Package org.apache.hadoop.hbase.regionserver

Class SplitWALCallable

java.lang.Object
org.apache.hadoop.hbase.procedure2.BaseRSProcedureCallable
org.apache.hadoop.hbase.regionserver.SplitWALCallable
All Implemented Interfaces:
Callable<Void>, RSProcedureCallable
@Private public class SplitWALCallable extends BaseRSProcedureCallable
This callable is used to do the real split WAL task. It is called by SplitWALRemoteProcedure from master and executed by executor service which is in charge of executing the events of EventType.RS_LOG_REPLAY When execute this callable, it will call SplitLogWorker.splitLog() to split the WAL. If the return value is SplitLogWorker.TaskExecutor.Status.DONE, it means the task is successful and it will return null to end the call. Otherwise it will throw an exception and let SplitWALRemoteProcedure to handle this problem. This class is to replace the zk-based WAL splitting related code, SplitLogWorker, SplitLogWorkerCoordination and ZkSplitLogWorkerCoordination can be removed after we switch to procedure-based WAL splitting.