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+/**
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+ * Licensed to the Apache Software Foundation (ASF) under one
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+ * or more contributor license agreements. See the NOTICE file
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+ * distributed with this work for additional information
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+ * regarding copyright ownership. The ASF licenses this file
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+ * to you under the Apache License, Version 2.0 (the
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+ * "License"); you may not use this file except in compliance
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+ * with the License. You may obtain a copy of the License at
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+ *
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+ * http://www.apache.org/licenses/LICENSE-2.0
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+ *
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+ * Unless required by applicable law or agreed to in writing, software
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+ * distributed under the License is distributed on an "AS IS" BASIS,
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+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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+ * See the License for the specific language governing permissions and
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+ * limitations under the License.
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+ */
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+
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+package org.apache.hadoop.yarn.server.resourcemanager;
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+
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+import java.io.IOException;
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+import java.util.ArrayList;
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+import java.util.Collections;
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+import java.util.List;
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+
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+import org.apache.hadoop.metrics2.lib.DefaultMetricsSystem;
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+import org.apache.hadoop.security.UserGroupInformation;
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+import org.apache.hadoop.yarn.api.protocolrecords.RegisterApplicationMasterResponse;
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+import org.apache.hadoop.yarn.api.records.Container;
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+import org.apache.hadoop.yarn.api.records.ContainerId;
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+import org.apache.hadoop.yarn.api.records.ContainerStatus;
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+import org.apache.hadoop.yarn.api.records.ResourceRequest;
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+import org.apache.hadoop.yarn.conf.YarnConfiguration;
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+import org.apache.hadoop.yarn.exceptions.InvalidApplicationMasterRequestException;
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+import org.apache.hadoop.yarn.server.resourcemanager.rmapp.RMApp;
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+import org.apache.log4j.Level;
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+import org.apache.log4j.LogManager;
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+import org.apache.log4j.Logger;
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+import org.junit.Assert;
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+import org.junit.Before;
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+import org.junit.Test;
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+
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+/**
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+ * Test UAM handling in RM.
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+ */
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+public class TestWorkPreservingUnmanagedAM
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+ extends ParameterizedSchedulerTestBase {
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+
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+ private YarnConfiguration conf;
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+
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+ public TestWorkPreservingUnmanagedAM() throws IOException {
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+ super();
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+ }
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+
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+ @Before
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+ public void setup() {
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+ Logger rootLogger = LogManager.getRootLogger();
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+ rootLogger.setLevel(Level.DEBUG);
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+ conf = getConf();
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+ UserGroupInformation.setConfiguration(conf);
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+ DefaultMetricsSystem.setMiniClusterMode(true);
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+ }
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+
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+ /**
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+ * Test UAM work preserving restart. When the keepContainersAcrossAttempt flag
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+ * is on, we allow UAM to directly register again and move on without getting
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+ * the applicationAlreadyRegistered exception.
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+ */
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+ protected void testUAMRestart(boolean keepContainers) throws Exception {
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+ // start RM
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+ MockRM rm = new MockRM();
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+ rm.start();
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+ MockNM nm =
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+ new MockNM("127.0.0.1:1234", 15120, rm.getResourceTrackerService());
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+ nm.registerNode();
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+
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+ // create app and launch the UAM
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+ boolean unamanged = true;
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+ int maxAttempts = 1;
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+ boolean waitForAccepted = true;
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+ RMApp app = rm.submitApp(200, "",
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+ UserGroupInformation.getCurrentUser().getShortUserName(), null,
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+ unamanged, null, maxAttempts, null, null, waitForAccepted,
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+ keepContainers);
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+
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+ MockAM am = MockRM.launchUAM(app, rm, nm);
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+
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+ // Register for the first time
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+ am.registerAppAttempt();
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+
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+ // Allocate two containers to UAM
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+ int numContainers = 3;
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+ List<Container> conts = am.allocate("127.0.0.1", 1000, numContainers,
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+ new ArrayList<ContainerId>()).getAllocatedContainers();
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+ while (conts.size() < numContainers) {
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+ nm.nodeHeartbeat(true);
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+ conts.addAll(am.allocate(new ArrayList<ResourceRequest>(),
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+ new ArrayList<ContainerId>()).getAllocatedContainers());
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+ Thread.sleep(100);
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+ }
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+
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+ // Release one container
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+ List<ContainerId> releaseList =
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+ Collections.singletonList(conts.get(0).getId());
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+ List<ContainerStatus> finishedConts =
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+ am.allocate(new ArrayList<ResourceRequest>(), releaseList)
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+ .getCompletedContainersStatuses();
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+ while (finishedConts.size() < releaseList.size()) {
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+ nm.nodeHeartbeat(true);
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+ finishedConts
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+ .addAll(am
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+ .allocate(new ArrayList<ResourceRequest>(),
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+ new ArrayList<ContainerId>())
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+ .getCompletedContainersStatuses());
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+ Thread.sleep(100);
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+ }
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+
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+ // Register for the second time
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+ RegisterApplicationMasterResponse response = null;
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+ try {
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+ response = am.registerAppAttempt(false);
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+ } catch (InvalidApplicationMasterRequestException e) {
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+ Assert.assertEquals(false, keepContainers);
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+ return;
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+ }
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+ Assert.assertEquals("RM should not allow second register"
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+ + " for UAM without keep container flag ", true, keepContainers);
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+
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+ // Expecting the two running containers previously
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+ Assert.assertEquals(2, response.getContainersFromPreviousAttempts().size());
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+ Assert.assertEquals(1, response.getNMTokensFromPreviousAttempts().size());
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+
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+ // Allocate one more containers to UAM, just to be safe
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+ numContainers = 1;
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+ am.allocate("127.0.0.1", 1000, numContainers, new ArrayList<ContainerId>());
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+ nm.nodeHeartbeat(true);
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+ conts = am.allocate(new ArrayList<ResourceRequest>(),
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+ new ArrayList<ContainerId>()).getAllocatedContainers();
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+ while (conts.size() < numContainers) {
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+ nm.nodeHeartbeat(true);
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+ conts.addAll(am.allocate(new ArrayList<ResourceRequest>(),
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+ new ArrayList<ContainerId>()).getAllocatedContainers());
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+ Thread.sleep(100);
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+ }
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+
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+ rm.stop();
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+ }
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+
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+ @Test(timeout = 600000)
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+ public void testUAMRestartKeepContainers() throws Exception {
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+ testUAMRestart(true);
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+ }
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+
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+ @Test(timeout = 600000)
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+ public void testUAMRestartNoKeepContainers() throws Exception {
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+ testUAMRestart(false);
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+ }
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+
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+}
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Subru Krishnan