| /* |
| * 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.twill.internal.yarn; |
| |
| import com.google.common.base.Throwables; |
| import com.google.common.util.concurrent.AbstractIdleService; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.yarn.api.records.Container; |
| import org.apache.hadoop.yarn.api.records.ContainerLaunchContext; |
| import org.apache.hadoop.yarn.api.records.ContainerState; |
| import org.apache.hadoop.yarn.api.records.ContainerStatus; |
| import org.apache.hadoop.yarn.client.api.NMClient; |
| import org.apache.twill.common.Cancellable; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Wrapper class for {@link NMClient} for Hadoop version 2.1 or greater. |
| */ |
| public final class Hadoop21YarnNMClient extends AbstractIdleService implements YarnNMClient { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(Hadoop21YarnNMClient.class); |
| |
| private final NMClient nmClient; |
| |
| public Hadoop21YarnNMClient(Configuration configuration) { |
| this.nmClient = NMClient.createNMClient(); |
| nmClient.init(configuration); |
| } |
| |
| @Override |
| public Cancellable start(YarnContainerInfo containerInfo, YarnLaunchContext launchContext) { |
| try { |
| Container container = containerInfo.getContainer(); |
| nmClient.startContainer(container, launchContext.<ContainerLaunchContext>getLaunchContext()); |
| return new ContainerTerminator(container, nmClient); |
| } catch (Exception e) { |
| LOG.error("Error in launching process", e); |
| throw Throwables.propagate(e); |
| } |
| |
| } |
| |
| @Override |
| protected void startUp() throws Exception { |
| nmClient.start(); |
| } |
| |
| @Override |
| protected void shutDown() throws Exception { |
| nmClient.stop(); |
| } |
| |
| private static final class ContainerTerminator implements Cancellable { |
| |
| private final Container container; |
| private final NMClient nmClient; |
| |
| private ContainerTerminator(Container container, NMClient nmClient) { |
| this.container = container; |
| this.nmClient = nmClient; |
| } |
| |
| @Override |
| public void cancel() { |
| LOG.info("Request to stop container {}.", container.getId()); |
| |
| try { |
| nmClient.stopContainer(container.getId(), container.getNodeId()); |
| boolean completed = false; |
| while (!completed) { |
| ContainerStatus status = nmClient.getContainerStatus(container.getId(), container.getNodeId()); |
| LOG.info("Container status: {} {}", status, status.getDiagnostics()); |
| |
| completed = (status.getState() == ContainerState.COMPLETE); |
| } |
| LOG.info("Container {} stopped.", container.getId()); |
| } catch (Exception e) { |
| LOG.error("Fail to stop container {}", container.getId(), e); |
| throw Throwables.propagate(e); |
| } |
| } |
| } |
| } |