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,org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.ServerCrashState>

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

All Implemented Interfaces:

Comparable<org.apache.hadoop.hbase.procedure2.Procedure<MasterProcedureEnv>>, ServerProcedureInterface

@InterfaceAudience.Private
public class ServerCrashProcedure
extends org.apache.hadoop.hbase.procedure2.StateMachineProcedure<MasterProcedureEnv,org.apache.hadoop.hbase.shaded.protobuf.generated.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

org.apache.hadoop.hbase.procedure2.StateMachineProcedure.Flow

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

org.apache.hadoop.hbase.procedure2.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, org.apache.hadoop.hbase.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 org.apache.hadoop.hbase.procedure2.Procedure.LockState	acquireLock(MasterProcedureEnv env)
protected void	deserializeStateData(org.apache.hadoop.hbase.procedure2.ProcedureStateSerializer serializer)
protected org.apache.hadoop.hbase.procedure2.StateMachineProcedure.Flow	executeFromState(MasterProcedureEnv env, org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.ServerCrashState state)
protected org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.ServerCrashState	getInitialState()
protected org.apache.hadoop.hbase.procedure2.ProcedureMetrics	getProcedureMetrics(MasterProcedureEnv env)
org.apache.hadoop.hbase.ServerName	getServerName()
ServerProcedureInterface.ServerOperationType	getServerOperationType() Given an operation type we can take decisions about what to do with pending operations.
protected org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.ServerCrashState	getState(int stateId)
protected int	getStateId(org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.ServerCrashState state)
boolean	hasMetaTableRegion()
protected boolean	isYieldBeforeExecuteFromState(MasterProcedureEnv env, org.apache.hadoop.hbase.shaded.protobuf.generated.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, org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.ServerCrashState state)
protected void	serializeStateData(org.apache.hadoop.hbase.procedure2.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,
                            org.apache.hadoop.hbase.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 org.apache.hadoop.hbase.procedure2.StateMachineProcedure.Flow executeFromState(MasterProcedureEnv env,
                                                                                         org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.ServerCrashState state)
                                                                                  throws org.apache.hadoop.hbase.procedure2.ProcedureSuspendedException,
                                                                                         org.apache.hadoop.hbase.procedure2.ProcedureYieldException

Specified by:

executeFromState in class org.apache.hadoop.hbase.procedure2.StateMachineProcedure<MasterProcedureEnv,org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.ServerCrashState>

Throws:

org.apache.hadoop.hbase.procedure2.ProcedureSuspendedException

org.apache.hadoop.hbase.procedure2.ProcedureYieldException

rollbackState

protected void rollbackState(MasterProcedureEnv env,
                             org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.ServerCrashState state)
                      throws IOException

Specified by:

rollbackState in class org.apache.hadoop.hbase.procedure2.StateMachineProcedure<MasterProcedureEnv,org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.ServerCrashState>

Throws:

IOException

getState

protected org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.ServerCrashState getState(int stateId)

Specified by:

getState in class org.apache.hadoop.hbase.procedure2.StateMachineProcedure<MasterProcedureEnv,org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.ServerCrashState>

getStateId

protected int getStateId(org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.ServerCrashState state)

Specified by:

getStateId in class org.apache.hadoop.hbase.procedure2.StateMachineProcedure<MasterProcedureEnv,org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.ServerCrashState>

getInitialState

protected org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.ServerCrashState getInitialState()

Specified by:

getInitialState in class org.apache.hadoop.hbase.procedure2.StateMachineProcedure<MasterProcedureEnv,org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.ServerCrashState>

abort

protected boolean abort(MasterProcedureEnv env)

Overrides:

abort in class org.apache.hadoop.hbase.procedure2.StateMachineProcedure<MasterProcedureEnv,org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.ServerCrashState>

acquireLock

protected org.apache.hadoop.hbase.procedure2.Procedure.LockState acquireLock(MasterProcedureEnv env)

Overrides:

acquireLock in class org.apache.hadoop.hbase.procedure2.Procedure<MasterProcedureEnv>

releaseLock

protected void releaseLock(MasterProcedureEnv env)

Overrides:

releaseLock in class org.apache.hadoop.hbase.procedure2.Procedure<MasterProcedureEnv>

toStringClassDetails

public void toStringClassDetails(StringBuilder sb)

Overrides:

toStringClassDetails in class org.apache.hadoop.hbase.procedure2.Procedure<MasterProcedureEnv>

serializeStateData

protected void serializeStateData(org.apache.hadoop.hbase.procedure2.ProcedureStateSerializer serializer)
                           throws IOException

Overrides:

serializeStateData in class org.apache.hadoop.hbase.procedure2.StateMachineProcedure<MasterProcedureEnv,org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.ServerCrashState>

Throws:

IOException

deserializeStateData

protected void deserializeStateData(org.apache.hadoop.hbase.procedure2.ProcedureStateSerializer serializer)
                             throws IOException

Overrides:

deserializeStateData in class org.apache.hadoop.hbase.procedure2.StateMachineProcedure<MasterProcedureEnv,org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.ServerCrashState>

Throws:

IOException

getServerName

public org.apache.hadoop.hbase.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,
                                                org.apache.hadoop.hbase.shaded.protobuf.generated.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 org.apache.hadoop.hbase.procedure2.StateMachineProcedure<MasterProcedureEnv,org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.ServerCrashState>

shouldWaitClientAck

protected boolean shouldWaitClientAck(MasterProcedureEnv env)

Overrides:

shouldWaitClientAck in class org.apache.hadoop.hbase.procedure2.Procedure<MasterProcedureEnv>

getProcedureMetrics

protected org.apache.hadoop.hbase.procedure2.ProcedureMetrics getProcedureMetrics(MasterProcedureEnv env)

Overrides:

getProcedureMetrics in class org.apache.hadoop.hbase.procedure2.Procedure<MasterProcedureEnv>