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Declarative Machine Learning
/*
* 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;
private static final Log LOG = LogFactory.getLog(DMLAppMasterStatusReporter.class);
private AMRMClient _rmClient;
private long _interval; //in ms
private boolean _stop;
public DMLAppMasterStatusReporter(AMRMClient rmClient, long interval)
{
_rmClient = rmClient;
_interval = interval;
_stop = false;
}
public void stopStatusReporter()
{
_stop = true;
}
@Override
public void run()
{
while( !_stop )
{
try
{
//report status (serves as heatbeat to RM)
_rmClient.allocate(0);
//sleep for interval ms until next report
Thread.sleep( _interval );
}
catch(Exception ex)
{
LOG.error("Failed to report status to ResourceManager.", ex);
}
}
}
}