[12691] | 1 | #region License Information
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| 2 | /* HeuristicLab
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[17180] | 3 | * Copyright (C) Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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[12691] | 4 | *
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| 5 | * This file is part of HeuristicLab.
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| 6 | *
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| 7 | * HeuristicLab is free software: you can redistribute it and/or modify
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| 8 | * it under the terms of the GNU General Public License as published by
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| 9 | * the Free Software Foundation, either version 3 of the License, or
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| 10 | * (at your option) any later version.
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| 11 | *
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| 12 | * HeuristicLab is distributed in the hope that it will be useful,
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| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 15 | * GNU General Public License for more details.
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| 16 | *
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| 17 | * You should have received a copy of the GNU General Public License
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| 18 | * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
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| 19 | */
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| 20 | #endregion
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| 21 |
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| 22 | using System;
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| 23 | using System.Collections.Generic;
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| 24 | using System.Linq;
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| 25 | using System.Threading;
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| 26 | using HeuristicLab.Services.Hive.DataAccess;
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| 27 | using HeuristicLab.Services.Hive.DataAccess.Interfaces;
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| 28 | using HeuristicLab.Services.Hive.DataTransfer;
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| 29 | using DA = HeuristicLab.Services.Hive.DataAccess;
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| 30 |
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| 31 | namespace HeuristicLab.Services.Hive.Manager {
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[12861] | 32 | public class HeartbeatManager {
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[12691] | 33 | private const string MutexName = "HiveTaskSchedulingMutex";
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| 34 |
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| 35 | private IPersistenceManager PersistenceManager {
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| 36 | get { return ServiceLocator.Instance.PersistenceManager; }
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| 37 | }
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| 38 |
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| 39 | private ITaskScheduler TaskScheduler {
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[12861] | 40 | get { return ServiceLocator.Instance.TaskScheduler; }
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[12691] | 41 | }
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| 42 |
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| 43 | /// <summary>
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| 44 | /// This method will be called every time a slave sends a heartbeat (-> very often; concurrency is important!)
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| 45 | /// </summary>
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| 46 | /// <returns>a list of actions the slave should do</returns>
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| 47 | public List<MessageContainer> ProcessHeartbeat(Heartbeat heartbeat) {
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| 48 | List<MessageContainer> actions = new List<MessageContainer>();
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[12858] | 49 | var pm = PersistenceManager;
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| 50 | var slaveDao = pm.SlaveDao;
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| 51 | var taskDao = pm.TaskDao;
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| 52 | var slave = pm.UseTransaction(() => slaveDao.GetById(heartbeat.SlaveId));
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| 53 | if (slave == null) {
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| 54 | actions.Add(new MessageContainer(MessageContainer.MessageType.SayHello));
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| 55 | } else {
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| 56 | if (heartbeat.HbInterval != slave.HbInterval) {
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| 57 | actions.Add(new MessageContainer(MessageContainer.MessageType.NewHBInterval));
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| 58 | }
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| 59 | if (slaveDao.SlaveHasToShutdownComputer(slave.ResourceId)) {
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| 60 | actions.Add(new MessageContainer(MessageContainer.MessageType.ShutdownComputer));
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| 61 | }
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| 62 | // update slave data
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| 63 | slave.FreeCores = heartbeat.FreeCores;
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| 64 | slave.FreeMemory = heartbeat.FreeMemory;
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| 65 | slave.CpuUtilization = heartbeat.CpuUtilization;
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| 66 | slave.SlaveState = (heartbeat.JobProgress != null && heartbeat.JobProgress.Count > 0)
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| 67 | ? DA.SlaveState.Calculating
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| 68 | : DA.SlaveState.Idle;
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| 69 | slave.LastHeartbeat = DateTime.Now;
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| 70 | pm.UseTransaction(() => {
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| 71 | slave.IsAllowedToCalculate = slaveDao.SlaveIsAllowedToCalculate(slave.ResourceId);
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| 72 | pm.SubmitChanges();
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| 73 | });
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[12691] | 74 |
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[12858] | 75 | // update task data
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| 76 | actions.AddRange(UpdateTasks(pm, heartbeat, slave.IsAllowedToCalculate));
