org.apache.hadoop.hbase.master.procedure

Class ServerCrashProcedure

java.lang.Object

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

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

org.apache.hadoop.hbase.master.procedure.ServerCrashProcedure

All Implemented Interfaces:

Comparable<Procedure<MasterProcedureEnv>>, ServerProcedureInterface

@InterfaceAudience.Private
public class ServerCrashProcedure
extends StateMachineProcedure<MasterProcedureEnv,MasterProcedureProtos.ServerCrashState>
implements ServerProcedureInterface

Handle crashed server. This is a port to ProcedureV2 of what used to be euphemistically called ServerShutdownHandler.

The procedure flow varies dependent on whether meta is assigned and if we are to split logs.

We come in here after ServerManager has noticed a server has expired. Procedures queued on the rpc should have been notified about fail and should be concurrently getting themselves ready to assign elsewhere.

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
ServerCrashProcedure() Used when deserializing from a procedure store; we'll construct one of these then call #deserializeStateData(InputStream).
ServerCrashProcedure(MasterProcedureEnv env, ServerName serverName, boolean shouldSplitWal, boolean carryingMeta) Call this constructor queuing up a Procedure.

Method Summary

Modifier and Type	Method and Description
protected boolean	abort(MasterProcedureEnv env)
protected Procedure.LockState	acquireLock(MasterProcedureEnv env)
protected void	deserializeStateData(ProcedureStateSerializer serializer)
protected StateMachineProcedure.Flow	executeFromState(MasterProcedureEnv env, MasterProcedureProtos.ServerCrashState state)
protected MasterProcedureProtos.ServerCrashState	getInitialState()
protected ProcedureMetrics	getProcedureMetrics(MasterProcedureEnv env)
ServerName	getServerName()
ServerProcedureInterface.ServerOperationType	getServerOperationType() Given an operation type we can take decisions about what to do with pending operations.
protected MasterProcedureProtos.ServerCrashState	getState(int stateId)
protected int	getStateId(MasterProcedureProtos.ServerCrashState state)
boolean	hasMetaTableRegion()
protected boolean	isYieldBeforeExecuteFromState(MasterProcedureEnv env, MasterProcedureProtos.ServerCrashState state) For this procedure, yield at end of each successful flow step so that all crashed servers can make progress rather than do the default which has each procedure running to completion before we move to the next.
protected void	releaseLock(MasterProcedureEnv env)
protected void	rollbackState(MasterProcedureEnv env, MasterProcedureProtos.ServerCrashState state)
protected void	serializeStateData(ProcedureStateSerializer serializer)
protected boolean	shouldWaitClientAck(MasterProcedureEnv env)
void	toStringClassDetails(StringBuilder sb)

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

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

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

addStackIndex, afterReplay, beforeReplay, bypass, compareTo, completionCleanup, doExecute, doRollback, elapsedTime, getChildrenLatch, getException, getLastUpdate, getNonceKey, getOwner, getParentProcId, 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, removeStackIndex, setAbortFailure, setChildrenLatch, setFailure, setFailure, setLastUpdate, setNonceKey, setOwner, setOwner, setParentProcId, setProcId, setResult, setRootProcId, setStackIndexes, setState, setSubmittedTime, setTimeout, setTimeoutFailure, skipPersistence, toString, toStringClass, 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

ServerCrashProcedure

public ServerCrashProcedure(MasterProcedureEnv env,
                            ServerName serverName,
                            boolean shouldSplitWal,
                            boolean carryingMeta)

Call this constructor queuing up a Procedure.

Parameters:

serverName - Name of the crashed server.

shouldSplitWal - True if we should split WALs as part of crashed server processing.

carryingMeta - True if carrying hbase:meta table region.

ServerCrashProcedure

public ServerCrashProcedure()

Used when deserializing from a procedure store; we'll construct one of these then call #deserializeStateData(InputStream). Do not use directly.

Method Detail

executeFromState

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

Specified by:

executeFromState in class StateMachineProcedure<MasterProcedureEnv,MasterProcedureProtos.ServerCrashState>

Throws:

ProcedureSuspendedException

ProcedureYieldException

rollbackState

protected void rollbackState(MasterProcedureEnv env,
                             MasterProcedureProtos.ServerCrashState state)
                      throws IOException

Specified by:

rollbackState in class StateMachineProcedure<MasterProcedureEnv,MasterProcedureProtos.ServerCrashState>

Throws:

IOException

getState

protected MasterProcedureProtos.ServerCrashState getState(int stateId)

Specified by:

getState in class StateMachineProcedure<MasterProcedureEnv,MasterProcedureProtos.ServerCrashState>

getStateId

protected int getStateId(MasterProcedureProtos.ServerCrashState state)

Specified by:

getStateId in class StateMachineProcedure<MasterProcedureEnv,MasterProcedureProtos.ServerCrashState>

getInitialState

protected MasterProcedureProtos.ServerCrashState getInitialState()

Specified by:

getInitialState in class StateMachineProcedure<MasterProcedureEnv,MasterProcedureProtos.ServerCrashState>

abort

protected boolean abort(MasterProcedureEnv env)

Overrides:

abort in class StateMachineProcedure<MasterProcedureEnv,MasterProcedureProtos.ServerCrashState>

acquireLock

protected Procedure.LockState acquireLock(MasterProcedureEnv env)

Overrides:

acquireLock in class Procedure<MasterProcedureEnv>

releaseLock

protected void releaseLock(MasterProcedureEnv env)

Overrides:

releaseLock in class Procedure<MasterProcedureEnv>

toStringClassDetails

public void toStringClassDetails(StringBuilder sb)

Overrides:

toStringClassDetails in class Procedure<MasterProcedureEnv>

serializeStateData

protected void serializeStateData(ProcedureStateSerializer serializer)
                           throws IOException

Overrides:

serializeStateData in class StateMachineProcedure<MasterProcedureEnv,MasterProcedureProtos.ServerCrashState>

Throws:

IOException

deserializeStateData

protected void deserializeStateData(ProcedureStateSerializer serializer)
                             throws IOException

Overrides:

deserializeStateData in class StateMachineProcedure<MasterProcedureEnv,MasterProcedureProtos.ServerCrashState>

Throws:

IOException

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.

isYieldBeforeExecuteFromState

protected boolean isYieldBeforeExecuteFromState(MasterProcedureEnv env,
                                                MasterProcedureProtos.ServerCrashState state)

For this procedure, yield at end of each successful flow step so that all crashed servers can make progress rather than do the default which has each procedure running to completion before we move to the next. For crashed servers, especially if running with distributed log replay, we will want all servers to come along; we do not want the scenario where a server is stuck waiting for regions to online so it can replay edits.

Overrides:

isYieldBeforeExecuteFromState in class StateMachineProcedure<MasterProcedureEnv,MasterProcedureProtos.ServerCrashState>

shouldWaitClientAck

protected boolean shouldWaitClientAck(MasterProcedureEnv env)

Overrides:

shouldWaitClientAck in class Procedure<MasterProcedureEnv>

getProcedureMetrics

protected ProcedureMetrics getProcedureMetrics(MasterProcedureEnv env)

Overrides:

getProcedureMetrics in class Procedure<MasterProcedureEnv>