Class GCMultipleMergedRegionsProcedure
java.lang.Object
org.apache.hadoop.hbase.procedure2.Procedure<TEnvironment>
org.apache.hadoop.hbase.procedure2.StateMachineProcedure<MasterProcedureEnv,TState>
org.apache.hadoop.hbase.master.procedure.AbstractStateMachineTableProcedure<org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.GCMergedRegionsState>
org.apache.hadoop.hbase.master.assignment.GCMultipleMergedRegionsProcedure
- All Implemented Interfaces:
Comparable<Procedure<MasterProcedureEnv>>
,TableProcedureInterface
@Private
public class GCMultipleMergedRegionsProcedure
extends AbstractStateMachineTableProcedure<org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.GCMergedRegionsState>
GC regions that have been Merged. Caller determines if it is GC time. This Procedure does not
check. This is a Table Procedure. We take a read lock on the Table. We do NOT keep a lock for the
life of this procedure. The sub-procedures take locks on the Regions they are purging. Replaces a
Procedure that did two regions only at a time instead doing multiple merges in the one go; only
difference from the old
MasterProcedureProtos.GCMergedRegionsState
is the serialization; this class has a
different serialization profile writing out more than just two regions.-
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.TableProcedureInterface
TableProcedureInterface.TableOperationType
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Field Summary
Modifier and TypeFieldDescriptionprivate static final org.slf4j.Logger
private RegionInfo
private List<RegionInfo>
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
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Constructor Summary
ConstructorDescriptionGCMultipleMergedRegionsProcedure
(MasterProcedureEnv env, RegionInfo mergedChild, List<RegionInfo> parents) -
Method Summary
Modifier and TypeMethodDescriptionprotected Procedure.LockState
The user should override this method if they need a lock on an Entity.private GCRegionProcedure[]
protected void
deserializeStateData
(ProcedureStateSerializer serializer) Called on store load to allow the user to decode the previously serialized state.protected StateMachineProcedure.Flow
executeFromState
(MasterProcedureEnv env, org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.GCMergedRegionsState state) called to perform a single step of the specified 'state' of the procedureprotected org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.GCMergedRegionsState
Return the initial state object that will be used for the first call to executeFromState().protected org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.GCMergedRegionsState
getState
(int stateId) Convert an ordinal (or state id) to an Enum (or more descriptive) state object.protected int
getStateId
(org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.GCMergedRegionsState state) Convert the Enum (or more descriptive) state object to an ordinal (or state id).Returns the name of the table the procedure is operating onGiven an operation type we can take decisions about what to do with pending operations.protected boolean
Used to keep the procedure lock even when the procedure is yielding or suspended.protected void
The user should override this method, and release lock if necessary.protected void
rollbackState
(MasterProcedureEnv env, org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.GCMergedRegionsState state) called to perform the rollback of the specified stateprotected void
serializeStateData
(ProcedureStateSerializer serializer) The user-level code of the procedure may have some state to persist (e.g.void
Extend the toString() information with the procedure details e.g.Methods inherited from class org.apache.hadoop.hbase.master.procedure.AbstractStateMachineTableProcedure
checkOnline, checkTableModifiable, getUser, getWALRegionDir, isTableEnabled, preflightChecks, releaseSyncLatch, setUser, waitInitialized
Methods inherited from class org.apache.hadoop.hbase.procedure2.StateMachineProcedure
abort, addChildProcedure, execute, failIfAborted, getCurrentState, getCurrentStateId, getCycles, isEofState, isRollbackSupported, isRollbackSupported, isYieldAfterExecutionStep, isYieldBeforeExecuteFromState, 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, getProcedureMetrics, getProcId, getProcIdHashCode, getProcName, getResult, getRootProcedureId, getRootProcId, getStackIndexes, getState, getSubmittedTime, getTimeout, getTimeoutTimestamp, hasChildren, hasException, hasLock, hasOwner, hasParent, hasTimeout, haveSameParent, incChildrenLatch, isBypass, isFailed, isFinished, isInitializing, isLockedWhenLoading, isRunnable, isSuccess, isWaiting, removeStackIndex, setAbortFailure, setChildrenLatch, setExecuted, setFailure, setFailure, setLastUpdate, setNonceKey, setOwner, setOwner, setParentProcId, setProcId, setResult, setRootProcId, setStackIndexes, setState, setSubmittedTime, setTimeout, setTimeoutFailure, shouldWaitClientAck, skipPersistence, suspend, toString, toStringClass, toStringDetails, toStringSimpleSB, updateMetricsOnFinish, updateMetricsOnSubmit, updateTimestamp, wasExecuted
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Field Details
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LOG
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parents
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mergedChild
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Constructor Details
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GCMultipleMergedRegionsProcedure
public GCMultipleMergedRegionsProcedure(MasterProcedureEnv env, RegionInfo mergedChild, List<RegionInfo> parents) -
GCMultipleMergedRegionsProcedure
public GCMultipleMergedRegionsProcedure()
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Method Details
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holdLock
Description copied from class:Procedure
Used to keep the procedure lock even when the procedure is yielding or suspended.- Overrides:
holdLock
in classProcedure<MasterProcedureEnv>
- Returns:
- true if the procedure should hold on the lock until completionCleanup()
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acquireLock
Description copied from class:Procedure
The user should override this method if they need a lock on an Entity. A lock can be anything, and it is up to the implementor. The Procedure Framework will call this method just before it invokesProcedure.execute(Object)
. It callsProcedure.releaseLock(Object)
after the call to execute. If you need to hold the lock for the life of the Procedure -- i.e. you do not want any other Procedure interfering while this Procedure is running, seeProcedure.holdLock(Object)
. Example: in our Master we can execute request in parallel for different tables. We can create t1 and create t2 and these creates can be executed at the same time. Anything else on t1/t2 is queued waiting that specific table create to happen. There are 3 LockState:- LOCK_ACQUIRED should be returned when the proc has the lock and the proc is ready to execute.