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[12691] | 77 |
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[12858] | 78 | // assign new task
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| 79 | if (heartbeat.AssignJob && slave.IsAllowedToCalculate && heartbeat.FreeCores > 0) {
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| 80 | bool mutexAquired = false;
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| 81 | var mutex = new Mutex(false, MutexName);
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| 82 | try {
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| 83 | mutexAquired = mutex.WaitOne(Properties.Settings.Default.SchedulingPatience);
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| 84 | if (mutexAquired) {
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| 85 | var waitingTasks = pm.UseTransaction(() => taskDao.GetWaitingTasks(slave)
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| 86 | .Select(x => new TaskInfoForScheduler {
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| 87 | TaskId = x.TaskId,
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| 88 | JobId = x.JobId,
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| 89 | Priority = x.Priority
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| 90 | })
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| 91 | .ToList()
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| 92 | );
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| 93 | var availableTasks = TaskScheduler.Schedule(waitingTasks).ToArray();
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| 94 | if (availableTasks.Any()) {
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| 95 | var task = availableTasks.First();
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| 96 | AssignTask(pm, slave, task.TaskId);
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| 97 | actions.Add(new MessageContainer(MessageContainer.MessageType.CalculateTask, task.TaskId));
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[12691] | 98 | }
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[12858] | 99 | } else {
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| 100 | LogFactory.GetLogger(this.GetType().Namespace).Log("HeartbeatManager: The mutex used for scheduling could not be aquired.");
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[12691] | 101 | }
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| 102 | }
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[12858] | 103 | catch (AbandonedMutexException) {
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| 104 | LogFactory.GetLogger(this.GetType().Namespace).Log("HeartbeatManager: The mutex used for scheduling has been abandoned.");
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| 105 | }
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| 106 | catch (Exception ex) {
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| 107 | LogFactory.GetLogger(this.GetType().Namespace).Log(string.Format("HeartbeatManager threw an exception in ProcessHeartbeat: {0}", ex));
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| 108 | }
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| 109 | finally {
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| 110 | if (mutexAquired) mutex.ReleaseMutex();
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| 111 | }
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[12691] | 112 | }
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| 113 | }
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| 114 | return actions;
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| 115 | }
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| 116 |
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| 117 | private void AssignTask(IPersistenceManager pm, DA.Slave slave, Guid taskId) {
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| 118 | const DA.TaskState transferring = DA.TaskState.Transferring;
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| 119 | DateTime now = DateTime.Now;
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| 120 | var taskDao = pm.TaskDao;
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| 121 | var stateLogDao = pm.StateLogDao;
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| 122 | pm.UseTransaction(() => {
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| 123 | var task = taskDao.GetById(taskId);
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| 124 | stateLogDao.Save(new DA.StateLog {
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| 125 | State = transferring,
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| 126 | DateTime = now,
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| 127 | TaskId = taskId,
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| 128 | SlaveId = slave.ResourceId,
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| 129 | UserId = null,
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| 130 | Exception = null
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| 131 | });
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| 132 | task.State = transferring;
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| 133 | task.LastHeartbeat = now;
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| 134 | pm.SubmitChanges();
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| 135 | });
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| 136 | }
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| 137 |
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| 138 | /// <summary>
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| 139 | /// Update the progress of each task
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| 140 | /// Checks if all the task sent by heartbeat are supposed to be calculated by this slave
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| 141 | /// </summary>
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| 142 | private IEnumerable<MessageContainer> UpdateTasks(IPersistenceManager pm, Heartbeat heartbeat, bool isAllowedToCalculate) {
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| 143 | var taskDao = pm.TaskDao;
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[16117] | 144 | var jobDao = pm.JobDao;
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| 145 | var assignedJobResourceDao = pm.AssignedJobResourceDao;
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[12691] | 146 | var actions = new List<MessageContainer>();
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[12773] | 147 | if (heartbeat.JobProgress == null || !heartbeat.JobProgress.Any())
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[12691] | 148 | return actions;
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| 149 |
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[16117] | 150 | var jobIdsWithStatisticsPending = jobDao.GetJobIdsByState(DA.JobState.StatisticsPending).ToList();
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[12691] | 151 |
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[16117] | 152 | // select all tasks and statelogs with one query
