conf.Configuration conf)
```
    Utility for constructing an instance of the passed HMaster class. n * @return HMaster instance.
  - main
```
public static void main(String[] args)
```
    See Also:
    
    HMasterCommandLine
  - getHFileCleaner
```
public HFileCleaner getHFileCleaner()
```
  - getHFileCleaners
```
public List<HFileCleaner> getHFileCleaners()
```
  - getLogCleaner
```
public LogCleaner getLogCleaner()
```
  - getSnapshotManager
```
public SnapshotManager getSnapshotManager()
```
    Specified by:
    
    getSnapshotManager in interface MasterServices
    
    Returns:
    
    the underlying snapshot manager
  - getMasterProcedureManagerHost
```
public MasterProcedureManagerHost getMasterProcedureManagerHost()
```
    Specified by:
    
    getMasterProcedureManagerHost in interface MasterServices
    
    Returns:
    
    the underlying MasterProcedureManagerHost
  - getClusterSchema
```
public ClusterSchema getClusterSchema()
```
    Specified by:
    
    getClusterSchema in interface MasterServices
    
    Returns:
    
    Master's instance of ClusterSchema
  - listNamespaces
```
public List<String> listNamespaces()
                            throws IOException
```
    List namespace names
    
    Returns:
    
    All namespace names
    
    Throws:
    
    IOException
  - listTableNamesByNamespace
```
public List<TableName> listTableNamesByNamespace(String name)
                                          throws IOException
```
    Description copied from interface: MasterServices
    
    Get list of table names by namespace
    
    Specified by:
    
    listTableNamesByNamespace in interface MasterServices
    
    Parameters:
    
    name - namespace name
    
    Returns:
    
    table names n
    
    Throws:
    
    IOException
  - listTableDescriptorsByNamespace
```
public List<TableDescriptor> listTableDescriptorsByNamespace(String name)
                                                      throws IOException
```
    Description copied from interface: MasterServices
    
    Get list of table descriptors by namespace
    
    Specified by:
    
    listTableDescriptorsByNamespace in interface MasterServices
    
    Parameters:
    
    name - namespace name nn
    
    Throws:
    
    IOException
  - abortProcedure
```
public boolean abortProcedure(long procId,
                              boolean mayInterruptIfRunning)
                       throws IOException
```
    Description copied from interface: MasterServices
    
    Abort a procedure.
    
    Specified by:
    
    abortProcedure in interface MasterServices
    
    Parameters:
    
    procId - ID of the procedure
    
    mayInterruptIfRunning - if the proc completed at least one step, should it be aborted?
    
    Returns:
    
    true if aborted, false if procedure already completed or does not exist n
    
    Throws:
    
    IOException
  - getProcedures
```
public List<Procedure<?>> getProcedures()
                                 throws IOException
```
    Description copied from interface: MasterServices
    
    Get procedures
    
    Specified by:
    
    getProcedures in interface MasterServices
    
    Returns:
    
    procedure list n
    
    Throws:
    
    IOException
  - getLocks
```
public List<LockedResource> getLocks()
                              throws IOException
```
    Description copied from interface: MasterServices
    
    Get locks
    
    Specified by:
    
    getLocks in interface MasterServices
    
    Returns:
    
    lock list n
    
    Throws:
    
    IOException
  - listTableDescriptors
```
public List<TableDescriptor> listTableDescriptors(String namespace,
                                                  String regex,
                                                  List<TableName> tableNameList,
                                                  boolean includeSysTables)
                                           throws IOException
```
    Returns the list of table descriptors that match the specified request
    
    Parameters:
    
    namespace - the namespace to query, or null if querying for all
    
    regex - The regular expression to match against, or null if querying for all
    
    tableNameList - the list of table names, or null if querying for all
    
