org.apache.sysml.yarn.DMLAppMasterStatusReporter.java Source code

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Here is the source code for org.apache.sysml.yarn.DMLAppMasterStatusReporter.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.sysml.yarn;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.yarn.client.api.AMRMClient;
import org.apache.hadoop.yarn.client.api.AMRMClient.ContainerRequest;

public class DMLAppMasterStatusReporter extends Thread {
    public static long DEFAULT_REPORT_INTERVAL = 5000; // TODO investigate unused field
    private static final Log LOG = LogFactory.getLog(DMLAppMasterStatusReporter.class);

    private AMRMClient<ContainerRequest> _rmClient;
    private long _interval; //in ms
    private volatile boolean _stop;

    public DMLAppMasterStatusReporter(AMRMClient<ContainerRequest> rmClient, long interval) {
        _rmClient = rmClient;
        _interval = interval;
        _stop = false;
    }

    public void stopStatusReporter() {
        _stop = true;
        interrupt();
    }

    @Override
    public void run() {
        while (!_stop && !Thread.currentThread().isInterrupted()) {
            try {
                //report status (serves as heatbeat to RM)
                _rmClient.allocate(0);

                //sleep for interval ms until next report
                Thread.sleep(_interval);
            } catch (InterruptedException ex) {
                LOG.warn("Status reporter interrupted with stop=" + _stop);
            } catch (Exception ex) {
                LOG.error("Failed to report status to ResourceManager.", ex);
            }
        }
    }
}