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| 153 | var taskIds = heartbeat.JobProgress.Select(x => x.Key).ToList();
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| 154 | var taskInfos = pm.UseTransaction(() =>
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| 155 | (from task in taskDao.GetAll()
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| 156 | where taskIds.Contains(task.TaskId)
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| 157 | let lastStateLog = task.StateLogs.OrderByDescending(x => x.DateTime).FirstOrDefault()
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| 158 | select new {
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| 159 | TaskId = task.TaskId,
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| 160 | JobId = task.JobId,
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| 161 | State = task.State,
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| 162 | Command = task.Command,
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| 163 | SlaveId = lastStateLog != null ? lastStateLog.SlaveId : default(Guid)
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| 164 | }).ToList()
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| 165 | );
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| 166 |
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| 167 | // process the jobProgresses
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| 168 | foreach (var jobProgress in heartbeat.JobProgress) {
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| 169 | var progress = jobProgress;
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| 170 | var curTask = taskInfos.SingleOrDefault(x => x.TaskId == progress.Key);
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| 171 | if (curTask == null) {
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| 172 | actions.Add(new MessageContainer(MessageContainer.MessageType.AbortTask, progress.Key));
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| 173 | LogFactory.GetLogger(this.GetType().Namespace).Log("Task on slave " + heartbeat.SlaveId + " does not exist in DB: " + jobProgress.Key);
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| 174 | } else if (jobIdsWithStatisticsPending.Contains(curTask.JobId)) {
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| 175 | // parenting job of current task has been requested for deletion (indicated by job state "Statistics Pending")
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| 176 | // update task execution time
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| 177 | pm.UseTransaction(() => {
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| 178 | taskDao.UpdateExecutionTime(curTask.TaskId, progress.Value.TotalMilliseconds);
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| 179 | });
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| 180 | actions.Add(new MessageContainer(MessageContainer.MessageType.AbortTask, curTask.TaskId));
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| 181 | LogFactory.GetLogger(this.GetType().Namespace).Log("Abort task " + curTask.TaskId + " on slave " + heartbeat.SlaveId + ". The parenting job " + curTask.JobId + " was requested to be deleted.");
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| 182 | } else if (curTask.SlaveId == Guid.Empty || curTask.SlaveId != heartbeat.SlaveId) {
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| 183 | // assigned slave does not match heartbeat
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| 184 | actions.Add(new MessageContainer(MessageContainer.MessageType.AbortTask, curTask.TaskId));
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| 185 | LogFactory.GetLogger(this.GetType().Namespace).Log("The slave " + heartbeat.SlaveId + " is not supposed to calculate task: " + curTask.TaskId);
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| 186 | } else if (!isAllowedToCalculate) {
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| 187 | actions.Add(new MessageContainer(MessageContainer.MessageType.PauseTask, curTask.TaskId));
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| 188 | LogFactory.GetLogger(this.GetType().Namespace).Log("The slave " + heartbeat.SlaveId + " is not allowed to calculate any tasks tue to a downtime. The task is paused.");
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| 189 | } else if (!assignedJobResourceDao.CheckJobGrantedForResource(curTask.JobId, heartbeat.SlaveId)) {
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| 190 | // slaveId (and parent resourceGroupIds) are not among the assigned resources ids for task-parenting job
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| 191 | // this might happen when (a) job-resource assignment has been changed (b) slave is moved to different group
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| 192 | actions.Add(new MessageContainer(MessageContainer.MessageType.PauseTask, curTask.TaskId));
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| 193 | LogFactory.GetLogger(this.GetType().Namespace).Log("The slave " + heartbeat.SlaveId + " is not granted to calculate task: " + curTask.TaskId + " of job: " + curTask.JobId);
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| 194 | } else {
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| 195 | // update task execution time
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| 196 | pm.UseTransaction(() => {
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| 197 | taskDao.UpdateExecutionTime(curTask.TaskId, progress.Value.TotalMilliseconds);
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| 198 | });
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| 199 | switch (curTask.Command) {
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| 200 | case DA.Command.Stop:
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| 201 | actions.Add(new MessageContainer(MessageContainer.MessageType.StopTask, curTask.TaskId));
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| 202 | break;
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| 203 | case DA.Command.Pause:
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| 204 | actions.Add(new MessageContainer(MessageContainer.MessageType.PauseTask, curTask.TaskId));
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| 205 | break;
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| 206 | case DA.Command.Abort:
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[12691] | 207 | actions.Add(new MessageContainer(MessageContainer.MessageType.AbortTask, curTask.TaskId));
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[16117] | 208 | break;
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[12691] | 209 | }
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| 210 | }
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[16117] | 211 |
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| 212 | }
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[12691] | 213 | return actions;
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| 214 | }
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| 215 | }
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| 216 | }
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