xy720 commented on a change in pull request #3191: DeleteV2 URL: https://github.com/apache/incubator-doris/pull/3191#discussion_r406809237
########## File path: fe/src/main/java/org/apache/doris/load/DeleteHandler.java ########## @@ -0,0 +1,684 @@ +// 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.doris.load; + +import com.google.common.base.Joiner; +import com.google.common.collect.Lists; +import com.google.common.collect.Maps; +import org.apache.doris.analysis.BinaryPredicate; +import org.apache.doris.analysis.DeleteStmt; +import org.apache.doris.analysis.IsNullPredicate; +import org.apache.doris.analysis.LiteralExpr; +import org.apache.doris.analysis.Predicate; +import org.apache.doris.analysis.SlotRef; +import org.apache.doris.catalog.Catalog; +import org.apache.doris.catalog.Column; +import org.apache.doris.catalog.Database; +import org.apache.doris.catalog.KeysType; +import org.apache.doris.catalog.MaterializedIndex; +import org.apache.doris.catalog.MaterializedIndex.IndexExtState; +import org.apache.doris.catalog.OlapTable; +import org.apache.doris.catalog.Partition; +import org.apache.doris.catalog.PartitionType; +import org.apache.doris.catalog.Replica; +import org.apache.doris.catalog.Table; +import org.apache.doris.catalog.Tablet; +import org.apache.doris.catalog.TabletInvertedIndex; +import org.apache.doris.catalog.Type; +import org.apache.doris.common.AnalysisException; +import org.apache.doris.common.Config; +import org.apache.doris.common.DdlException; +import org.apache.doris.common.ErrorCode; +import org.apache.doris.common.ErrorReport; +import org.apache.doris.common.UserException; +import org.apache.doris.common.io.Writable; +import org.apache.doris.common.util.ListComparator; +import org.apache.doris.common.util.TimeUtils; +import org.apache.doris.mysql.privilege.PrivPredicate; +import org.apache.doris.qe.ConnectContext; +import org.apache.doris.service.FrontendOptions; +import org.apache.doris.task.AgentBatchTask; +import org.apache.doris.task.AgentTaskExecutor; +import org.apache.doris.task.AgentTaskQueue; +import org.apache.doris.task.DeleteTask; +import org.apache.doris.task.MasterTaskExecutor; +import org.apache.doris.task.PushTask; +import org.apache.doris.thrift.TPriority; +import org.apache.doris.thrift.TPushType; +import org.apache.doris.thrift.TTaskType; +import org.apache.doris.transaction.GlobalTransactionMgr; +import org.apache.doris.transaction.TabletCommitInfo; +import org.apache.doris.transaction.TransactionState; +import org.apache.doris.transaction.TransactionStatus; +import org.apache.logging.log4j.LogManager; +import org.apache.logging.log4j.Logger; + +import java.io.DataInput; +import java.io.DataOutput; +import java.io.IOException; +import java.util.ArrayList; +import java.util.Collections; +import java.util.HashSet; +import java.util.LinkedList; +import java.util.List; +import java.util.Map; +import java.util.Map.Entry; +import java.util.Set; +import java.util.UUID; +import java.util.concurrent.BlockingQueue; +import java.util.concurrent.LinkedBlockingQueue; +import java.util.concurrent.locks.ReentrantReadWriteLock; + +public class DeleteHandler implements Writable { + private static final Logger LOG = LogManager.getLogger(DeleteHandler.class); + + // TransactionId -> DeleteTask + private Map<Long, DeleteTask> idToDeleteTask; + + // Db -> DeleteInfo list + private Map<Long, List<DeleteInfo>> dbToDeleteInfos; + + private MasterTaskExecutor executor; + + private BlockingQueue<DeleteTask> queue; + + private DeleteTaskChecker checker; + + private ReentrantReadWriteLock lock; + + public void readLock() { + lock.readLock().lock(); + } + + public void readUnlock() { + lock.readLock().unlock(); + } + + private void writeLock() { + lock.writeLock().lock(); + } + + private void writeUnlock() { + lock.writeLock().unlock(); + } + + + public DeleteHandler() { + idToDeleteTask = Maps.newHashMap(); + dbToDeleteInfos = Maps.newHashMap(); + executor = new MasterTaskExecutor(Config.delete_thread_num); + queue = new LinkedBlockingQueue(Config.delete_thread_num); + lock = new ReentrantReadWriteLock(true); + // start checker + checker = new DeleteTaskChecker(queue); + checker.start(); + } + + public void process(DeleteStmt stmt) throws DdlException { + String dbName = stmt.getDbName(); + String tableName = stmt.getTableName(); + String partitionName = stmt.getPartitionName(); + List<Predicate> conditions = stmt.getDeleteConditions(); + Database db = Catalog.getInstance().getDb(dbName); + if (db == null) { + throw new DdlException("Db does not exist. name: " + dbName); + } + + DeleteTask deleteTask = null; + DeleteInfo deleteInfo = null; + long transactionId; + db.readLock(); + try { + Table table = db.getTable(tableName); + if (table == null) { + throw new DdlException("Table does not exist. name: " + tableName); + } + + if (table.getType() != Table.TableType.OLAP) { + throw new DdlException("Not olap type table. type: " + table.getType().name()); + } + OlapTable olapTable = (OlapTable) table; + + if (olapTable.getState() != OlapTable.OlapTableState.NORMAL) { + throw new DdlException("Table's state is not normal: " + tableName); + } + + + if (partitionName == null) { + if (olapTable.getPartitionInfo().getType() == PartitionType.RANGE) { + throw new DdlException("This is a range partitioned table." + + " You should specify partition in delete stmt"); + } else { + // this is a unpartitioned table, use table name as partition name + partitionName = olapTable.getName(); + } + } + + Partition partition = olapTable.getPartition(partitionName); + if (partition == null) { + throw new DdlException("Partition does not exist. name: " + partitionName); + } + + List<String> deleteConditions = Lists.newArrayList(); + + // pre check + checkDeleteV2(olapTable, partition, conditions, deleteConditions, true); + + // generate label + String label = "delete_" + UUID.randomUUID(); + + // begin txn here and generate txn id + transactionId = Catalog.getCurrentGlobalTransactionMgr().beginTransaction(db.getId(), + Lists.newArrayList(table.getId()), label,"FE: " + FrontendOptions.getLocalHostAddress(), + TransactionState.LoadJobSourceType.FRONTEND, Config.stream_load_default_timeout_second); + + TransactionState state = Catalog.getCurrentGlobalTransactionMgr() + .getTransactionState(transactionId); + if (state == null) { + throw new DdlException("begin transaction failed, cancel delete"); + } + + deleteInfo = new DeleteInfo(db.getId(), olapTable.getId(), tableName, + partition.getId(), partitionName, + -1, 0, deleteConditions); + + // task in fe + deleteTask = new DeleteTask(transactionId, deleteInfo); + + writeLock(); + try { + idToDeleteTask.put(transactionId, deleteTask); + } finally { + writeUnlock(); + } + + // task sent to be + AgentBatchTask batchTask = new AgentBatchTask(); + + for (MaterializedIndex index : partition.getMaterializedIndices(IndexExtState.VISIBLE)) { + long indexId = index.getId(); + int schemaHash = olapTable.getSchemaHashByIndexId(indexId); + + for (Tablet tablet : index.getTablets()) { + long tabletId = tablet.getId(); + + // set push type + TPushType type = TPushType.DELETE; + + Set<Long> allReplicas = new HashSet<Long>(); + + for (Replica replica : tablet.getReplicas()) { + long replicaId = replica.getId(); + allReplicas.add(replicaId); + + // create push task for each replica + PushTask pushTask = new PushTask(null, + replica.getBackendId(), db.getId(), olapTable.getId(), + partition.getId(), indexId, + tabletId, replicaId, schemaHash, + -1, 0, "", -1, 0, + -1, type, conditions, + true, TPriority.NORMAL, + TTaskType.REALTIME_PUSH, + transactionId, + Catalog.getCurrentGlobalTransactionMgr().getTransactionIDGenerator().getNextTransactionId()); + pushTask.setIsSchemaChanging(true); + + if (AgentTaskQueue.addTask(pushTask)) { + batchTask.addTask(pushTask); + deleteTask.addTablet(tabletId); + deleteTask.addPushTask(pushTask); + } + + } + } + } + + // submit push tasks + if (batchTask.getTaskNum() > 0) { + AgentTaskExecutor.submit(batchTask); + queue.put(deleteTask); + } + + } catch (Throwable t) { + LOG.warn("error occurred during delete