mqliang commented on a change in pull request #7091: URL: https://github.com/apache/incubator-pinot/pull/7091#discussion_r658472544
########## File path: pinot-controller/src/main/java/org/apache/pinot/controller/helix/core/minion/TaskMetricsEmitter.java ########## @@ -0,0 +1,81 @@ +/** + * 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.pinot.controller.helix.core.minion; + +import java.util.Set; +import org.apache.pinot.common.metrics.ControllerGauge; +import org.apache.pinot.common.metrics.ControllerMetrics; +import org.apache.pinot.controller.ControllerConf; +import org.apache.pinot.controller.LeadControllerManager; +import org.apache.pinot.controller.helix.core.minion.PinotHelixTaskResourceManager.TaskCount; +import org.apache.pinot.core.periodictask.BasePeriodicTask; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + + +public class TaskMetricsEmitter extends BasePeriodicTask { + private static final Logger LOGGER = LoggerFactory.getLogger(TaskMetricsEmitter.class); + private final static String TASK_NAME = "TaskMetricsEmitter"; + + private final PinotHelixTaskResourceManager _helixTaskResourceManager; + private final ControllerMetrics _controllerMetrics; + private final LeadControllerManager _leadControllerManager; + + public TaskMetricsEmitter(PinotHelixTaskResourceManager helixTaskResourceManager, + LeadControllerManager leadControllerManager, ControllerConf controllerConf, ControllerMetrics controllerMetrics) { + super(TASK_NAME, controllerConf.getTaskMetricsEmitterFrequencyInSeconds(), + controllerConf.getPeriodicTaskInitialDelayInSeconds()); + _helixTaskResourceManager = helixTaskResourceManager; + _controllerMetrics = controllerMetrics; + _leadControllerManager = leadControllerManager; + } + + @Override + protected final void runTask() { + // Make it so that only one controller returns the metric for all the tasks. + if (!_leadControllerManager.isLeaderForTable(TASK_NAME)) { + return; + } + + // The call to get task types can take time if there are a lot of tasks. + // Potential optimization is to call it every (say) 30m if we detect a barrage of + // zk requests. + Set<String> taskTypes = _helixTaskResourceManager.getTaskTypes(); + for (String taskType : taskTypes) { + TaskCount accumulated = new TaskCount(); + Set<String> tasksInProgress = _helixTaskResourceManager.getTasksInProgress(taskType); + int numRunningTasks = 0; + for (String task : tasksInProgress) { + numRunningTasks++; Review comment: Instead of `numRunningTasks++;` in for loop, how about declare `int numRunningTasks = tasksInProgress.size()` out of the for loop? ########## File path: pinot-controller/src/main/java/org/apache/pinot/controller/helix/core/minion/PinotHelixTaskResourceManager.java ########## @@ -258,6 +262,50 @@ public synchronized String submitTask(List<PinotTaskConfig> pinotTaskConfigs, St return taskStates; } + /** + * This method helps compute the percentage done for a task (that may have many partitions or sub-tasks). + * @param parentTaskName (e.g. "Task_TestTask_1624403781879") + * @return a pair of integers, first one being the total number partitions and the second being number of partitions + * still running or yet to run. + */ + public synchronized TaskCount getTaskCount(String parentTaskName) { + JobContext jobContext = _taskDriver.getJobContext(getHelixJobName(parentTaskName)); + TaskCount taskCount = new TaskCount(); + for (int partition : jobContext.getPartitionSet()) { + taskCount.addToTotal(1); Review comment: `taskCount.addToTotal(jobContext.getPartitionSet().size());` out of the for loop? ########## File path: pinot-controller/src/main/java/org/apache/pinot/controller/helix/core/minion/PinotHelixTaskResourceManager.java ########## @@ -258,6 +262,50 @@ public synchronized String submitTask(List<PinotTaskConfig> pinotTaskConfigs, St return taskStates; } + /** + * This method helps compute the percentage done for a task (that may have many partitions or sub-tasks). + * @param parentTaskName (e.g. "Task_TestTask_1624403781879") + * @return a pair of integers, first one being the total number partitions and the second being number of partitions Review comment: Please update the javadoc of return type here. -- This is an automated message from the Apache Git Service. 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