org.apache.hadoop.hbase.master.procedure

Class SplitWALProcedure

java.lang.Object

org.apache.hadoop.hbase.procedure2.Procedure<TEnvironment>

org.apache.hadoop.hbase.procedure2.StateMachineProcedure<MasterProcedureEnv,MasterProcedureProtos.SplitWALState>

org.apache.hadoop.hbase.master.procedure.SplitWALProcedure

All Implemented Interfaces:

Comparable<Procedure<MasterProcedureEnv>>, ServerProcedureInterface

@InterfaceAudience.Private
public class SplitWALProcedure
extends StateMachineProcedure<MasterProcedureEnv,MasterProcedureProtos.SplitWALState>
implements ServerProcedureInterface

The procedure is to split a WAL. It will get an available region server and schedule a SplitWALRemoteProcedure to actually send the request to region server to split this WAL. It also check if the split wal task really succeed. If the WAL still exists, it will schedule another region server to split this WAL.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.hbase.procedure2.StateMachineProcedure

StateMachineProcedure.Flow

Nested classes/interfaces inherited from class org.apache.hadoop.hbase.procedure2.Procedure

Procedure.LockState

Nested classes/interfaces inherited from interface org.apache.hadoop.hbase.master.procedure.ServerProcedureInterface

ServerProcedureInterface.ServerOperationType

Field Summary

Fields inherited from class org.apache.hadoop.hbase.procedure2.StateMachineProcedure

stateCount

Fields inherited from class org.apache.hadoop.hbase.procedure2.Procedure

NO_PROC_ID, NO_TIMEOUT

Constructor Summary

Constructors

Constructor and Description
SplitWALProcedure()
SplitWALProcedure(String walPath, ServerName crashedServer)

Method Summary

Modifier and Type	Method and Description
protected void	afterReplay(MasterProcedureEnv env)
protected void	deserializeStateData(ProcedureStateSerializer serializer)
protected StateMachineProcedure.Flow	executeFromState(MasterProcedureEnv env, MasterProcedureProtos.SplitWALState state)
protected MasterProcedureProtos.SplitWALState	getInitialState()
ServerName	getServerName()
ServerProcedureInterface.ServerOperationType	getServerOperationType() Given an operation type we can take decisions about what to do with pending operations.
protected MasterProcedureProtos.SplitWALState	getState(int stateId)
protected int	getStateId(MasterProcedureProtos.SplitWALState state)
String	getWAL()
ServerName	getWorker()
boolean	hasMetaTableRegion()
protected void	rollbackState(MasterProcedureEnv env, MasterProcedureProtos.SplitWALState splitOneWalState)
protected void	serializeStateData(ProcedureStateSerializer serializer)
protected boolean	setTimeoutFailure(MasterProcedureEnv env)

Methods inherited from class org.apache.hadoop.hbase.procedure2.StateMachineProcedure

abort, addChildProcedure, execute, failIfAborted, getCurrentState, getCurrentStateId, getCycles, isEofState, isRollbackSupported, isYieldAfterExecutionStep, isYieldBeforeExecuteFromState, rollback, setNextState, toStringState

Methods inherited from class org.apache.hadoop.hbase.procedure2.Procedure

acquireLock, addStackIndex, beforeReplay, bypass, compareTo, completionCleanup, doExecute, doRollback, elapsedTime, getChildrenLatch, getException, getLastUpdate, getNonceKey, getOwner, getParentProcId, getProcedureMetrics, getProcId, getProcIdHashCode, getProcName, getResult, getRootProcedureId, getRootProcId, getStackIndexes, getState, getSubmittedTime, getTimeout, getTimeoutTimestamp, hasChildren, hasException, hasLock, hasOwner, hasParent, hasTimeout, haveSameParent, holdLock, incChildrenLatch, isBypass, isFailed, isFinished, isInitializing, isLockedWhenLoading, isRunnable, isSuccess, isWaiting, releaseLock, removeStackIndex, setAbortFailure, setChildrenLatch, setFailure, setFailure, setLastUpdate, setNonceKey, setOwner, setOwner, setParentProcId, setProcId, setResult, setRootProcId, setStackIndexes, setState, setSubmittedTime, setTimeout, shouldWaitClientAck, skipPersistence, toString, toStringClass, toStringClassDetails, toStringDetails, toStringSimpleSB, updateMetricsOnFinish, updateMetricsOnSubmit, updateTimestamp, waitInitialized, wasExecuted

