| /* |
| * 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 java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.List; |
| import org.apache.hadoop.hbase.HBaseIOException; |
| import org.apache.hadoop.hbase.TableName; |
| import org.apache.hadoop.hbase.TableNotDisabledException; |
| import org.apache.hadoop.hbase.TableNotFoundException; |
| import org.apache.hadoop.hbase.client.RegionInfo; |
| import org.apache.hadoop.hbase.client.RegionInfoBuilder; |
| import org.apache.hadoop.hbase.client.RegionReplicaUtil; |
| import org.apache.hadoop.hbase.client.TableDescriptor; |
| import org.apache.hadoop.hbase.master.MasterCoprocessorHost; |
| import org.apache.hadoop.hbase.procedure2.ProcedureStateSerializer; |
| import org.apache.hadoop.hbase.util.ModifyRegionUtils; |
| import org.apache.yetus.audience.InterfaceAudience; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil; |
| import org.apache.hadoop.hbase.shaded.protobuf.generated.HBaseProtos; |
| import org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos; |
| import org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.TruncateTableState; |
| |
| @InterfaceAudience.Private |
| public class TruncateTableProcedure |
| extends AbstractStateMachineTableProcedure<TruncateTableState> { |
| private static final Logger LOG = LoggerFactory.getLogger(TruncateTableProcedure.class); |
| |
| private boolean preserveSplits; |
| private List<RegionInfo> regions; |
| private TableDescriptor tableDescriptor; |
| private TableName tableName; |
| |
| public TruncateTableProcedure() { |
| // Required by the Procedure framework to create the procedure on replay |
| super(); |
| } |
| |
| public TruncateTableProcedure(final MasterProcedureEnv env, final TableName tableName, |
| boolean preserveSplits) |
| throws HBaseIOException { |
| this(env, tableName, preserveSplits, null); |
| } |
| |
| public TruncateTableProcedure(final MasterProcedureEnv env, final TableName tableName, |
| boolean preserveSplits, ProcedurePrepareLatch latch) |
| throws HBaseIOException { |
| super(env, latch); |
| this.tableName = tableName; |
| preflightChecks(env, false); |
| this.preserveSplits = preserveSplits; |
| } |
| |
| @Override |
| protected Flow executeFromState(final MasterProcedureEnv env, TruncateTableState state) |
| throws InterruptedException { |
| if (LOG.isTraceEnabled()) { |
| LOG.trace(this + " execute state=" + state); |
| } |
| try { |
| switch (state) { |
| case TRUNCATE_TABLE_PRE_OPERATION: |
| // Verify if we can truncate the table |
| if (!prepareTruncate(env)) { |
| assert isFailed() : "the truncate should have an exception here"; |
| return Flow.NO_MORE_STATE; |
| } |
| |
| // TODO: Move out... in the acquireLock() |
| LOG.debug("waiting for '" + getTableName() + "' regions in transition"); |
| regions = env.getAssignmentManager().getRegionStates().getRegionsOfTable(getTableName()); |
| RegionReplicaUtil.removeNonDefaultRegions(regions); |
| assert regions != null && !regions.isEmpty() : "unexpected 0 regions"; |
| ProcedureSyncWait.waitRegionInTransition(env, regions); |
| |
| // Call coprocessors |
| preTruncate(env); |
| |
| //We need to cache table descriptor in the initial stage, so that it's saved within |
| //the procedure stage and can get recovered if the procedure crashes between |
| //TRUNCATE_TABLE_REMOVE_FROM_META and TRUNCATE_TABLE_CREATE_FS_LAYOUT |
| tableDescriptor = env.getMasterServices().getTableDescriptors().get(tableName); |
| setNextState(TruncateTableState.TRUNCATE_TABLE_CLEAR_FS_LAYOUT); |
| break; |
| case TRUNCATE_TABLE_CLEAR_FS_LAYOUT: |
| DeleteTableProcedure.deleteFromFs(env, getTableName(), regions, true); |
| // NOTE: It's very important that we create new HRegions before next state, so that |
| // they get persisted in procedure state before we start using them for anything. |
