org.apache.hudi.org.apache.hadoop.hbase.regionserver.SplitWALCallable Maven / Gradle / Ivy
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* distributed with this work for additional information
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* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
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* See the License for the specific language governing permissions and
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*/
package org.apache.hadoop.hbase.regionserver;
import java.util.concurrent.locks.Lock;
import org.apache.hadoop.hbase.HBaseIOException;
import org.apache.hadoop.hbase.executor.EventType;
import org.apache.hadoop.hbase.procedure2.RSProcedureCallable;
import org.apache.hadoop.hbase.util.KeyLocker;
import org.apache.yetus.audience.InterfaceAudience;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.hbase.thirdparty.com.google.protobuf.InvalidProtocolBufferException;
import org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos;
/**
* This callable is used to do the real split WAL task. It is called by
* {@link org.apache.hadoop.hbase.master.procedure.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
* {@link org.apache.hadoop.hbase.master.procedure.SplitWALRemoteProcedure} to handle this problem.
*
* This class is to replace the zk-based WAL splitting related code, {@link SplitLogWorker},
* {@link org.apache.hadoop.hbase.coordination.SplitLogWorkerCoordination} and
* {@link org.apache.hadoop.hbase.coordination.ZkSplitLogWorkerCoordination} can be removed after
* we switch to procedure-based WAL splitting.
*/
@InterfaceAudience.Private
public class SplitWALCallable implements RSProcedureCallable {
private static final Logger LOG = LoggerFactory.getLogger(SplitWALCallable.class);
private String walPath;
private Exception initError;
private HRegionServer rs;
private final KeyLocker splitWALLocks = new KeyLocker<>();
private volatile Lock splitWALLock = null;
@Override
public void init(byte[] parameter, HRegionServer rs) {
try {
this.rs = rs;
MasterProcedureProtos.SplitWALParameter param =
MasterProcedureProtos.SplitWALParameter.parseFrom(parameter);
this.walPath = param.getWalPath();
} catch (InvalidProtocolBufferException e) {
LOG.error("Parse proto buffer of split WAL request failed ", e);
initError = e;
}
}
@Override
public EventType getEventType() {
return EventType.RS_LOG_REPLAY;
}
public static class PreemptedWALSplitException extends HBaseIOException {
PreemptedWALSplitException(String wal) {
super(wal);
}
}
public static class ResignedWALSplitException extends HBaseIOException {
ResignedWALSplitException(String wal) {
super(wal);
}
}
public static class ErrorWALSplitException extends HBaseIOException {
ErrorWALSplitException(String wal) {
super(wal);
}
}
@Override
public Void call() throws Exception {
if (initError != null) {
throw initError;
}
//grab a lock
splitWALLock = splitWALLocks.acquireLock(walPath);
try {
switch (SplitLogWorker.splitLog(walPath, null, rs.getConfiguration(), rs, rs, rs.getWalFactory())) {
case DONE:
break;
case PREEMPTED:
throw new PreemptedWALSplitException(this.walPath);
case RESIGNED:
throw new ResignedWALSplitException(this.walPath);
default:
throw new ErrorWALSplitException(this.walPath);
}
} finally {
splitWALLock.unlock();
}
return null;
}
public String getWalPath() {
return this.walPath;
}
}