content: /*
   * The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
   * (the "License"). You may not use this work except in compliance with the License, which is
   * available at www.apache.org/licenses/LICENSE-2.0
   *
   * This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
   * either express or implied, as more fully set forth in the License.
   *
   * See the NOTICE file distributed with this work for information regarding copyright ownership.
   */
  
  package alluxio.job.master;
  
  import static org.junit.Assert.assertTrue;
  
  import alluxio.ConfigurationRule;
  import alluxio.Constants;
  import alluxio.conf.Configuration;
  import alluxio.conf.PropertyKey;
  import alluxio.heartbeat.HeartbeatContext;
  import alluxio.heartbeat.HeartbeatScheduler;
  import alluxio.heartbeat.ManuallyScheduleHeartbeat;
  import alluxio.master.LocalAlluxioJobCluster;
  import alluxio.testutils.BaseIntegrationTest;
  import alluxio.testutils.LocalAlluxioClusterResource;
  import alluxio.util.CommonUtils;
  import alluxio.util.WaitForOptions;
  import alluxio.worker.JobWorkerIdRegistry;
  
  import com.google.common.collect.ImmutableMap;
  import org.junit.Before;
  import org.junit.Rule;
  import org.junit.Test;
  
  /**
   * Tests that we properly handle worker heartbeat timeouts and reregistrations.
   */
  public class LostWorkerIntegrationTest extends BaseIntegrationTest {
    private static final int WORKER_HEARTBEAT_TIMEOUT_MS = 10;
  
    @Rule
    public ManuallyScheduleHeartbeat mSchedule = new ManuallyScheduleHeartbeat(
        HeartbeatContext.JOB_MASTER_LOST_WORKER_DETECTION,
        HeartbeatContext.JOB_WORKER_COMMAND_HANDLING);
  
    @Rule
    public ConfigurationRule mConfigurationRule = new ConfigurationRule(ImmutableMap.of(
        PropertyKey.JOB_MASTER_WORKER_TIMEOUT, WORKER_HEARTBEAT_TIMEOUT_MS),
        Configuration.modifiableGlobal());
  
    // We need this because LocalAlluxioJobCluster doesn't work without it.
    @Rule
    public LocalAlluxioClusterResource mLocalAlluxioClusterResource =
        new LocalAlluxioClusterResource.Builder().build();
  
    private LocalAlluxioJobCluster mLocalAlluxioJobCluster;
  
    @Before
    public void before() throws Exception {
      mLocalAlluxioJobCluster = new LocalAlluxioJobCluster();
      mLocalAlluxioJobCluster.start();
    }
  
    @Test
    public void lostWorkerReregisters() throws Exception {
      final Long initialId = JobWorkerIdRegistry.getWorkerId();
      // Sleep so that the master thinks the worker has gone too long without a heartbeat.
      CommonUtils.sleepMs(WORKER_HEARTBEAT_TIMEOUT_MS + 1);
      HeartbeatScheduler.execute(HeartbeatContext.JOB_MASTER_LOST_WORKER_DETECTION);
      assertTrue(mLocalAlluxioJobCluster.getMaster().getJobMaster().getWorkerInfoList().isEmpty());
  
      // Reregister the worker.
      HeartbeatScheduler.execute(HeartbeatContext.JOB_WORKER_COMMAND_HANDLING);
      CommonUtils.waitFor("worker to reregister",
          () -> !mLocalAlluxioJobCluster.getMaster().getJobMaster().getWorkerInfoList().isEmpty()
              && JobWorkerIdRegistry.getWorkerId().longValue() != initialId,
          WaitForOptions.defaults().setTimeoutMs(10 * Constants.SECOND_MS));
    }
  }
  