| // Otherwise, if we create them in next step and master crashes after creating fs |
| // layout but before saving state, region re-created after recovery will have different |
| // regionId(s) and encoded names. That will lead to unwanted regions in FS layout |
| // (which were created before the crash). |
| if (!preserveSplits) { |
| // if we are not preserving splits, generate a new single region |
| regions = Arrays.asList(ModifyRegionUtils.createRegionInfos(tableDescriptor, null)); |
| } else { |
| regions = recreateRegionInfo(regions); |
| } |
| setNextState(TruncateTableState.TRUNCATE_TABLE_REMOVE_FROM_META); |
| break; |
| case TRUNCATE_TABLE_REMOVE_FROM_META: |
| List<RegionInfo> originalRegions = env.getAssignmentManager() |
| .getRegionStates().getRegionsOfTable(getTableName()); |
| DeleteTableProcedure.deleteFromMeta(env, getTableName(), originalRegions); |
| DeleteTableProcedure.deleteAssignmentState(env, getTableName()); |
| setNextState(TruncateTableState.TRUNCATE_TABLE_CREATE_FS_LAYOUT); |
| break; |
| case TRUNCATE_TABLE_CREATE_FS_LAYOUT: |
| DeleteTableProcedure.deleteFromFs(env, getTableName(), regions, true); |
| regions = CreateTableProcedure.createFsLayout(env, tableDescriptor, regions); |
| env.getMasterServices().getTableDescriptors().update(tableDescriptor, true); |
| setNextState(TruncateTableState.TRUNCATE_TABLE_ADD_TO_META); |
| break; |
| case TRUNCATE_TABLE_ADD_TO_META: |
| regions = CreateTableProcedure.addTableToMeta(env, tableDescriptor, regions); |
| setNextState(TruncateTableState.TRUNCATE_TABLE_ASSIGN_REGIONS); |
| break; |
| case TRUNCATE_TABLE_ASSIGN_REGIONS: |
| CreateTableProcedure.setEnablingState(env, getTableName()); |
| addChildProcedure(env.getAssignmentManager().createRoundRobinAssignProcedures(regions)); |
| setNextState(TruncateTableState.TRUNCATE_TABLE_POST_OPERATION); |
| tableDescriptor = null; |
| regions = null; |
| break; |
| case TRUNCATE_TABLE_POST_OPERATION: |
| CreateTableProcedure.setEnabledState(env, getTableName()); |
| postTruncate(env); |
| LOG.debug("truncate '" + getTableName() + "' completed"); |
| return Flow.NO_MORE_STATE; |
| default: |
| throw new UnsupportedOperationException("unhandled state=" + state); |
| } |
| } catch (IOException e) { |
| if (isRollbackSupported(state)) { |
| setFailure("master-truncate-table", e); |
| } else { |
| LOG.warn("Retriable error trying to truncate table=" + getTableName() |
| + " state=" + state, e); |
| } |
| } |
| return Flow.HAS_MORE_STATE; |
| } |
| |
| @Override |
| protected void rollbackState(final MasterProcedureEnv env, final TruncateTableState state) { |
| if (state == TruncateTableState.TRUNCATE_TABLE_PRE_OPERATION) { |
| // nothing to rollback, pre-truncate is just table-state checks. |
| // We can fail if the table does not exist or is not disabled. |
| // TODO: coprocessor rollback semantic is still undefined. |
| return; |
| } |
| |
| // The truncate doesn't have a rollback. The execution will succeed, at some point. |
| throw new UnsupportedOperationException("unhandled state=" + state); |
| } |
| |
| @Override |
| protected void completionCleanup(final MasterProcedureEnv env) { |
| releaseSyncLatch(); |
| } |
| |
| @Override |
| protected boolean isRollbackSupported(final TruncateTableState state) { |
| switch (state) { |
| case TRUNCATE_TABLE_PRE_OPERATION: |
| return true; |
| default: |
| return false; |
| } |
| } |
| |
| @Override |
| protected TruncateTableState getState(final int stateId) { |
| return TruncateTableState.forNumber(stateId); |
| } |
| |
| @Override |
| protected int getStateId(final TruncateTableState state) { |
| return state.getNumber(); |
| } |
| |
| @Override |
| protected TruncateTableState getInitialState() { |
| return TruncateTableState.TRUNCATE_TABLE_PRE_OPERATION; |
