Gallardot commented on code in PR #15528: URL: https://github.com/apache/dolphinscheduler/pull/15528#discussion_r1473938389
########## dolphinscheduler-master/src/main/java/org/apache/dolphinscheduler/server/master/runner/taskgroup/TaskGroupCoordinator.java: ########## @@ -0,0 +1,451 @@ +/* + * 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.dolphinscheduler.server.master.runner.taskgroup; + +import org.apache.dolphinscheduler.common.constants.Constants; +import org.apache.dolphinscheduler.common.enums.Flag; +import org.apache.dolphinscheduler.common.enums.TaskGroupQueueStatus; +import org.apache.dolphinscheduler.common.enums.WorkflowExecutionStatus; +import org.apache.dolphinscheduler.common.lifecycle.ServerLifeCycleManager; +import org.apache.dolphinscheduler.common.thread.BaseDaemonThread; +import org.apache.dolphinscheduler.common.thread.ThreadUtils; +import org.apache.dolphinscheduler.dao.entity.ProcessInstance; +import org.apache.dolphinscheduler.dao.entity.TaskGroup; +import org.apache.dolphinscheduler.dao.entity.TaskGroupQueue; +import org.apache.dolphinscheduler.dao.entity.TaskInstance; +import org.apache.dolphinscheduler.dao.repository.ProcessInstanceDao; +import org.apache.dolphinscheduler.dao.repository.TaskGroupDao; +import org.apache.dolphinscheduler.dao.repository.TaskGroupQueueDao; +import org.apache.dolphinscheduler.dao.repository.TaskInstanceDao; +import org.apache.dolphinscheduler.extract.base.client.SingletonJdkDynamicRpcClientProxyFactory; +import org.apache.dolphinscheduler.extract.master.IWorkflowInstanceService; +import org.apache.dolphinscheduler.extract.master.transportor.TaskInstanceWakeupRequest; +import org.apache.dolphinscheduler.extract.master.transportor.TaskInstanceWakeupResponse; +import org.apache.dolphinscheduler.plugin.task.api.enums.TaskExecutionStatus; +import org.apache.dolphinscheduler.plugin.task.api.utils.LogUtils; +import org.apache.dolphinscheduler.registry.api.RegistryClient; +import org.apache.dolphinscheduler.registry.api.enums.RegistryNodeType; + +import org.apache.commons.collections4.CollectionUtils; +import org.apache.commons.lang3.time.StopWatch; + +import java.util.Date; +import java.util.List; +import java.util.Map; +import java.util.function.Function; +import java.util.stream.Collectors; + +import lombok.extern.slf4j.Slf4j; + +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.stereotype.Component; + +/** + * The TaskGroupCoordinator use to manage the task group slot. The task group slot is used to limit the number of {@link TaskInstance} that can be run at the same time. + * <p> + * The {@link TaskGroupQueue} is used to represent the task group slot. When a {@link TaskGroupQueue} which inQueue is YES means the {@link TaskGroupQueue} is using by a {@link TaskInstance}. + * <p> + * When the {@link TaskInstance} need to use task group, we should use @{@link TaskGroupCoordinator#acquireTaskGroupSlot(TaskInstance)} to acquire the task group slot, + * this method doesn't block should always acquire successfully, and you should directly stop dispatch the task instance. + * When the task group slot is available, the TaskGroupCoordinator will wake up the waiting {@link TaskInstance} to dispatch. + * <pre> + * if(needAcquireTaskGroupSlot(taskInstance)) { + * taskGroupCoordinator.acquireTaskGroupSlot(taskInstance); + * return; + * } + * </pre> + * <p> + * When the {@link TaskInstance} is finished, we should use @{@link TaskGroupCoordinator#releaseTaskGroupSlot(TaskInstance)} to release the task group slot. + * <pre> + * if(needToReleaseTaskGroupSlot(taskInstance)) { + * taskGroupCoordinator.releaseTaskGroupSlot(taskInstance); + * } + * </pre> + */ +@Slf4j +@Component +public class TaskGroupCoordinator extends BaseDaemonThread { + + @Autowired + private