process", t); + throw new DdlException(t.getMessage(), t); + } finally { + db.readUnlock(); + } + + long timeout = deleteTask.getTimeout(); + LOG.info("waiting delete task finish, signature: {}, timeout: {}", transactionId, timeout); + // wait until delete task finish or timeout + deleteTask.join(timeout); + if (deleteTask.isQuorum()) { + commitTask(deleteTask, db); + } else { + boolean isSuccess = cancelTask(deleteTask, "delete task timeout"); + if (isSuccess) { + throw new DdlException("timeout when waiting delete"); + } + } + + // wait until transaction state become visible + afterCommit(deleteTask, db, timeout); + } + + private void afterCommit(DeleteTask deleteTask, Database db, long leftTime) throws DdlException { + try { + long startDeleteTime = System.currentTimeMillis(); + long transactionId = deleteTask.getSignature(); + while (true) { + db.writeLock(); + try { + // check if the job is aborted in transaction manager + TransactionState state = Catalog.getCurrentGlobalTransactionMgr() + .getTransactionState(transactionId); + if (state == null) { + LOG.warn("cancel delete, transactionId {}, because could not find transaction state", transactionId); + cancelTask(deleteTask,"transaction state lost"); + return; + } + TransactionStatus status = state.getTransactionStatus(); + switch (status) { + case ABORTED: + cancelTask(deleteTask,"delete transaction is aborted in transaction manager [" + state + "]"); + return; + case COMMITTED: + LOG.debug("delete task is already committed, just wait it to be visible, transactionId {}, transaction state {}", transactionId, state); + return; + case VISIBLE: + LOG.debug("delete committed, transactionId: {}, transaction state {}", transactionId, state); + removeTask(deleteTask); + return; + } + if (leftTime < System.currentTimeMillis() - startDeleteTime) { + cancelTask(deleteTask, "delete timeout when waiting transaction commit"); + } + } finally { + db.writeUnlock(); + } + Thread.sleep(1000); + } + } catch (Exception e) { + String failMsg = "delete unknown, " + e.getMessage(); + LOG.warn(failMsg, e); + throw new DdlException(failMsg); + } + } + + public class DeleteTaskChecker extends Thread { + private BlockingQueue<DeleteTask> queue; + + public DeleteTaskChecker(BlockingQueue<DeleteTask> queue) { + this.queue = queue; + } + + @Override + public void run() { + LOG.info("delete task checker start"); + try { + loop(); + } finally { + synchronized(queue) { + queue.clear(); + } + } + } + + public void loop() { + while (true) { + try { + DeleteTask task = queue.take(); + while (!task.isQuorum()) { + long signature = task.getSignature(); + if (task.isCancel()) { + break; + } + if (!executor.submit(task)) { + Thread.sleep(1000); + continue; + } + // re add to the tail + queue.put(task); + } + // remove task isQuorum or isCanceled + removeTask(task); + } catch (InterruptedException e) { + // do nothing + } + } + } + } + + private void commitTask(DeleteTask task, Database db) { + long transactionId = task.getSignature(); + GlobalTransactionMgr globalTransactionMgr = Catalog.getCurrentGlobalTransactionMgr(); + TransactionState transactionState = globalTransactionMgr.getTransactionState(transactionId); + List<TabletCommitInfo> tabletCommitInfos = new ArrayList<TabletCommitInfo>(); + db.writeLock(); + try { + TabletInvertedIndex invertedIndex = Catalog.getCurrentInvertedIndex(); + for (TabletDeleteInfo tDeleteInfo : task.getTabletDeleteInfo()) { + for (Replica replica : tDeleteInfo.getFinishedReplicas()) { + // the inverted index contains rolling up replica + Long tabletId = invertedIndex.getTabletIdByReplica(replica.getId()); + if (tabletId == null) { + LOG.warn("could not find tablet id for replica {}, the tablet maybe dropped", replica); + continue; + } + tabletCommitInfos.add(new TabletCommitInfo(tabletId, replica.getBackendId())); + } + } + globalTransactionMgr.commitTransaction(db.getId(), transactionId, tabletCommitInfos); Review comment: done ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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