| } |
| |
| @Override |
| protected boolean holdLock(MasterProcedureEnv env) { |
| return true; |
| } |
| |
| @Override |
| public TableName getTableName() { |
| return tableName; |
| } |
| |
| @Override |
| public TableOperationType getTableOperationType() { |
| return TableOperationType.EDIT; |
| } |
| |
| @Override |
| public void toStringClassDetails(StringBuilder sb) { |
| sb.append(getClass().getSimpleName()); |
| sb.append(" (table="); |
| sb.append(getTableName()); |
| sb.append(" preserveSplits="); |
| sb.append(preserveSplits); |
| sb.append(")"); |
| } |
| |
| @Override |
| protected void serializeStateData(ProcedureStateSerializer serializer) |
| throws IOException { |
| super.serializeStateData(serializer); |
| |
| MasterProcedureProtos.TruncateTableStateData.Builder state = |
| MasterProcedureProtos.TruncateTableStateData.newBuilder() |
| .setUserInfo(MasterProcedureUtil.toProtoUserInfo(getUser())) |
| .setPreserveSplits(preserveSplits); |
| if (tableDescriptor != null) { |
| state.setTableSchema(ProtobufUtil.toTableSchema(tableDescriptor)); |
| } else { |
| state.setTableName(ProtobufUtil.toProtoTableName(tableName)); |
| } |
| if (regions != null) { |
| for (RegionInfo hri: regions) { |
| state.addRegionInfo(ProtobufUtil.toRegionInfo(hri)); |
| } |
| } |
| serializer.serialize(state.build()); |
| } |
| |
| @Override |
| protected void deserializeStateData(ProcedureStateSerializer serializer) |
| throws IOException { |
| super.deserializeStateData(serializer); |
| |
| MasterProcedureProtos.TruncateTableStateData state = |
| serializer.deserialize(MasterProcedureProtos.TruncateTableStateData.class); |
| setUser(MasterProcedureUtil.toUserInfo(state.getUserInfo())); |
| if (state.hasTableSchema()) { |
| tableDescriptor = ProtobufUtil.toTableDescriptor(state.getTableSchema()); |
| tableName = tableDescriptor.getTableName(); |
| } else { |
| tableName = ProtobufUtil.toTableName(state.getTableName()); |
| } |
| preserveSplits = state.getPreserveSplits(); |
| if (state.getRegionInfoCount() == 0) { |
| regions = null; |
| } else { |
| regions = new ArrayList<>(state.getRegionInfoCount()); |
| for (HBaseProtos.RegionInfo hri: state.getRegionInfoList()) { |
| regions.add(ProtobufUtil.toRegionInfo(hri)); |
| } |
| } |
| } |
| |
| private static List<RegionInfo> recreateRegionInfo(final List<RegionInfo> regions) { |
| ArrayList<RegionInfo> newRegions = new ArrayList<>(regions.size()); |
| for (RegionInfo hri: regions) { |
| newRegions.add(RegionInfoBuilder.newBuilder(hri.getTable()) |
| .setStartKey(hri.getStartKey()) |
| .setEndKey(hri.getEndKey()) |
| .build()); |
| } |
| return newRegions; |
| } |
| |
| private boolean prepareTruncate(final MasterProcedureEnv env) throws IOException { |
| try { |
| env.getMasterServices().checkTableModifiable(getTableName()); |
| } catch (TableNotFoundException|TableNotDisabledException e) { |
| setFailure("master-truncate-table", e); |
| return false; |
| } |
| return true; |
| } |
| |
| private boolean preTruncate(final MasterProcedureEnv env) |
| throws IOException, InterruptedException { |
| final MasterCoprocessorHost cpHost = env.getMasterCoprocessorHost(); |
| if (cpHost != null) { |
| final TableName tableName = getTableName(); |
| cpHost.preTruncateTableAction(tableName, getUser()); |
| } |
| return true; |
| } |
| |
| private void postTruncate(final MasterProcedureEnv env) |
| throws IOException, InterruptedException { |
| final MasterCoprocessorHost cpHost = env.getMasterCoprocessorHost(); |
| if (cpHost != null) { |
| final TableName tableName = getTableName(); |
| cpHost.postCompletedTruncateTableAction(tableName, getUser()); |
| } |
| } |
| |
| RegionInfo getFirstRegionInfo() { |
| if (regions == null || regions.isEmpty()) { |
| return null; |
| } |
| return regions.get(0); |
| } |
| } |