    includeSysTables - False to match only against userspace tables
    
    Returns:
    
    the list of table descriptors
    
    Throws:
    
    IOException
  - listTableNames
```
public List<TableName> listTableNames(String namespace,
                                      String regex,
                                      boolean includeSysTables)
                               throws IOException
```
    Returns the list of table names that match the specified request
    
    Parameters:
    
    regex - The regular expression to match against, or null if querying for all
    
    namespace - the namespace to query, or null if querying for all
    
    includeSysTables - False to match only against userspace tables
    
    Returns:
    
    the list of table names
    
    Throws:
    
    IOException
  - getLastMajorCompactionTimestamp
```
public long getLastMajorCompactionTimestamp(TableName table)
                                     throws IOException
```
    Specified by:
    
    getLastMajorCompactionTimestamp in interface MasterServices
    
    Parameters:
    
    table - the table for which last successful major compaction time is queried
    
    Returns:
    
    the timestamp of the last successful major compaction for the passed table, or 0 if no HFile resulting from a major compaction exists n
    
    Throws:
    
    IOException
  - getLastMajorCompactionTimestampForRegion
```
public long getLastMajorCompactionTimestampForRegion(byte[] regionName)
                                              throws IOException
```
    Description copied from interface: MasterServices
    
    n * @return the timestamp of the last successful major compaction for the passed region or 0 if no HFile resulting from a major compaction exists n
    
    Specified by:
    
    getLastMajorCompactionTimestampForRegion in interface MasterServices
    
    Throws:
    
    IOException
  - getMobCompactionState
```
public org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.GetRegionInfoResponse.CompactionState getMobCompactionState(TableName tableName)
```
    Gets the mob file compaction state for a specific table. Whether all the mob files are selected is known during the compaction execution, but the statistic is done just before compaction starts, it is hard to know the compaction type at that time, so the rough statistics are chosen for the mob file compaction. Only two compaction states are available, CompactionState.MAJOR_AND_MINOR and CompactionState.NONE.
    
    Parameters:
    
    tableName - The current table name.
    
    Returns:
    
    If a given table is in mob file compaction now.
  - reportMobCompactionStart
```
public void reportMobCompactionStart(TableName tableName)
                              throws IOException
```
    Throws:
    
    IOException
  - reportMobCompactionEnd
```
public void reportMobCompactionEnd(TableName tableName)
                            throws IOException
```
    Throws:
    
    IOException
  - isBalancerOn
```
public boolean isBalancerOn()
```
    Queries the state of the LoadBalancerTracker. If the balancer is not initialized, false is returned.
    
    Specified by:
    
    isBalancerOn in interface MasterServices
    
    Returns:
    
    The state of the load balancer, or false if the load balancer isn't defined.
  - isNormalizerOn
```
public boolean isNormalizerOn()
```
    Queries the state of the RegionNormalizerTracker. If it's not initialized, false is returned.
  - isSplitOrMergeEnabled
```
public boolean isSplitOrMergeEnabled(MasterSwitchType switchType)
```
    Queries the state of the SplitOrMergeTracker. If it is not initialized, false is returned. If switchType is illegal, false will return.
    
    Specified by:
    
    isSplitOrMergeEnabled in interface MasterServices
    
    Parameters:
    
    switchType - see MasterSwitchType
    
    Returns:
    
    The state of the switch
  - getLoadBalancerClassName
```
public String getLoadBalancerClassName()
```
    Fetch the configured LoadBalancer class name. If none is set, a default is returned.
    Notice that, the base load balancer will always be RSGroupBasedLoadBalancer now, so this method will return the balancer used inside each rs group.
    
    Returns:
    
    The name of the LoadBalancer in use.