RegistryClient registryClient; + + @Autowired + private TaskGroupDao taskGroupDao; + + @Autowired + private TaskGroupQueueDao taskGroupQueueDao; + + @Autowired + private TaskInstanceDao taskInstanceDao; + + @Autowired + private ProcessInstanceDao processInstanceDao; + + public TaskGroupCoordinator() { + super("TaskGroupCoordinator"); + } + + @Override + public synchronized void start() { + log.info("TaskGroupCoordinator starting..."); + super.start(); + log.info("TaskGroupCoordinator started..."); + } + + @Override + public void run() { + while (!ServerLifeCycleManager.isStopped()) { + try { + if (!ServerLifeCycleManager.isRunning()) { + continue; + } + try { + registryClient.getLock(RegistryNodeType.MASTER_TASK_GROUP_COORDINATOR_LOCK.getRegistryPath()); + StopWatch taskGroupCoordinatorRoundTimeCost = StopWatch.createStarted(); + + amendTaskGroupUseSize(); + amendTaskGroupQueueStatus(); + dealWithForceStartTaskGroupQueue(); + dealWithWaitingTaskGroupQueue(); + + taskGroupCoordinatorRoundTimeCost.stop(); + log.info("TaskGroupCoordinator round time cost: {}/ms", + taskGroupCoordinatorRoundTimeCost.getTime()); + } finally { + registryClient.releaseLock(RegistryNodeType.MASTER_TASK_GROUP_COORDINATOR_LOCK.getRegistryPath()); + } + } catch (Throwable e) { + log.error("TaskGroupCoordinator error", e); + } finally { + // sleep 5s + ThreadUtils.sleep(Constants.SLEEP_TIME_MILLIS * 5); + } + } + } + + /** + * Make sure the TaskGroup useSize is equal to the TaskGroupQueue which status is {@link TaskGroupQueueStatus#ACQUIRE_SUCCESS} and forceStart is {@link org.apache.dolphinscheduler.common.enums.Flag#NO}. + */ + private void amendTaskGroupUseSize() { + // The TaskGroup useSize should equal to the TaskGroupQueue which inQueue is YES and forceStart is NO + List<TaskGroup> taskGroups = taskGroupDao.queryAllTaskGroups(); + if (CollectionUtils.isEmpty(taskGroups)) { + return; + } + for (TaskGroup taskGroup : taskGroups) { + List<TaskGroupQueue> taskGroupQueues = + taskGroupQueueDao.queryAcquiredTaskGroupQueueByGroupId(taskGroup.getId()); + int actualUseSize = taskGroupQueues.size(); + if (taskGroup.getUseSize() == actualUseSize) { + continue; + } + log.warn("The TaskGroup: {} useSize is {}, but the actual use size is {}, will amend it", + taskGroup.getName(), + taskGroup.getUseSize(), actualUseSize); + taskGroup.setUseSize(actualUseSize); + taskGroupDao.updateById(taskGroup); + } + } + + /** + * Make sure the TaskGroupQueue status is {@link TaskGroupQueueStatus#RELEASE} when the related {@link TaskInstance} is not exist or status is finished. + */ + private void amendTaskGroupQueueStatus() { + List<TaskGroupQueue> taskGroupQueues = taskGroupQueueDao.queryAllInQueueTaskGroupQueue(); + List<Integer> taskInstanceIds = taskGroupQueues.stream() + .map(TaskGroupQueue::getTaskId) + .collect(Collectors.toList()); + Map<Integer, TaskInstance> taskInstanceMap = taskInstanceDao.queryByIds(taskInstanceIds) + .stream() + .collect(Collectors.toMap(TaskInstance::getId, Function.identity())); + + for (TaskGroupQueue taskGroupQueue : taskGroupQueues) { + int taskId = taskGroupQueue.getTaskId(); + TaskInstance taskInstance = taskInstanceMap.get(taskId); + + if (taskInstance == null) { + log.warn("The TaskInstance: {} is not exist, will release the TaskGroupQueue: {}", taskId, + taskGroupQueue); + releaseTaskGroupQueueSlot(taskGroupQueue); + continue; + } + + if (taskInstance.getState().isFinished()) { + log.warn("The TaskInstance: {} state: {} finished, will release the TaskGroupQueue: {}", + taskInstance.getName(), taskInstance.getState(), taskGroupQueue); + releaseTaskGroupQueueSlot(taskGroupQueue); + continue; Review Comment: Useless code -- This is an automated message from the Apache Git Service. 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