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https://issues.apache.org/jira/browse/HDDS-1501?focusedWorklogId=242900&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-242900
]
ASF GitHub Bot logged work on HDDS-1501:
----------------------------------------
Author: ASF GitHub Bot
Created on: 15/May/19 22:20
Start Date: 15/May/19 22:20
Worklog Time Spent: 10m
Work Description: swagle commented on pull request #819: HDDS-1501 :
Create a Recon task interface to update internal DB on updates from OM.
URL: https://github.com/apache/hadoop/pull/819#discussion_r284474114
##########
File path:
hadoop-ozone/ozone-recon/src/main/java/org/apache/hadoop/ozone/recon/tasks/ReconTaskControllerImpl.java
##########
@@ -0,0 +1,199 @@
+/**
+ * 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
+ * <p>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p>
+ * 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.ozone.recon.tasks;
+
+import static
org.apache.hadoop.ozone.recon.ReconServerConfigKeys.OZONE_RECON_TASK_THREAD_COUNT_DEFAULT;
+import static
org.apache.hadoop.ozone.recon.ReconServerConfigKeys.OZONE_RECON_TASK_THREAD_COUNT_KEY;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.Callable;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.Future;
+import java.util.concurrent.Semaphore;
+import java.util.concurrent.atomic.AtomicInteger;
+
+import org.apache.commons.lang3.tuple.Pair;
+import org.apache.hadoop.hdds.conf.OzoneConfiguration;
+import org.apache.hadoop.ozone.recon.recovery.ReconOMMetadataManager;
+import org.hadoop.ozone.recon.schema.tables.daos.ReconTaskStatusDao;
+import org.hadoop.ozone.recon.schema.tables.pojos.ReconTaskStatus;
+import org.jooq.Configuration;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import com.google.inject.Inject;
+
+/**
+ * Implementation of ReconTaskController.
+ */
+public class ReconTaskControllerImpl implements ReconTaskController {
+
+ private static final Logger LOG =
+ LoggerFactory.getLogger(ReconTaskControllerImpl.class);
+
+ private Map<String, ReconDBUpdateTask> reconDBUpdateTasks;
+ private ExecutorService executorService;
+ private int threadCount = 1;
+ private final Semaphore taskSemaphore = new Semaphore(1);
+ private final ReconOMMetadataManager omMetadataManager;
+ private Map<String, AtomicInteger> taskFailureCounter = new HashMap<>();
+ private static final int TASK_FAILURE_THRESHOLD = 2;
+ private ReconTaskStatusDao reconTaskStatusDao;
+
+ @Inject
+ public ReconTaskControllerImpl(OzoneConfiguration configuration,
+ ReconOMMetadataManager omMetadataManager,
+ Configuration sqlConfiguration) {
+ this.omMetadataManager = omMetadataManager;
+ reconDBUpdateTasks = new HashMap<>();
+ threadCount = configuration.getInt(OZONE_RECON_TASK_THREAD_COUNT_KEY,
+ OZONE_RECON_TASK_THREAD_COUNT_DEFAULT);
+ executorService = Executors.newFixedThreadPool(threadCount);
+ reconTaskStatusDao = new ReconTaskStatusDao(sqlConfiguration);
+ }
+
+ @Override
+ public void registerTask(ReconDBUpdateTask task) {
+ String taskName = task.getTaskName();
+ LOG.info("Registered task " + taskName + " with controller.");
+
+ // Store task in Task Map.
+ reconDBUpdateTasks.put(taskName, task);
+ // Store Task in Task failure tracker.
+ taskFailureCounter.put(taskName, new AtomicInteger(0));
+ // Create DB record for the task.
+ ReconTaskStatus reconTaskStatusRecord = new ReconTaskStatus(taskName,
+ 0L, 0L);
+ reconTaskStatusDao.insert(reconTaskStatusRecord);
+ }
+
+ /**
+ * For every registered task, we try process step twice and then reprocess
+ * once (if process failed twice) to absorb the events. If a task has failed
+ * reprocess call more than 2 times across events, it is unregistered
+ * (blacklisted).
+ * @param events set of events
+ * @throws InterruptedException
+ */
+ @Override
+ public void consumeOMEvents(OMUpdateEventBatch events)
+ throws InterruptedException {
+
+
+ taskSemaphore.acquire();
+
+ try {
+ Collection<Callable<Pair>> tasks = new ArrayList<>();
+ for (Map.Entry<String, ReconDBUpdateTask> taskEntry :
+ reconDBUpdateTasks.entrySet()) {
+ ReconDBUpdateTask task = taskEntry.getValue();
+ tasks.add(() -> task.process(events));
+ }
+
+ List<String> failedTasks = new ArrayList<>();
+ List<Future<Pair>> results = executorService.invokeAll(tasks);
Review comment:
Here we should use 1 thread per task since that is the sole work of Recon.
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Issue Time Tracking
-------------------
Worklog Id: (was: 242900)
Time Spent: 1h 40m (was: 1.5h)
> Create a Recon task interface that is used to update the aggregate DB
> whenever updates from OM are received.
> ------------------------------------------------------------------------------------------------------------
>
> Key: HDDS-1501
> URL: https://issues.apache.org/jira/browse/HDDS-1501
> Project: Hadoop Distributed Data Store
> Issue Type: Sub-task
> Components: Ozone Recon
> Reporter: Aravindan Vijayan
> Assignee: Aravindan Vijayan
> Priority: Major
> Labels: pull-request-available
> Fix For: 0.5.0
>
> Time Spent: 1h 40m
> Remaining Estimate: 0h
>
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