Methods inherited from class java.lang.Object

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

Constructor Detail

SplitWALProcedure

public SplitWALProcedure()

SplitWALProcedure

public SplitWALProcedure(String walPath,
                         ServerName crashedServer)

Method Detail

executeFromState

protected StateMachineProcedure.Flow executeFromState(MasterProcedureEnv env,
                                                      MasterProcedureProtos.SplitWALState state)
                                               throws ProcedureSuspendedException,
                                                      ProcedureYieldException,
                                                      InterruptedException

Specified by:

executeFromState in class StateMachineProcedure<MasterProcedureEnv,MasterProcedureProtos.SplitWALState>

Throws:

ProcedureSuspendedException

ProcedureYieldException

InterruptedException

rollbackState

protected void rollbackState(MasterProcedureEnv env,
                             MasterProcedureProtos.SplitWALState splitOneWalState)
                      throws IOException,
                             InterruptedException

Specified by:

rollbackState in class StateMachineProcedure<MasterProcedureEnv,MasterProcedureProtos.SplitWALState>

Throws:

IOException

InterruptedException

getState

protected MasterProcedureProtos.SplitWALState getState(int stateId)

Specified by:

getState in class StateMachineProcedure<MasterProcedureEnv,MasterProcedureProtos.SplitWALState>

getStateId

protected int getStateId(MasterProcedureProtos.SplitWALState state)

Specified by:

getStateId in class StateMachineProcedure<MasterProcedureEnv,MasterProcedureProtos.SplitWALState>

getInitialState

protected MasterProcedureProtos.SplitWALState getInitialState()

Specified by:

getInitialState in class StateMachineProcedure<MasterProcedureEnv,MasterProcedureProtos.SplitWALState>

serializeStateData

protected void serializeStateData(ProcedureStateSerializer serializer)
                           throws IOException

Overrides:

serializeStateData in class StateMachineProcedure<MasterProcedureEnv,MasterProcedureProtos.SplitWALState>

Throws:

IOException

deserializeStateData

protected void deserializeStateData(ProcedureStateSerializer serializer)
                             throws IOException

Overrides:

deserializeStateData in class StateMachineProcedure<MasterProcedureEnv,MasterProcedureProtos.SplitWALState>

Throws:

IOException

setTimeoutFailure

protected boolean setTimeoutFailure(MasterProcedureEnv env)

Overrides:

setTimeoutFailure in class Procedure<MasterProcedureEnv>

getWAL

public String getWAL()

getWorker

public ServerName getWorker()

getServerName

public ServerName getServerName()

Specified by:

getServerName in interface ServerProcedureInterface

Returns:

Name of this server instance.

hasMetaTableRegion

public boolean hasMetaTableRegion()

Specified by:

hasMetaTableRegion in interface ServerProcedureInterface

Returns:

True if this server has an hbase:meta table region.

getServerOperationType

public ServerProcedureInterface.ServerOperationType getServerOperationType()

Description copied from interface: ServerProcedureInterface

Given an operation type we can take decisions about what to do with pending operations. e.g. if we get a crash handler and we have some assignment operation pending we can abort those operations.

Specified by:

getServerOperationType in interface ServerProcedureInterface

Returns:

the operation type that the procedure is executing.

afterReplay

protected void afterReplay(MasterProcedureEnv env)

Overrides:

afterReplay in class Procedure<MasterProcedureEnv>