  - getSplitOrMergeTracker
```
public SplitOrMergeTracker getSplitOrMergeTracker()
```
  - getLoadBalancer
```
public RSGroupBasedLoadBalancer getLoadBalancer()
```
    Specified by:
    
    getLoadBalancer in interface MasterServices
    
    Returns:
    
    load balancer
  - getFavoredNodesManager
```
public FavoredNodesManager getFavoredNodesManager()
```
    Specified by:
    
    getFavoredNodesManager in interface MasterServices
    
    Returns:
    
    Favored Nodes Manager
  - addReplicationPeer
```
public long addReplicationPeer(String peerId,
                               ReplicationPeerConfig peerConfig,
                               boolean enabled)
                        throws ReplicationException,
                               IOException
```
    Description copied from interface: MasterServices
    
    Add a new replication peer for replicating data to slave cluster
    
    Specified by:
    
    addReplicationPeer in interface MasterServices
    
    Parameters:
    
    peerId - a short name that identifies the peer
    
    peerConfig - configuration for the replication slave cluster
    
    enabled - peer state, true if ENABLED and false if DISABLED
    
    Throws:
    
    ReplicationException
    
    IOException
  - removeReplicationPeer
```
public long removeReplicationPeer(String peerId)
                           throws ReplicationException,
                                  IOException
```
    Description copied from interface: MasterServices
    
    Removes a peer and stops the replication
    
    Specified by:
    
    removeReplicationPeer in interface MasterServices
    
    Parameters:
    
    peerId - a short name that identifies the peer
    
    Throws:
    
    ReplicationException
    
    IOException
  - enableReplicationPeer
```
public long enableReplicationPeer(String peerId)
                           throws ReplicationException,
                                  IOException
```
    Description copied from interface: MasterServices
    
    Restart the replication stream to the specified peer
    
    Specified by:
    
    enableReplicationPeer in interface MasterServices
    
    Parameters:
    
    peerId - a short name that identifies the peer
    
    Throws:
    
    ReplicationException
    
    IOException
  - disableReplicationPeer
```
public long disableReplicationPeer(String peerId)
                            throws ReplicationException,
                                   IOException
```
    Description copied from interface: MasterServices
    
    Stop the replication stream to the specified peer
    
    Specified by:
    
    disableReplicationPeer in interface MasterServices
    
    Parameters:
    
    peerId - a short name that identifies the peer
    
    Throws:
    
    ReplicationException
    
    IOException
  - getReplicationPeerConfig
```
public ReplicationPeerConfig getReplicationPeerConfig(String peerId)
                                               throws ReplicationException,
                                                      IOException
```
    Description copied from interface: MasterServices
    
    Returns the configured ReplicationPeerConfig for the specified peer
    
    Specified by:
    
    getReplicationPeerConfig in interface MasterServices
    
    Parameters:
    
    peerId - a short name that identifies the peer
    
    Returns:
    
    ReplicationPeerConfig for the peer
    
    Throws:
    
    ReplicationException
    
    IOException
  - updateReplicationPeerConfig
```
public long updateReplicationPeerConfig(String peerId,
                                        ReplicationPeerConfig peerConfig)
                                 throws ReplicationException,
                                        IOException
```
    Description copied from interface: MasterServices
    
    Update the peerConfig for the specified peer
    
    Specified by:
    
    updateReplicationPeerConfig in interface MasterServices
    
    Parameters:
    
    peerId - a short name that identifies the peer
    
    peerConfig - new config for the peer
    
    Throws:
    
    ReplicationException
    
    IOException
  - listReplicationPeers
```
public List<ReplicationPeerDescription> listReplicationPeers(String regex)
                                                      throws ReplicationException,
                                                             IOException
```
    Description copied from interface: MasterServices
    
    Return a list of replication peers.
    
    Specified by:
    
    listReplicationPeers in interface MasterServices
    
    Parameters:
    
    regex - The regular expression to match peer id
    
    Returns:
    
    a list of replication peers description
    
    Throws:
    
    ReplicationException
    
    IOException
  - transitReplicationPeerSyncReplicationState
```
public long transitReplicationPeerSyncReplicationState(String peerId,
                                                       SyncReplicationState state)
                                                throws ReplicationException,
                                                       IOException
```
    Description copied from interface: MasterServices
    
    Set current cluster state for a synchronous replication peer.
    
    Specified by:
    
    transitReplicationPeerSyncReplicationState in interface MasterServices
    
    Parameters:
    
    peerId - a short name that identifies the peer
    
    state - state of current cluster
    
    Throws:
    
    ReplicationException
    
    IOException
  - decommissionRegionServers
```
public void decommissionRegionServers(List<ServerName> servers,
                                      boolean offload)
                               throws IOException
```
    Mark region server(s) as decommissioned (previously called 'draining') to prevent additional regions from getting assigned to them. Also unload the regions on the servers asynchronously.0
    
    Parameters:
    
    servers - Region servers to decommission.
    
    Throws:
    
    IOException
  - listDecommissionedRegionServers
```
public List<ServerName> listDecommissionedRegionServers()
```
    List region servers marked as decommissioned (previously called 'draining') to not get regions assigned to them.
