org.apache.hama.bsp.YARNBSPJob.java Source code

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Here is the source code for org.apache.hama.bsp.YARNBSPJob.java

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/**
 * 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.hama.bsp;

import java.io.IOException;
import java.net.InetSocketAddress;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.net.NetUtils;
import org.apache.hadoop.yarn.api.ApplicationClientProtocol;
import org.apache.hadoop.yarn.api.protocolrecords.KillApplicationRequest;
import org.apache.hadoop.yarn.api.records.ApplicationReport;
import org.apache.hadoop.yarn.conf.YarnConfiguration;
import org.apache.hadoop.yarn.exceptions.YarnException;
import org.apache.hadoop.yarn.ipc.YarnRPC;
import org.apache.hadoop.yarn.util.Records;
import org.apache.hama.Constants;
import org.apache.hama.HamaConfiguration;

public class YARNBSPJob extends BSPJob {

    private static final Log LOG = LogFactory.getLog(YARNBSPJob.class);

    private static volatile int id = 0;

    private YARNBSPJobClient submitClient;
    private boolean submitted;
    private ApplicationReport report;
    private ApplicationClientProtocol applicationsManager;
    private YarnRPC rpc;

    public YARNBSPJob(HamaConfiguration conf) throws IOException {
        submitClient = new YARNBSPJobClient(conf);
        YarnConfiguration yarnConf = new YarnConfiguration(conf);
        this.rpc = YarnRPC.create(conf);
        InetSocketAddress rmAddress = NetUtils
                .createSocketAddr(yarnConf.get(YarnConfiguration.RM_ADDRESS, YarnConfiguration.DEFAULT_RM_ADDRESS));
        LOG.info("Connecting to ResourceManager at " + rmAddress);

        this.applicationsManager = ((ApplicationClientProtocol) rpc.getProxy(ApplicationClientProtocol.class,
                rmAddress, conf));
    }

    public void setMemoryUsedPerTaskInMb(int mem) {
        conf.setInt("bsp.child.mem.in.mb", mem);
    }

    public void kill() throws YarnException, IOException {
        if (submitClient != null) {
            KillApplicationRequest killRequest = Records.newRecord(KillApplicationRequest.class);
            killRequest.setApplicationId(submitClient.getId());
            applicationsManager.forceKillApplication(killRequest);
        }
    }

    @Override
    public void submit() throws IOException, InterruptedException {
        // If Constants.MAX_TASKS_PER_JOB is null, calculates the max tasks based on resource status.
        this.getConfiguration().setInt(Constants.MAX_TASKS_PER_JOB, getMaxTasks());

        LOG.debug("MaxTasks: " + this.getConfiguration().get(Constants.MAX_TASKS_PER_JOB));

        RunningJob submitJobInternal = submitClient.submitJobInternal(this, new BSPJobID("hama_yarn", id++));

        if (submitJobInternal != null) {
            submitted = true;
            report = submitClient.getReport();
        }
    }

    private int getMaxTasks() {
        int maxMem = this.getConfiguration().getInt("yarn.nodemanager.resource.memory-mb", 0);
        int minAllocationMem = this.getConfiguration().getInt("yarn.scheduler.minimum-allocation-mb", 1024);
        return maxMem / minAllocationMem;
    }

    @Override
    public boolean waitForCompletion(boolean verbose)
            throws IOException, InterruptedException, ClassNotFoundException {

        LOG.info("Starting job...");

        if (!submitted) {
            this.submit();
        }

        if (report != null && report.getApplicationId() == submitClient.getId()) {
            return true;
        } else {
            return false;
        }
    }

    ApplicationClientProtocol getApplicationsManager() {
        return applicationsManager;
    }

}