Apache9 commented on code in PR #5256: URL: https://github.com/apache/hbase/pull/5256#discussion_r1223164292
########## hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/FlushTableProcedure.java: ########## @@ -0,0 +1,178 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * 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, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package org.apache.hadoop.hbase.master.procedure; + +import java.io.IOException; +import org.apache.hadoop.hbase.TableName; +import org.apache.hadoop.hbase.client.RegionReplicaUtil; +import org.apache.hadoop.hbase.procedure.flush.MasterFlushTableProcedureManager; +import org.apache.hadoop.hbase.procedure2.ProcedureStateSerializer; +import org.apache.hadoop.hbase.procedure2.ProcedureSuspendedException; +import org.apache.hadoop.hbase.procedure2.ProcedureYieldException; +import org.apache.hadoop.hbase.util.Bytes; +import org.apache.yetus.audience.InterfaceAudience; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import org.apache.hbase.thirdparty.com.google.protobuf.UnsafeByteOperations; + +import org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil; +import org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.FlushTableProcedureStateData; +import org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.FlushTableState; + [email protected] +public class FlushTableProcedure extends AbstractStateMachineTableProcedure<FlushTableState> { + private static final Logger LOG = LoggerFactory.getLogger(FlushTableProcedure.class); + + private TableName tableName; + + private byte[] columnFamily; + + public FlushTableProcedure() { + super(); + } + + public FlushTableProcedure(MasterProcedureEnv env, TableName tableName) { + this(env, tableName, null); + } + + public FlushTableProcedure(MasterProcedureEnv env, TableName tableName, byte[] columnFamily) { + super(env); + this.tableName = tableName; + this.columnFamily = columnFamily; + } + + @Override + protected LockState acquireLock(MasterProcedureEnv env) { + // Here we don't acquire table lock because the flush operation and other operations (like + // split or merge) are not mutually exclusive. Region will flush memstore when being closed. + // It's safe even if we don't have lock. However, currently we are limited by the scheduling + // mechanism of the procedure scheduler and have to acquire table shared lock here. See + // HBASE-27905 for details. + if (env.getProcedureScheduler().waitTableSharedLock(this, getTableName())) { + return LockState.LOCK_EVENT_WAIT; + } + return LockState.LOCK_ACQUIRED; + } + + @Override + protected void releaseLock(MasterProcedureEnv env) { + env.getProcedureScheduler().wakeTableSharedLock(this, getTableName()); + } + + @Override + protected Flow executeFromState(MasterProcedureEnv env, FlushTableState state) + throws ProcedureSuspendedException, ProcedureYieldException, InterruptedException { + LOG.info("{} execute state={}", this, state); + + try { + switch (state) { + case FLUSH_TABLE_PREPARE: + preflightChecks(env, true); + setNextState(FlushTableState.FLUSH_TABLE_FLUSH_REGIONS); + return Flow.HAS_MORE_STATE; + case FLUSH_TABLE_FLUSH_REGIONS: + addChildProcedure(createFlushRegionProcedures(env)); + return Flow.NO_MORE_STATE; + default: + throw new UnsupportedOperationException("unhandled state=" + state); + } + } catch (Exception e) { + setFailure("master-flush-table", e); Review Comment: What could casue the procedure failure? Since we do not support rollback, I do not think we can mark this procedure as failure after entering the fllush regions state... -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