- LOCK_YIELD_WAIT should be returned when the proc has not the lock and the framework should take care of readding the procedure back to the runnable set for retry
- LOCK_EVENT_WAIT should be returned when the proc has not the lock and someone will take care of readding the procedure back to the runnable set when the lock is available.
- Overrides:
acquireLock
in classAbstractStateMachineTableProcedure<org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.GCMergedRegionsState>
- Returns:
- the lock state as described above.
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releaseLock
Description copied from class:Procedure
The user should override this method, and release lock if necessary.- Overrides:
releaseLock
in classAbstractStateMachineTableProcedure<org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.GCMergedRegionsState>
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getTableOperationType
Description copied from interface:TableProcedureInterface
Given an operation type we can take decisions about what to do with pending operations. e.g. if we get a delete and we have some table operation pending (e.g. add column) we can abort those operations.- Specified by:
getTableOperationType
in interfaceTableProcedureInterface
- Specified by:
getTableOperationType
in classAbstractStateMachineTableProcedure<org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.GCMergedRegionsState>
- Returns:
- the operation type that the procedure is executing.
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executeFromState
protected StateMachineProcedure.Flow executeFromState(MasterProcedureEnv env, org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.GCMergedRegionsState state) throws ProcedureSuspendedException, ProcedureYieldException, InterruptedException Description copied from class:StateMachineProcedure
called to perform a single step of the specified 'state' of the procedure- Specified by:
executeFromState
in classStateMachineProcedure<MasterProcedureEnv,
org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.GCMergedRegionsState> state
- state to execute- Returns:
- Flow.NO_MORE_STATE if the procedure is completed, Flow.HAS_MORE_STATE if there is another step.
- Throws:
ProcedureSuspendedException
ProcedureYieldException
InterruptedException
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createGCRegionProcedures
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rollbackState
protected void rollbackState(MasterProcedureEnv env, org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.GCMergedRegionsState state) throws IOException, InterruptedException Description copied from class:StateMachineProcedure
called to perform the rollback of the specified state- Specified by:
rollbackState
in classStateMachineProcedure<MasterProcedureEnv,
org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.GCMergedRegionsState> state
- state to rollback- Throws:
IOException
- temporary failure, the rollback will retry laterInterruptedException
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getState
protected org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.GCMergedRegionsState getState(int stateId) Description copied from class:StateMachineProcedure
Convert an ordinal (or state id) to an Enum (or more descriptive) state object.- Specified by:
getState
in classStateMachineProcedure<MasterProcedureEnv,
org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.GCMergedRegionsState> - Parameters:
stateId
- the ordinal() of the state enum (or state id)- Returns:
- the state enum object
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getStateId
protected int getStateId(org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.GCMergedRegionsState state) Description copied from class:StateMachineProcedure
Convert the Enum (or more descriptive) state object to an ordinal (or state id).- Specified by:
getStateId
in classStateMachineProcedure<MasterProcedureEnv,
org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.GCMergedRegionsState> - Parameters:
state
- the state enum object- Returns:
- stateId the ordinal() of the state enum (or state id)
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getInitialState
protected org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.GCMergedRegionsState getInitialState()Description copied from class:StateMachineProcedure
Return the initial state object that will be used for the first call to executeFromState().- Specified by:
getInitialState
in classStateMachineProcedure<MasterProcedureEnv,
org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.GCMergedRegionsState> - Returns:
- the initial state enum object
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serializeStateData
Description copied from class:Procedure
The user-level code of the procedure may have some state to persist (e.g. input arguments or current position in the processing state) to be able to resume on failure.- Overrides:
serializeStateData
in classStateMachineProcedure<MasterProcedureEnv,
org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.GCMergedRegionsState> - Parameters:
serializer
- stores the serializable state- Throws:
IOException
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deserializeStateData
Description copied from class:Procedure
Called on store load to allow the user to decode the previously serialized state.- Overrides:
deserializeStateData
in classStateMachineProcedure<MasterProcedureEnv,
org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.GCMergedRegionsState> - Parameters:
serializer
- contains the serialized state- Throws:
IOException
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toStringClassDetails
Description copied from class:Procedure
Extend the toString() information with the procedure details e.g. className and parameters- Overrides:
toStringClassDetails
in classAbstractStateMachineTableProcedure<org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.GCMergedRegionsState>
- Parameters:
sb
- the string builder to use to append the proc specific information
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getTableName
Description copied from interface:TableProcedureInterface
Returns the name of the table the procedure is operating on- Specified by:
getTableName
in interfaceTableProcedureInterface
- Specified by:
getTableName
in classAbstractStateMachineTableProcedure<org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.GCMergedRegionsState>
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