    
    Returns:
    
    List of decommissioned servers.
  - recommissionRegionServer
```
public void recommissionRegionServer(ServerName server,
                                     List<byte[]> encodedRegionNames)
                              throws IOException
```
    Remove decommission marker (previously called 'draining') from a region server to allow regions assignments. Load regions onto the server asynchronously if a list of regions is given
    
    Parameters:
    
    server - Region server to remove decommission marker from.
    
    Throws:
    
    IOException
  - getLockManager
```
public LockManager getLockManager()
```
    Specified by:
    
    getLockManager in interface MasterServices
    
    Returns:
    
    LockManager to lock namespaces/tables/regions.
  - getQuotaObserverChore
```
public QuotaObserverChore getQuotaObserverChore()
```
  - getSpaceQuotaSnapshotNotifier
```
public SpaceQuotaSnapshotNotifier getSpaceQuotaSnapshotNotifier()
```
  - remoteProcedureCompleted
```
public void remoteProcedureCompleted(long procId)
```
  - remoteProcedureFailed
```
public void remoteProcedureFailed(long procId,
                                  RemoteProcedureException error)
```
  - getReplicationPeerManager
```
public ReplicationPeerManager getReplicationPeerManager()
```
    Description copied from interface: MasterServices
    
    Returns the ReplicationPeerManager.
    
    Specified by:
    
    getReplicationPeerManager in interface MasterServices
  - getReplicationLoad
```
public HashMap<String,List<Pair<ServerName,ReplicationLoadSource>>> getReplicationLoad(ServerName[] serverNames)
```
  - decorateMasterConfiguration
```
@InterfaceAudience.Private
public static void decorateMasterConfiguration(org.apache.hadoop.conf.Configuration conf)
```
    This method modifies the master's configuration in order to inject replication-related features
  - getSnapshotQuotaObserverChore
```
public SnapshotQuotaObserverChore getSnapshotQuotaObserverChore()
```
  - getActiveMasterManager
```
public ActiveMasterManager getActiveMasterManager()
```
  - getSyncReplicationReplayWALManager
```
public SyncReplicationReplayWALManager getSyncReplicationReplayWALManager()
```
    Description copied from interface: MasterServices
    
    Returns the SyncReplicationReplayWALManager.
    
    Specified by:
    
    getSyncReplicationReplayWALManager in interface MasterServices
  - getHbckChore
```
public HbckChore getHbckChore()
```
  - runReplicationBarrierCleaner
```
public void runReplicationBarrierCleaner()
```
    Description copied from interface: MasterServices
    
    Run the ReplicationBarrierChore.
    
    Specified by:
    
    runReplicationBarrierCleaner in interface MasterServices
  - getRSGroupInfoManager
```
public RSGroupInfoManager getRSGroupInfoManager()
```
    Specified by:
    
    getRSGroupInfoManager in interface MasterServices
    
    Returns:
    
    the RSGroupInfoManager
  - getCompactionState
```
public CompactionState getCompactionState(TableName tableName)
```
    Get the compaction state of the table
    
    Parameters:
    
    tableName - The table name
    
    Returns:
    
    CompactionState Compaction state of the table
  - getMetaLocationSyncer
```
public MetaLocationSyncer getMetaLocationSyncer()
```
    Description copied from interface: MasterServices
    
    Get the meta location syncer.
    We need to get this in MTP to tell the syncer the new meta replica count.
    
    Specified by:
    
    getMetaLocationSyncer in interface MasterServices
  - getMasterRegion
```
public MasterRegion getMasterRegion()
```
  - onConfigurationChange
```
public void onConfigurationChange(org.apache.hadoop.conf.Configuration newConf)
```
    Specified by:
    
    onConfigurationChange in interface ConfigurationObserver
  - createNamedQueueRecord
```
protected NamedQueueRecorder createNamedQueueRecord()
```
    Specified by:
    
    createNamedQueueRecord in class HBaseServerBase<MasterRpcServices>
  - clusterMode
```
protected boolean clusterMode()
```
    Specified by:
    
    clusterMode in class HBaseServerBase<MasterRpcServices>
  - getClusterId
```
public String getClusterId()
```
    Description copied from interface: ConnectionRegistryEndpoint
    
    Get cluster id.
    
    Specified by:
    
    getClusterId in interface ConnectionRegistryEndpoint
  - getActiveMaster
```
public Optional<ServerName> getActiveMaster()
```
    Description copied from interface: ConnectionRegistryEndpoint
    
    Get active master address.
    
    Specified by:
    
    getActiveMaster in interface ConnectionRegistryEndpoint
  - getBackupMasters
```
public List<ServerName> getBackupMasters()
```
    Description copied from interface: ConnectionRegistryEndpoint
    
    Get backup masters address.
    
    Specified by:
    
    getBackupMasters in interface ConnectionRegistryEndpoint
  - getBootstrapNodes
```
public Iterator<ServerName> getBootstrapNodes()
```
    Description copied from interface: ConnectionRegistryEndpoint
    
    Get a iterator of the available bootstrap nodes.
    
    Specified by:
    
    getBootstrapNodes in interface ConnectionRegistryEndpoint
  - getMetaLocations
```
public List<HRegionLocation> getMetaLocations()
```
    Description copied from interface: ConnectionRegistryEndpoint
    
    Get the location of meta regions.
    
    Specified by:
    
    getMetaLocations in interface ConnectionRegistryEndpoint
  - flushMasterStore
```
public void flushMasterStore()
                      throws IOException
```
    Description copied from interface: MasterServices
    
    Flush master local region
    
    Specified by:
    
    flushMasterStore in interface MasterServices
    
    Throws:
    
    IOException
  - getLiveRegionServers
```
public Collection<ServerName> getLiveRegionServers()
```
  - getConfigurationManager
```
public ConfigurationManager getConfigurationManager()
```

Class HMaster

Nested Class Summary

Nested classes/interfaces inherited from class java.lang.Thread

Field Summary

Fields inherited from class org.apache.hadoop.hbase.HBaseServerBase

Fields inherited from class java.lang.Thread

Constructor Summary

Method Summary

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

Methods inherited from class java.lang.Thread

Methods inherited from class java.lang.Object

Methods inherited from interface org.apache.hadoop.hbase.master.MasterServices

Methods inherited from interface org.apache.hadoop.hbase.Server

Methods inherited from interface org.apache.hadoop.hbase.Abortable

Methods inherited from interface org.apache.hadoop.hbase.Stoppable

Field Detail

MASTER

HBASE_MASTER_WAIT_ON_SERVICE_IN_SECONDS

DEFAULT_HBASE_MASTER_WAIT_ON_SERVICE_IN_SECONDS

HBASE_MASTER_CLEANER_INTERVAL

DEFAULT_HBASE_MASTER_CLEANER_INTERVAL

WARMUP_BEFORE_MOVE

Constructor Detail

HMaster

Method Detail

createActiveMasterManager

getUseThisHostnameInstead

run

login

getMasterRpcServices

balanceSwitch

getProcessName

canCreateBaseZNode

canUpdateTableDescriptor

cacheTableDescriptor

createRpcServices

configureInfoServer

getDumpServlet

getMasterMetrics

createAssignmentManager

waitForMetaOnline

updateConfigurationForQuotasObserver

createServerManager

initClusterSchemaService

isCatalogJanitorEnabled

getServerManager

getMasterFileSystem

getMasterWalManager

getSplitWALManager

getTableStateManager

stopServiceThreads

startProcedureExecutor

stopChores

balance

balanceOrUpdateMetrics

skipRegionManagementAction

balance

executeRegionPlansWithThrottling

getRegionNormalizerManager

normalizeRegions

getClientIdAuditPrefix

setCatalogJanitorEnabled

mergeRegions

splitRegion

move

createTable

createSystemTable

deleteTable

truncateTable

addColumn

modifyColumn

modifyColumnStoreFileTracker

deleteColumn

enableTable

disableTable

modifyTable

modifyTableStoreFileTracker

restoreSnapshot

checkTableModifiable

getClusterMetricsWithoutCoprocessor